Pump group power matching method, device and operating machinery

Abstract

The present invention relates to the field of engineering machinery, and provides a method, device and operating machinery for matching power of a pump group, the method comprising: obtaining the current speed of the engine, and determining the first distributable torque of the pump group based on the current speed; obtaining the current pressure of each pump in the pump group, and determining the torque distribution ratio of each pump in the pump group based on the current pressure; determining the second distributable torque of each pump based on the first distributable torque and the torque distribution ratio, and determining the power distribution result of each pump based on the second distributable torque and the current speed of the engine. The present invention realizes adaptive dynamic matching of the power of the engine and each pump in the pump group, and at the current speed of the engine, can maximize the use efficiency of the engine torque, reduce fuel waste, and effectively prevent the occurrence of stalling while ensuring operating efficiency, thereby improving the user's operating experience.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a pump group power matching method, device and operating machinery. Background Art

[0002] When the operating machinery performs actions under different working conditions at low engine speed, such as double-pump arm extension, width raising, heavy-load hook lifting, combined actions, etc., there is a problem that the engine is prone to stalling.

[0003] At present, in order to prevent stalling, the operator needs to actively speed up the engine and then control the operating machine to perform corresponding actions. This requires a high level of operator proficiency. It is difficult for the operator to control and match the appropriate engine speed, which has a great impact on the user's operating experience. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a pump group power matching method, device and operating machinery.

[0005] The present invention provides a pump group power matching method, comprising:

[0006] Acquire a current speed of the engine, and determine a first distributable torque of the pump group based on the current speed;

[0007] Acquire the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure;

[0008] Based on the first allocable torque and the torque distribution ratio, a second allocable torque of each pump is determined, and based on the second allocable torque and the current speed of the engine, a power distribution result of each pump is determined.

[0009] According to the pump group power matching method provided by the present invention, the first distributable torque of the pump group is determined based on the current rotation speed, including:

[0010] determining an available torque of the engine based on a current speed of the engine;

[0011] acquiring a fixed load of the working machine, and determining a loss torque of the engine based on the fixed load;

[0012] The first distributable torque of the pump group is determined based on the available torque and the loss torque.

[0013] According to the pump group power matching method provided by the present invention, the torque distribution ratio of each pump in the pump group is determined based on the current pressure, including:

[0014] Obtaining the rated displacement of each pump and the current working flag of each pump;

[0015] The torque distribution ratio of each pump is determined based on the current pressure of each pump, the rated displacement of each pump and the current working flag of each pump.

[0016] According to the pump group power matching method provided by the present invention, the torque distribution ratio of each pump is determined based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump, including:

[0017] Acquire the product of the current pressure of the target pump, the rated displacement of the target pump and the current working mark of the target pump as the first data of the target pump; wherein the target pump is any one pump in the pump group;

[0018] Based on the second data and the first data of the target pump, the torque distribution ratio of the target pump is determined; wherein the second data is the cumulative value of the first data of all the pumps in the pump group; the torque distribution ratio of the target pump is directly proportional to the first data, and inversely proportional to the second data.

[0019] According to the pump group power matching method provided by the present invention, after determining the power allocation result of each pump, it also includes:

[0020] Acquiring a first value of an electrical control signal of the pump based on the power distribution result; the electrical control signal is used to control the adjustment of the power of the pump;

[0021] Determine a loading slope of the electrical control signal, wherein the loading slope is used to characterize the loading time length for the electrical control signal of the pump to change from a second value to the first value; wherein the second value is used to characterize the current value of the electrical control signal of the pump;

[0022] The electrical control signal is applied to the pump based on the loading ramp so that the power of the pump reaches the power distribution result under the loading duration.

[0023] According to the pump group power matching method provided by the present invention, the determining of the loading slope of the electric control signal comprises:

[0024] Obtaining a current load rate of the engine;

[0025] A loading ramp of the electric control signal is determined based on a current load rate of the engine.

[0026] The present invention also provides a pump group power matching device, comprising:

[0027] a first calculation module, configured to obtain a current rotation speed of the engine, and determine a first distributable torque of the pump group based on the current rotation speed;

[0028] A second calculation module is used to obtain the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure;

[0029] The third calculation module is used to determine the second allocable torque of each pump based on the first allocable torque and the torque distribution ratio, and to determine the power distribution result of each pump based on the second allocable torque and the current speed of the engine.

[0030] The present invention also provides an operating machine, comprising: an engine, a pump group and a control device, wherein the control device is used to execute any one of the pump group power matching methods described above.

[0031] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a pump group power matching method as described in any one of the above is implemented.

[0032] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the pump group power matching method as described in any one of the above is implemented.

[0033] The pump group power matching method, device and operating machinery provided by the present invention obtain the current speed of the engine, determine the first distributable torque of the pump group based on the current speed, obtain the current pressure of each pump in the pump group, determine the torque distribution ratio of each pump in the pump group based on the current pressure, determine the second distributable torque of each pump based on the first distributable torque and the torque distribution ratio, and determine the power distribution result of each pump based on the second distributable torque and the current speed of the engine, thereby realizing adaptive dynamic matching of the power of the engine and each pump in the pump group. Under the current speed of the engine, the utilization efficiency of the engine torque can be maximized, the waste of fuel can be reduced, and the occurrence of stalling can be effectively prevented while ensuring the operating efficiency, thereby improving the user's operating experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1This is one of the flow diagrams of the pump group power matching method provided by the present invention;

[0036] Figure 2 This is the second flow chart of the pump group power matching method provided by the present invention;

[0037] Figure 3 It is a schematic diagram of a flow chart of loading a current control signal to a corresponding pump provided by the present invention;

[0038] Figure 4 It is a structural schematic diagram of the pump group power matching device provided by the present invention;

[0039] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Combine the following Figures 1 to 3 The pump group power matching method of the present invention is described. The pump group power matching method of the present invention is executed by an electronic device such as a controller or the hardware and / or software therein. The controller can be a controller of the operating machine itself, a controller newly added to the operating machine, or a remote controller. Figure 1 As shown, the pump group power matching method of the present invention includes:

[0042] S101. Acquire a current rotation speed of the engine, and determine a first distributable torque of the pump group based on the current rotation speed.

[0043] Specifically, the current speed of the engine, that is, the speed of the engine at the current moment, can be obtained in real time through the engine controller. The first allocable torque of the pump group, that is, the torque that can be allocated to the pump group in the output torque of the engine at the current moment. There is a corresponding relationship between the output power of the engine and the speed of the engine, that is, at the current speed of the engine, the output power of the engine is a fixed value, and at the same time, the output torque of the engine is proportional to the output power of the engine. Therefore, the output torque of the engine at the current speed can be allocated to achieve the distribution of the output power of the engine.

[0044] The specific method of determining the first distributable torque of the pump group based on the current speed of the engine can be set according to actual needs. For example, the available torque of the engine can be determined based on the current speed of the engine, and the first distributable torque of the pump group can be determined according to the available torque of the engine; wherein the available torque of the engine is the output torque of the engine at the current speed. The current speed of the engine can also be matched according to the preset corresponding relationship between the engine speed and the first distributable torque of the pump group to obtain the first distributable torque of the pump group at the current speed of the engine.

[0045] S102: Acquire the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure.

[0046] Specifically, the pump group may include multiple pumps, and the current pressure of the pump, that is, the pressure of the pump at the current moment, can be detected by a pressure sensor. The torque distribution ratio of the pump, that is, the ratio of the torque distributed by the pump in the first distributable torque of the pump group.

[0047] The specific method of determining the torque distribution ratio of each pump in the pump group based on the current pressure of each pump can be set according to actual needs. For example, the torque distribution ratio of each pump can be determined according to the pressure of each pump. The greater the pressure, the more torque is distributed, and the smaller the pressure, the less torque is distributed. The current pressure of the pump can also be combined with the rated displacement of the pump and / or the working mark of the pump at the current moment to determine the torque distribution ratio of each pump in the pump group. For example, the torque distribution ratio of the pump can be determined according to the product of the current pressure of the pump, the rated displacement of the pump and the working mark of the pump at the current moment. The embodiment of the present invention determines the torque distribution ratio of each pump in the pump group based on the current pressure, so that at the current speed of the engine, the efficiency of the use of the engine torque can be maximized, and single action / compound action can be performed without the operator actively speeding up. Under the condition of low engine speed, the problem of heavy load speed loss and flameout can be effectively solved. Under the condition of high engine speed, the high-speed heavy load operation efficiency can be effectively guaranteed, and the heavy load micro-mobility is improved.

[0048] It should be noted that the order of step S101 and step S102 is not specifically limited. Step S101 may be performed first and then step S102, or step S102 may be performed first and then step S101.

[0049] S103: Determine a second allocable torque of each pump based on the first allocable torque and the torque distribution ratio, and determine a power distribution result of each pump based on the second allocable torque and the current speed of the engine.

[0050] Specifically, the power distribution result of the pump, that is, the power of the engine output power distributed to each pump in the pump group. The second allocable torque of each pump in the pump group can be determined based on the first allocable torque of the pump group and the torque distribution ratio of each pump in the pump group. For example, the first allocable torque can be multiplied by the torque distribution ratio to obtain the second allocable torque of the corresponding pump; it is understandable that the result of multiplying the first allocable torque by the torque distribution ratio can also be corrected according to actual needs to obtain the second allocable torque of the corresponding pump.

[0051] After obtaining the second allocable torque of each pump in the pump group, the power distribution result of the corresponding pump can be determined based on the second allocable torque and the current speed of the engine. For example, the second allocable torque can be multiplied by the current speed of the engine to obtain the power distribution result of the corresponding pump, thereby completing the power matching of each pump in the pump group.

[0052] In order to prevent the operating machinery from stalling when performing actions under different working conditions, the traditional method is that the operator usually actively speeds up the engine and then controls the operating machinery to perform the corresponding actions. This requires a high level of operator proficiency. It is difficult for the operator to control and match the appropriate engine speed. When the engine speed is too high, the engine torque cannot be fully utilized, resulting in fuel waste. When the engine speed is insufficient, it is still impossible to effectively prevent the occurrence of stalling, which has a great impact on the user's operating experience.

[0053] The embodiment of the present invention obtains the current speed of the engine, determines the first distributable torque of the pump group based on the current speed, obtains the current pressure of each pump in the pump group, determines the torque distribution ratio of each pump in the pump group based on the current pressure, determines the second distributable torque of each pump based on the first distributable torque and the torque distribution ratio, and determines the power distribution result of each pump based on the second distributable torque and the current speed of the engine, thereby achieving adaptive dynamic matching of the power of the engine and each pump in the pump group. Under the current speed of the engine, the utilization efficiency of the engine torque can be maximized and fuel waste can be reduced. It can also effectively prevent the occurrence of stalling while ensuring operating efficiency, thereby improving the user's operating experience.

[0054] Based on the above embodiment, determining the first distributable torque of the pump group based on the current rotation speed includes:

[0055] determining an available torque of the engine based on a current speed of the engine;

[0056] acquiring a fixed load of the working machine, and determining a loss torque of the engine based on the fixed load;

[0057] The first distributable torque of the pump group is determined based on the available torque and the loss torque.

[0058] Specifically, the specific method of determining the available torque of the engine based on the current speed of the engine can be set according to actual needs. For example, the current speed of the engine can be matched according to the preset corresponding relationship between the engine speed and the available torque to obtain the available torque of the engine at the current speed. The corresponding relationship between the engine speed and the available torque can be obtained by the following method:

[0059] When the engine is at different speeds, the critical value of the engine torque is obtained respectively; wherein the critical value of the engine torque may be the torque when the engine is stalled;

[0060] The available torque of the engine when it is at a corresponding speed is determined based on a critical value of the engine torque; for example, the critical value of the engine torque may be subtracted from an error term to obtain the available torque of the engine when it is at a corresponding speed, and the error term may be set according to accuracy requirements and engine performance.

[0061] The fixed load of the working machine, that is, the load of the working machine itself that affects the first distributable torque of the pump group, for example, the cylinder arm pin pressure. The specific method of determining the loss torque of the engine based on the fixed load can be set according to actual needs. For example, for the cylinder arm pin, the torque consumed by the cylinder arm pin can be determined according to the cylinder arm pin pressure by detecting the cylinder arm pin pressure. Specifically, the torque consumed by the cylinder arm pin can be determined based on the corresponding relationship between the cylinder arm pin pressure and the consumed torque. In the case of multiple fixed loads, the torque consumed by each fixed load can be summed to obtain the loss torque of the engine.

[0062] The specific method of determining the first distributable torque of the pump group based on the available torque and the loss torque can be set according to actual needs. For example, the available torque of the engine can be subtracted from the loss torque of the engine to obtain the first distributable torque of the pump group. The available torque of the engine can also be corrected according to the torque output characteristics of the engine. For example, the available torque of the engine is multiplied by a correction coefficient to obtain a corrected available torque, and the corrected available torque is subtracted from the loss torque of the engine to obtain the first distributable torque of the pump group.

[0063] The embodiment of the present invention determines the available torque of the engine based on the current speed of the engine, obtains the fixed load of the working machine, determines the loss torque of the engine based on the fixed load, and determines the first distributable torque of the pump group based on the available torque and the loss torque, thereby effectively improving the accuracy of the first distributable torque of the pump group, and further providing a data basis for improving the power matching accuracy of each pump in the pump group.

[0064] Based on any of the above embodiments, determining the torque distribution ratio of each pump in the pump group based on the current pressure includes:

[0065] Obtaining the rated displacement of each pump and the current working flag of each pump;

[0066] The torque distribution ratio of each pump is determined based on the current pressure of each pump, the rated displacement of each pump and the current working flag of each pump.

[0067] Specifically, the rated displacement of the pump is the rated maximum displacement of the pump. The rated displacements of different pumps are different and are fixed values. In the process of determining the torque distribution ratio of each pump in the pump group, by fully considering the rated displacement of the pump, in the process of controlling the pump according to the power distribution result, it is possible to effectively avoid exceeding the rated displacement of the pump, thereby ensuring the effectiveness of the power distribution result.

[0068] The current working flag of the pump is used to characterize the working state of the pump at the current moment, and the working state of the pump may include working and not working. The current working flag of the pump can be collected through the CAN line. For example, the signal value of the status flag in the CAN signal can be used as the current working flag of the pump. For example, the current working flag is 1, indicating that the current working state of the pump is working, that is, the pump is performing the corresponding action at the current moment. The current working flag is 0, indicating that the current working state of the pump is not working, that is, the pump is not performing any action at the current moment. In the process of determining the torque distribution ratio of each pump in the pump group, by fully considering the current working state of the pump, it can be ensured that the torque of the engine is only distributed to the pump in the pump group that is in operation, further improving the efficiency of the use of the engine torque.

[0069] The specific method of determining the torque distribution ratio of the pump based on the current pressure, rated displacement and current working mark of the pump can be set according to actual needs. For example, the current pressure, rated displacement and current working mark of the target pump can be multiplied to obtain the first data of the target pump, and the torque distribution ratio of the target pump can be determined based on the second data and the first data of the target pump; wherein the target pump is any pump in the pump group, the second data is the cumulative value of the first data of all the pumps in the pump group, and the torque distribution ratio of the target pump is proportional to the first data and inversely proportional to the second data. Candidate pumps can also be determined based on the current working mark, and the candidate pumps are the pumps in the pump group that are in operation; the torque distribution ratio of each candidate pump is determined based on the current pressure and rated displacement of each candidate pump; wherein the torque distribution ratio of the non-operating pump in the pump group can be 0.

[0070] The embodiment of the present invention obtains the rated displacement of each pump in the pump group and the current working mark of each pump, and determines the torque distribution ratio of the pump based on the current pressure, rated displacement and current working mark of each pump, thereby maximizing the utilization efficiency of the engine torque and ensuring the effectiveness of the power distribution result.

[0071] Based on any of the above embodiments, determining the torque distribution ratio of each pump based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump includes:

[0072] Acquire the product of the current pressure of the target pump, the rated displacement of the target pump and the current working mark of the target pump as the first data of the target pump; wherein the target pump is any one pump in the pump group;

[0073] Based on the second data and the first data of the target pump, the torque distribution ratio of the target pump is determined; wherein the second data is the cumulative value of the first data of all the pumps in the pump group; the torque distribution ratio of the target pump is directly proportional to the first data, and inversely proportional to the second data.

[0074] Specifically, the target pump is any one of the pumps in the pump group, that is, the pump in the pump group whose torque distribution ratio is currently to be determined. For each pump in the pump group, the first data corresponding to it is calculated, that is, the current pressure, rated displacement and current working flag of the pump are multiplied to obtain the first data of the pump.

[0075] After obtaining the first data of each pump in the pump group, the first data of all the pumps in the pump group are summed up to obtain the accumulated value of the first data of all the pumps in the pump group, that is, the second data.

[0076] The torque distribution ratio of the target pump can be determined based on the second data and the first data of the target pump, wherein the torque distribution ratio of the target pump is proportional to the first data of the target pump and inversely proportional to the second data. For example, the ratio of the first data of the target pump to the second data can be calculated to obtain the torque distribution ratio of the target pump.

[0077] As an optional implementation, the torque distribution ratio of the pump can be determined by formula (1):

[0078]

[0079] In the formula, r i is the torque distribution ratio of the i-th pump; n is the number of pumps in the pump group; P i , P j are the current pressures of the i-th pump and the j-th pump respectively; are the rated displacements of the ith pump and the jth pump respectively; F i 、F j are the current working signs of the i-th pump and the j-th pump, respectively, and F i 、F jIt is 0 or 1, 0 means the corresponding pump is not working, 1 means the corresponding pump is working.

[0080] The embodiment of the present invention obtains the first data of the target pump based on the current pressure, rated displacement and current working flag of the target pump, and obtains the accumulated value of the first data of all the pumps in the pump group to obtain the second data. Based on the second data and the first data of the target pump, the torque distribution ratio of the target pump can be determined quickly and effectively, and it can effectively ensure that the engine torque is only distributed to the working pump in the pump group, further improving the utilization efficiency of the engine torque.

[0081] Based on any of the above embodiments, after determining the power allocation result of each pump, the method further includes:

[0082] Acquiring a first value of an electrical control signal of the pump based on the power distribution result; the electrical control signal is used to control the adjustment of the power of the pump;

[0083] Determine a loading slope of the electrical control signal, wherein the loading slope is used to characterize the loading time length for the electrical control signal of the pump to change from a second value to the first value; wherein the second value is used to characterize the current value of the electrical control signal of the pump;

[0084] The electrical control signal is applied to the pump based on the loading ramp so that the power of the pump reaches the power distribution result under the loading duration.

[0085] Specifically, the electric control signal is a signal that controls the corresponding pump to adjust the power. The specific type of the electric control signal can be set according to actual needs. For example, it can be a current control signal, which controls the opening of the electromagnetic valve of the corresponding pump, and then controls the displacement of the pump. When the current pressure of the pump is determined, the power of the pump can be adjusted by adjusting the displacement of the pump. At the same time, by adjusting the displacement of the pump, when the current speed of the engine is low, it can effectively prevent the engine from stalling, and when the current speed of the engine is high, it can effectively improve the operating efficiency of the operating machinery.

[0086] The first value of the electric control signal is determined based on the power distribution result of the corresponding pump, and is used to control the pump to perform power regulation to achieve the power distribution result of the pump. For each pump in the pump group, the first value of the electric control signal of the pump is generated according to the power distribution result of the pump. Taking the electric control signal as a current control signal as an example, the specific method of generating the first value of the electric control signal based on the power distribution result of the pump can be set according to actual needs. For example, the corresponding current control signal can be directly determined according to the second allocable torque, as shown in formula (2):

[0087]

[0088] In the formula, I i is the first value of the current control signal of the i-th pump; T i is the second distributable torque of the i-th pump; are the upper limit and lower limit of the current control signal of the i-th pump respectively; C i is the parameter data of the i-th pump, such as speed ratio, etc.

[0089] The second value of the electric control signal is used to characterize the current value of the electric control signal of the corresponding pump in the pump group. The current value of the electric control signal is, that is, the value of the electric control signal at the current moment. The loading slope of the electric control signal, that is, the slope of change of the value of the electric control signal in the process of loading the electric control signal to the corresponding pump, is used to characterize the loading time for the electric control signal to change from the second value to the first value. The greater the slope of the loading slope, the faster the slope of change of the value of the electric control signal, the shorter the loading time of the electric control signal, and the shorter the time for the pump power to reach the corresponding power distribution result.

[0090] The loading slopes of the pumps in the pump group can be the same or different. The specific method of determining the loading slope can be set according to actual needs. For example, the loading slope can be determined according to the current load rate of the engine, or according to constraints such as the loading time and the slope of the loading slope, or according to the size of the power distribution result.

[0091] After determining the loading slope of the electric control signal, the electric control signal can be loaded to the corresponding pump according to the loading slope, so that the power of the pump slowly reaches its power distribution result under the corresponding loading time, avoiding the electric control signal from loading too quickly and causing the engine to stall.

[0092] The embodiment of the present invention generates a first value of the electrical control signal of the pump based on the power distribution result of the pump, determines the loading slope of the electrical control signal, and loads the electrical control signal to the pump based on the loading slope so that the power of the pump reaches the power distribution result within the corresponding loading time, which can effectively avoid engine stalling due to excessive loading.

[0093] Based on any of the above embodiments, determining the loading slope of the electrical control signal includes:

[0094] Obtaining a current load rate of the engine;

[0095] A loading ramp of the electric control signal is determined based on a current load rate of the engine.

[0096] Specifically, the current load rate of the engine is the load rate of the engine at the current moment, that is, the ratio of the power generated by the engine at a certain speed to the maximum power that can be generated at the same speed. The current load rate of the engine can be collected through the CAN line.

[0097] The specific method of determining the loading slope of the electric control signal based on the current load rate of the engine can be set according to actual needs. For example, when the current load rate of the engine is greater than the preset load rate, the loading slope of the electric control signal is determined to be the first loading slope, and when the current load rate of the engine is less than or equal to the preset load rate, the loading slope of the electric control signal is determined to be the second loading slope; wherein the slope of the first loading slope is less than the slope of the second loading slope. The first loading slope and / or the second loading slope can be a pre-set fixed value, or can be obtained by matching the current load rate of the engine based on the corresponding relationship between the preset load rate and the loading slope.

[0098] The embodiment of the present invention obtains the current load rate of the engine and determines the loading slope of the electrical control signal based on the current load rate of the engine, thereby realizing segmented control of the loading slope of the electrical control signal of each pump in the pump group. This can effectively prevent the engine from stalling due to excessive loading without affecting the acceleration time.

[0099] The specific implementation process of the pump group power matching method of the present invention is described in detail below through an optional implementation method. Figure 2 As shown, the pump group power matching method in the embodiment of the present invention includes:

[0100] S201, obtaining a current speed of the engine, and determining an available torque of the engine based on the current speed;

[0101] S202, obtaining a fixed load of the working machine, and determining a loss torque of the engine based on the fixed load;

[0102] S203, obtaining the current pressure of each pump in the pump group, and determining the torque distribution ratio of each pump based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump;

[0103] S204, determining a first distributable torque of the pump group based on the available torque of the engine and the loss torque of the engine;

[0104] S205. Determine the second distributable torque of the pump based on the first distributable torque of the pump group and the torque distribution ratio of the pump, determine the power distribution result of the pump based on the second distributable torque and the current speed of the engine, and generate a first value of the current control signal of the pump according to the power distribution result; wherein the current control signal is used to load to the corresponding pump to control the pump for power regulation.

[0105] There is no order of precedence among step S201, step S202 and step S203, and there is no order of precedence between step S203 and step S204. After generating the first value of the current control signal, the process of loading the current control signal to the corresponding pump can be as follows: Figure 3 As shown, including:

[0106] S301, obtaining the current load rate of the engine; when the current load rate is greater than the preset load rate, executing step S302, otherwise, executing step S303;

[0107] S302, loading the current control signal to the corresponding pump based on the first loading slope; wherein the first loading slope is determined according to the corresponding relationship between the load rate of the engine and the loading slope;

[0108] S303 , loading the current control signal to the corresponding pump based on the second loading ramp; wherein the second loading ramp is preset.

[0109] The first loading ramp and the second loading ramp are respectively used to characterize the first loading duration and the second loading duration of the electrical control signal of the pump changing from the second value to the first value, and the second value is used to characterize the current value of the electrical control signal of the pump.

[0110] The pump group power matching device provided by the present invention is described below. The pump group power matching device described below and the pump group power matching method described above can be referred to each other. Figure 4 As shown, the pump group power matching device of the present invention comprises:

[0111] A first calculation module 401 is used to obtain a current rotation speed of the engine and determine a first distributable torque of the pump group based on the current rotation speed;

[0112] A second calculation module 402 is used to obtain the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure;

[0113] The third calculation module 403 is used to determine the second allocable torque of each pump based on the first allocable torque and the torque distribution ratio, and determine the power distribution result of each pump based on the second allocable torque and the current speed of the engine.

[0114] Based on the above embodiment, the first calculation module 401 is specifically used for:

[0115] determining an available torque of the engine based on a current speed of the engine;

[0116] acquiring a fixed load of the working machine, and determining a loss torque of the engine based on the fixed load;

[0117] The first distributable torque of the pump group is determined based on the available torque and the loss torque.

[0118] Based on any of the above embodiments, the second calculation module 402 is specifically used for:

[0119] Obtaining the rated displacement of each pump and the current working flag of each pump;

[0120] The torque distribution ratio of each pump is determined based on the current pressure of each pump, the rated displacement of each pump and the current working flag of each pump.

[0121] Based on any of the above embodiments, the second calculation module 402 is specifically used for:

[0122] Acquire the product of the current pressure of the target pump, the rated displacement of the target pump and the current working mark of the target pump as the first data of the target pump; wherein the target pump is any one pump in the pump group;

[0123] Based on the second data and the first data of the target pump, the torque distribution ratio of the target pump is determined; wherein the second data is the cumulative value of the first data of all the pumps in the pump group; the torque distribution ratio of the target pump is directly proportional to the first data, and inversely proportional to the second data.

[0124] Based on any of the above embodiments, the invention further includes a fourth calculation module, wherein the fourth calculation module is used to:

[0125] Acquiring a first value of an electrical control signal of the pump based on the power distribution result; the electrical control signal is used to control the adjustment of the power of the pump;

[0126] Determine a loading slope of the electrical control signal, wherein the loading slope is used to characterize the loading time length for the electrical control signal of the pump to change from a second value to the first value; wherein the second value is used to characterize the current value of the electrical control signal of the pump;

[0127] The electrical control signal is applied to the pump based on the loading ramp so that the power of the pump reaches the power distribution result under the loading duration.

[0128] Based on any of the foregoing embodiments, the fourth calculation module is specifically used for:

[0129] Obtaining a current load rate of the engine;

[0130] A loading ramp of the electric control signal is determined based on a current load rate of the engine.

[0131] The present invention also provides an operating machine, comprising: an engine, a pump group and a control device, wherein the control device is used to execute the pump group power matching method described in any of the above embodiments.

[0132] Specifically, the working machinery is engineering machinery such as cranes, excavators, etc. The pump group includes a plurality of pumps, and each pump in the pump group is driven by an engine.

[0133] Figure 5 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 5 As shown, the electronic device may include: a processor 501, a communications interface 502, a memory 503 and a communications bus 504, wherein the processor 501, the communications interface 502 and the memory 503 communicate with each other via the communications bus 504. The processor 501 may call the logic instructions in the memory 503 to execute the pump group power matching method, the method comprising: obtaining the current speed of the engine, and determining the first distributable torque of the pump group based on the current speed;

[0134] Acquire the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure;

[0135] Based on the first allocable torque and the torque distribution ratio, a second allocable torque of each pump is determined, and based on the second allocable torque and the current speed of the engine, a power distribution result of each pump is determined.

[0136] In addition, the logic instructions in the above-mentioned memory 503 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0137] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, the computer can execute the pump group power matching method provided by the above methods, the method comprising: obtaining a current speed of the engine, and determining a first distributable torque of the pump group based on the current speed;

[0138] Acquire the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure;

[0139] Based on the first allocable torque and the torque distribution ratio, a second allocable torque of each pump is determined, and based on the second allocable torque and the current speed of the engine, a power distribution result of each pump is determined.

[0140] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the above-mentioned pump group power matching method, the method comprising: obtaining a current speed of the engine, and determining a first distributable torque of the pump group based on the current speed;

[0141] Acquire the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure;

[0142] Based on the first allocable torque and the torque distribution ratio, a second allocable torque of each pump is determined, and based on the second allocable torque and the current speed of the engine, a power distribution result of each pump is determined.

[0143] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0144] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pump group power matching method, characterized in that: include: Acquire a current speed of the engine, and determine a first distributable torque of the pump group based on the current speed; Acquire the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure; Determining a second distributable torque of each pump based on the first distributable torque and the torque distribution ratio, and determining a power distribution result of each pump based on the second distributable torque and the current speed of the engine; Wherein, determining the torque distribution ratio of each pump in the pump group based on the current pressure includes: Obtaining the rated displacement of each pump and the current working flag of each pump; Determining the torque distribution ratio of each pump based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump; Determining the torque distribution ratio of each pump based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump includes: Acquire the product of the current pressure of the target pump, the rated displacement of the target pump and the current working mark of the target pump as the first data of the target pump; wherein the target pump is any one pump in the pump group; Based on the second data and the first data of the target pump, the torque distribution ratio of the target pump is determined; wherein the second data is the cumulative value of the first data of all the pumps in the pump group; the torque distribution ratio of the target pump is directly proportional to the first data, and inversely proportional to the second data.

2. The pump group power matching method according to claim 1, characterized in that: The determining of the first distributable torque of the pump group based on the current rotation speed comprises: determining an available torque of the engine based on a current speed of the engine; acquiring a fixed load of the working machine, and determining a loss torque of the engine based on the fixed load; The first distributable torque of the pump group is determined based on the available torque and the loss torque.

3. The pump group power matching method according to claim 1 or 2, characterized in that: After determining the power allocation result of each pump, the method further includes: Acquiring a first value of an electrical control signal of the pump based on the power distribution result; the electrical control signal is used to control the adjustment of the power of the pump; Determine a loading slope of the electrical control signal, wherein the loading slope is used to characterize the loading time length for the electrical control signal of the pump to change from a second value to the first value; wherein the second value is used to characterize the current value of the electrical control signal of the pump; The electrical control signal is applied to the pump based on the loading ramp so that the power of the pump reaches the power distribution result under the loading duration.

4. The pump group power matching method according to claim 3, characterized in that: The determining of the loading slope of the electrical control signal comprises: Obtaining a current load rate of the engine; A loading ramp of the electric control signal is determined based on a current load rate of the engine.

5. A pump group power matching device, characterized in that: include: a first calculation module, configured to obtain a current rotation speed of the engine, and determine a first distributable torque of the pump group based on the current rotation speed; A second calculation module is used to obtain the current pressure of each pump in the pump group, and determine the torque distribution ratio of each pump in the pump group based on the current pressure; a third calculation module, configured to determine a second allocable torque of each of the pumps based on the first allocable torque and the torque distribution ratio, and to determine a power distribution result of each of the pumps based on the second allocable torque and a current speed of the engine; The second calculation module is specifically used to determine the torque distribution ratio of each pump in the pump group based on the current pressure, including: Obtaining the rated displacement of each pump and the current working flag of each pump; Determining the torque distribution ratio of each pump based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump; The second calculation module is specifically used to determine the torque distribution ratio of each pump based on the current pressure of each pump, the rated displacement of each pump and the current working mark of each pump, including: Acquire the product of the current pressure of the target pump, the rated displacement of the target pump and the current working mark of the target pump as the first data of the target pump; wherein the target pump is any one pump in the pump group; Based on the second data and the first data of the target pump, the torque distribution ratio of the target pump is determined; wherein the second data is the cumulative value of the first data of all the pumps in the pump group; the torque distribution ratio of the target pump is directly proportional to the first data, and inversely proportional to the second data.

6. A working machine, characterized in that: include: An engine, a pump group and a control device, wherein the control device is used to execute the pump group power matching method as described in any one of claims 1 to 4.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the pump group power matching method as described in any one of claims 1 to 4 is implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the pump group power matching method as described in any one of claims 1 to 4 is implemented.

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