Beam transport vehicle walking energy-saving control method and system

Abstract

The present application relates to the girder transport vehicle walking system technical field, specifically relates to a kind of based on working condition classification's girder transport vehicle energy-saving control method and system.The present application can be under different working conditions of girder transport vehicle, simultaneously to the linear coupling control of diesel engine speed and hydraulic system displacement, make hydraulic system displacement and diesel engine power mutually matched, compared with the fixed speed control mode of traditional girder transport vehicle, can effectively solve when the low hydraulic system displacement, the problem of over high speed of diesel engine, to avoid energy loss and waste;The present application distinguishes the working condition under different conditions of girder transport vehicle, and by the linear coupling control of diesel engine and pump displacement, real-time adjustment the speed of diesel engine under different working conditions, can greatly improve the energy utilization efficiency of girder transport vehicle, and improve the overall use economy of equipment, and application prospect is wide.

Description

Technical Field

[0001] This invention relates to the field of beam transport vehicle travel system technology, specifically to an energy-saving control method and system for beam transport vehicles based on working condition classification. Background Technology

[0002] The girder transporter is a crucial piece of equipment for transporting box girders in railway construction. Its running system is equipped with a closed-loop hydraulic pump, and the diesel engine throttle is controlled by the engine ECU. The driver typically manually adjusts the diesel engine speed to the rated speed and operates the relevant switch levers to drive the girder transporter. The girder transporter controller outputs a proportional voltage based on the signal given by the operating levers to control the opening of the proportional valve of the hydraulic running drive pump, thereby controlling the travel speed of the girder transporter.

[0003] When existing beam transport vehicles are in operation, the travel motor needs to be supplied with oil, and the steering and suspension systems may be working at any time and also need to be supplied with oil. In order to ensure the oil supply of the hydraulic system oil pump and make the beam transport vehicle work stably, the diesel engine speed of the beam transport vehicle is maintained at a high constant value during normal operation, regardless of the operating conditions. This results in serious energy loss of the beam transport vehicle, causing energy waste and reducing the overall economic efficiency of the beam transport vehicle. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for energy-saving control of beam transport vehicle travel, which addresses the shortcomings of the prior art. This method and system can linearly couple the diesel engine speed and hydraulic system displacement under different working conditions of the beam transport vehicle, so that the hydraulic system displacement and diesel engine power are matched, thereby effectively improving the energy utilization efficiency of the beam transport vehicle travel system and realizing energy saving and emission reduction of the system.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] I. A method for energy-saving control of beam transport vehicle travel

[0007] This invention provides a method for energy-saving control of beam transport vehicle movement, which mainly includes the following steps:

[0008] S1, to check the actual working condition of the beam transport vehicle;

[0009] S2 linearly couples the diesel engine speed with the hydraulic system displacement;

[0010] S3, determine the engine power range under the current working condition based on the actual working parameters of the beam transport vehicle;

[0011] S4, based on the engine power range under the current operating conditions, sets the speed control range of the diesel engine under the current operating conditions;

[0012] S5, within the speed control range, simultaneously performs linear automatic control of the diesel engine speed and the hydraulic system displacement.

[0013] Furthermore, in step S1, the actual working conditions of the beam transport vehicle include: standby mode, traveling mode, and loading / unloading mode;

[0014] The actual working condition of the beam transport vehicle is determined by detecting the input signals of the beam transport vehicle controller:

[0015] When the movement of the beam transport vehicle's traveling mechanism is detected, it is determined that the vehicle is currently in a traveling state.

[0016] When it is detected that the traveling mechanism of the beam transport vehicle is not moving and the outriggers are extended, it is determined that the current condition is loading and unloading.

[0017] When it is detected that the traveling mechanism of the beam transport vehicle is not moving and the outriggers are not extended, it is determined that the vehicle is currently in standby mode.

[0018] Furthermore, in step S2, the linear coupling of the diesel engine speed with the hydraulic system displacement includes:

[0019] Linear control is applied to the operating handle to output a linear control current, ensuring that the opening of the proportional valve of the hydraulic system's drive pump is linearly proportional to the control current. Simultaneously, the control parameters of the beam transport vehicle controller for linear control of the diesel engine speed are adjusted to couple the diesel engine speed with the opening of the proportional valve of the drive pump, satisfying the following:

[0020] When the operating handle is at the linear start point, both the proportional valve opening of the drive pump and the diesel engine speed are at the linear control start point position.

[0021] When the operating handle is at the linear endpoint, the proportional valve opening of the drive pump and the diesel engine speed simultaneously reach the linear control endpoint position.

[0022] Furthermore, in step S3, determining the engine power range under the current operating conditions based on the actual operating parameters of the beam transport vehicle specifically includes:

[0023] When the beam transport vehicle is in the traveling condition, the minimum engine power under the current condition is calculated by multiplying the minimum power required when the traveling mechanism, steering mechanism, and suspension mechanism of the beam transport vehicle are working simultaneously by correction factor one. The maximum engine power under the current condition is calculated by multiplying the rated power when the traveling mechanism, steering mechanism, and suspension mechanism of the beam transport vehicle are working simultaneously by correction factor two.

[0024] When the beam transport vehicle is in loading and unloading condition, the engine power range under the current condition is calculated and determined by multiplying the working power range of the outrigger mechanism by a correction factor of 3.

[0025] When the beam transporter is in standby mode, the engine power range under the current operating condition is a preset range determined according to the beam transporter parameters.

[0026] Furthermore, in step S4, setting the speed control range of the diesel engine under the current operating conditions specifically includes:

[0027] Based on the control parameters for linear control of the diesel engine speed by the coupled and adjusted beam transport vehicle controller, and combined with the engine power range under the current operating conditions, the diesel engine speed range corresponding to the engine power range is determined.

[0028] Furthermore, in step S5, the simultaneous linear automatic control of the diesel engine speed and the hydraulic system displacement specifically includes:

[0029] Based on the engine power range under the current operating conditions, determine the start and end points of the linear control of the diesel engine speed;

[0030] Based on the linear coupling relationship between the diesel engine speed and the hydraulic system displacement, the starting point and ending point of the linear control of the proportional valve opening of the drive pump are determined, and then the output range of the control current is calculated.

[0031] Based on the output range of the control current, the linear control range of the operating handle is determined, and the beam transport vehicle controller is switched to the automatic speed control mode to adjust the diesel engine speed and hydraulic system displacement in real time according to the output signal of the operating handle.

[0032] When the beam transport vehicle is in the traveling condition, the speed control range of the diesel engine is 1800-2100 rpm;

[0033] When the beam transport vehicle is in loading and unloading mode, the speed control range of the diesel engine is 900-1100 rpm;

[0034] When the beam transport vehicle is in standby mode, the speed control range of the diesel engine is 800-1000 rpm.

[0035] II. An energy-saving control system for beam transport vehicles

[0036] Based on the same inventive concept, the present invention also provides an energy-saving control system for a beam transport vehicle employing the control method described above, including...

[0037] Walking mechanism: used to drive the beam transport vehicle to move in a straight line;

[0038] Steering mechanism: used to drive the beam transport vehicle to steer;

[0039] Outrigger mechanism: Used to support the body of the girder transport vehicle during loading and unloading of box girders;

[0040] The beam transporter controller is used to collect the status signals of the traveling mechanism, steering mechanism, and outrigger mechanism in real time to determine the actual working condition of the beam transporter, and at the same time to perform linear automatic control of the diesel engine speed and hydraulic system displacement.

[0041] Compared with the prior art, the present invention has the following main advantages:

[0042] 1. This invention provides a method and system for energy-saving control of beam transport vehicle travel, which can simultaneously perform linear coupling control of diesel engine speed and hydraulic system displacement under different working conditions of beam transport vehicle, so that hydraulic system displacement and diesel engine power are matched. Compared with the fixed speed control method of traditional beam transport vehicle, it can effectively solve the problem of excessively high diesel engine speed when the hydraulic system displacement is low, thereby avoiding energy loss and waste.

[0043] 2. This invention distinguishes the working conditions of the beam transport vehicle under different conditions, and through the linear coupling control of the diesel engine and pump displacement, it can adjust the diesel engine speed in real time under different working conditions, which can greatly improve the energy utilization efficiency of the beam transport vehicle and improve the overall economic efficiency of the equipment. It has broad application prospects. Attached Figure Description

[0044] Figure 1 This is an overall flowchart of the energy-saving control method for the beam transport vehicle in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram illustrating the relationship between diesel engine speed and power in an embodiment of the present invention. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0047] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0048] Example 1: This example provides an energy-saving control method for the movement of a beam transport vehicle, such as... Figure 1 As shown, the main steps include the following:

[0049] S1, to check the actual working condition of the beam transport vehicle;

[0050] S2 linearly couples the diesel engine speed with the hydraulic system displacement;

[0051] S3, determine the engine power range under the current working condition based on the actual working parameters of the beam transport vehicle;

[0052] S4, based on the engine power range under the current operating conditions, sets the speed control range of the diesel engine under the current operating conditions;

[0053] S5, within the speed control range, simultaneously performs linear automatic control of the diesel engine speed and the hydraulic system displacement.

[0054] Furthermore, in step S1, the actual working conditions of the beam transport vehicle include: standby mode, traveling mode, and loading / unloading mode;

[0055] The actual working condition of the beam transport vehicle is determined by detecting the input signals of the beam transport vehicle controller:

[0056] When the movement of the beam transport vehicle's traveling mechanism is detected, it is determined that the vehicle is currently in a traveling state.

[0057] When it is detected that the traveling mechanism of the beam transport vehicle is not moving and the outriggers are extended, it is determined that the current condition is loading and unloading.

[0058] When it is detected that the traveling mechanism of the beam transport vehicle is not moving and the outriggers are not extended, it is determined that the vehicle is currently in standby mode.

[0059] Furthermore, in step S2, the linear coupling of the diesel engine speed with the hydraulic system displacement includes:

[0060] Linear control is applied to the operating handle to output a linear control current, ensuring that the opening of the proportional valve of the hydraulic system's drive pump is linearly proportional to the control current. Simultaneously, the control parameters of the beam transport vehicle controller for linear control of the diesel engine speed are adjusted to couple the diesel engine speed with the opening of the proportional valve of the drive pump, satisfying the following:

[0061] When the operating handle is at the linear start point, both the proportional valve opening of the drive pump and the diesel engine speed are at the linear control start point position.

[0062] When the operating handle is at the linear endpoint, the proportional valve opening of the drive pump and the diesel engine speed simultaneously reach the linear control endpoint position.

[0063] Furthermore, in step S3, determining the engine power range under the current operating conditions based on the actual operating parameters of the beam transport vehicle specifically includes:

[0064] When the beam transport vehicle is in the traveling condition, the minimum engine power under the current condition is calculated by multiplying the minimum power required when the traveling mechanism, steering mechanism, and suspension mechanism of the beam transport vehicle are working simultaneously by correction factor one. The maximum engine power under the current condition is calculated by multiplying the rated power when the traveling mechanism, steering mechanism, and suspension mechanism of the beam transport vehicle are working simultaneously by correction factor two.

[0065] When the beam transport vehicle is in loading and unloading condition, the engine power range under the current condition is calculated and determined by multiplying the working power range of the outrigger mechanism by a correction factor of 3.

[0066] When the beam transporter is in standby mode, the engine power range under the current operating condition is a preset range determined according to the beam transporter parameters.

[0067] Furthermore, in step S4, setting the speed control range of the diesel engine under the current operating conditions specifically includes:

[0068] Based on the control parameters for linear control of the diesel engine speed by the coupled and adjusted beam transport vehicle controller, and combined with the engine power range under the current operating conditions, the diesel engine speed range corresponding to the engine power range is determined.

[0069] Furthermore, in step S5, the simultaneous linear automatic control of the diesel engine speed and the hydraulic system displacement specifically includes:

[0070] Based on the engine power range under the current operating conditions, determine the start and end points of the linear control of the diesel engine speed;

[0071] Based on the linear coupling relationship between the diesel engine speed and the hydraulic system displacement, the starting point and ending point of the linear control of the proportional valve opening of the drive pump are determined, and then the output range of the control current is calculated.

[0072] Based on the output range of the control current, the linear control range of the operating handle is determined, and the beam transport vehicle controller is switched to the automatic speed control mode to adjust the diesel engine speed and hydraulic system displacement in real time according to the output signal of the operating handle.

[0073] When the beam transport vehicle is in the traveling condition, the speed control range of the diesel engine is 1800-2100 rpm;

[0074] When the beam transport vehicle is in loading and unloading mode, the speed control range of the diesel engine is 900-1100 rpm;

[0075] When the beam transport vehicle is in standby mode, the speed control range of the diesel engine is 800-1000 rpm.

[0076] Example 2: This example provides an energy-saving control method for the movement of a beam transport vehicle. By linearly coupling the diesel engine and the hydraulic system, the original constant speed control method, which only adjusts the speed individually, is improved into a new method that linearly regulates both the diesel engine speed and the hydraulic system displacement. This improvement aims to solve the problem of excessively high diesel engine speed when the hydraulic system displacement is low, thereby more effectively improving energy utilization efficiency.

[0077] In the control system, the displacement of the hydraulic pump is linearly proportional to the control current. The control current is within the range of 7-43mA, and the pump displacement is controlled from 0-100%. Here, 7mA is the starting point of the pump, and 0-7mA is the dead zone designed for the pump.

[0078] When the handle (which has a dead zone designed for safety) is at the starting point of the linear range, the pump's displacement (7mA) and the diesel engine's speed (800rpm) are both at the starting position; when the handle reaches the ending point of the linear range, the pump's displacement (43mA) and the diesel engine's speed (2100rpm) reach the linear range simultaneously.

[0079] like Figure 2 As shown, the diesel engine's speed output ranges from 600 to 2100 rpm, with an approximately linear output power of 85-447 kW. To ensure the normal operation of the diesel engine, the starting point is set to 800-2100 rpm, at which point the system's stability is relatively good.

[0080] Example 3, based on the same inventive concept, this example also provides an energy-saving control system for a beam transport vehicle that employs the control method described above, mainly including:

[0081] Walking mechanism: used to drive the beam transport vehicle to move in a straight line;

[0082] Steering mechanism: used to drive the beam transport vehicle to steer;

[0083] Outrigger mechanism: Used to support the body of the girder transport vehicle during loading and unloading of box girders;

[0084] The beam transporter controller is used to collect the status signals of the traveling mechanism, steering mechanism, and outrigger mechanism in real time to determine the actual working condition of the beam transporter, and at the same time to perform linear automatic control of the diesel engine speed and hydraulic system displacement.

[0085] Example 4: Based on the same inventive concept, this example also provides a beam transport vehicle, which is equipped with the beam transport vehicle travel energy-saving control system described above.

[0086] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0087] In summary:

[0088] 1. This invention provides a method and system for energy-saving control of beam transport vehicle travel, which can simultaneously perform linear coupling control of diesel engine speed and hydraulic system displacement under different working conditions of beam transport vehicle, so that hydraulic system displacement and diesel engine power are matched. Compared with the fixed speed control method of traditional beam transport vehicle, it can effectively solve the problem of excessively high diesel engine speed when the hydraulic system displacement is low, thereby avoiding energy loss and waste.

[0089] 2. This invention distinguishes the working conditions of the beam transport vehicle under different conditions, and through the linear coupling control of the diesel engine and pump displacement, it can adjust the diesel engine speed in real time under different working conditions, which can greatly improve the energy utilization efficiency of the beam transport vehicle and improve the overall economic efficiency of the equipment. It has broad application prospects.

[0090] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for energy-saving control of beam transport vehicle travel, characterized in that: Includes the following steps: S1, to check the actual working condition of the beam transport vehicle; S2, which linearly couples the diesel engine speed with the hydraulic system displacement, includes: Linear control is applied to the operating handle to output a linear control current, ensuring that the opening of the proportional valve of the hydraulic system's drive pump is linearly proportional to the control current. Simultaneously, the control parameters of the beam transport vehicle controller for linear control of the diesel engine speed are adjusted to couple the diesel engine speed with the opening of the proportional valve of the drive pump, satisfying the following: When the operating handle is at the linear start point, both the proportional valve opening of the drive pump and the diesel engine speed are at the linear control start point position. When the operating handle is at the linear endpoint, the proportional valve opening of the drive pump and the diesel engine speed simultaneously reach the linear control endpoint position. S3, determine the engine power range under the current working condition based on the actual working parameters of the beam transport vehicle; S4, based on the engine power range under the current operating conditions, sets the speed control range of the diesel engine under the current operating conditions; S5, within the speed control range, simultaneously performs linear automatic control of both the diesel engine speed and the hydraulic system displacement, specifically including: Based on the engine power range under the current operating conditions, determine the start and end points of the linear control of the diesel engine speed; Based on the linear coupling relationship between the diesel engine speed and the hydraulic system displacement, the starting point and ending point of the linear control of the proportional valve opening of the drive pump are determined, and then the output range of the control current is calculated. Based on the output range of the control current, the linear control range of the operating handle is determined, and the beam transport vehicle controller is switched to the automatic speed control mode to adjust the diesel engine speed and hydraulic system displacement in real time according to the output signal of the operating handle.

2. The energy-saving control method for the beam transport vehicle according to claim 1, characterized in that... In step S1, the actual working conditions of the beam transport vehicle include: standby mode, traveling mode, and loading / unloading mode; The actual working condition of the beam transport vehicle is determined by detecting the input signals of the beam transport vehicle controller: When the movement of the beam transport vehicle's traveling mechanism is detected, it is determined that the vehicle is currently in a traveling state. When it is detected that the traveling mechanism of the beam transport vehicle is not moving and the outriggers are extended, it is determined that the current condition is loading and unloading. When it is detected that the traveling mechanism of the beam transport vehicle is not moving and the outriggers are not extended, it is determined that the vehicle is currently in standby mode.

3. The energy-saving control method for the beam transport vehicle according to claim 1, characterized in that... In step S3, determining the engine power range under the current operating conditions based on the actual operating parameters of the beam transport vehicle specifically includes: When the beam transport vehicle is in the traveling condition, the minimum engine power under the current condition is calculated by multiplying the minimum power required when the traveling mechanism, steering mechanism, and suspension mechanism of the beam transport vehicle are working simultaneously by correction factor one. The maximum engine power under the current condition is calculated by multiplying the rated power when the traveling mechanism, steering mechanism, and suspension mechanism of the beam transport vehicle are working simultaneously by correction factor two. When the beam transport vehicle is in loading and unloading condition, the engine power range under the current condition is calculated and determined by multiplying the working power range of the outrigger mechanism by a correction factor of 3. When the beam transporter is in standby mode, the engine power range under the current operating condition is a preset range determined according to the beam transporter parameters.

4. The energy-saving control method for the beam transport vehicle according to claim 3, characterized in that... In step S4, setting the speed control range of the diesel engine under the current operating conditions specifically includes: Based on the control parameters for linear control of the diesel engine speed by the coupled and adjusted beam transport vehicle controller, and combined with the engine power range under the current operating conditions, the diesel engine speed range corresponding to the engine power range is determined.

5. The energy-saving control method for the beam transport vehicle according to claim 4, characterized in that, When the beam transport vehicle is in the traveling condition, the speed control range of the diesel engine is 1800-2100 rpm.

6. The energy-saving control method for the beam transport vehicle according to claim 4, characterized in that, When the beam transport vehicle is in loading and unloading mode, the speed control range of the diesel engine is 900-1100 rpm; when the beam transport vehicle is in standby mode, the speed control range of the diesel engine is 800-1000 rpm.

7. A beam transport vehicle travel energy-saving control system employing the control method described in any one of claims 1 to 6, characterized in that, include: Walking mechanism: used to drive the beam transport vehicle to move in a straight line; Steering mechanism: used to drive the beam transport vehicle to steer; Outrigger mechanism: Used to support the body of the girder transport vehicle during loading and unloading of box girders; The beam transporter controller is used to collect the status signals of the traveling mechanism, steering mechanism, and outrigger mechanism in real time to determine the actual working condition of the beam transporter, and at the same time to perform linear automatic control of the diesel engine speed and hydraulic system displacement.

8. A beam transport vehicle, characterized in that: Includes the beam transport vehicle travel energy-saving control system as described in claim 7.

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