CN117382698A - Power-assisted driving device and method for ore unloading station of rail locomotive - Google Patents
Power-assisted driving device and method for ore unloading station of rail locomotive Download PDFInfo
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- CN117382698A CN117382698A CN202311358368.0A CN202311358368A CN117382698A CN 117382698 A CN117382698 A CN 117382698A CN 202311358368 A CN202311358368 A CN 202311358368A CN 117382698 A CN117382698 A CN 117382698A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G35/00—Mechanical conveyors not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D3/00—Wagons or vans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K13/00—Other auxiliaries or accessories for railways
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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Abstract
The invention provides a power-assisted driving device and a power-assisted driving method for a railway locomotive ore discharging station, which relate to the technical field of railway locomotive auxiliary devices and comprise four mounting plates and four groups of driving units which are symmetrically arranged; the mounting plates are arranged on two sides of the ore discharging station and are perpendicular to the movement direction of the electric locomotive; each group of driving units comprises a rocker arm, a telescopic assembly, a rotary driving assembly and a friction wheel. The rocker arm is of an L-shaped structure, and one end of the rocker arm is hinged with the mounting plate through the first rotating seat; the first rotating seat is provided with a swing detection switch; the end part of the telescopic component is hinged with the mounting plate through a second rotating seat; the telescopic end of the telescopic component is hinged with the other end of the rocker arm; the rotary driving component is fixedly arranged in the center of the rocker arm; the wheel axle of the friction wheel is fixedly connected with the output end of the rotary driving assembly. The power-assisted driving device realizes the low-speed stable ore unloading of the electric locomotive through the ore unloading station.
Description
Technical Field
The invention relates to the technical field of auxiliary devices of rail locomotives, in particular to a power-assisted driving device and a power-assisted driving method for a mining unloading station of a rail locomotive.
Background
In the existing underground metal mine system, the rail transportation of the locomotive is taken as an indispensable link of a plurality of mines, and takes a position with enough weight, the quality of the rail locomotive transportation system directly influences the completion of the mine yield, and in the rail locomotive transportation system, the ore unloading station of the rail locomotive is divided into a plurality of modes including a car dumper mode, a side-opening side-unloading mode and a bottom side-unloading mode. Different ore unloading modes are adopted under different yields and environments; among them, in the large-scale underground metal mine unloading mode, the bottom side inclined mode adopts comparatively more, because this mode unloads the ore fast each time, unloads the ore volume and has obtained wide application. However, the unloading mode has the defects that the bottom of the electric locomotive needs to be opened when the electric locomotive unloads the ore, and the driving force cannot be realized by wheels, so that the electric locomotive needs to accelerate before the ore unloading station each time, passes through the ore unloading bin through inertia, is carried on a plurality of tugs of the ore unloading station by utilizing wing plates at two sides when passing through, and finally passes through the ore unloading station quickly through inertia by being lifted by the tugs.
Because the inertia of relying on the electric locomotive passes through when unloading, because the pterygoid lamina relies on the effect of a plurality of tugs, can cause very big vibrations to the equipment machinery and the electrical equipment of electric locomotive, very easily cause not hard up or damage to the machinery and the electrical component of electric locomotive, reduce the life of electric locomotive simultaneously.
Disclosure of Invention
The invention provides a power-assisted driving device and a power-assisted driving method for a mining unloading station of a rail locomotive, which realize the low-speed stable mining unloading of an electric locomotive through the mining unloading station. The invention provides the following technical scheme.
The power-assisted driving device for the unloading station of the rail locomotive comprises four mounting plates and four groups of driving units which are symmetrically arranged; the mounting plates are erected on two sides of the ore unloading station and are perpendicular to the movement direction of the electric locomotive; each set of the driving units includes:
rocker arm, L-shaped structure; one end of the rocker arm is hinged with the mounting plate through a first rotating seat; the first rotating seat is provided with a swing detection switch;
the end part of the telescopic component is hinged with the mounting plate through a second rotating seat; the telescopic end of the telescopic component is hinged with the other end of the rocker arm;
the rotary driving assembly is fixedly arranged in the center of the rocker arm;
the wheel shaft of the friction wheel is fixedly connected with the output end of the rotary driving assembly;
when the electric locomotive passes through, the locomotive body extrudes the friction wheel, the rocker swings to trigger the swing detection switch, the rotary driving assembly drives the friction wheel to rotate to provide power, and the telescopic assembly stretches to provide supporting force so as to increase the friction force between the friction wheel and the locomotive body.
Preferably, the telescopic component is a hydraulic push rod; the end part of the hydraulic push rod is hinged with the mounting plate through a second rotating seat, and the telescopic end of the hydraulic push rod is hinged with the other end of the rocker arm.
Preferably, the rotary driving assembly is a driving motor; the driving motor is fixedly arranged at the center of the rocker arm, and an output shaft of the driving motor is fixedly connected with the wheel shaft of the friction wheel.
Preferably, the outer edge of the friction wheel is made of rubber.
The driving method of the power-assisted driving device of the unloading station of the rail locomotive is characterized by comprising the following steps of:
determining total power P dragged by double motors in normal full-speed operation of the electric locomotive, and distributing the total power P to motor power P of driving motor where each friction wheel is located 1 ；
Calculating the maximum total friction tension force F=mg according to the maximum load m of the electric locomotive, and then the maximum friction tension force F of each friction wheel 1 The method comprises the following steps:
F 1 ＝F/4
obtaining the extrusion force F of each friction wheel to the vehicle body according to the maximum friction pull force of each friction wheel Pressing ：
F Pressing ＝F 1 /K
Wherein K is a static friction coefficient;
determining the pressed offset L of the friction wheel according to the installation state of the friction wheel and the width of the electric locomotive;
when the friction wheel receives the extrusion force F Pressing During the process, the rocker arm and the hydraulic push rod swing and the extrusion force F Pressing Is decomposed to two sides of the rocker arm, respectively, is pressed to the mounting plate under the pressure F x And a pressure F pressing against the hydraulic ram s ；
Determining the pressed offset D of the friction wheel according to the installation position of the friction wheel and the width of the vehicle body; according to the extrusion force F Pressing The arm length H and the pressed offset D of the rocker arm, and the pressure F pressed towards the mounting plate is solved x The method comprises the following steps:
the rocker arm deflection angle is determined as follows:
θ＝sin -1 (D/H)
the included angle formed by connecting lines of end points at two ends of the rocker arm and the mounting plate is determined as follows:
the included angle formed by the connecting line of the two end points of the rocker arm and the end part of the hydraulic push rod is as follows:
according to sine law:
F x /sinθ′＝F s /sin 45°
pressure F against the hydraulic ram s ：
F s ＝F x /sinθ′·sin 45°
When the hydraulic push rods are subjected to pressure and the hydraulic push rods need to generate the same reaction force, each hydraulic push rod executes thrust force F s Output motor power P of each driving motor 1 And each hydraulic push rod performs thrust force F s 。
Preferably, the total power P is distributed to the motor power P of the driving motor where each friction wheel is located 1 Comprising the following steps:
calculating the maximum total friction tension force F=mg according to the maximum load m of the electric locomotive;
determining the linear velocity of the friction wheel, i.e. the passing velocity V of the electric locomotive 1 And determining the total motor power P based on the maximum total friction pull Total (S) ＝FV；
According to the limit power P of a single motor Forehead (forehead) Passing speed V of electric locomotive 1 And rated speed V of the electric locomotive, obtaining driving power of each friction wheel, namely motor power P of a driving motor 1 ：
P 1 ＝V 1 /V*P Total (S) 。
The invention has the beneficial effects that:
the invention provides a power-assisted driving device and a power-assisted driving method for a railway locomotive ore discharging station, which adopt four power-assisted friction wheels to be matched with hydraulic push rod equipment, so that the aim of stably passing through the ore discharging station is fulfilled. The power-assisted drive reduces the unloading speed, the electric locomotive can pass through the unloading station at a constant speed, the vibration acceleration of the electric locomotive is reduced by one order of magnitude when the electric locomotive passes through the unloading station, the impact of the electric locomotive, the mine car and the unloading station track is reduced, the stability of unloading of the locomotive is greatly improved, and the safety of equipment is protected. Meanwhile, the power-assisted driving device of the unloading station is adopted, so that the service lives of the electric locomotive, the mine car and the unloading station are greatly prolonged, the maintenance and repair cost of equipment can be reduced, the maintenance workload and the spare part consumption of the equipment are reduced, the operation cost is reduced, the maintenance period is prolonged and the transportation efficiency is improved on the premise of improving the safety.
Drawings
FIG. 1 is a block diagram of an assisted drive device for a rail locomotive unloading station according to an embodiment of the present invention;
FIG. 2 is a chart illustrating friction wheel force analysis according to an embodiment of the present invention.
Wherein, 1, mounting plate; 2. a rocker arm; 3. a hydraulic push rod; 4. friction wheel.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The power-assisted driving device for the unloading station of the rail locomotive comprises four mounting plates 1 and four groups of driving units which are symmetrically arranged as shown in fig. 1-2; the mounting plates 1 are arranged on two sides of the ore discharging station and are perpendicular to the movement direction of the electric locomotive; each group of drive units comprises a rocker arm 2, a telescopic group, a rotary drive assembly and a friction wheel 4. The rocker arm 2 is of an L-shaped structure; one end of the rocker arm 2 is hinged with the mounting plate 1 through a first rotating seat; the first rotating seat is provided with a swing detection switch; the end part of the telescopic component is hinged with the mounting plate 1 through a second rotating seat; the telescopic end of the telescopic component is hinged with the other end of the rocker arm 2; the rotary driving component is fixedly arranged in the center of the rocker arm 2; the wheel axle of the friction wheel 4 is fixedly connected with the output end of the rotary driving assembly. When the electric locomotive passes through, the locomotive body extrudes the friction wheel 4, the rocker arm 2 swings to trigger the swing detection switch, the rotary driving assembly drives the friction wheel 4 to rotate to provide power, and the telescopic assembly stretches to provide supporting force so as to increase the friction force between the friction wheel 4 and the locomotive body.
Further, the telescopic component is a hydraulic push rod 3; the end part of the hydraulic push rod 3 is hinged with the mounting plate 1 through a second rotating seat, and the telescopic end of the hydraulic push rod is hinged with the other end of the rocker arm 2. The rotary driving component is a driving motor; the driving motor is fixedly arranged at the center of the rocker arm 2, and an output shaft of the driving motor is fixedly connected with the wheel shaft of the friction wheel 4. The outer edge of the friction wheel 4 is made of rubber.
The driving design of the power-assisted driving device of this embodiment includes the following steps:
in this embodiment, the assistanceThe force driving device provides the electric locomotive with speed driving force through the unloading station according to the ore density of 3.96t/m 3 And the loosening coefficient is 1.6, the power-assisted driving device is selected, the unloading station pulls the pushing device, and the power-assisted driving device is driven and calculated according to the driving force 14T electric locomotive.
(1) Basic parameters
The method is applicable to: 6 cube bottom side dump car, overall dimension: 4098mm x 180mm x 1810mm; wing panel height: 1071mm; width of wing plate: 300mm; track width: 900mm; maximum load: 14T; train passing speed: 4km/h; the electric locomotive operates at normal full speed and adopts double motor dragging to 52KW with 2=102 KW.
(2) Friction wheel selection
Considering that the friction driving electric locomotive is adopted in the embodiment, a large friction coefficient is required, so that a rubber tire (friction coefficient k=0.8) is selected as the outer edge of the friction wheel, and the diameter d of the friction wheel is 700mm. The intent is to employ standard automobile hubs and tires.
(3) Motor selection
And (3) calculating motor power:
(1) method 1
Depending on 102KW as a basis, when power-assisted driving is adopted, the maximum driving motor power when being distributed to 4 friction wheels is as follows:
P＝102KW/4＝25.5KW
the rated running speed of the locomotive is as follows: v=20 Km/h, the speed at which the ore is unloaded at the unloading station is: v (V) 1 =4 km/h; from this speed, the driving power P of each friction wheel is calculated 1 ＝V 1 /V*P＝4/20*25.5＝5.1KW。
(2) Method 2
Maximum friction pull f=mg=14t×9.8m/s 2 ＝14000Kg*9.8＝137200N；
Friction wheel linear velocity v=train passing velocity v=4 km/h=1.11 m/s;
total motor power: p (P) Total (S) ＝FV＝137200N*1.11m/s＝150920W＝150.92KW；
Single motor limit power: p= 150.92 KW/4=37.7 KW;
calculating the driving power of each friction wheel according to the speedP 1 ＝V 1 V=4/20×37.7=7.5 KW; according to the calculation results of the method 1 and the method 2, the embodiment selects a larger motor power for calculation, and selects a 7.5KW motor with a polarity of 380V 6 and a rotation speed of 900 rpm.
(4) Reduction ratio calculation
Setting the diameter d of the friction wheel to be 700mm;
friction wheel linear velocity v=train passing velocity v=4 km/h=1.11 m/s;
friction wheel angular velocity w=v/(0.7×3.14) =0.5 r/s;
angular velocity w of motor 1 =900 rpm=15 r/s;
therefore, the reduction ratio is: k=15/0.5=30:1;
(5) Frequency converter selection
The embodiment adopts a scheme of 1 drop 4, and realizes that 1 frequency converter has 4 motors. Frequency converter power P Variable ＝P 1 *4＝7.5KW*4＝30KW。
(6) Hydraulic push rod
Maximum total friction pull f=mg=14t9.8m/s 2 ＝14000Kg*9.8＝137200N；
Each friction wheel F 1 ＝F/4＝137200N/4＝32400N；
Meanwhile, each large friction pull force:
F pressing ＝F 1 /K＝32400N/0.8＝42875N
K is the static friction coefficient of rubber and cast iron, and is 0.8.
The following is a force analysis after the friction wheel is pressed and offset D is 100mm, wherein the arm length H of the rocker arm is 500mm.
The specific stress analysis is shown in FIG. 2, when the friction wheel is subjected to the extrusion force F of the electric locomotive Pressing When the friction wheel is deflected to the left by taking the E point as the axle center, the triangle OBE is a rocker arm, and the stress F is applied Pressing Is resolved into the rocker arm sides, OB and OE directions. Force in OB direction F x The method is characterized by comprising the following steps:
the rocker arm deflection angle is as follows:
θ＝sin -1 (D/H)＝arcsin(100/500)；
the contained angle that both ends extreme point line and mounting panel formed of rocking arm is:
the included angle formed by the connecting line of the two end points of the rocker arm and the end part of the hydraulic push rod is as follows:
and then according to sine law:
F x /sinθ′＝F s /sin 45°
pressure F against the hydraulic ram s ：
F s ＝F x /sinθ′·sin 45°＝1.025*F x ＝1.025*42875N＝43956N
This is the force to which the booster device is not subjected to any frictional slip while the locomotive is running the load 14T.
When the hydraulic push rods are subjected to pressure and the hydraulic push rods need to generate the same reaction force, each hydraulic push rod executes thrust force F s Output motor power P of each driving motor 1 And each hydraulic push rod performs thrust force F s 。
In the embodiment, the power-assisted driving reduces the unloading speed, the electric locomotive can uniformly pass through the unloading station, the vibration acceleration of the electric locomotive is reduced by one order of magnitude when the electric locomotive passes through the unloading station, the impact of the electric locomotive, the mine car and the track of the unloading station is reduced, the stability of unloading of the locomotive is greatly improved, and the safety of equipment is protected. Meanwhile, the power-assisted driving device of the unloading station is adopted, so that the service lives of the electric locomotive, the mine car and the unloading station are greatly prolonged, the maintenance and repair cost of equipment can be reduced, the maintenance workload and the spare part consumption of the equipment are reduced, the operation cost is reduced, the maintenance period is prolonged and the transportation efficiency is improved on the premise of improving the safety.
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, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The power-assisted driving device of the unloading station of the rail locomotive is characterized by comprising four mounting plates (1) and four groups of driving units which are symmetrically arranged; the mounting plates (1) are erected on two sides of the ore discharging station and are perpendicular to the movement direction of the electric locomotive; each set of the driving units includes:
a rocker arm (2), an L-shaped structure; one end of the rocker arm (2) is hinged with the mounting plate (1) through a first rotating seat; the first rotating seat is provided with a swing detection switch;
the end part of the telescopic component is hinged with the mounting plate (1) through a second rotating seat; the telescopic end of the telescopic component is hinged with the other end of the rocker arm (2);
the rotary driving assembly is fixedly arranged in the center of the rocker arm (2);
the wheel shaft of the friction wheel (4) is fixedly connected with the output end of the rotary driving assembly;
when the electric locomotive passes through, the locomotive body extrudes the friction wheel (4), the swing arm (2) swings to trigger the swing detection switch, the rotary driving assembly drives the friction wheel (4) to rotate to provide power, and the telescopic assembly stretches to provide supporting force so as to increase the friction force between the friction wheel (4) and the locomotive body.
2. The power-assisted driving device of a track locomotive unloading station according to claim 1, wherein the telescopic component is a hydraulic push rod (3); the end part of the hydraulic push rod (3) is hinged with the mounting plate (1) through a second rotating seat, and the telescopic end of the hydraulic push rod is hinged with the other end of the rocker arm (2).
3. The rail locomotive ore discharge station booster drive of claim 2, wherein the rotary drive assembly is a drive motor; the driving motor is fixedly arranged at the center of the rocker arm (2), and an output shaft of the driving motor is fixedly connected with the wheel shaft of the friction wheel (4).
4. The power-assisted driving device of the track locomotive ore discharging station according to claim 1, wherein the outer edge of the friction wheel (4) is made of rubber.
5. A method of driving a rail vehicle unloading station booster drive according to any one of claims 3 to 4, comprising the steps of:
determining total power P dragged by double motors in normal full-speed operation of the electric locomotive, and distributing the total power P to motor power P1 of a driving motor where each friction wheel (4) is positioned;
calculating the maximum total friction force F=mg according to the maximum load m of the electric locomotive, and then the maximum friction force F of each friction wheel (4) 1 The method comprises the following steps:
F 1 ＝F/4
obtaining the extrusion force F of each friction wheel (4) to the vehicle body according to the maximum friction pulling force of each friction wheel (4) Pressing ：
F Pressing ＝F 1 /K
Wherein K is a static friction coefficient;
determining the pressed offset L of the friction wheel (4) according to the installation state of the friction wheel (4) and the width of the electric locomotive;
when the friction wheel (4) receives the extrusion force F Pressing During the process, the rocker arm (2) and the hydraulic push rod (3) swing and press force F Pressing Is decomposed to two sides of the rocker arm (2), respectively is the pressure F pressed against the mounting plate (1) x And a pressure F pressing against the hydraulic ram (3) s ；
Determining the pressed offset D of the friction wheel (4) according to the installation position of the friction wheel (4) and the width of the vehicle body; according to the extrusion force F Pressing Solving the pressure F of the rocker arm (2) towards the mounting plate (1) by the arm length H and the pressed offset D x The method comprises the following steps:
the deflection angle of the rocker arm (2) is determined as follows:
θ＝sin -1 (D/H)
the included angle formed by connecting wires of two end points of the rocker arm (2) and the mounting plate (1) is determined as follows:
the included angle formed by the connecting line of the two end points of the rocker arm (2) and the end part of the hydraulic push rod (3) is as follows:
according to sine law:
F x /sinθ′＝F s /sin 45°
the pressure F pressing against the hydraulic ram (3) s ：
F s ＝F x /sinθ′·sin 45°
When the hydraulic push rods are subjected to pressure and the same reaction force needs to be generated by the hydraulic push rods, each hydraulic push rod (3) executes thrust force F s Output motor power P of each driving motor 1 And each hydraulic push rod (3) performs thrust force F s 。
6. The method for driving a booster drive device for a rail vehicle unloading station according to claim 5, characterized in that the total power P is distributed to the motor power P of the drive motor in which the respective friction wheel (4) is located 1 Comprising the following steps:
calculating the maximum total friction tension force F=mg according to the maximum load m of the electric locomotive;
determining the linear speed of the friction wheel (4), i.e. the passing speed V of the electric locomotive 1 And determining the total motor power P based on the maximum total friction pull Total (S) ＝FV；
According to a single motorLimit power P Forehead (forehead) Passing speed V of electric locomotive 1 And rated speed V of the electric locomotive, obtaining driving power of each friction wheel, namely motor power P of a driving motor 1 ：
P 1 ＝V 1 /V*P Total (S) 。
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| CN219728171U (en) * | 2023-01-10 | 2023-09-22 | 湖南中矿金禾机器人研究院有限公司 | Driving distributed rail train system for mine bulk cargo transportation |
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