Rail mortar vehicle and electro-hydraulic double-stirring system

Abstract

The utility model discloses a track mortar vehicle and an electro-hydraulic double-stirring system, and belongs to the technical field of mortar vehicles. The electro-hydraulic double-stirring system comprises a mortar tank, a stirring structure, an electric driving system and a hydraulic driving system; the hydraulic driving system comprises an axle power take-off gearbox, a transmission shaft, a first clutch, a hydraulic transmission device, a hydraulic motor and a second speed reducer, the axle power take-off gearbox is in transmission connection with the axle and is in transmission connection with the hydraulic transmission device through the transmission shaft, the transmission shaft is provided with the first clutch, and the hydraulic transmission device drives the hydraulic motor; the hydraulic motor is in transmission connection with the second speed reducer and is a constant displacement hydraulic motor; a stirring shaft of the stirring structure penetrates through the mortar tank, one end is in transmission connection with the electric driving system through a third clutch, and the other end is in transmission connection with a second speed reducer through a second clutch; the electric driving system works when the mortar vehicle does not move; the hydraulic drive system works when the speed of the mortar vehicle exceeds the starting speed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mortar car technical field, especially related to a track mortar car and electro -hydraulic double stirring system. BACKGROUND

[0002] In engineering tunnel, subway shield and so on construction operation, mortar car is used widely as the tool of transporting mortar. In order to prevent the slurry from depositing and solidifying in the transportation process, the kinetic energy of transport vehicle is needed, and the slurry is stirred constantly, so that the activity of the slurry can be maintained, and the construction technical requirements can be met.

[0003] In the prior art, the motor is usually used to stir the mortar car. For example, the patent with the application number CN201821058726.0 discloses an internal transmission track mortar car, which comprises a mortar car box body, a motor drive speed reducer is fixed to the top end of the mortar car box body, a driving shaft is rotatably connected to the motor drive speed reducer, a transmission assembly is rotatably connected to the driving shaft in the vertical direction, and a stirring assembly is connected to the end of the transmission assembly in the mortar car box body.

[0004] For the track mortar car driven by the motor, the stirring system will consume the power of the motor head and reduce the mileage. If the battery is increased, the cost will be high (the price of the storage battery is relatively high) and the weight will be obviously increased (the battery itself, the battery protection structure and the battery management structure, etc. In order to ensure the construction safety, the weight of the battery protection structure is large). In addition, the electric drive has the problems of complex wiring (a motor head may carry multiple track mortar cars, and the track mortar cars need to be connected with the motor head through cables. In addition, the track mortar cars need to be detachably connected with each other and with the motor head, and accordingly, the cables also need to be detachably connected, which further complicates the structure), and is prone to accidents (such as electric shock or fire). INVENTION CONTENTS

[0005] The utility model embodiment provides a track mortar car and electro -hydraulic double stirring system, and the stirring system can obviously reduce the power consumption of the track mortar car and improve the mileage. The technical scheme is as follows:

[0006] In one aspect, the utility model discloses a kind of electro-hydraulic double stirring systems, the system includes mortar tank 3, stirring structure 4 in mortar tank 3, the electric drive system 5 for driving stirring structure 4 in one end of mortar tank 3 and the hydraulic drive system of another end of mortar tank 3;The hydraulic drive system includes axle power take-off speed increasing box 6, transmission shaft 7, first clutch 11, hydraulic transmission device, hydraulic motor 9 and second speed reducer 10, the axle power take-off speed increasing box 6 is transmission connection with the axle of mortar truck and its through transmission shaft 7 with hydraulic transmission device transmission connection, first clutch 11 is equipped on the transmission shaft 7, hydraulic transmission device drives hydraulic motor 9, hydraulic motor 9 is transmission connection with second speed reducer 10, and hydraulic motor 9 is constant delivery hydraulic motor;The stirring shaft of stirring structure 4 penetrates mortar tank 3, and its one end is transmission connection with electric drive system 5 by third clutch 13, and its other end is transmission connection with the output shaft of second speed reducer 10 by second clutch 12;The electric drive system 5 works when mortar truck is not moving, at this time, third clutch 13 is combined, and second clutch 12 is disconnected;The hydraulic drive system works when the speed of mortar truck exceeds start speed, at this time, first clutch 11 is combined, and second clutch 12 is combined, and third clutch 13 is disconnected;When mortar truck moves and mortar truck is empty, first clutch 11 is disconnected;When the speed of mortar truck is less than or equal to start speed, first clutch 11 is disconnected;Wherein, hydraulic transmission device can only normally work when the speed of mortar truck is greater than start speed.

[0007] Among them, the combination mode of first clutch 11 in the utility model embodiment is power-on combination, and it is disconnected or combined by control strategy, the combination mode of second clutch 12 is power-off combination, and the combination mode of third clutch 13 is power-on combination.

[0008] Among them, the hydraulic transmission device in the utility model embodiment includes hydraulic oil tank 14, two-position three-way solenoid valve 15, vane pump 16, energy accumulator 17 and two direct-acting overflow valves 18;The vane pump 16 is transmission connection with transmission shaft 7, and its input end is connected with hydraulic oil tank 14 by pipeline;The output end of vane pump 16 is output in two ways, one way is connected with the inlet of hydraulic motor 9 by pipeline, and the other way is connected with one inlet of two-position three-way solenoid valve 15 by pipeline;The outlet of hydraulic motor 9 is connected with the other inlet of two-position three-way solenoid valve 15 by pipeline, the outlet of two-position three-way solenoid valve 15 is connected with hydraulic oil tank 14 by pipeline, the energy accumulator 17 is arranged on the pipeline between vane pump 16 and hydraulic motor 9, and the inlet and outlet of hydraulic motor 9 are connected with hydraulic oil tank 14 by pipeline with direct-acting overflow valve 18 respectively.

[0009] Further, the hydraulic transmission device in the embodiment of the utility model still includes air filter 19, liquid level meter 20, thermometer 21, heater 22, magnetic filter 23, differential pressure gauge 24, cooler 25 and pressure sensor 26, air filter 19, liquid level meter 20, thermometer 21 and heater 22 are equipped on hydraulic oil tank 14, magnetic filter 23 and cooler 25 are equipped on the pipeline between the outlet of two-position three-way solenoid valve 15 and hydraulic oil tank 14, the two detection ends of differential pressure gauge 24 are connected with the import and export of magnetic filter 23 through pipeline respectively, pressure sensor 26 is equipped on the pipeline between vane pump 16 and hydraulic motor 9.

[0010] Further, the electro-hydraulic double stirring system in the embodiment of the utility model further comprises a control system, the control system comprises an electrical cabinet, a charging module, an electric energy conversion module, a storage battery, a control and execution module and a stirring speed sensor, output ends of the electrical cabinet are electrically connected with the charging module, the electric energy conversion module and the electric drive system 5 respectively, an output end of the electric energy conversion module is electrically connected with the control and execution module, the first clutch 11, the second clutch 12 and the third clutch 13, the charging module is electrically connected with an input end of the storage battery, an output end of the storage battery is electrically connected with the control and execution module, and the control and execution module is electrically connected with a control end of the first clutch 11, the stirring speed sensor and the hydraulic transmission device.

[0011] Specifically, the hydraulic transmission device in the embodiment of the utility model reaches rated power when the speed of the mortar truck is rated speed, the theoretical calculation average power of the hydraulic drive system is 70-80% of the theoretical calculation average power of the electric drive system 5, the starting speed is 3km / h, the rated speed is 5km / h, the running speed of the mortar truck is 5-8km / h, and the output rotating speed of the axle power take-off speed increasing box 6 is greater than or equal to 600rpm.

[0012] On the other hand, the embodiment of the utility model further provides a track mortar truck, which comprises a vehicle body 1, a plurality of walking parts 2 at the bottom of the vehicle body 1 and the aforementioned electro-hydraulic double stirring system, the mortar tank 3 is arranged on the vehicle body 1, and the axle power take-off speed increasing box 6 is in driving connection with the axle of the nearby walking part 2.

[0013] Specifically, the other end lower part of the mortar tank 3 in the embodiment of the utility model is provided with a support 8, the second speed reducer 10 is arranged on the support 8, and the hydraulic motor 9 is arranged on the upper side of the second speed reducer 10; the vane pump 16, the hydraulic oil tank 14 and the cooler 25 are all arranged on the vehicle body 1 and below the support 8, and the hydraulic oil tank 14 and the cooler 25 are arranged side by side in the width direction of the vehicle body 1 and on the side of the vane pump 16 away from the mortar tank 3.

[0014] Further, the track mortar car in the embodiment of the utility model further includes a mortar outlet device, and the mortar outlet device and the hydraulic drive system are located at one end of the mortar tank 3 far from the car head.

[0015] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0016] (1) Compared with electric stirring, the power consumption is small (theoretically calculated as 70-80% of the electric drive system (considering uphill and downhill)), especially in the downhill stage, the power consumption is zero, which can greatly reduce energy consumption.

[0017] (2) For electric cars, compared with the prior art, the patent can reduce the locomotive reserve power consumption, ensure the endurance mileage of the electric locomotive, and the increased weight of the hydraulic drive system is less than the increased weight of the battery. For internal combustion cars (which also need to carry more fuel), an external generator must be equipped, which will increase the weight of the internal combustion car, which will inevitably increase the engine power, so the manufacturing cost and use cost of the whole vehicle will increase to a certain extent.

[0018] (3) When the track mortar car is downhill, the hydraulic drive system consumes the gravity of the track mortar car, which can be understood as zero consumption of the locomotive head; at the same time, it can also be understood as resistance (equivalent to damping) to avoid the speed of the track mortar car being too fast, to ensure the stable speed of the track mortar car, and to reduce the use of brakes (which also consume power). The greater the track height changes, the more obvious the advantages of the system will be.

[0019] (4) Avoiding the wiring of the cable (usually 380V), simplifying the structure, avoiding the risk of electric shock and fire.

[0020] (5) The stirring speed of the hydraulic drive system is stable and will not change with the change of the running speed of the track mortar car.

[0021] (6) The hydraulic drive system can be provided at the same end as the mortar outlet device, and the space beside the mortar outlet device is used, without the need for additional installation space.

[0022] In summary, the stirring system can significantly reduce the power consumption of the track mortar car and improve the mileage. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic diagram of the track mortar car provided by the embodiment of the utility model;

[0024] Fig. 2 is a principle diagram of the hydraulic transmission device;

[0025] Fig. 3 is a principle block diagram of the control system.

[0026] In the figure: 1 vehicle body, 2 walking part, 3 mortar tank, 4 stirring structure, 5 electric drive system, 6 axle power take-off speed increasing box, 7 transmission shaft, 8 support, 9 hydraulic motor, 10 second speed reducer, 11 first clutch, 12 second clutch, 13 third clutch, 14 hydraulic oil tank, 15 two-position three-way electromagnetic valve, 16 vane pump, 17 accumulator, 18 direct-acting overflow valve, 19 air filter, 20 liquid level gauge, 21 thermometer, 22 heater, 23 magnetic filter, 24 differential pressure gauge, 25 cooler, 26 pressure sensor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described further in detail below with the drawings.

[0028] Example 1

[0029] Referring to Figs. 1-3 , example 1 provides an electro-hydraulic double stirring system, which comprises a mortar tank 3, a stirring structure 4, an electric drive system 5 and a hydraulic drive system etc. The electric drive system 5 and the hydraulic drive system are respectively arranged at two ends of the mortar tank 3, and they selectively drive or do not drive the stirring structure 4. The electric drive system 5 comprises a driving motor and a first speed reducer etc.

[0030] Among them, the hydraulic drive system comprises an axle power take-off speed increasing box 6, a transmission shaft 7, a first clutch 11, a hydraulic transmission device, a hydraulic motor 9, a second speed reducer 10 and a control system etc. The axle power take-off speed increasing box 6 is in transmission connection with the axle of the mortar truck, and it is in transmission connection with the hydraulic transmission device through the transmission shaft 7, and it is used for increasing speed (the track mortar truck runs very slowly) to reach the minimum speed of the hydraulic transmission device. The transmission shaft 7 is provided with the first clutch 11, the hydraulic transmission device drives the hydraulic motor 9, the hydraulic motor 9 is in transmission connection with the second speed reducer 10, and the hydraulic motor 9 is a constant displacement hydraulic motor. The stirring structure 4 is arranged in the mortar tank 3, the stirring shaft thereof penetrates the mortar tank 3, one end thereof is in transmission connection with the electric drive system 5 through the third clutch 13, and the other end thereof is in transmission connection with the output shaft of the second speed reducer 10 through the second clutch 12. The first clutch 11 is combined in the mode of power-on combination, and it is disconnected or combined through a control strategy, the second clutch 12 is combined in the mode of power-off combination, and the third clutch 13 is combined in the mode of power-on combination. The first clutch 11 is disconnected according to needs (such as low speed, no load etc.), so as to reduce the influence on the hydraulic transmission device.

[0031] The electric drive system 5 works when the mortar truck is stationary, at which time the third clutch 13 is engaged and the second clutch 12 is disconnected. The hydraulic drive system works when the speed of the mortar truck exceeds the starting speed, at which time the first clutch 11 is engaged, the second clutch 12 is engaged, and the third clutch 13 is disconnected. The first clutch 11 is disconnected when the mortar truck is moving and the mortar truck is empty. The first clutch 11 is disconnected when the speed of the mortar truck is less than or equal to the starting speed. The first clutch 11 is disconnected in other situations where stirring is not required. The hydraulic transmission device can only work normally when the speed of the mortar truck is greater than the starting speed.

[0032] The hydraulic transmission device includes a hydraulic oil tank 14, a two-position three-way electromagnetic valve 15, a vane pump 16, an accumulator 17, two direct-acting overflow valves 18, an air filter 19, a liquid level meter 20, a thermometer 21, a heater 22, a magnetic filter 23, a differential pressure meter 24, a cooler 25, and a pressure sensor 26. The vane pump 16 is in transmission connection with the transmission shaft 7 and has an input end connected with the hydraulic oil tank 14 through a pipeline. The output end of the vane pump 16 is divided into two paths, one of which is connected with the inlet of the hydraulic motor 9 through a pipeline, and the other of which is connected with one inlet of the two-position three-way electromagnetic valve 15 through a pipeline. The outlet of the hydraulic motor 9 is connected with the other inlet of the two-position three-way electromagnetic valve 15 through a pipeline, and the outlet of the two-position three-way electromagnetic valve 15 is connected with the hydraulic oil tank 14 through a pipeline. The accumulator 17 is arranged on the pipeline between the vane pump 16 and the hydraulic motor 9, and the inlet and the outlet of the hydraulic motor 9 are respectively connected with the hydraulic oil tank 14 through pipelines provided with the direct-acting overflow valves 18. The air filter 19, the liquid level meter 20, the thermometer 21, and the heater 22 are arranged on the hydraulic oil tank 14, the magnetic filter 23 and the cooler 25 are arranged on the pipeline between the outlet of the two-position three-way electromagnetic valve 15 and the hydraulic oil tank 14, the two detection ends of the differential pressure meter 24 are respectively connected with the inlet and the outlet of the magnetic filter 23 through pipelines, and the pressure sensor 26 is arranged on the pipeline between the vane pump 16 and the hydraulic motor 9. The stirring direction is controlled by controlling the two-position three-way electromagnetic valve 15.

[0033] In the patent, the axle speed fluctuates greatly with the increase and decrease of the vehicle speed, which has an adverse effect on the hydraulic drive. Therefore, a fixed displacement motor (cooperating with other structures) is adopted in the hydraulic drive part, which adjusts the torque and speed required for stirring, and the subsequent stirring speed is not affected by the vehicle speed. At the same time, the accumulator is added to the pipeline, which can effectively avoid the damage of the hydraulic components caused by the impact during gear shifting.

[0034] Further, the control system in the embodiment of the utility model includes electrical cabinet, charging module, electric energy conversion module, battery, control and execution module and stirring speed sensor etc., control and execution module includes PLC and execution unit, processing unit etc.. The output end of electrical cabinet is connected with charging module, electric energy conversion module and electric drive system 5 respectively, the output end of electric energy conversion module is connected with control and execution module, first clutch 11, second clutch 12 and third clutch 13, charging module is connected with the input end of battery, the output end of battery is connected with control and execution module, control and execution module is connected with the control end of first clutch 11 (provides power for first clutch 11 simultaneously), stirring speed sensor and hydraulic transmission device (provides power for the electric control unit and sensor etc. in it, such as two-position three-way electromagnetic valve 15, pressure sensor 26 etc.).

[0035] Specifically, the hydraulic transmission device in the embodiment of the utility model reaches rated power when the speed of the mortar car is rated speed, and the theoretical calculation average power of the hydraulic drive system (calculated at 50% uphill) is 70-80% of the theoretical calculation average power of the electric drive system 5. Among them, the starting speed is 3km / h, and the rated speed is 5km / h. Then the running speed of the mortar car is 5-8km / h; the output speed of the axle power take-off speed increasing box 6 is greater than or equal to 600rpm. The stirring structure 4 is an anchor type blade stirring structure, the impeller diameter Di is 1.0-1.2m (corresponding to the tank body diameter Dt of 1.38m and the depth of 4.2m), and the segment number is 2.

[0036] Embodiment 2

[0037] Embodiment 2 provides a track mortar car, which comprises a vehicle body 1, a mortar output device (outputting mortar outward), a plurality of (specifically two) walking parts 2 at the bottom of the vehicle body 1, and the electro-hydraulic double stirring system disclosed in embodiment 1, etc. The mortar tank 3 is arranged on the vehicle body 1, and the axle power take-off speed increasing box 6 is in transmission connection with the axle of the walking part 2 nearby. The mortar output device and the hydraulic drive system are both located at the end of the mortar tank 3 far from the vehicle head (both of which will occupy a large space).

[0038] Specifically, the other end lower part of the mortar tank 3 in the embodiment of the utility model is provided with a support 8, the second speed reducer 10 is arranged on the support 8, and the hydraulic motor 9 is arranged on the upper side of the second speed reducer 10. The vane pump 16, the hydraulic oil tank 14 and the cooler 25 are all arranged on the vehicle body 1 and below the support 8, and the hydraulic oil tank 14 and the cooler 25 (both of which occupy a large space, and other structures are arranged according to space requirements) are arranged side by side in the width direction of the vehicle body 1 and on the side of the vane pump 16 far from the mortar tank 3.

[0039] Embodiment 3

[0040] The embodiment 3 provides a track mortar truck, which is basically identical with the structure of the embodiment 2, and the difference is that the vehicle body 1 is arranged along the front-rear direction, the mortar tank 3 is arranged along the front-rear direction, the electric driving system 5 is arranged at the front end of the mortar tank 3, the hydraulic driving system is arranged at the rear end of the mortar tank 3, the transmission shaft 7 is arranged along the front-rear direction, the vane pump 16 is arranged directly below the support 8, the hydraulic oil tank 14 and the cooler 25 are arranged side by side and are arranged at the rear of the vane pump 16 and are arranged at the rear end of the vehicle body 1, and the axle power take-off speed increasing box 6 is in transmission connection with the axle of the rear end walking part 2.

[0041] Embodiment 4

[0042] The embodiment 4 provides a track mortar truck, which is basically identical with the structure of the embodiment 2, and the difference is that the stirring structure 4 in the embodiment is an anchor type vane stirring structure, the theoretical calculation power of the hydraulic driving system is 4.72KW, and the power of the electric driving system is 6.29KW.

[0043] I. Design and power of the stirring structure 4

[0044] 1.1 Selection of the stirring structure 4

[0045] The anchor type impeller is cheaper than the propeller impeller, the anchor type impeller consumes only about 2 / 3 of the power of the propeller impeller with the same diameter and number of revolutions. According to the use condition, the ratio of the impeller diameter to the tank diameter is 0.7-0.9 for stirring low viscosity fluid, and is 0.8-0.95 for stirring high viscosity fluid. The suitable number of revolutions ranges from 10 to 50 r / min, and the viscosity range ranges from low viscosity to 200-300 Pa.s.

[0046] 1.2 Design of the stirring impeller

[0047] In addition to selecting the impeller shape meeting the stirring purpose, the impeller diameter, the number of sections and the impeller mounting position and other conditions also need to be considered. If these conditions are not properly considered, the stirring effect will be seriously affected.

[0048] 1.3 Design of the impeller diameter

[0049] When designing the impeller diameter, according to the similar condition of geometry, the ratio of the impeller diameter to the stirring tank diameter can be considered. If the ratio is lower than the lower limit of the range, local flow unevenness will occur, and serious stirring dead angle will occur.

[0050] The impeller diameter Di adopts the posture closely combined with the tank body, the tank body diameter Dt is 1.38 m, and the impeller diameter Di is 1.1 m, which meets the design condition of the anchor type impeller.

[0051] 1.4 Section number design

[0052] The number of stages of the impeller is related to the ratio of the liquid depth in the tank to the diameter of the tank, and it is generally desired that the ratio of the liquid depth to the diameter of the tank be 1 ± 0.2. At this ratio, if it is a low viscosity fluid, then one stage of the impeller is sufficient. In the case where the ratio of the liquid depth to the diameter of the tank is outside this range, one stage can be added. However, in the case of a fluid having a viscosity of several Pascal seconds, even at this ratio, the flowability deteriorates due to the increase in viscosity, and two stages are required. In the case of a fluid having a viscosity above this, three stages or an appropriate number of stages are required. When the viscosity and the relative density of the liquid to be agitated differ greatly, in addition to the installation position of the impeller, the number of stages of the impeller must also be considered.

[0053] The designed depth of the agitator tank is 4.2 m, the ratio of the liquid depth in the tank to the diameter of the tank is about 3, and the designed number of stages is 2.

[0054] 1.5 Specifications of the Agitated Medium:

[0055] The present track mortar vehicle is mainly used for synchronous grouting construction in subway shield construction, the agitated medium is mixed according to the proportion provided by the construction unit on site, the density d of the agitated medium is 1850 kg / m 3 , the mortar sand ratio should be about 1:2, and the viscosity μ of the agitated medium is 250 mPa.s.

[0056] 1.6 Calculation of Agitation Power:

[0057] After the shape, diameter and number of revolutions of the impeller are determined, the power required for agitation can be calculated, and the agitation power is calculated by the following formula:

[0058] Formula 1:

[0059] In the formula, H is the liquid depth (m) - 4.2 m;

[0060] Dt is the diameter of the agitator tank (m) - 1.38 m;

[0061] Di is the diameter of the impeller (m) - 1.1 m;

[0062] b is the width of the impeller blade (m) - 0.625 m [(one blade width (0.125 m) x number of blades (5) x number of stages (2) / 2];

[0063] θ is the installation angle of the blade - 30°;

[0064] d is the density of the agitated medium - 1850 kg / m 3 ;

[0065] μ is the viscosity of the agitated medium - 250 mPa.s;

[0066] g is the conversion coefficient of gravity - 9.8 m / s 2 ;

[0067] n - revolution speed - 12 r / min;

[0068] Np - power number;

[0069] Re - Reynolds number;

[0070] PA - stirring power;

[0071] PB - motor driving power;

[0072] Z - total efficiency, generally 0.75;

[0073] Np is affected by impeller shape, geometry, and baffle condition, and is a function of Reynolds number Re. The stirring Reynolds number Re can be given by the following formula:

[0074] Formula 2:

[0075] Re = 1.79 is calculated.

[0076] When there is no baffle and Re < 300, the calculation of NP value can be calculated by the following formula:

[0077] Nagata formula

[0078]

[0079] Where:

[0080] NP = 63.74 is calculated.

[0081] Substituting formula 1, the stirring power PA = 4.72 KW can be obtained.

[0082] II. Calculation of power of hydraulic drive system:

[0083] 2.1 Calculation of hydraulic motor displacement:

[0084] According to the principle that the output torque of the second speed reducer is equal to the output torque of the first speed reducer and the low-speed stirring during transportation, the output torque of the second speed reducer is 6000 N.m. When the speed of the locomotive is 3 km / h, the minimum working speed of the hydraulic pump is reached, and when the speed is 5 km / h, the rated working speed is reached. The long-term running speed of the locomotive is 5-8 km / h.

[0085] The reduction ratio of the second speed reducer is the same as that of the first speed reducer, which is 120:1, and the input torque of the speed reducer (i.e. the output torque of the motor) can be obtained:

[0086] T0 = 6000 / 120 = 50 N.m;

[0087] According to the setting, the minimum output speed of the stirring shaft is 6 rpm (vehicle speed 5 km / h), so the input speed of the reducer (i.e. the output speed of the motor) is:

[0088] n in = 6 x 120 = 720 rpm.

[0089]

[0090] In the above formula: p = 16 MPa

[0091] ηm= 90%

[0092] Thus, the calculation gives: q0= 22 ml / r.

[0093] 2.2 Selection of the hydraulic motor:

[0094] The parameter selection hydraulic motor type A6V28EP12FP2-22, displacement range 8.1-28.1 ml / r, output torque range 18.564-64.4 N.m.

[0095] 2.3 Calculation of the power of the hydraulic motor:

[0096] According to the above, the output power of the hydraulic motor at 5 km / h can be calculated:

[0097] P0= pQ0η

[0098] = 16 x 106 x 0.25 x 10-3 x 0.9 = 3600 W;

[0099] Motor input power No = P0 / η

[0100] = 3600 / 0.9 = 4000 W;

[0101] In the above formula, η: is the mechanical efficiency.

[0102] 2.4 Selection of the vane pump:

[0103] The motor output speed is 720-900 rpm, corresponding to the stirring shaft output speed of 6-7.5 rpm, which meets the requirements of low-speed stirring.

[0104] According to the motor displacement, the motor flow is 20-24 L / min.

[0105] According to the motor flow and input speed range, the type of vane pump A37 is selected, the variable displacement of the vane pump is 27 ml / r and 17 ml / r. The speed range is 600-1800 rpm, the flow range is 17.76-53.28 L / min, and the volumetric efficiency is 80%.

[0106] 2.5 Calculation of the axle power take-off speed-up box:

[0107] Input torque of the pump:

[0108]

[0109] In the above formula: p = 16 MPa, ηm = 90%, q0 = 27 ml / r.

[0110]

[0111] From the above formula, the output torque of the axle power take-off speed-increasing box is ≥ 76.43 N.m.

[0112] 2.6 Calculation of the load of the mortar truck:

[0113] When the speed of the mortar truck is 5 km / h, the corresponding axle speed is 66.3 rpm; therefore, the axle power take-off speed-increasing box needs to increase the speed to 1000 rpm to meet the minimum speed requirement of the pump, and the speed ratio of the speed-increasing box is 1:15, at which time the torque required for the axle to drive the pump is:

[0114] Mi = Ti x i = 76.43 x 15 = 1146.5 N.m,

[0115] At this time, the load of the axle is: F = Mi / r = 1146.5 / 0.2 = 5732.5 N;

[0116] In the above formula: r: radius of the wheel.

[0117] 2.7 Calculation of the power consumption of the mortar truck mixer:

[0118] Therefore, the load power of the locomotive is:

[0119] N1 = Fv / 3.6 = 5.732.5 x 5 / 3.6 = 7.96 kW;

[0120] In the above formula: v = 5 km / h;

[0121] According to the above calculation, when the speed is 8 km / h and the pump displacement is 17 ml / r, the load power of the locomotive is N2 = 8.02 kW.

[0122] According to the construction conditions, the general energy consumption calculation is calculated according to the proportion of uphill and downhill, which is 50% each. The hydraulic mixing system relies on the deceleration component force of the marshalling on the downhill stage, and does not need to consume the energy of the locomotive, so the average energy consumption of the power take-off box hydraulic mixing is:

[0123] N0 = N2 / 2 = 4.01 kW.

[0124] III. Calculation of the driving power of the electric drive system:

[0125] The electric drive system is mainly driven by electric motor. The most important aspect of the selection of the electric motor, in addition to considering the power supply and operating conditions, is to determine the driving power. The appropriate electric motor is selected (in addition to the electric motor, there are also oil pressure and pneumatic motors). The capacity of the electric motor should include the power required for stirring, the power loss of the stirrer, and the power loss of the reducer. In addition to this, the calculation error and the power variation that may be caused by the change of operating conditions should also be considered. Generally, the power required for stirring only accounts for 60%-70% of the total driving power. The power loss of the stirrer and the reducer body accounts for about 10%-20%. The excess power is about 20%. The capacity of the electric motor is selected accordingly.

[0126] P B = P A / Z

[0127] It is calculated that the stirring power PA is 4.72 KW, and the motor power PB is 6.29 KW.

[0128] 4.72 / 6.29 = 75.04%.

[0129] Four, summary

[0130] The electric drive system works throughout the process when walking and stirring, and its energy consumption is higher than that of the power take-off box hydraulic stirring.

[0131] Example 5

[0132] Example 5 provides a control method of an electro-hydraulic double stirring system, the method comprising:

[0133] When the mortar car stops at the mortar outlet position, the electrical cabinet is electrically connected with the power supply system; the battery is charged; the third clutch 13 is powered on and combined, and the second clutch 12 is powered off and disconnected, and the electric drive system 5 works to drive the stirring structure 4.

[0134] When the mortar car is moving, the third clutch 13 is powered off and disconnected, the second clutch 12 is powered on and combined, and the battery supplies power to the hydraulic transmission device, the first clutch 11 and the control system. It is judged whether the non-stirring condition is met. If it is met, the first clutch 11 is disconnected, and the stirring structure 4 does not stir; otherwise, the first clutch 11 is combined, and the hydraulic drive system drives the stirring structure 4.

[0135] The non-stirring conditions include that the mortar tank 3 is empty, the speed of the mortar truck is less than or equal to the starting speed, the mortar truck is in a starting time period, the predicted movement time of the mortar truck is less than a set value (for example, the predicted movement time of the mortar truck is less than 0.5 h, and the mortar does not coagulate in the time period), and a non-stirring control instruction (for example, a manually input control instruction). Of course, the non-stirring conditions can also have others. Whether the mortar tank 3 is empty is determined by a stirring speed sensor or the movement direction of the mortar truck (for example, the mortar truck is reversely running).

[0136] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Electro-hydraulic double mixing system comprising a mortar tank (3), a mixing structure (4) inside the mortar tank (3) and an electric drive system (5) at one end of the mortar tank (3) and for driving the mixing structure (4); characterized in that, Also include the other end of the mortar tank (3) hydraulic drive system; The hydraulic drive system includes axle power take-off speed increasing box (6), transmission shaft (7), first clutch (11), hydraulic transmission device, hydraulic motor (9) and second speed reducer (10), the axle power take-off speed increasing box (6) is drivingly connected with the axle of the mortar truck and is drivingly connected with the hydraulic transmission device through the transmission shaft (7), the transmission shaft (7) is provided with the first clutch (11), the hydraulic transmission device drives the hydraulic motor (9), the hydraulic motor (9) is drivingly connected with the second speed reducer (10), and the hydraulic motor (9) is a constant flow hydraulic motor; the stirring shaft of the stirring structure (4) penetrates the mortar tank (3), one end of the stirring shaft is drivingly connected with the electric drive system (5) through the third clutch (13), and the other end of the stirring shaft is drivingly connected with the output shaft of the second speed reducer (10) through the second clutch (12); The electric drive system (5) works when the mortar truck is stationary, at which time the third clutch (13) is engaged, and the second clutch (12) is disconnected; the hydraulic drive system works when the speed of the mortar truck exceeds the starting speed, at which time the first clutch (11) is engaged, the second clutch (12) is engaged, and the third clutch (13) is disconnected; when the mortar truck is moving and the mortar truck is empty, the first clutch (11) is disconnected; when the speed of the mortar truck is less than or equal to the starting speed, the first clutch (11) is disconnected.

2. The electro-hydraulic dual agitation system of claim 1, wherein, The first clutch (11) is engaged by power supply and is disconnected or engaged by a control strategy, the second clutch (12) is engaged by power disconnection, and the third clutch (13) is engaged by power supply.

3. The electro-hydraulic dual agitation system of claim 1, wherein, The hydraulic transmission device comprises a hydraulic oil tank (14), a two-position three-way electromagnetic valve (15), a vane pump (16), an accumulator (17) and two direct-acting overflow valves (18); the vane pump (16) is drivingly connected with the transmission shaft (7), and an input end thereof is connected with the hydraulic oil tank (14) through a pipeline; an output end of the vane pump (16) is divided into two paths, one path is connected with an inlet of the hydraulic motor (9) through a pipeline, and the other path is connected with one inlet of the two-position three-way electromagnetic valve (15) through a pipeline; an outlet of the hydraulic motor (9) is connected with the other inlet of the two-position three-way electromagnetic valve (15) through a pipeline, an outlet of the two-position three-way electromagnetic valve (15) is connected with the hydraulic oil tank (14) through a pipeline, the accumulator (17) is arranged on the pipeline between the vane pump (16) and the hydraulic motor (9), and the inlet and the outlet of the hydraulic motor (9) are respectively connected with the hydraulic oil tank (14) through the pipelines provided with the direct-acting overflow valves (18).

4. The electro-hydraulic dual agitation system of claim 3, wherein, The hydraulic transmission device further comprises an air filter (19), a liquid level gauge (20), a thermometer (21), a heater (22), a magnetic filter (23), a differential pressure gauge (24), a cooler (25) and a pressure sensor (26), wherein the air filter (19), the liquid level gauge (20), the thermometer (21) and the heater (22) are arranged on the hydraulic oil tank (14), the magnetic filter (23) and the cooler (25) are arranged on a pipeline between the outlet of the two-position three-way electromagnetic valve (15) and the hydraulic oil tank (14), the two detection ends of the differential pressure gauge (24) are connected with the inlet and the outlet of the magnetic filter (23) through pipelines respectively, and the pressure sensor (26) is arranged on a pipeline between the vane pump (16) and the hydraulic motor (9).

5. The electro-hydraulic dual agitation system of claim 1, wherein, The electro-hydraulic double stirring system further comprises a control system, wherein the control system comprises an electrical cabinet, a charging module, an electric energy conversion module, a storage battery, a control and execution module and a stirring speed sensor, the output end of the electrical cabinet is electrically connected with the charging module, the electric energy conversion module and the electric driving system (5) respectively, the output end of the electric energy conversion module is electrically connected with the control and execution module, the first clutch (11), the second clutch (12) and the third clutch (13), the charging module is electrically connected with the input end of the storage battery, the output end of the storage battery is electrically connected with the control and execution module, and the control and execution module is electrically connected with the control end of the first clutch (11), the stirring speed sensor and the hydraulic transmission device.

6. The electro-hydraulic dual agitation system of claim 1, wherein, The hydraulic transmission device reaches the rated power when the speed of the mortar truck is the rated speed, the theoretical calculation average power of the hydraulic driving system is 70-80% of the theoretical calculation average power of the electric driving system (5), the starting speed is 3 km / h, the rated speed is 5 km / h, the running speed of the mortar truck is 5-8 km / h, and the output rotating speed of the axle power take-off speed increasing box (6) is greater than or equal to 600 rpm.

7. A track mortar vehicle comprising a vehicle body (1) and a plurality of running gears (2) at the bottom thereof; characterized in that, The electro-hydraulic double stirring system further comprises the mortar tank (3) arranged on the vehicle body (1) and the axle power take-off speed increasing box (6) drivingly connected with the axle of the nearby traveling part (2).

8. The rail mortar car of claim 7, wherein, The other end of the mortar tank (3) is provided with a support (8), the second speed reducer (10) is arranged on the support (8), and the hydraulic motor (9) is arranged on the upper side of the second speed reducer (10); the vane pump (16), the hydraulic oil tank (14) and the cooler (25) are all arranged on the vehicle body (1) and below the support (8), and the hydraulic oil tank (14) and the cooler (25) are arranged side by side in the width direction of the vehicle body (1) and on the side of the vane pump (16) away from the mortar tank (3).

9. The rail mortar car of claim 7, wherein, The track mortar truck further comprises a mortar discharging device, and the mortar discharging device and the hydraulic driving system are located at the end of the mortar tank (3) away from the vehicle head.

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