CN116080302A - Novel wheel tread structure of tramcar suitable for high-speed operation - Google Patents
Novel wheel tread structure of tramcar suitable for high-speed operation Download PDFInfo
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- CN116080302A CN116080302A CN202211499997.0A CN202211499997A CN116080302A CN 116080302 A CN116080302 A CN 116080302A CN 202211499997 A CN202211499997 A CN 202211499997A CN 116080302 A CN116080302 A CN 116080302A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B17/00—Wheels characterised by rail-engaging elements
- B60B17/0006—Construction of wheel bodies, e.g. disc wheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention discloses a novel wheel tread structure of a tramcar which is suitable for high-speed running, comprising a rim, a throat root circle high taper area, a normal working area, a nominal rolling circle, an outer end low taper area and an outer end chamfer area which are sequentially and smoothly arranged; the rim consists of a plurality of line segments, and each line segment comprises a rim first straight line segment, a rim first circular arc chamfer segment, a rim second horizontal straight line segment, a rim second circular arc chamfer segment and a rim third straight line segment which are sequentially arranged in a tangential mode. The tread structure of the wheel has the characteristics of low contact stress and small wheel rail abrasion on the 60R2 and CN50 steel rail lines, the equivalent taper and contact angle difference of the tread are uniformly changed, and the equivalent taper of the tread is matched with the suspension parameters of the whole wheel, so that the tramcar has better stability, stability and safety under high-speed running.
Description
Technical Field
The invention relates to the field of wheel treads of railway vehicles, in particular to a novel wheel tread structure of a tramcar suitable for high-speed running.
Background
At present, the contact geometry of wheel rail is the basis of the dynamics research of rolling stock. The tread structure of the wheel is one of the most complex factors in the geometric relationship of contact of the wheel and the rail, is a main structure for bearing the weight of the vehicle, and the structure can be changed along with continuous abrasion of the vehicle due to the large mass of the whole vehicle, so that the dynamic performance of the vehicle can be greatly influenced by the abrasion change of the structure. The existing wheel profile is obtained by long-term application improvement, and the wear type tread is widely adopted, so that the tread can be kept at a stable stage for a long time without larger wear, the wear type tread is generally formed by a plurality of sections of straight lines, circular arcs and curves with different geometric dimensions, and various wheel treads are similar in appearance, but the wheel treads are designed by comprehensively considering the wheel track matching contact parameters and the wheel track wear resistance, and the running stability, the transverse stability and the safety conditions of the vehicle under the wheel track contact parameters so as to obtain the design scheme of the wheel treads for taking into consideration and balancing the performance indexes.
Because of the specificity of tread design, the influence of a large number of complex factors needs to be comprehensively considered, and therefore, the tread design matching scheme is most suitable for different suspension parameters of different rail vehicle manufacturers and different vehicle technical platforms of different rail vehicle manufacturers in countries with different rail construction standards.
Therefore, in order to better adapt to the characteristics of the railway line (simultaneously match the 60R2 and CN50 rail surfaces), optimize various dynamics of the railway electrified vehicle with the traditional wheel set scheme to the maximum extent, improve the abrasion resistance of the wheel rail, ensure the high-speed running capability of the vehicle, and design a novel wheel tread structure of the railway vehicle suitable for high-speed running is needed.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a novel wheel tread structure of a tramcar which is suitable for high-speed operation, so as to overcome the technical problems in the prior art.
For this purpose, the invention adopts the following specific technical scheme:
a novel wheel tread structure suitable for a tramcar running at high speed comprises a rim, a throat root circle high taper area, a normal working area, a nominal rolling circle, an outer end low taper area and an outer end chamfer area which are sequentially and smoothly arranged; the rim consists of a plurality of line segments, and the rim comprises a rim first straight line segment, a rim first circular arc chamfer segment, a rim second horizontal straight line segment, a rim second circular arc chamfer segment and a rim third straight line segment which are sequentially arranged in a tangential mode, different structures are formed by straight lines and circular curves, and different straight lines and circular curves are sequentially connected by a geometric drawing method of plane tangency.
Further, in order to ensure stable use of the rim, the rim height of the rim is 28mm, the rim width is 23mm, and the radius of the second circular arc chamfer section of the rim is 3mm.
Furthermore, in order to ensure that the tread structure has better operation safety performance, the throat root circle high taper area consists of two line segments, including a throat root circle first arc segment and a throat root circle second arc segment which are sequentially arranged in a tangential mode.
Further, in order to reduce wear generated by the vehicle, the normal working area is composed of three line segments, including a normal working area first arc segment, a normal working area second arc segment and a normal working area straight line segment, which are sequentially arranged in a tangential mode.
Further, in order to ensure that the tread structure has better operation safety performance, the transverse distance from the nominal rolling circle to the wheel back is 60mm, and the rim width of the nominal rolling circle is 120mm.
Furthermore, in order to quickly pull the vehicle back to the running center position by the gravity rigidity of the vehicle when the wheels have a rail climbing tendency, the running safety of the vehicle is ensured, and the outer end low taper area consists of an outer end low taper area straight line section.
Further, in order to reduce the loss of the vehicle when the vehicle is running, the outer end chamfer area is composed of 45-degree chamfer straight lines, and the right-angle side of the 45-degree chamfer straight lines is 5mm.
The beneficial effects of the invention are as follows:
1. the tread structure wheel rim part adopts a thin wheel rim structure form, the first straight line section of the 1-1 wheel rim and the third straight line section of the 1-5 wheel rim are designed by heightening the straight line sections, the heightening is used for reducing the track jump risk of the wheel, and the thin wheel rim of the straight line sections is used for enabling the wheel to have proper transverse margin and reducing the abrasion of the wheel rim; because the urban rail tread needs to be matched with the 60R2 groove type rail on the positive line, and the CN 50I-shaped rail needs to be considered in the vehicle section, the contact characteristic of the matched CN 50I-shaped rail is not too bad under the condition that the tread has better contact characteristic on the matched 60R2 groove type rail, and corresponding adaptability work is also performed on the tread.
2. The tread structure has stable equivalent taper in the 0-5mm transverse movement stage, and the equivalent taper rises rapidly after the transverse movement stage of more than 5 mm; the vehicle wheel has the advantages that the vehicle wheel can be effectively guaranteed to have good running stability when running normally, the vehicle wheel is prevented from shaking, but when the vehicle wheel has a rail climbing tendency, the gravity rigidity of the vehicle can rapidly pull the vehicle back to the running center position, and the running safety of the vehicle is guaranteed.
3. The contact angle difference of the tread structure under the matching 60R2 and the CN50 changes more stably in the normal tread contact area of the wheel, and in a large transverse movement section, the contact angle difference is in a rapid rising trend, so that the tread structure has better operation safety performance; when the invention is matched with a 60R2 groove-type rail, in a normal tread contact area of a wheel, the tread wheel rail contact stress of the PZ08 tread can ensure smaller contact stress which is smaller than 1000MPa, and the concave abrasion of the wheel contact area can be effectively relieved.
4. When CN50 is matched, the equivalent taper is larger than that of a 60R2 groove-shaped rail, but the contact stress is controlled within 5000MPa reasonably, so that the vehicle is effectively ensured not to generate excessive abrasion when the vehicle runs.
5. The tread structure of the wheel has the characteristics of low contact stress and small wheel rail abrasion on the 60R2 and CN50 steel rail lines, the equivalent taper and contact angle difference of the tread are uniformly changed, and the equivalent taper of the tread is matched with the suspension parameters of the whole wheel, so that the tramcar has better stability, stability and safety under high-speed running.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a novel wheel tread configuration for a tram adapted for high speed operation in accordance with an embodiment of the present invention;
FIG. 2 is an equivalent taper map of a wheel tread structure in a new wheel tread structure of a tram adapted to high speed operation in accordance with an embodiment of the present invention;
FIG. 3 is a graph of the contact angle difference of a wheel tread structure in a novel wheel tread structure of a tram adapted to high speed operation in accordance with an embodiment of the present invention;
FIG. 4 is a graph of wheel-rail contact stress for a wheel tread structure in a new wheel tread structure for a tram adapted to high speed operation in accordance with an embodiment of the present invention;
FIG. 5 is an assembly view of a novel wheel tread structure of a tram adapted for high speed operation in accordance with an embodiment of the present invention;
FIG. 6 is another angled assembly view of a new wheel tread configuration for a tram adapted for high speed operation in accordance with an embodiment of the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 6 at A;
fig. 8 is a partial enlarged view at B in fig. 5.
In the figure:
1. a rim; 1-1, a first straight line section of the rim; 1-2, a first arc chamfer section of the rim; 1-3, a second horizontal straight line section of the rim; 1-4, a second arc chamfer section of the rim; 1-5, a third straight line section of the rim; 2. a throat root circle high taper area; 2-1, a first circular arc section of the root circle of the throat; 2-2, a second arc section of the root circle of the throat; 3. a constant working area; 3-1, a first circular arc section of the normal working area; 3-2, a second arc section of the normal working area; 3-3, a straight line section of a normal working area; 4. a nominal rolling circle; 5. a low taper region at the outer end; 5-1, the straight line section of the low taper area at the outer end; 6. an outer end chamfer region; 6-1, 45 degree chamfer.
Detailed Description
For the purpose of further illustrating the various embodiments, the present invention provides the accompanying drawings, which are a part of the disclosure of the present invention, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present invention, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to an embodiment of the invention, a novel wheel tread structure of a tramcar suitable for high-speed operation is provided.
The invention is further described with reference to the accompanying drawings and the specific embodiments, as shown in fig. 1-8, the novel wheel tread structure of the tramcar adapting to high-speed running according to the embodiment of the invention comprises a rim 1, a throat root circle high taper area 2, a constant working area 3, a nominal rolling circle 4, an outer end low taper area 5 and an outer end chamfer area 6 which are sequentially and smoothly arranged; the wheel rim 1 consists of 5 line segments, and comprises a wheel rim first straight line segment 1-1 (the slope of the wheel rim first straight line segment 1-1 is 1/6), a wheel rim first circular arc chamfering segment 1-2 (the radius of the wheel rim first circular arc chamfering segment 1-2 is 3 mm), a wheel rim second horizontal straight line segment 1-3, a wheel rim second circular arc chamfering segment 1-4 and a wheel rim third straight line segment 1-5 (the slope of the wheel rim third straight line segment 1-5 is 1/3) which are sequentially arranged in a tangential mode, different structures are formed by sequentially connecting different straight lines and circular curves by a geometric drawing method with tangent planes, the wheel rim height of the wheel rim 1 is 28mm, the wheel rim width is 23mm (the height of a wheel rim width definition point is 10mm from a rolling circle), and the radius of the wheel rim second circular arc chamfering segment 1-4 is 3mm.
Specifically, the tread structure of the wheel is named as 'PZ 08', the 'PZ' represents a technical platform of a high-speed tramcar in a pump town, the '08' represents a wheel track matching equivalent taper of about 0.084, and the '08' is a 60R2 groove type track.
By means of the technical scheme, the tread structure wheel rim part adopts a thin wheel rim structure mode, the first straight line section 1-1 of the wheel rim and the third straight line section 1-5 of the wheel rim are all designed by heightening the straight line sections, the heightening is used for reducing the track jump risk of the wheel, and the thin wheel rim of the straight line sections is used for enabling the wheel to have proper transverse margin, so that the abrasion of the wheel rim is reduced; because the urban rail tread is required to be matched with the 60R2 groove type rail on the positive line, and the CN 50I-shaped rail is required to be considered in the vehicle section, the contact characteristic of the matched CN 50I-shaped rail is not too bad under the condition that the tread has better contact characteristic on the matched 60R2 groove type rail, and corresponding adaptability work is also performed on the tread; the tread structure has stable equivalent taper in the 0-5mm transverse movement stage, and the equivalent taper rises rapidly after the transverse movement stage of more than 5 mm; the vehicle wheel has the advantages that the vehicle wheel can be effectively guaranteed to have good running stability when running normally, the vehicle wheel is prevented from shaking, but when the vehicle wheel has a rail climbing tendency, the gravity rigidity of the vehicle can rapidly pull the vehicle back to the running center position, and the running safety of the vehicle is guaranteed.
In one embodiment, for the above-mentioned high-taper region 2 of the root circle, the high-taper region 2 of the root circle is composed of two line segments, including a first arc segment 2-1 of the root circle (the radius of the first arc segment 2-1 of the root circle is 15 mm) and a second arc segment 2-2 of the root circle (the radius of the second arc segment 2-2 of the root circle is 80 mm) which are sequentially arranged in a tangential manner, so that the tread structure is ensured to have better operation safety performance.
In one embodiment, for the above-mentioned normally working area 3, the normally working area 3 is composed of three line segments, including a normally working area first arc segment 3-1 (the radius of the normally working area first arc segment 3-1 is 90 mm), a normally working area second arc segment 3-2 (the radius of the normally working area second arc segment 3-2 is 350 mm) and a normally working area straight line segment 3-3 (the slope of the normally working area straight line segment 3-3 is 1/40), which are sequentially arranged in a tangential manner, thereby reducing wear generated by the vehicle.
In one embodiment, for the nominal rolling circle 4, the transverse distance between the nominal rolling circle 4 and the wheel back is 60mm, and the rim width of the nominal rolling circle 4 is 120mm, so that the tread structure has better operation safety performance.
Specifically, the nominal rolling circle 4 is a defined origin of coordinates and a lateral distance from the wheel back of 60mm.
In one embodiment, for the outer end low taper region 5, the outer end low taper region 5 is composed of the outer end low taper region straight line segment 5-1 (the slope of the outer end low taper region straight line segment 5-1 is 1/15), so that when the wheel has a track climbing tendency, the gravity stiffness of the vehicle can rapidly pull the vehicle back to the running center position, and running safety of the vehicle is ensured.
In one embodiment, for the above, the outer end chamfer area 6 is composed of 45 degree chamfer lines 6-1, and the right angle side of the 45 degree chamfer line 6-1 is 5mm, thereby reducing the loss of the vehicle when the vehicle is running.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes in detail the working principle or operation manner of the present invention in the actual process.
When the tramcar runs on the track in actual application, the throat root circle high taper area 5, the constant working area 3 and the outer end low taper area 5 in the wheel tread are in contact with the top surface of the track, and when the tramcar moves transversely in a small amount in the running process, the vicinity of the nominal rolling circle 4 in the wheel tread structure is in contact with the top surface of the track; when the transverse displacement of the tramcar is large in the running process, the right side of the nominal rolling circle 4 on the tread structure of one side is contacted with the top surface of the rail, and the left side on the tread structure of the other side is contacted with the rail shoulder of the rail.
In summary, by means of the above technical solution of the present invention, the rim portion of the tread structure of the present invention adopts a thin rim structure, and the rim first straight line segment 1-1 and the rim third straight line segment 1-5 are both designed with raised straight line segments, the raised straight line segments are designed to reduce the risk of wheel track jump, and the thin rims of the straight line segments are designed to allow the wheel to have a proper amount of lateral margin, so as to reduce the rim abrasion; because the urban rail tread is required to be matched with the 60R2 groove type rail on the positive line, and the CN 50I-shaped rail is required to be considered in the vehicle section, the contact characteristic of the matched CN 50I-shaped rail is not too bad under the condition that the tread has better contact characteristic on the matched 60R2 groove type rail, and corresponding adaptability work is also performed on the tread; the tread structure has stable equivalent taper in the 0-5mm transverse movement stage, and the equivalent taper rises rapidly after the transverse movement stage of more than 5 mm; the vehicle wheel has good running stability performance when the vehicle wheel runs normally, and the vehicle wheel is prevented from shaking, but when the vehicle wheel has a rail climbing tendency, the gravity rigidity of the vehicle can rapidly pull the vehicle back to the running center position, so that the running safety of the vehicle is ensured; the contact angle difference of the tread structure under the matching 60R2 and the CN50 changes more stably in the normal tread contact area of the wheel, and in a large transverse movement section, the contact angle difference is in a rapid rising trend, so that the tread structure has better operation safety performance; when the 60R2 groove-shaped rail is matched, in a normal tread contact area of the wheel, the tread wheel rail contact stress of the PZ08 tread can ensure smaller contact stress which is smaller than 1000MPa, so that the concave abrasion of the wheel contact area can be effectively relieved; when CN50 is matched, the equivalent taper is larger than that of a 60R2 groove-shaped rail, but the contact stress is controlled within 5000MPa reasonably, so that the vehicle is effectively ensured not to generate excessive abrasion when the vehicle runs; the tread structure of the wheel has the characteristics of low contact stress and small wheel rail abrasion on the 60R2 and CN50 steel rail lines, the equivalent taper and contact angle difference of the tread are uniformly changed, and the equivalent taper of the tread is matched with the suspension parameters of the whole wheel, so that the tramcar has better stability, stability and safety under high-speed running.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The novel wheel tread structure of the tramcar suitable for high-speed running is characterized by comprising a rim (1), a throat root circle high taper area (2), a normal working area (3), a nominal rolling circle (4), an outer end low taper area (5) and an outer end chamfer area (6) which are sequentially and smoothly arranged;
the rim (1) consists of 5 line segments, and comprises a rim first straight line segment (1-1), a rim first circular arc chamfer segment (1-2), a rim second horizontal straight line segment (1-3), a rim second circular arc chamfer segment (1-4) and a rim third straight line segment (1-5) which are sequentially arranged in a tangential mode.
2. A new wheel tread structure for a tram adapted to high-speed operation according to claim 1, characterized in that the rim (1) has a rim height of 28mm and a rim width of 23mm.
3. A new wheel tread structure for a tram adapted to high-speed operation according to claim 1, characterized in that the radius of the second circular arc chamfer section (1-4) of the rim is 3mm.
4. The novel wheel tread structure of the tramcar suitable for high-speed operation according to claim 1, wherein the throat root circle high taper area (2) is composed of two line segments, and comprises a throat root circle first arc segment (2-1) and a throat root circle second arc segment (2-2) which are sequentially arranged in a tangential mode.
5. The novel wheel tread structure of the tramcar suitable for high-speed operation according to claim 1, wherein the normal working area (3) is composed of three line segments, and comprises a normal working area first circular arc segment (3-1), a normal working area second circular arc segment (3-2) and a normal working area straight line segment (3-3) which are sequentially arranged in a tangential mode.
6. A new wheel tread structure for a tram adapted to high-speed operation according to claim 1, characterized in that the transverse distance of the nominal rolling circle (4) from the wheel back is 60mm.
7. A new wheel tread structure for a tram adapted to high-speed operation according to claim 6, characterized in that the nominal rolling circle (4) has a rim width of 120mm.
8. The novel wheel tread structure of the tramcar suitable for high-speed operation according to claim 1, wherein the outer low-taper area (5) is composed of an outer low-taper area straight line section (5-1).
9. A new wheel tread structure for a tram adapted to high speed operation according to claim 1, characterized in that the outer end chamfer area (6) consists of 45 degree chamfer lines (6-1).
10. The novel wheel tread structure of a tram adapted to high-speed operation according to claim 9, wherein the straight line (6-1) of the 45 degree chamfer has a right angle side of 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211499997.0A CN116080302A (en) | 2022-11-28 | 2022-11-28 | Novel wheel tread structure of tramcar suitable for high-speed operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211499997.0A CN116080302A (en) | 2022-11-28 | 2022-11-28 | Novel wheel tread structure of tramcar suitable for high-speed operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116080302A true CN116080302A (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211499997.0A Pending CN116080302A (en) | 2022-11-28 | 2022-11-28 | Novel wheel tread structure of tramcar suitable for high-speed operation |
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| Country | Link |
|---|---|
| CN (1) | CN116080302A (en) |
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2022
- 2022-11-28 CN CN202211499997.0A patent/CN116080302A/en active Pending
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