CN107830086A - A kind of dumper vehicle brake and its design method - Google Patents
A kind of dumper vehicle brake and its design method Download PDFInfo
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- CN107830086A CN107830086A CN201711014089.7A CN201711014089A CN107830086A CN 107830086 A CN107830086 A CN 107830086A CN 201711014089 A CN201711014089 A CN 201711014089A CN 107830086 A CN107830086 A CN 107830086A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/228—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
- F16D65/186—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with full-face force-applying member, e.g. annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0016—Brake calipers
- F16D2055/002—Brake calipers assembled from a plurality of parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Braking Arrangements (AREA)
Abstract
A kind of dumper vehicle brake and its design method, including Electric Motor Wheel support body, running brake is provided with Electric Motor Wheel support body, parking brake and brake disc, the running brake includes the service brake pincers component for being located at brake disc both sides, the service brake pincers component includes two interior driving caliper cover plates be arrangeding in parallel and outer driving caliper cover plate, the running brake of dumper vehicle brake, parking brake can make speed be reduced to required value with appropriate deceleration in the process of moving by acting on braking to realize, vehicle is set to keep the functions such as appropriate stabilized speed when descending is exercised.
Description
Technical field
The present invention relates to dumper field, and in particular to a kind of dumper vehicle brake and its design method.
Background technology
Selection currently for the brake of dumper vehicle is typically all with reference to Experience Design, the theoretical meter of neither one
The method for calculating selection, so when use condition changes, it is impossible to well adapt to.
The content of the invention
The invention provides a kind of dumper vehicle brake reasonable in design, good braking effect.
In order to solve the above-mentioned technical problem, the present invention includes Electric Motor Wheel support body, and service brake is provided with Electric Motor Wheel support body
Device, parking brake and brake disc, the running brake include the service brake pincers component for being located at brake disc both sides, the row
Car brake caliper assemblies include two interior driving caliper cover plates be arrangeding in parallel and outer driving caliper cover plate, in Electric Motor Wheel support body
The fixed seat being connected with interior driving caliper cover plate is provided with, interior driving caliper cover plate and outer driving caliper cover plate pass through spiral shell
Tether and connect, form the first cavity between interior driving caliper cover plate and outer driving caliper cover plate, cover plate is clamped in interior service brake
First piston component is provided with outer driving caliper cover plate, the drive end of first piston component is provided with the first friction plate, and first
Friction plate is in the first cavity, and one end of brake disc is between two the first friction plates, and the parking brake includes interior
Stopping brake clamps cover plate and outer stopping brake pincers cover plate, is additionally provided with what is be connected with interior stopping brake pincers cover plate on Electric Motor Wheel support body
Fixed seat, interior stopping brake pincers cover plate and outer stopping brake pincers cover plate are bolted, and interior stopping brake clamps cover plate and stopped outside
The second cavity is formed between car caliper cover plate, second piston component is provided with outer stopping brake pincers cover plate, in second piston
The drive end of component is provided with the second friction plate, and the second friction plate is in the second cavity, and the is in interior stopping brake pincers cover plate
The end face of two cavitys is provided with the second friction plate, and one end of brake disc is between two the second friction plates.
As a further improvement on the present invention, the first piston component includes first piston housing and the first depression bar,
Corresponding first depression bar opening position is provided with first through hole on interior driving caliper cover plate and outer driving caliper cover plate, at first through hole
Provided with the first sliding sleeve for having the first depression bar to be slidably matched, the first depression bar passes through from first through hole, is provided with first piston housing
First chute, the first groove is provided with the first depression bar, is provided with inner carrier body in the first groove, the upper end of inner carrier body and the
One slide coordinates, and packing ring and inner carrier spring is cased with interior piston body, inner carrier spring is in packing ring and the first groove
Bottom between, interior service brake clamp cover plate and it is outer driving caliper cover plate on be additionally provided with logical oily interface.
The present invention also provides a kind of design method of dumper vehicle brake, comprises the following steps：
A, the condition that the known parameters of dumper and self-dumping truck braking system performance meet is determined：
(1) determine that the known parameters of dumper, including dumper are fully loaded with gross mass G0, dumper wheelbase L, dumper be fully loaded with
Propons is to centroidal distance L1, dumper be fully loaded with back axle to centroidal distance L2, dumper be fully loaded with height of C.G. hg, dumper tire rolling
Dynamic radius R0, dumper max. speed Vmax, self-unloading vehicle wheel side rotating ratio i；
(2) self-dumping truck braking system performance meets the requirement of ISO 3450-2011 standards；
B, the braking moment required for vehicle brake is determined：
(1) the minimum braking moment needed for running brake is determined, with reference first to ISO 3450-2011 standards, for big
Need to be braked on 8%-10% ramp in 32 tons of dumpers, calculate choose 10% the gradient, its maximum braking away from
From SmaxMeet (1) formula：
In formula, VmaxMaximal rate is run for vehicle, α is the gradient being expressed as a percentage,
Under actual state, due to also having response time and system pressure reaction time, braked so dumper is actual
Distance is (2) formula：
In formula, t' is elimination off time, t " is pressure rise time, t1For driver's reflecting time, t2Acted on for brake
Time, t3For continuous braking time, aminFor minimum braking deceleration,
It is (3) formula that (2) formula, which is brought into (1) formula to obtain vehicle braking minimum deceleration degree,：
(2) brake force and braking moment needed for braking on ramp are determined, when being braked on ramp, wheel is rolled vehicle
Frictional force, direction backward, wheel braking force, direction backward,
Then brake power needed for vehicle is：Fz1≥G·a+G·g·sinθ-G·g·μ (4)；
Service brake torque is needed for vehicle：Tz1=Fz1×R0(5)；
Wherein G is equivalent mass, as vehicular gross combined weight G0With Equivalent Rotational quality sum, Equivalent Rotational quality is to consider
The equivalent mass of rotatable parts, a are vehicle braking deceleration, and g is acceleration of gravity, and θ is road grade, and μ is rolling friction system
Number；
(3) fully loaded axle load ratio is calculated：
According to equalising torque, show that dumper antero posterior axis weight on θ ramps is (6) formula and (7) formula,
In formula, m is vehicle mass, and m takes G when fully loaded0,
Can obtain the fully loaded axle load ratio in θ road grades by (6) formula and (7) formula is：F1:F2；
(4) fully loaded brake force is calculated：
It is (8) formula that fully loaded all brakes of propons, which need to provide brake force,：
It is (9) formula that fully loaded all brakes of back axle, which need to provide brake force,
(5) braking moment needed for running brake is calculated：
Assuming that the quantity of the running brake of self-unloading front axle is A, the quantity of the running brake of dumper back axle is B,
Brake force and torque are shown in (10) formula and (11) formula needed for the single brake of propons：
Brake force and torque are shown in (12) formula and (13) formula needed for the single running brake of back axle：
(6) braking moment needed for parking brake is calculated：
Parking brake and single parking braking torque are shown in (14) formula and (15) formula：
Fz2'=mgsin θ (14),
C is the quantity of parking brake in formula；
C, ground attaching coefficient is determined：
D, running brake brake pressure is calculated：
Propons is fully loaded with brake pressure：
Back axle is fully loaded with brake pressure：
K1For front wheel brake coefficient；
K2For rear service brake coefficient；
R1For front wheel brake operating radius；
R2For rear wheel brake operating radius；
Front and rear running brake brake pressure value p can be obtained by (17), (18)1And p2；
E, the selection of model is carried out according to the parameters of the above-mentioned running brake drawn and parking brake.
Brief description of the drawings
It is next with reference to the accompanying drawings and detailed description that the present invention will be further described in detail.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is that the service brake of the present invention clamps the partial sectional view of component.
Fig. 3 is the partial sectional view of the first piston component of the present invention.
Fig. 4 is relational view of the reaction time with self-unloading vehicle speed of the present invention.
Embodiment
As shown in Fig. 1 to Fig. 4, the present invention includes Electric Motor Wheel support body 1, and running brake is provided with Electric Motor Wheel support body 1, is stopped
Car brake and brake disc 2, the running brake include the service brake pincers component 3 for being located at the both sides of brake disc 2, the driving
Brake caliper assemblies 3 include two interior driving caliper cover plates 4 be arrangeding in parallel and outer driving caliper cover plate 5, in electronic wheel carrier
Body 1 is provided with the fixed seat 6 being connected with interior driving caliper cover plate 4, interior driving caliper cover plate 4 and outer driving caliper cover plate
5 are bolted, and form the first cavity 19 between interior driving caliper cover plate 4 and outer driving caliper cover plate 5, drive a vehicle inside
Caliper cover plate 4 and outer driving caliper cover plate 5 are provided with first piston component 7, and the first piston component 7 includes first and lived
The depression bar 9 of housing 8 and first is filled in, the corresponding position of first depression bar 9 on cover plate 4 and outer driving caliper cover plate 5 is clamped in interior service brake
Place is provided with first through hole 10, the first sliding sleeve 11 being slidably matched at first through hole 10 provided with the first depression bar 9, and the first depression bar 9 is from the
One through hole 10 passes through, and is provided with the first chute 12 in the first piston housing 8, the first groove 13 is provided with the first depression bar 9, the
Inner carrier body 14 is provided with one groove 13, the upper end of inner carrier body 14 is slidably matched with the first chute 12, on interior piston body 14
Packing ring 15 and inner carrier spring 16 are cased with, inner carrier spring 16 is between the bottom of the groove 13 of packing ring 15 and first, in expert
Logical oily interface 17 is additionally provided with car caliper cover plate 4 and outer driving caliper cover plate 5, in the first depression bar 9 of first piston component 7
Lower end be provided with the first friction plate 18, the first friction plate 18 is in the first cavity 19, and one end of brake disc 2 is in two first
Between friction plate 18, the parking brake includes interior stopping brake pincers cover plate 20 and outer stopping brake pincers cover plate 21, electronic
The fixed seat 6 being connected with interior stopping brake pincers cover plate 20, interior stopping brake pincers cover plate 20 and outer parking system are additionally provided with wheel support body 1
Dynamic pincers cover plate 21 is bolted, and the second chamber is formed between interior stopping brake pincers cover plate 20 and outer stopping brake pincers cover plate 21
Body, second piston component 22 is provided with outer stopping brake pincers cover plate 21, and second is provided with the drive end of second piston component 22
Friction plate, the second friction plate are in the second cavity, are on the end face of the second cavity and are provided with interior stopping brake pincers cover plate 20
Second friction plate, one end of brake disc 2 are between two the second friction plates.
Brakes is the most important condition of vehicle safety, and it must possess three basic functions：Firstth, in the process of moving
Speed can be made to be reduced to required value (including null value) with appropriate deceleration.Secondth, vehicle is made to be kept when descending is exercised
Appropriate stabilized speed.3rd, making vehicle, reliably (including on the slope) comes to a complete stop in situ.And dumper vehicle brake
Running brake, parking brake realize above-mentioned function by acting on brake disc 2.By to first piston component 7 and
The fuel feeding pressure of two piston component 22 changes the position of the first friction plate 18, the second friction plate, first friction plate 18, second is rubbed
Piece effect brake disc 2 is realized.In first piston component 7, because being cased with packing ring 15 and inner carrier spring on interior piston body 14
16, it can so ensure the stationarity that inner carrier body 14 moves, while the first sliding sleeve 11 can ensure the flat of the first depression bar 9 motion
Stability, prevent rocking for the motion process of the first depression bar 9.
Present invention additionally comprises a kind of design method of dumper vehicle brake, comprise the following steps：
A, the condition that the known parameters of dumper and self-dumping truck braking system performance meet is determined：
(1) determine that the known parameters of dumper, including dumper are fully loaded with gross mass G0, dumper wheelbase L, dumper be fully loaded with
Propons is to centroidal distance L1, dumper be fully loaded with back axle to centroidal distance L2, dumper be fully loaded with height of C.G. hg, dumper tire rolling
Dynamic radius R0, dumper max. speed Vmax, self-unloading vehicle wheel side rotating ratio i；
(2) self-dumping truck braking system performance meets the requirement of ISO 3450-2011 standards；
B, the braking moment required for vehicle brake is determined：
(1) the minimum braking moment needed for running brake is determined, with reference first to ISO 3450-2011 standards, for big
Need to be braked on 8%-10% ramp in 32 tons of dumpers, calculate choose 10% the gradient, its maximum braking away from
From SmaxMeet (1) formula：
In formula, VmaxMaximal rate is run for vehicle, α is the gradient being expressed as a percentage,
Under actual state, due to also having response time and system pressure reaction time, braked so dumper is actual
Distance is (2) formula：
In formula, t' is elimination off time, t " is pressure rise time, t1For driver's reflecting time, t2Acted on for brake
Time, t3For continuous braking time, aminFor minimum braking deceleration,
It is (3) formula that (2) formula, which is brought into (1) formula to obtain vehicle braking minimum deceleration degree,：
(2) brake force and braking moment needed for braking on ramp are determined, when being braked on ramp, wheel is rolled vehicle
Frictional force, direction backward, wheel braking force, direction backward,
Then brake power needed for vehicle is：Fz1≥G·a+G·g·sinθ-G·g·μ (4)；
Service brake torque is needed for vehicle：Tz1=Fz1×R0(5)；
Wherein G is equivalent mass, as vehicular gross combined weight G0With Equivalent Rotational quality sum, Equivalent Rotational quality is to consider
The equivalent mass of rotatable parts, a are vehicle braking deceleration, and g is acceleration of gravity, and θ is road grade, and μ is rolling friction system
Number；
(3) fully loaded axle load ratio is calculated：
According to equalising torque, show that dumper antero posterior axis weight on θ ramps is (6) formula and (7) formula,
In formula, m is vehicle mass, and m takes G when fully loaded0,
Can obtain the fully loaded axle load ratio in θ road grades by (6) formula and (7) formula is：F1:F2；
(4) fully loaded brake force is calculated：
It is (8) formula that fully loaded all brakes of propons, which need to provide brake force,：
It is (9) formula that fully loaded all brakes of back axle, which need to provide brake force,
(5) braking moment needed for running brake is calculated：
Assuming that the quantity of the running brake of self-unloading front axle is A, the quantity of the running brake of dumper back axle is B,
Brake force and torque are shown in (10) formula and (11) formula needed for the single brake of propons：
Brake force and torque are shown in (12) formula and (13) formula needed for the single running brake of back axle：
(6) braking moment needed for parking brake is calculated：
Parking brake and single parking braking torque are shown in (14) formula and (15) formula：
Fz2'=mgsin θ (14),
C is the quantity of parking brake in formula；
C, ground attaching coefficient is determined：
D, running brake brake pressure is calculated：
Propons is fully loaded with brake pressure：
Back axle is fully loaded with brake pressure：
K1For front wheel brake coefficient；
K2For rear service brake coefficient；
R1For front wheel brake operating radius；
R2For rear wheel brake operating radius；
Front and rear running brake brake pressure value p can be obtained by (17), (18)1And p2；
E, the selection of model is carried out according to the parameters of the above-mentioned running brake drawn and parking brake.
Claims (3)
1. a kind of dumper vehicle brake, including Electric Motor Wheel support body, running brake, parking system are provided with Electric Motor Wheel support body
Dynamic device and brake disc, it is characterised in that：The running brake includes the service brake pincers component for being located at brake disc both sides, described
Service brake pincers component includes two interior driving caliper cover plates be arrangeding in parallel and outer driving caliper cover plate, in electronic wheel carrier
Body is provided with the fixed seat being connected with interior driving caliper cover plate, and interior driving caliper cover plate and outer driving caliper cover plate pass through
Bolt connection, the first cavity is formed between interior driving caliper cover plate and outer driving caliper cover plate, clamps and covers in interior service brake
Plate and outer driving caliper cover plate are provided with first piston component, and the drive end of first piston component is provided with the first friction plate, the
One friction plate is in the first cavity, and one end of brake disc is between two the first friction plates, and the parking brake includes
Interior stopping brake pincers cover plate and outer stopping brake pincers cover plate, are additionally provided with Electric Motor Wheel support body and are connected with interior stopping brake pincers cover plate
Fixed seat, interior stopping brake pincers cover plate and outer stopping brake pincers cover plate be bolted, interior stopping brake pincers cover plate and outer
The second cavity is formed between stopping brake pincers cover plate, second piston component is provided with outer stopping brake pincers cover plate, is lived second
The drive end of plug assembly is provided with the second friction plate, and the second friction plate is in the second cavity, is in interior stopping brake pincers cover plate
The end face of second cavity is provided with the second friction plate, and one end of brake disc is between two the second friction plates.
2. the dumper vehicle brake as described in claim 1, it is characterised in that：The first piston component includes first and lived
Housing and the first depression bar are filled in, clamping corresponding first depression bar opening position on cover plate and outer driving caliper cover plate in interior service brake is provided with
First through hole, the first sliding sleeve that the first depression bar is slidably matched is provided with first through hole, the first depression bar passes through from first through hole, the
The first chute is provided with one piston shell, the first groove is provided with the first depression bar, inner carrier body is provided with the first groove, it is interior
The upper end of piston body and the first slide coordinate, and are cased with packing ring and inner carrier spring on interior piston body, at inner carrier spring
Between the bottom of packing ring and the first groove, clamped in interior service brake and be additionally provided with logical oil on cover plate and outer driving caliper cover plate and connect
Mouthful.
A kind of 3. design method of dumper vehicle brake, it is characterised in that：Comprise the following steps：
A, the condition that the known parameters of dumper and self-dumping truck braking system performance meet is determined：
(1) determine that the known parameters of dumper, including dumper are fully loaded with gross mass G0, dumper wheelbase L, dumper be fully loaded with propons
To centroidal distance L1, dumper be fully loaded with back axle to centroidal distance L2, dumper be fully loaded with height of C.G. hg, dumper tire rolling half
Footpath R0, dumper max. speed Vmax, self-unloading vehicle wheel side rotating ratio i；
(2) self-dumping truck braking system performance meets the requirement of ISO 3450-2011 standards；
B, the braking moment required for vehicle brake is determined：
(1) the minimum braking moment needed for running brake is determined, with reference first to ISO 3450-2011 standards, for more than 32
The dumper of ton needs to be braked on 8%-10% ramp, calculates the gradient of selection 10%, its maximum braking distance Smax
Meet (1) formula：
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In formula, VmaxMaximal rate is run for vehicle, α is the gradient being expressed as a percentage,
Under actual state, due to also having response time and system pressure reaction time, so the actual distance braked of dumper
For (2) formula：
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Between, t3For continuous braking time, aminFor minimum braking deceleration,
It is (3) formula that (2) formula, which is brought into (1) formula to obtain vehicle braking minimum deceleration degree,：
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(2) brake force and braking moment needed for braking on ramp are determined, for vehicle when being braked on ramp, wheel is by rolling friction
Power, direction backward, wheel braking force, direction backward,
Then brake power needed for vehicle is：Fz1≥G·a+G·g·sinθ-G·g·μ (4)；
Service brake torque is needed for vehicle：Tz1=Fz1×R0(5)；
Wherein G is equivalent mass, as vehicular gross combined weight G0With Equivalent Rotational quality sum, Equivalent Rotational quality is to consider to rotate
The equivalent mass of part, a are vehicle braking deceleration, and g is acceleration of gravity, and θ is road grade, and μ is coefficient of rolling friction；
(3) fully loaded axle load ratio is calculated：
According to equalising torque, show that dumper antero posterior axis weight on θ ramps is (6) formula and (7) formula,
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<mo>+</mo>
<mi>m</mi>
<mi>g</mi>
<mi> </mi>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mrow>
<mo>(</mo>
<mi>&theta;</mi>
<mo>)</mo>
</mrow>
<mo>&CenterDot;</mo>
<mi>h</mi>
<mo>+</mo>
<mi>m</mi>
<mi>a</mi>
<mo>&CenterDot;</mo>
<mi>h</mi>
</mrow>
<mi>L</mi>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
<mrow>
<msub>
<mi>F</mi>
<mn>2</mn>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mi>m</mi>
<mi>g</mi>
<mi> </mi>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>&theta;</mi>
<mo>)</mo>
</mrow>
<mo>&CenterDot;</mo>
<msub>
<mi>L</mi>
<mn>1</mn>
</msub>
<mo>-</mo>
<mi>m</mi>
<mi>g</mi>
<mi> </mi>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mrow>
<mo>(</mo>
<mi>&theta;</mi>
<mo>)</mo>
</mrow>
<mo>&CenterDot;</mo>
<mi>h</mi>
<mo>-</mo>
<mi>m</mi>
<mi>a</mi>
<mo>&CenterDot;</mo>
<mi>h</mi>
</mrow>
<mi>L</mi>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>7</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
In formula, m is vehicle mass, and m takes G when fully loaded0,
Can obtain the fully loaded axle load ratio in θ road grades by (6) formula and (7) formula is：F1:F2；
(4) fully loaded brake force is calculated：
It is (8) formula that fully loaded all brakes of propons, which need to provide brake force,：
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>z</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<mfrac>
<msub>
<mi>F</mi>
<mn>1</mn>
</msub>
<mrow>
<msub>
<mi>F</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>F</mi>
<mn>2</mn>
</msub>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>8</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
It is (9) formula that fully loaded all brakes of back axle, which need to provide brake force,
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>h</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>z</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<mfrac>
<msub>
<mi>F</mi>
<mn>2</mn>
</msub>
<mrow>
<msub>
<mi>F</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>F</mi>
<mn>2</mn>
</msub>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>9</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
(5) braking moment needed for running brake is calculated：
Assuming that the quantity of the running brake of self-unloading front axle is A, the quantity of the running brake of dumper back axle is B, propons
Brake force and torque needed for single brake are shown in (10) formula and (11) formula：
<mfenced open = "" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>z</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>q</mi>
</mrow>
</msub>
<mi>A</mi>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>10</mn>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
</mtd>
<mtd>
<mrow>
<msub>
<mi>T</mi>
<mrow>
<mi>z</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>R</mi>
<mn>0</mn>
</msub>
</mrow>
<mi>A</mi>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>11</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Brake force and torque are shown in (12) formula and (13) formula needed for the single running brake of back axle：
<mfenced open = "" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>z</mi>
<mi>h</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>h</mi>
</mrow>
</msub>
<mrow>
<mi>B</mi>
<mo>&CenterDot;</mo>
<msub>
<mi>i</mi>
<mn>0</mn>
</msub>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>12</mn>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
</mtd>
<mtd>
<mrow>
<msub>
<mi>T</mi>
<mrow>
<mi>z</mi>
<mi>h</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>h</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>R</mi>
<mn>0</mn>
</msub>
</mrow>
<mrow>
<mi>B</mi>
<mo>&CenterDot;</mo>
<msub>
<mi>i</mi>
<mn>0</mn>
</msub>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>13</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
(6) braking moment needed for parking brake is calculated：
Parking brake and single parking braking torque are shown in (14) formula and (15) formula：
Fz2'=mgsin θ (14),
C is the quantity of parking brake in formula；
C, ground attaching coefficient is determined：
D, running brake brake pressure is calculated：
Propons is fully loaded with brake pressure：
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>AT</mi>
<mn>1</mn>
</msub>
</mrow>
<msub>
<mi>R</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>=</mo>
<mfrac>
<mrow>
<mi>A</mi>
<mo>&CenterDot;</mo>
<msub>
<mi>K</mi>
<mn>1</mn>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>p</mi>
<mn>1</mn>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>R</mi>
<mn>1</mn>
</msub>
</mrow>
<msub>
<mi>R</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>17</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
Back axle is fully loaded with brake pressure：
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>h</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>BT</mi>
<mn>2</mn>
</msub>
</mrow>
<msub>
<mi>R</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>=</mo>
<mfrac>
<mrow>
<mi>B</mi>
<mo>&CenterDot;</mo>
<mi>i</mi>
<mo>&CenterDot;</mo>
<msub>
<mi>K</mi>
<mn>2</mn>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>p</mi>
<mn>2</mn>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>R</mi>
<mn>2</mn>
</msub>
</mrow>
<msub>
<mi>R</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>18</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
K1For front wheel brake coefficient；
K2For rear service brake coefficient；
R1For front wheel brake operating radius；
R2For rear wheel brake operating radius；
Front and rear running brake brake pressure value p can be obtained by (17), (18)1And p2；
E, the selection of model is carried out according to the parameters of the above-mentioned running brake drawn and parking brake.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109033682A (en) * | 2018-08-13 | 2018-12-18 | 广州电力机车有限公司 | A kind of design method of dumper brake |
| CN110953268A (en) * | 2019-12-02 | 2020-04-03 | 河南速达电动汽车科技有限公司 | Vehicle and automobile braking device thereof |
| CN111609062A (en) * | 2020-06-04 | 2020-09-01 | 徐州徐工矿业机械有限公司 | Installation device for adjusting gap of parking brake, parking brake and mining dump truck |
| CN113218699A (en) * | 2021-03-30 | 2021-08-06 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Train ditch coal flow sampling system and method |
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| US5671827A (en) * | 1995-11-07 | 1997-09-30 | Demetriou; Ikaros | Air disc brake |
| CN202156403U (en) * | 2011-07-31 | 2012-03-07 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Electronic travelling crane braking system for mining electric wheeled dumper |
| CN205173299U (en) * | 2015-11-30 | 2016-04-20 | 北京长城华冠汽车科技股份有限公司 | Disc brake assembly and car |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5671827A (en) * | 1995-11-07 | 1997-09-30 | Demetriou; Ikaros | Air disc brake |
| CN202156403U (en) * | 2011-07-31 | 2012-03-07 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Electronic travelling crane braking system for mining electric wheeled dumper |
| CN205173299U (en) * | 2015-11-30 | 2016-04-20 | 北京长城华冠汽车科技股份有限公司 | Disc brake assembly and car |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109033682A (en) * | 2018-08-13 | 2018-12-18 | 广州电力机车有限公司 | A kind of design method of dumper brake |
| CN110953268A (en) * | 2019-12-02 | 2020-04-03 | 河南速达电动汽车科技有限公司 | Vehicle and automobile braking device thereof |
| CN111609062A (en) * | 2020-06-04 | 2020-09-01 | 徐州徐工矿业机械有限公司 | Installation device for adjusting gap of parking brake, parking brake and mining dump truck |
| CN111609062B (en) * | 2020-06-04 | 2021-09-14 | 徐州徐工矿业机械有限公司 | Installation device for adjusting gap of parking brake, parking brake and mining dump truck |
| CN113218699A (en) * | 2021-03-30 | 2021-08-06 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Train ditch coal flow sampling system and method |
| CN113218699B (en) * | 2021-03-30 | 2022-11-18 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Train ditch coal flow sampling system and method |
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|---|---|
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