Control method and control device for pumping machinery and related equipment

Abstract

The invention discloses a control method and device for a pumping machine and related equipment, the pumping machine comprises an engine, a gearbox, a transfer case and a main oil pump which are connected in sequence, and the control method comprises the steps that the first rotating speed of the main oil pump and the second rotating speed of the engine are obtained; in a preset time period, under the condition that the ratio of the first rotating speed to the second rotating speed is larger than a pre-obtained early warning value, according to the magnitude relation between the first rotating speed and the preset overspeed alarm rotating speed of the main oil pump, the second rotating speed is adjusted, and / or the pumping action of the pumping machine is controlled, so that the first rotating speed is smaller than the maximum rotating speed value of the main oil pump, the highest rotating speed value is larger than a preset overspeed alarm rotating speed, and the early warning value is determined according to a preset first transmission ratio of the gearbox, a preset first gear speed ratio and a preset second transmission ratio of the transfer case. The invention can prevent wrong gear engagement and ensure that the rotating speed of the main oil pump is in a safe range.

Description

Technical Field

[0001] This application relates to the technical field of concrete pumping machinery control, and particularly to a control method, a control device and related equipment for pumping machinery. Background Art

[0002] In concrete pumping machinery (such as concrete pump trucks, truck-mounted pumps, etc.), the chassis power transmission mainly consists of an engine, a gearbox, a drive shaft, and a rear axle. The gearbox can transmit the engine speed to the drive shaft at different speed ratios to meet the vehicle speed requirements. At the same time, a power take-off box and a main oil pump need to be added to drive the main oil pump. Since the main oil pump will be damaged if its speed exceeds the maximum speed, before the equipment operates, the operator needs to select the correct working gear in the cab to ensure the normal speed of the oil pump.

[0003] Currently, the existing error prevention control methods in the industry mainly remind the operator to select the correct gear by pasting text labels at the gear lever in the cab. However, in actual operation scenarios, the operator may ignore the label content or misread the prompt due to factors such as high work intensity and distracted attention, resulting in hanging the wrong gear, and then the speed of the main oil pump exceeds the safe range, which easily leads to the risk of equipment damage. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a control method, a control device and related equipment for pumping machinery, so as to solve the problem that the existing error prevention control methods are likely to cause hanging the wrong gear, and then the speed of the main oil pump exceeds the safe range, which easily leads to the risk of equipment damage.

[0005] In a first aspect, the embodiments of this application provide a control method for pumping machinery. The pumping machinery includes an engine, a gearbox, a power take-off box, and a main oil pump that are connected in sequence. The control method includes:

[0006] Obtain a first speed of the main oil pump and a second speed of the engine;

[0007] Within a preset time period, when the ratio between the first speed and the second speed is greater than a pre-obtained warning value, adjust the second speed and / or control the pumping action of the pumping machinery according to the magnitude relationship between the first speed and the preset overspeed alarm speed of the main oil pump, so that the first speed is less than the maximum speed value of the main oil pump, where the maximum speed value is greater than the preset overspeed alarm speed, and the warning value is determined according to a preset first transmission ratio of the gearbox, a preset first gear speed ratio, and a preset second transmission ratio of the power take-off box.

[0008] In an embodiment of the present application, the first gear ratio includes a first overdrive gear ratio, and the first overdrive gear ratio is the largest gear ratio among multiple overdrive gear ratios of a transmission, and the warning value includes a first sub-warning value;

[0009] The first sub-warning value is determined by a first formula, and the first formula is:

[0010]

[0011] wherein, A is the first sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, i H6 is the first overdrive gear ratio, and i1 is the first transmission ratio.

[0012] In an embodiment of the present application, the preset overspeed alarm speed includes an oil pump overspeed alarm value and an overspeed pump stop value, and the overspeed pump stop value is greater than the overspeed alarm value;

[0013] When the ratio between the first speed and the second speed is greater than a pre-acquired warning value, according to the magnitude relationship between the first speed and the preset overspeed alarm speed of the main oil pump, adjusting the second speed and / or controlling the pumping action of the pumping machine includes:

[0014] When the ratio between the first speed and the second speed is greater than the first sub-warning value, if the first speed is greater than the overspeed alarm value and less than the overspeed pump stop value, then adjust the second speed to a third speed, the third speed is less than the second speed, and the third speed is a safe speed to avoid the speed of the main oil pump exceeding the maximum speed;

[0015] When the ratio between the first speed and the second speed is greater than the first sub-warning value, if the first speed is greater than the overspeed pump stop value, then control the pumping machine to stop the pumping action.

[0016] In an embodiment of the present application, when the ratio between the first speed and the second speed is greater than the first sub-warning value, and if the first speed is greater than the overspeed alarm value, before adjusting the second speed to the third speed, the method further includes:

[0017] Determine the third speed according to the maximum speed of the main oil pump, the second transmission ratio, and the minimum overdrive gear ratio of the transmission;

[0018] The third speed is determined by a second formula, and the second formula is:

[0019]

[0020] Wherein, X is the third rotational speed, N is the maximum rotational speed of the main oil pump, M is the safety buffer value of the main oil pump, i2 is the second transmission ratio, and i H7 is the second overspeed gear ratio, and the second overspeed gear ratio is the smallest gear ratio among the multiple overspeed gear ratios of the gearbox.

[0021] In the embodiment of the present application, when the ratio between the first rotational speed and the second rotational speed is greater than a pre-acquired warning value, according to the magnitude relationship between the second rotational speed and the preset overspeed alarm rotational speed of the main oil pump, adjusting the second rotational speed and / or controlling the pumping action of the pumping machine includes:

[0022] When the ratio between the first rotational speed and the second rotational speed is greater than the warning value, if it is detected that the pumping machine has not stopped the pumping action and the engine is not restricted from accelerating, then according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, adjusting the second rotational speed and / or controlling the pumping action of the pumping machine.

[0023] In the embodiment of the present application, the first gear ratio includes a first low-speed gear ratio, and the warning value includes a second sub-warning value;

[0024] The second sub-warning value is determined by a third formula, and the third formula is:

[0025]

[0026] Wherein, B is the second sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, and i L4 is the first low-speed gear ratio, and i1 is the first transmission ratio.

[0027] In the embodiment of the present application, after obtaining the first rotational speed of the main oil pump and the second rotational speed of the engine, the method further includes:

[0028] Generating a low-speed alarm signal when the ratio between the first rotational speed and the second rotational speed is less than the second sub-warning value within a preset time period.

[0029] In the embodiment of the present application, after obtaining the first rotational speed of the main oil pump and the second rotational speed of the engine, before adjusting the second rotational speed and / or controlling the pumping action of the pumping machine according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump when the ratio between the first rotational speed and the second rotational speed is greater than a pre-acquired warning value within the preset time period, the method further includes:

[0030] When the ratio between the first rotational speed and the second rotational speed is not equal to the ratio of the second transmission ratio to the first transmission ratio, it is determined that the gear of the pumping machine is incorrect, and it is judged whether the ratio between the first rotational speed and the second rotational speed is greater than the warning value within a preset time period.

[0031] In a second aspect, an embodiment of the present application provides a control device for a pumping machine. The control device includes:

[0032] An acquisition module, configured to acquire a first rotational speed of the main oil pump and a second rotational speed of the engine;

[0033] An adjustment module, configured to, within a preset time period, when the ratio between the first rotational speed and the second rotational speed is greater than a pre-acquired warning value, adjust the second rotational speed and / or control the pumping action of the pumping machine according to the magnitude relationship between the first rotational speed and a preset overspeed alarm rotational speed of the main oil pump, so that the first rotational speed is less than the maximum rotational speed value of the main oil pump, where the maximum rotational speed value is greater than the preset overspeed alarm rotational speed, and the warning value is determined according to a preset first transmission ratio of the gearbox, a preset first gear speed ratio, and a preset second transmission ratio of the transfer case.

[0034] In a third aspect, an embodiment of the present application provides an electronic device. The electronic device includes: a processor and a memory storing computer program instructions;

[0035] When the processor executes the computer program instructions, the control method for a pumping machine according to any item of the first aspect is implemented.

[0036] In a fourth aspect, an embodiment of the present application provides a pumping machine. The pumping machine includes:

[0037] The electronic device according to the third aspect;

[0038] The engine, the gearbox, the transfer case, and the main oil pump that are connected in sequence.

[0039] In a fifth aspect, an embodiment of the present application provides a machine-readable storage medium. Instructions are stored on the machine-readable storage medium, and the instructions are used to cause the machine to execute the control method for a pumping machine according to any item of the first aspect.

[0040] In the control method for a pumping machine of the present application, when the ratio between the first speed of the engine and the second speed of the main oil pump is greater than the warning value, the first speed can be adjusted and / or the pumping action of the pumping machine can be controlled according to the magnitude relationship between the second speed and the preset overspeed alarm speed of the main oil pump. Among them, by adjusting the first speed and controlling the pumping action of the pumping machine, it can be ensured that the second speed of the main oil pump in the pumping machine is always less than the maximum speed value, thereby preventing the main oil pump speed from exceeding the safe range, eliminating the need for the operator to select the correct gear according to the text label, avoiding the problem of incorrect gears caused by manual operation errors, and further reducing the risk of equipment damage.

[0041] Other features and advantages of the embodiments of the present application will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. In the drawings:

[0043] Figure 1 Schematically shows a flowchart of a control method for a pumping machine according to an embodiment of the present application;

[0044] Figure 2 Schematically shows a structural diagram of a pumping machine according to an embodiment of the present application;

[0045] Figure 3 Schematically shows a flowchart of the hierarchical safety protection control process of the main oil pump according to an embodiment of the present application;

[0046] Figure 4 Schematically shows a structural diagram of a control device for a pumping machine according to an embodiment of the present application;

[0047] Figure 5 Schematically shows a structural diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiments of the present application, and is not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0049] It should be noted that in the technical solution of this application, the acquisition, transmission, storage, use, processing, etc. of data all comply with the relevant provisions of laws and regulations. In the embodiments of this application, some existing industry solutions such as certain software, components, models, etc. may be mentioned. They should be regarded as exemplary. The purpose is only to illustrate the feasibility in the implementation of the technical solution of this application, but it does not mean that the applicant has already or necessarily used this solution.

[0050] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of this application, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of this application, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by this application.

[0052] Figure 1 A schematic flow chart of a control method for a pumping machine according to an embodiment of the present application is schematically shown. As Figure 1 shown, the embodiments of the present application provide a control method for a pumping machine, and the method may include the following steps.

[0053] Step 101, obtain the first rotational speed of the main oil pump and the second rotational speed of the engine.

[0054] In the embodiments of the present application, as Figure 2 shown, Figure 2 is a schematic structural diagram of a pumping machine. The pumping machine includes an engine, a gearbox, a power take-off box, and a main oil pump (for driving the pumping mechanism to perform pumping operations) connected in sequence. Among them, the gearbox is connected to the power take-off box through a transmission shaft. In addition, the pumping machine also includes a controller.

[0055] The second speed of the engine is the real-time speed of the engine, which can be determined by the product of the actual engine speed frequency signal p1 and the engine speed frequency ratio k1. Among them, the engine speed frequency ratio can be automatically learned by the controller of the pumping machinery by detecting the current engine speed of the cab instrument and the actual engine speed frequency value at this instrument engine speed. Alternatively, the second speed can also be obtained by the controller directly reading the CAN message signal of the engine ECU control unit of the pumping machinery.

[0056] The first speed of the main oil pump is the real-time speed of the main oil pump, which can be determined by the product of the actual main oil pump speed frequency signal p3 and the main oil pump speed frequency ratio k1. Alternatively, the first speed can also be obtained by converting the drive shaft speed n2 obtained from the drive shaft frequency signal and the transfer case speed ratio, or obtained by the sensor on the main oil pump.

[0057] Step 102: Within a preset time period, when the ratio between the first speed and the second speed is greater than the pre-obtained warning value, adjust the second speed and / or control the pumping action of the pumping machinery according to the magnitude relationship between the first speed and the preset overspeed alarm speed of the main oil pump, so that the second speed is less than the maximum speed value of the main oil pump.

[0058] In the embodiment of the present application, the preset time period can be 3s, 4s or 5s. Preferably, it can be 4s in this embodiment. In order to leave a certain buffer space for the control process and avoid taking measures when the main oil pump is close to the maximum speed, resulting in untimely control, the maximum speed value needs to be greater than the preset overspeed alarm speed. Among them, the maximum speed value is the maximum speed value allowed by the main oil pump.

[0059] The warning value is determined according to the preset first transmission ratio of the gearbox, the preset first gear speed ratio, and the preset second transmission ratio of the transfer case. Among them, the warning value includes the first warning value during the overspeed process of the pumping machinery and the second warning value during the low-speed process. The first transmission ratio, the first gear speed ratio, and the second transmission ratio can all be set through the display screen of the pumping machinery.

[0060] Among them, the first warning value is determined by the first formula, and the first formula is:

[0061]

[0062] Among them, A is the first sub-warning value, K is the preset coefficient, i2 is the second transmission ratio, i H6 is the first overspeed gear speed ratio, and i1 is the first transmission ratio.

[0063] The second sub-warning value is determined by the third formula, and the third formula is:

[0064]

[0065] Wherein, B is the second sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, and i L4 is the first low-speed gear ratio, and i1 is the first transmission ratio.

[0066] It should be noted that the transmission includes multiple gear ratios, specifically, it can be a low-speed gear ratio, a normal gear ratio, and an over-speed gear ratio. Among them, both the low-speed gear ratio and the over-speed gear ratio are multiple, and the gear ratios of the low-speed gear ratio, the normal gear ratio, and the over-speed gear ratio decrease in sequence. And the first over-speed gear ratio is the largest gear ratio among multiple over-speed gear ratios, and the first low-speed gear ratio can be the largest gear ratio among multiple low-speed gear ratios. As an example, the multiple gear ratios of the transmission can be i L1 , i L2 , i L3 , i L4 , i1, i H6 , i H7 . Among them, i1 is the normal gear ratio, and i L1 , i L2 , i L3 , i L4 are the low-speed gear ratios, and i H6 , i H7 are the over-speed gear ratios. The first over-speed gear ratio is i H6 , and the first low-speed gear ratio is i L4 .

[0067] In order to make the first rotational speed less than the maximum rotational speed value of the main oil pump, therefore, when the first rotational speed is greater than the preset over-speed alarm rotational speed of the main oil pump, the second rotational speed is adjusted and / or the pumping action of the pumping machine is controlled. Specifically, the second rotational speed can be reduced and / or the pumping action of the pumping machine can be controlled to stop. Among them, the pumping action can be to stop pumping materials such as concrete by controlling the closing of the valves of the pumping system.

[0068] In addition, in an embodiment, after adjusting the second rotational speed and / or controlling the pumping action of the pumping machine according to the magnitude relationship between the first rotational speed and the preset over-speed alarm rotational speed of the main oil pump to make the first rotational speed less than the maximum rotational speed value of the main oil pump, the method further includes:

[0069] When the ratio between the first rotational speed and the second rotational speed is less than a pre-acquired first safety value, stop adjusting the second rotational speed and / or controlling the pumping action of the pumping machine, where the first safety value is determined according to the fourth formula;

[0070] The fourth formula is:

[0071]

[0072] C is the first safety value, Z is the preset first coefficient, and the first coefficient is less than the preset coefficient, i2 is the second transmission ratio, i L4 is the first low-speed gear ratio, and i1 is the first transmission ratio.

[0073] When it is detected that the ratio between the first speed and the second speed is less than the first safety value, it means that the pumping machinery is in a normal gear speed ratio. Therefore, the overspeed alarm signal of the pumping machinery is released, and the adjustment of the second speed and / or the pumping action is stopped, thereby ensuring the normal operation of the pumping machinery.

[0074] In this embodiment, when the ratio between the first speed of the main oil pump and the second speed of the engine is greater than the warning value, the second speed can be adjusted and / or the pumping action of the pumping machinery can be controlled according to the relationship between the first speed and the preset overspeed alarm speed of the main oil pump. Specifically, by adjusting the second speed and controlling the pumping action of the pumping machinery, it can be ensured that the first speed of the main oil pump in the pumping machinery is always less than the maximum speed value, thereby preventing the main oil pump speed from exceeding the safety range. There is no need for the operator to select the correct gear according to the text mark, which avoids the problem of wrong gear caused by manual operation errors, thereby reducing the risk of equipment damage.

[0075] In one embodiment of the present application, when the ratio between the first speed and the second speed is greater than the pre-acquired warning value, adjusting the second speed and / or controlling the pumping action of the pumping machine according to the magnitude relationship between the first speed and a preset overspeed alarm speed of the main oil pump includes:

[0076] In the case where the ratio between the first speed and the second speed is greater than the first sub-warning value, if the first speed is greater than the overspeed alarm value and less than the overspeed pump stop value, the second speed is adjusted to a third speed, the third speed is less than the second speed, and the third speed is a safe speed to prevent the speed of the main oil pump from exceeding the maximum speed;

[0077] In the case where the ratio between the first rotational speed and the second rotational speed is greater than the first sub-warning value, if the first rotational speed is greater than the overspeed pump stop value, the pumping machine is controlled to stop the pumping action.

[0078] In this embodiment, the preset overspeed alarm speed includes an oil pump overspeed alarm value and an overspeed pump stop value, and the overspeed pump stop value is greater than the overspeed alarm value.

[0079] When the ratio between the first speed of the main oil pump and the second speed of the engine is greater than the first sub-warning value, and the first speed of the main oil pump is greater than the overspeed alarm value, the controller will adjust the second speed of the engine to the third speed, so that even if the operator shifts into the overspeed gear with the smallest transmission ratio, the oil pump speed is ensured not to exceed the maximum speed, thereby dynamically protecting the oil pump speed from overspeed during the pumping operation. Among them, the third speed is less than the second speed, and the third speed is obtained through precise calculation. The purpose is to prevent the speed of the main oil pump from exceeding the maximum speed, which belongs to the safe speed. When the speed of the main oil pump is close to but not yet at the dangerous level, by reducing the engine speed, the speed of the main oil pump will also decrease accordingly, thereby preventing it from further rising to the maximum speed and realizing the preliminary protection of the main oil pump.

[0080] When the ratio between the first speed of the main oil pump and the second speed of the engine is greater than the first sub-warning value, and at the same time the first speed of the main oil pump is greater than the overspeed pump stop value, this indicates that the speed of the main oil pump has reached a very dangerous level. At this time, the controller will immediately control the pumping machinery to stop the pumping action. For example, by closing the relevant valves of the pumping system, cutting off the power transmission, etc., quickly stop the pumping of materials to prevent the main oil pump from continuing to operate at too high a speed and avoid serious damage caused by excessive overspeed. At the same time, an alarm signal is sent to remind the operator that the equipment has a serious abnormal situation. This control method can take emergency measures in a timely manner when the main oil pump faces the risk of serious overspeed and ensure the safety of the equipment.

[0081] In this embodiment, through the strategy of hierarchical protection, different control measures are taken according to the different dangerous degrees of the main oil pump speed. When the main oil pump speed exceeds the overspeed alarm value but does not reach the overspeed pump stop value, flexible control is carried out by adjusting the engine speed, which can not only avoid the overspeed of the main oil pump but also maintain the continuity of the pumping operation to a certain extent; when the main oil pump speed exceeds the overspeed pump stop value, the pumping action is immediately stopped, which can effectively prevent the equipment from being damaged due to serious overspeed and greatly improve the safety and reliability of the main oil pump.

[0082] In an embodiment of the present application, when the ratio between the first speed and the second speed is greater than the first sub-warning value, if the first speed is greater than the overspeed alarm value, before adjusting the second speed to the third speed, the method further includes:

[0083] Determine the third speed according to the maximum speed of the main oil pump, the second transmission ratio, and the minimum overspeed gear ratio of the transmission;

[0084] The third speed is determined by the second formula, and the second formula is:

[0085]

[0086] Wherein, X is the third rotational speed, N is the maximum rotational speed of the main oil pump, M is the safety buffer value of the main oil pump, i2 is the second transmission ratio, and i H7 is the second overspeed gear ratio, and the second overspeed gear ratio is the smallest gear ratio among the multiple overspeed gear ratios of the gearbox. Among them, the safety buffer value is used to avoid overshoot of the main oil pump, that is, to avoid the rotational speed of the main oil pump exceeding the maximum rotational speed. This safety buffer value can be adjusted according to the speed regulation characteristics of the main oil pump. In the case of better speed regulation characteristics, the safety buffer value can be smaller; in the case of poorer speed regulation characteristics, the safety buffer value can be larger.

[0087] In this embodiment, the third rotational speed is the safety rotational speed of the engine corresponding to the case where the rotational speed of the main oil pump does not exceed the maximum rotational speed. That is, when the rotational speed of the engine reaches within the third rotational speed from the second rotational speed, it indicates that the rotational speed of the main oil pump is normal.

[0088] In an embodiment of the present application, when the ratio between the first rotational speed and the second rotational speed is greater than a pre-acquired warning value, according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, the second rotational speed is adjusted and / or the pumping operation of the pumping machinery is controlled, including:

[0089] When the ratio between the first rotational speed and the second rotational speed is greater than the warning value, if it is detected that the pumping machinery has not stopped the pumping operation and the engine has not been restricted from accelerating, then according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, the second rotational speed is adjusted and / or the pumping operation of the pumping machinery is controlled.

[0090] In this embodiment, when the ratio between the first rotational speed and the second rotational speed is greater than the warning value, the controller needs to further detect whether the pumping machinery has stopped the pumping operation and whether the engine has been restricted from accelerating. If it is detected that the pumping machinery has not stopped the pumping operation and the engine has not been restricted from accelerating, then corresponding control measures are taken according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump. Among them, judging "whether to restrict the pumping operation and whether the engine has been restricted from accelerating" can be configured on the display screen of the pumping machinery, and after the user configures it according to the usage habit, the display screen will give the instruction to the controller.

[0091] Figure 3 is a schematic flow chart of the hierarchical safety protection control process of the main oil pump. As Figure 3 shown, the specific process of this flow is:

[0092] In the case where the pumping machinery has an "overspeed - wrong gear shift alarm", it is judged whether to restrict pumping and pumping automatic acceleration, that is, in the case where the ratio between the first rotational speed and the second rotational speed is greater than the warning value in the above embodiment, it is detected whether the pumping machinery needs to stop the pumping operation and whether the engine needs to be restricted from accelerating.

[0093] When the pumping action needs to be stopped and the engine needs to be restricted from accelerating, directly restrict the pumping action and press the pumping button, then the controller controls the engine not to accelerate, that is, stop the pumping action and restrict the engine from accelerating in the above embodiments.

[0094] When the pumping action does not need to be stopped and the engine does not need to be restricted from accelerating, detect whether the actual speed of the main pump is greater than the oil pump overspeed alarm value (N - 250) and the overspeed pump stop value N, that is, judge the magnitude relationship between the second speed and the preset overspeed alarm speed of the main oil pump in the above embodiments, where 250 is the safety buffer value in this embodiment.

[0095] When it is less than the oil pump overspeed alarm value (N - 250), the pumping action is not restricted, and the controller can control the engine speed to increase or decrease before the actual speed of the main oil pump reaches the oil pump overspeed alarm value.

[0096] When it is greater than the oil pump overspeed alarm value (N - 250), the controller stops sending the engine acceleration command, and locks the engine speed to a safety value X for pumping operation, and the oil pump overspeed alarm value is prompted on the display screen, that is, adjust the second speed to the third speed in the above embodiments.

[0097] When the actual speed of the main oil pump is greater than the oil pump overspeed pump stop value, the controller issues a pump stop command to stop the pumping operation, and the oil pump overspeed pump stop is prompted on the display screen, that is, control the pumping machinery to stop the pumping action in the above embodiments.

[0098] In this embodiment, according to different working conditions and the speed of the main oil pump, the control strategy can be flexibly adjusted, and together with the subsequent corresponding control measures, the hierarchical protection logic of the main oil pump is realized, meeting the different operating habits of different operators, and at the same time having strong adaptability, being applicable to various types of pumping machinery.

[0099] In an embodiment of the present application, after obtaining the first speed of the main oil pump and the second speed of the engine, the method further includes:

[0100] Within a preset time period, when the ratio between the first speed and the second speed is less than the second sub-warning value, generate a low-speed alarm signal.

[0101] In this embodiment, the process of obtaining the second sub-warning value is as in the above embodiments, and this embodiment will not be elaborated here.

[0102] When the ratio between the first speed and the second speed is less than the second sub-warning value, it indicates that the pumping machinery may be in a low-speed working state, and at this time, a low-speed alarm signal is generated.

[0103] If a low-speed alarm signal appears, there is no risk of overspeed damage to the main oil pump, but the equipment will be in a low-efficiency working condition. At this time, the indicator light flashes, indicating that the current equipment can perform pumping operations, but the operation efficiency will be greatly reduced.

[0104] In addition, the low-speed alarm signal can be output in various ways. For example, an indicator light is set on the cab instrument panel of the pumping machinery. When the low-speed alarm signal is generated, the indicator light lights up and flashes, and at the same time, it can be combined with a sound alarm to remind the operator to pay attention. After receiving the alarm signal, the operator can check the working state of the equipment, check whether there are problems such as incorrect gear shifting and equipment failures, and take corresponding adjustment measures, such as changing to a suitable gear, checking components such as the engine and transmission.

[0105] In another embodiment of the present application, within a preset time period, when the ratio between the first rotational speed and the second rotational speed is less than the second sub-warning value, after generating the low-speed alarm signal, the method further includes:

[0106] When the ratio between the first rotational speed and the second rotational speed is greater than or equal to a pre-obtained second safety value, stop generating the low-speed alarm signal, where the second safety value is determined according to the fifth formula;

[0107] The fifth formula is:

[0108]

[0109] D is the second safety value, Z is a preset first coefficient, and the first coefficient is less than the preset coefficient, i2 is the second transmission ratio, i L4 is the first low-speed gear ratio, and i1 is the first transmission ratio.

[0110] Through the second safety value, it can be determined whether the rotational speed of the main oil pump is within the normal rotational speed, preventing the long-term low-speed alarm signal from interfering with the operator's operation and improving the operation efficiency.

[0111] In this embodiment, it is possible to monitor the ratio of the engine speed to the main oil pump speed in real time, and send an alarm signal in a timely manner when the pumping machinery is in a low-speed and low-efficiency working state, enabling the operator to quickly understand the operating status of the equipment, take measures for adjustment in a timely manner, avoid being in a low-efficiency working state for a long time, and improve the work efficiency.

[0112] In one embodiment of the present application, after obtaining the first rotational speed of the main oil pump and the second rotational speed of the engine, within a preset time period, when the ratio between the first rotational speed and the second rotational speed is greater than the pre-obtained warning value, before adjusting the second rotational speed and / or controlling the pumping action of the pumping machinery according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, the method further includes:

[0113] When the ratio between the first rotational speed and the second rotational speed is not equal to the ratio between the second transmission ratio and the first transmission ratio, it is determined that the gear of the pumping machine is incorrect, and it is judged whether the ratio between the first rotational speed and the second rotational speed is greater than the warning value within a preset time period.

[0114] In this embodiment, before controlling the rotational speed of the main oil pump, it is also necessary to determine whether the pumping machine has engaged the wrong gear. Only when the gear of the pumping machine is incorrect can it be further determined whether the rotational speed of the main oil pump is too fast or too slow.

[0115] The first transmission ratio is determined by the ratio between the actual rotational speed of the engine and the actual rotational speed of the transmission shaft, that is, the ratio between the second rotational speed and the actual rotational speed of the transmission shaft. The second transmission ratio is determined by the ratio between the actual rotational speed of the main oil pump and the actual rotational speed of the transmission shaft, that is, the ratio between the first rotational speed and the actual rotational speed of the transmission shaft. Thus, it can be seen that if the pumping operation is carried out in the correct working gear, theoretically, there is a ratio between the first rotational speed and the second rotational speed that is equal to the ratio between the second transmission ratio and the first transmission ratio. If the ratio between the first rotational speed and the second rotational speed is not equal to the ratio between the second transmission ratio and the first transmission ratio, it indicates that the pumping machine has engaged the wrong gear and needs to be further adjusted to prevent the main oil pump from running at an excessive speed or a low speed.

[0116] In this embodiment, by determining whether the pumping machine has engaged the wrong gear, it is further determined whether to control the rotational speed of the main oil pump, ensuring the safety of the pumping machine during operation.

[0117] Figure 4 FIG. shows a schematic structural diagram of a control device for a pumping machine provided in another embodiment of the present application. For the sake of simplicity, only the parts related to the embodiments of the present application are shown.

[0118] Refer to Figure 4 , the control device 400 for the pumping machine may include:

[0119] An acquisition module 401, configured to acquire the first rotational speed of the main oil pump and the second rotational speed of the engine;

[0120] An adjustment module 402, configured to, within a preset time period, when the ratio between the first rotational speed and the second rotational speed is greater than a pre-acquired warning value, adjust the second rotational speed and / or control the pumping action of the pumping machine according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, so that the first rotational speed is less than the maximum rotational speed value of the main oil pump, where the maximum rotational speed value is greater than the preset overspeed alarm rotational speed, and the warning value is determined according to the preset first transmission ratio of the gearbox, the preset first gear speed ratio, and the preset second transmission ratio of the transfer case.

[0121] Optionally, the first gear ratio includes a first overdrive gear ratio, which is the largest gear ratio among multiple overdrive gear ratios of the transmission, and the warning value includes a first sub-warning value;

[0122] The first sub-warning value is determined by a first formula, and the first formula is:

[0123]

[0124] where A is the first sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, i H6 is the first overdrive gear ratio, and i1 is the first transmission ratio.

[0125] Optionally, the adjustment module 402 includes:

[0126] An adjustment sub-module, configured to, when the ratio between the first rotational speed and the second rotational speed is greater than the first sub-warning value, if the first rotational speed is greater than the overspeed alarm value and less than the overspeed pump stop value, adjust the second rotational speed to a third rotational speed, where the third rotational speed is less than the second rotational speed, and the third rotational speed is a safe rotational speed to avoid the rotational speed of the main oil pump exceeding the maximum rotational speed;

[0127] A control sub-module, configured to, when the ratio between the first rotational speed and the second rotational speed is greater than the first sub-warning value, if the first rotational speed is greater than the overspeed pump stop value, control the pumping machine to stop the pumping operation.

[0128] Optionally, the control device 400 for the pumping machine is further specifically configured to:

[0129] Determine the third rotational speed according to the maximum rotational speed of the main oil pump, the second transmission ratio, and the minimum overdrive gear ratio of the transmission;

[0130] The third rotational speed is determined by a second formula, and the second formula is:

[0131]

[0132] where X is the third rotational speed, N is the maximum rotational speed of the main oil pump, i2 is the second transmission ratio, i H7 is

[0133] the second overdrive gear ratio, and the second overdrive gear ratio is the smallest gear ratio among multiple overdrive gear ratios of the transmission.

[0134] Optionally, the adjustment module 402 is specifically configured to:

[0135] When the ratio between the first rotational speed and the second rotational speed is greater than the warning value, if it is detected that the pumping machine has not stopped the pumping action and the engine has not been restricted from accelerating, then according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, the second rotational speed is adjusted and / or the pumping action of the pumping machine is controlled.

[0136] Optionally, the first gear ratio includes a first low-speed gear ratio, and the warning value includes a second sub-warning value;

[0137] The second sub-warning value is determined by a third formula, and the third formula is:

[0138]

[0139] where B is the second sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, i L4 is the first low-speed gear ratio, and i1 is the first transmission ratio.

[0140] Optionally, the control device 400 for the pumping machine is further specifically configured to:

[0141] Generate a low-speed alarm signal within a preset time period when the ratio between the first rotational speed and the second rotational speed is less than the second sub-warning value.

[0142] Figure 5 FIG. shows a schematic hardware structure diagram of an electronic device provided in an embodiment of the present application.

[0143] The device may include a processor 501 and a memory 502 storing program instructions.

[0144] When the processor 501 executes the program, it implements the steps in any of the above method embodiments.

[0145] Exemplarily, the program may be divided into one or more modules / units, and one or more modules / units are stored in the memory 502 and executed by the processor 501 to complete the present application. One or more modules / units may be a series of program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the program in the device.

[0146] Specifically, the above-mentioned processor 501 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured as one or more integrated circuits implementing the embodiments of the present application.

[0147] The memory 502 may include a mass storage for data or instructions. By way of example and not limitation, the memory 502 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 502 may include removable or non-removable (or fixed) media. Where appropriate, the memory 502 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, the memory 502 is a non-volatile solid-state memory.

[0148] The memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory includes one or more tangible (non-transitory) readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of the present disclosure.

[0149] The processor 501 reads and executes the program instructions stored in the memory 502 to implement any of the methods in the above embodiments.

[0150] In one example, the electronic device may further include a communication interface 503 and a bus 510. Among them, the processor 501, the memory 502, and the communication interface 503 are connected through the bus 510 to complete communication with each other.

[0151] The communication interface 503 is mainly used to implement communication between the various modules, devices, units, and / or devices in the embodiments of the present application.

[0152] The bus 510 includes hardware, software, or both, and couples the components of the online data flow metering device to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses or a combination of two or more of these. Where appropriate, the bus 510 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0153] In addition, in combination with the method in the above embodiments, the embodiments of the present application can be implemented by providing a storage medium. Program instructions are stored on the storage medium; when the program instructions are executed by a processor, any one of the methods in the above embodiments is implemented.

[0154] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement each process of the above method embodiments, and can achieve the same technical effects. To avoid repetition, it will not be described in detail here.

[0155] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-a-chip, etc.

[0156] The embodiments of the present application provide a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement each process of the above method embodiments, and can achieve the same technical effects. To avoid repetition, it will not be described in detail here.

[0157] It should be clear that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, the detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated. Those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present application.

[0158] The functional modules shown in the above structural block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, and so on. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave over a transmission medium or a communication link. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical discs, hard disks, fiber optic media, radio frequency (RF) links, and so on. The code segment can be downloaded via a computer network such as the Internet, an intranet, and so on.

[0159] It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be executed in the order mentioned in the embodiments, can be different from the order in the embodiments, or several steps can be executed simultaneously.

[0160] As described above with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and program products according to embodiments of the present disclosure. It should be understood that each block in the flowchart and / or block diagram, and the combination of blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to generate a machine such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more blocks of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It is also understood that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can also be implemented by dedicated hardware that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0161] The above is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. A control method for a pumping machine, characterized in that, The pumping machine includes an engine, a gearbox, a power take-off box, and a main oil pump connected in sequence. The control method includes: Obtaining a first speed of the main oil pump and a second speed of the engine; Within a preset time period, when the ratio between the first speed and the second speed is greater than a pre-obtained warning value, according to the magnitude relationship between the first speed and a preset overspeed alarm speed of the main oil pump, adjusting the second speed and / or controlling the pumping action of the pumping machine, so that the first speed is less than the maximum speed value of the main oil pump, where the maximum speed value is greater than the preset overspeed alarm speed, and the warning value is determined according to a preset first transmission ratio of the gearbox, a preset first gear speed ratio, and a preset second transmission ratio of the power take-off box.

2. The method according to claim 1, wherein The first gear speed ratio includes a first overspeed gear speed ratio, and the first overspeed gear speed ratio is the largest gear speed ratio among multiple overspeed gear speed ratios of the gearbox. The warning value includes a first sub-warning value; The first sub-warning value is determined by a first formula, and the first formula is: Among them, A is the first sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, and i H6 is the first over-speed gear ratio, and i1 is the first transmission ratio.

3. The method according to claim 2, wherein The preset overspeed alarm speed includes an oil pump overspeed alarm value and an overspeed pump stop value, and the overspeed pump stop value is greater than the overspeed alarm value; When the ratio between the first speed and the second speed is greater than the pre-obtained warning value, according to the magnitude relationship between the first speed and the preset overspeed alarm speed of the main oil pump, adjusting the second speed and / or controlling the pumping action of the pumping machine includes: When the ratio between the first speed and the second speed is greater than the first sub-warning value, if the first speed is greater than the overspeed alarm value and less than the overspeed pump stop value, adjusting the second speed to a third speed, the third speed is less than the second speed, and the third speed is a safe speed to avoid the speed of the main oil pump exceeding the maximum speed; When the ratio between the first speed and the second speed is greater than the first sub-warning value, if the first speed is greater than the overspeed pump stop value, controlling the pumping machine to stop the pumping action.

4. The method according to claim 3, wherein Before adjusting the second speed to the third speed when the ratio between the first speed and the second speed is greater than the first sub-warning value and the first speed is greater than the overspeed alarm value, the method further includes: Determining the third speed according to the maximum speed of the main oil pump, the second transmission ratio, and the minimum overspeed gear ratio of the gearbox; The third speed is determined by a second formula, and the second formula is: Wherein, X is the third rotational speed, N is the highest rotational speed of the main oil pump, M is the safety buffer value of the main oil pump, i2 is the second transmission ratio, and i H7 is the second overdrive gear ratio, and the second overdrive gear ratio is the smallest gear ratio among the multiple overdrive gear ratios of the gearbox.

5. The method according to claim 1, wherein When the ratio between the first speed and the second speed is greater than the pre-obtained warning value, according to the magnitude relationship between the second speed and the preset overspeed alarm speed of the main oil pump, adjusting the second speed and / or controlling the pumping action of the pumping machine includes: When the ratio between the first rotational speed and the second rotational speed is greater than the warning value, if it is detected that the pumping machine has not stopped the pumping operation and the engine has not been restricted from accelerating, then according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, the second rotational speed is adjusted and / or the pumping operation of the pumping machine is controlled.

6. The method according to claim 1, wherein The first gear ratio includes a first low-speed gear ratio, and the warning value includes a second sub-warning value; The second sub-warning value is determined by a third formula, and the third formula is: Wherein, B is the second sub-warning value, K is a preset coefficient, i2 is the second transmission ratio, i L4 is the first low-speed gear ratio, and i1 is the first transmission ratio.

7. The method according to claim 6, wherein After obtaining the first rotational speed of the main oil pump and the second rotational speed of the engine, the method further includes: Within a preset time period, when the ratio between the first rotational speed and the second rotational speed is less than the second sub-warning value, a low-speed alarm signal is generated.

8. The method according to claim 1, wherein After obtaining the first rotational speed of the main oil pump and the second rotational speed of the engine, before adjusting the second rotational speed and / or controlling the pumping operation of the pumping machine according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump when the ratio between the first rotational speed and the second rotational speed is greater than a pre-obtained warning value within the preset time period, the method further includes: When the ratio between the first rotational speed and the second rotational speed is not equal to the ratio between the second transmission ratio and the first transmission ratio, it is determined that the gear of the pumping machine is incorrect, and it is judged whether the ratio between the first rotational speed and the second rotational speed is greater than the warning value within a preset time period.

9. A control device for a pumping machine, characterized in that, The control device includes: An acquisition module, configured to acquire the first rotational speed of the main oil pump and the second rotational speed of the engine; An adjustment module, configured to, within a preset time period, when the ratio between the first rotational speed and the second rotational speed is greater than a pre-obtained warning value, adjust the second rotational speed and / or control the pumping operation of the pumping machine according to the magnitude relationship between the first rotational speed and the preset overspeed alarm rotational speed of the main oil pump, so that the first rotational speed is less than the maximum rotational speed value of the main oil pump, where the maximum rotational speed value is greater than the preset overspeed alarm rotational speed, and the warning value is determined according to a preset first transmission ratio of the gearbox, a preset first gear ratio, and a preset second transmission ratio of the transfer case.

10. An electronic device, characterized in that, The electronic device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the control method for a pumping machine as described in any one of claims 1-8 is implemented.

11. A pumping machine, characterized in that, The pumping machine includes: The electronic device according to claim 10; The engine, the gearbox, the transfer case, and the main oil pump that are connected in sequence.

12. A machine-readable storage medium, characterized in that, Instructions are stored on the machine-readable storage medium, and the instructions are used to cause the machine to execute the control method for a pumping machine as described in any one of claims 1 to 8.

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