Quartering hammer flow calibration device

Abstract

The utility model relates to the technical field of engineering machinery, and provides a breaking hammer flow calibration device, which comprises a flow acquisition piece used for being connected in series with a driving pipeline of a breaking hammer and acquiring the maximum flow of the breaking hammer when the breaking hammer operates at a target gear and an electromagnetic control valve is opened under control current; the vehicle-mounted controller is used for obtaining calibration parameters under all the target gears according to all the maximum flows, all the control currents and a pre-stored flow and current relation algorithm, and current flow calibration results are obtained, and under the same target gear, all the current flow calibration results are obtained according to all the maximum flows, all the control currents and a pre-stored flow and current relation algorithm. The group number of the control current and the maximum flow is greater than the minimum group number required by the relation algorithm to obtain the calibration parameters. According to the flow calibration device for the breaking hammer, the convenience of flow calibration of the breaking hammer can be improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a flow calibration device for a hydraulic breaker. Background Technology

[0002] A hydraulic breaker is a device that uses power to perform crushing operations. It has become an important tool for excavators and plays a vital role in construction projects.

[0003] To provide the desired crushing function, the flow rate of the crusher needs to be controlled. Therefore, when developing equipment with hydraulic breaker piping, a flow rate adjustment program for the hydraulic breaker is typically preset based on the current-flow curve of the solenoid valve at a preset speed. However, with prolonged use, the equipment and its structure will experience wear and aging. At this time, a deviation will appear between the initially calibrated current-flow curve and the actual situation of the equipment, resulting in a decrease in the accuracy of the flow rate adjustment for the hydraulic breaker.

[0004] When deviations occur, engineers are asked to modify the current-flow curve at the initially calibrated target operating level. Engineers need to first test with testing equipment and then use a rewriting device to rewrite the original program to rewrite the parameters and thus achieve flow calibration. This not only requires different rewriting devices, but the process is also complex and inefficient.

[0005] Therefore, improving the ease of flow calibration for hydraulic breakers has become a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] This invention provides a flow calibration device for hydraulic breakers, which solves the problem of low recurrence efficiency in the flow calibration process of hydraulic breakers in the prior art, and improves the convenience of flow calibration for hydraulic breakers.

[0007] This utility model provides a flow calibration device for a hydraulic breaker, comprising:

[0008] A flow acquisition component is connected in series with the drive pipeline of the hydraulic breaker to acquire the maximum flow rate of the hydraulic breaker when the hydraulic breaker is running at the target gear and the electromagnetic control valve is opened under the control current.

[0009] The vehicle controller is used to obtain calibration parameters for each target gear according to each maximum flow rate, each control current, and a pre-stored flow-current relationship algorithm, and to obtain current-flow calibration results. Wherein, under the same target gear, the number of groups of control current and maximum flow rate is greater than the minimum number of groups required by the relationship algorithm to obtain the calibration parameters.

[0010] Optionally, it also includes:

[0011] The vehicle-mounted acquisition unit is electrically connected to the vehicle-mounted controller and is used to acquire the maximum flow rate and / or the control current, and send the acquired maximum flow rate and / or the control current to the vehicle-mounted controller.

[0012] Optionally, it also includes:

[0013] The vehicle-mounted display unit is electrically connected to the vehicle-mounted acquisition unit and is used to display the maximum flow rate and / or the control current.

[0014] Optionally, the control current includes a preset current, and the number of preset currents under the same target gear is greater than the minimum number of currents required by the relational algorithm to obtain the calibration parameters;

[0015] The flow acquisition component is used to acquire the maximum flow rate of the breaker when the electromagnetic control valve is opened under the preset current when the breaker is running at the target gear.

[0016] The vehicle acquisition unit is used to acquire the maximum traffic and send the maximum traffic to the vehicle controller;

[0017] The vehicle controller is used to obtain calibration parameters for each target gear according to the maximum flow rate, the preset current, and the pre-stored flow rate and current relationship algorithm, and to obtain the current flow rate calibration result.

[0018] Optionally, the maximum flow rate includes a maximum preset flow rate, and the number of maximum preset flow rates under the same target level is greater than the minimum number of maximum flow rates required by the relational algorithm to obtain the calibration parameters;

[0019] The flow acquisition device is used to acquire the maximum flow rate of the breaker when the electromagnetic control valve is opened under the control current when the breaker is running at the target gear.

[0020] The vehicle-mounted acquisition unit is used to acquire the corresponding control current when the maximum flow rate is equal to the maximum preset flow rate, and send the corresponding control current to the vehicle-mounted controller;

[0021] The vehicle controller is used to obtain calibration parameters for each target gear according to the maximum preset flow rate, the corresponding control current, and a pre-stored algorithm for the relationship between flow rate and current, and to obtain the current flow rate calibration result.

[0022] Optionally, the vehicle acquisition unit is further configured to acquire the adjustment control current and send the adjustment control current to the vehicle controller.

[0023] Optionally, the vehicle controller is further configured to obtain the rotational speed based on the target gear, and obtain the current displacement calibration result based on the preset relationship between displacement, flow rate and rotational speed, and the current flow rate calibration result.

[0024] Optionally, under the same target gear, the number of control current and the maximum flow rate can range from 4 to 8 groups.

[0025] Optionally, the flow acquisition device includes a flow meter.

[0026] Optionally, the vehicle display unit includes a vehicle display screen.

[0027] The hydraulic breaker flow calibration device provided by this utility model includes a flow acquisition component and an on-board controller. The flow acquisition component is connected in series with the drive pipeline of the hydraulic breaker to acquire the maximum flow rate of the hydraulic breaker when the hydraulic breaker is running at a target gear and the electromagnetic control valve is opened under the control current. The on-board controller is used to acquire the calibration parameters at each target gear according to each maximum flow rate, each control current, and a pre-stored flow-current relationship algorithm, and obtain the current flow calibration result. Thus, when calibrating the flow rate of the hydraulic breaker, the working gear of the hydraulic breaker is adjusted to the target gear, and the solenoid control valve is opened under the control current to put the hydraulic breaker into working condition. Since the flow acquisition device is connected in series with the drive pipeline of the hydraulic breaker, the actual maximum flow rate of the hydraulic breaker under the aforementioned working condition can be obtained through the flow acquisition device. After adjusting the control current multiple times under the same target gear, the corresponding control current and maximum flow rate under the same target gear can be obtained if the number of groups is greater than the minimum number of groups required by the relationship algorithm to obtain the calibration parameters. After adjusting each target gear, the required number of control currents and maximum flow rates under each gear can be obtained. Then, the vehicle controller performs calculations based on the maximum flow rate, each of the control currents, and the pre-stored flow-current relationship algorithm to obtain the calibration parameters of the relationship algorithm under the target gear, thus completing the calibration of the hydraulic breaker flow rate. As can be seen, the hydraulic breaker flow calibration device provided in this application embodiment only uses the flow acquisition component to obtain the maximum flow rate, which can obtain the true corresponding control current and maximum flow rate. Then, the calibration parameters can be directly obtained using the vehicle-mounted controller that already exists on the vehicle. This can improve the convenience of hydraulic breaker flow calibration. Furthermore, under the same target gear, the number of groups of control current and maximum flow rate is greater than the minimum number of groups required by the relational algorithm to obtain the calibration parameters. Not only can the calibration parameters be obtained, but adjustments can also be made based on each group of control current and maximum flow rate segments, thereby obtaining more accurate calibration parameters. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the hydraulic breaker flow calibration device provided in the embodiments of this application;

[0030] Figure 2 This is another structural schematic diagram of the hydraulic breaker flow calibration device provided in the embodiments of this application;

[0031] Figure 3 This is another structural schematic diagram of the hydraulic breaker flow calibration device provided in the embodiments of this application.

[0032] Figure label:

[0033] 1: Hydraulic breaker flow calibration device; 10: Flow acquisition component; 20: Vehicle controller; 30: Vehicle acquisition unit; 40: Vehicle display unit. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] To make it easier to understand, let's first explain the working process of a hydraulic breaker:

[0036] When a hydraulic breaker is needed for crushing operations, first set the required flow rate for the breaker, then start the machine and select the breaker's operating gear. The controller will obtain the operating current value of the solenoid valve based on the stored calibrated relationship between the flow rate and the current of the solenoid valve, and send it to the current supply structure of the solenoid valve to provide the operating current. This will cause the solenoid valve to open according to the opening degree required by the operating current, thereby providing the flow rate required by the hydraulic breaker.

[0037] Therefore, the flow rate calibration device for hydraulic breakers described in this article is a device for calibrating (adjusting) the relationship between flow rate and current stored in the controller, so that the relationship between flow rate and current is more consistent with the state of the working machinery, thereby ensuring that the controller can provide the required flow rate based on the calibrated relationship between flow rate and current (i.e., the calibration result) during the crushing operation.

[0038] The specific solutions of the embodiments of this application are described below with reference to the accompanying drawings.

[0039] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the hydraulic breaker flow calibration device provided in the embodiments of this application.

[0040] As shown in the figure, the hydraulic breaker flow calibration device 1 provided in this embodiment includes:

[0041] The flow acquisition component 10 is connected in series with the drive pipeline of the hydraulic breaker to acquire the maximum flow rate of the hydraulic breaker when the hydraulic breaker is running at the target gear and the electromagnetic control valve is opened under the control current.

[0042] The vehicle controller 20 is used to obtain calibration parameters for each target gear according to each of the maximum flow rates, each of the control currents, and a pre-stored flow-current relationship algorithm, and to obtain current-flow calibration results. Wherein, for the same target gear, the number of groups of control currents and maximum flow rates is greater than the minimum number of groups required by the relationship algorithm to obtain the calibration parameters.

[0043] As explained above, calibrating the flow rate of the hydraulic breaker refers to calibrating the relationship between the flow rate of the hydraulic breaker and the current of the solenoid control valve, and obtaining the calibration parameters of the algorithm for the relationship between the two. Therefore, the above process requires obtaining the actual flow rate and current of the hydraulic breaker when it is performing crushing operations. This requires obtaining the maximum flow rate of the hydraulic breaker and the control current of the solenoid control valve under different working conditions when the hydraulic breaker is in operation.

[0044] To obtain the maximum flow rate of the hydraulic breaker during operation, the hydraulic breaker flow rate calibration device 1 provided in this application includes a flow rate acquisition component 10. During flow rate calibration, this component is connected in series with the drive pipeline of the hydraulic breaker to obtain the true maximum flow rate during operation. It is readily understood that the flow rate acquisition component 10 described herein as being connected in series with the drive pipeline of the hydraulic breaker means that it is connected to the drive pipeline during flow rate calibration; otherwise, it may or may not be connected.

[0045] In the specific connection process, the drive pipeline of the hydraulic breaker can be disassembled first, and then the flow acquisition component 10 can be connected in series to the drive pipeline before connecting the corresponding equipment.

[0046] Specifically, the flow acquisition component 10 can be connected to the breaker gate valve, which is not only convenient to connect, but also accurate in measurement.

[0047] In one specific implementation, the flow acquisition component 10 can be a flow meter, which is not only low in cost but also has mature performance and accurate measurement results.

[0048] In addition to obtaining the true maximum flow rate using the flow acquisition device 10, it is also necessary to obtain the true control current. Since the control current is given based on the control signal of the controller, and the deviation of the control current provided based on the control signal is small, the control current of the hydraulic breaker flow calibration device 1 provided in this application embodiment is the control current corresponding to the control signal issued by the controller.

[0049] Of course, in other embodiments, a current measuring device can also be connected to the control current line of the electromagnetic control valve to measure the corresponding current value.

[0050] After obtaining the maximum flow rate and control current of the target quantity, the vehicle controller 20 inputs each maximum flow rate and each control current into the pre-stored flow rate and current relationship algorithm, calculates the values ​​of each parameter of the relationship algorithm, and then obtains the calibration parameters.

[0051] Specifically, the relational algorithm is related to the characteristics of the equipment that provides flow when the hydraulic breaker is in operation. For example, when the equipment is the main pump of an excavator, the current and flow rate have an approximately linear relationship at a certain speed within the working range, that is, flow rate = k * current + t. Therefore, the aforementioned relational algorithm is the aforementioned linear equation in two variables.

[0052] The vehicle-mounted controller 20 refers to the controller originally included in the working machinery to which the breaker belongs. This allows for direct acquisition of calibration results and direct adjustment of the calibration results without the need for additional equipment to acquire calibration parameters or for rewriting the calibration process to change the calibration results stored in the vehicle-mounted controller.

[0053] To improve calibration accuracy, under the same target setting, the number of sets of control current and maximum flow is greater than the minimum number of sets required by the relational algorithm to obtain the calibration parameters. This allows for the construction of calibration results in different steps, resulting in more accurate calibration results.

[0054] It is easy to understand that the number of control currents and the number of maximum flow rates mentioned in this article refers to the number of groups formed by each control current and its corresponding maximum flow rate when a control current and its corresponding maximum flow rate are grouped together.

[0055] If the number of sets of control current and maximum flow rate obtained is too large, the calibration time will be too long and the amount of calculation will be large. If the number of sets of control current and maximum flow rate obtained is too small, the accuracy of the calibration result will be low. Therefore, in a specific embodiment, under the same target gear, the number of sets of control current and maximum flow rate can be 4 to 8, for example, 6.

[0056] Thus, when calibrating the flow rate of the hydraulic breaker, the working gear of the hydraulic breaker is adjusted to the target gear, and the solenoid control valve is opened under the control current to put the hydraulic breaker into working condition. Since the flow acquisition component 10 is connected in series with the drive pipeline of the hydraulic breaker, the actual maximum flow rate of the hydraulic breaker under the aforementioned working condition can be obtained through the flow acquisition component 10. After adjusting the control current multiple times under the same target gear, the corresponding control current and maximum flow rate under the same target gear can be obtained if the number of groups is greater than the minimum number of groups required by the relationship algorithm to obtain the calibration parameters. After adjusting each target gear, the required number of control currents and maximum flow rates under each gear can be obtained. Then, the vehicle controller 20 performs calculations based on the maximum flow rate, each of the control currents, and the pre-stored flow-current relationship algorithm to obtain the calibration parameters of the relationship algorithm under the target gear, thus completing the calibration of the hydraulic breaker flow rate.

[0057] As can be seen, the hydraulic breaker flow calibration device 1 provided in this application embodiment only uses the flow acquisition component 10 to obtain the maximum flow rate, which can obtain the true corresponding control current and maximum flow rate. Then, the calibration parameters can be directly obtained using the vehicle-mounted controller 20 that is already on the vehicle. This can improve the convenience of hydraulic breaker flow calibration. Moreover, under the same target gear, the number of groups of control current and maximum flow rate is greater than the minimum number of groups required by the relational algorithm to obtain the calibration parameters. Not only can the calibration parameters be obtained, but adjustments can also be made based on each group of control current and maximum flow rate segments, thereby obtaining more accurate calibration parameters.

[0058] To expand the selectable range of the flow acquisition component 10, or to expand the range of control currents that the vehicle controller 20 can send, and to facilitate the vehicle controller 20 in acquiring the maximum flow or control current, in another specific embodiment, please refer to... Figure 2 , Figure 2 This is another structural schematic diagram of the hydraulic breaker flow calibration device provided in the embodiments of this application.

[0059] like Figure 2 As shown, the hydraulic breaker flow calibration device 1 provided in this embodiment of the application further includes:

[0060] The vehicle-mounted acquisition unit 30 is electrically connected to the vehicle-mounted controller 20 and is used to acquire the maximum flow rate and / or the control current, and send the acquired maximum flow rate and / or the control current to the vehicle-mounted controller 20.

[0061] When the flow acquisition unit 10 and the vehicle controller 20 cannot communicate, after the flow acquisition unit 10 acquires the maximum flow, it can acquire the maximum flow through the vehicle acquisition unit 30 and then send it to the vehicle controller 20; or when it is necessary to determine the control current as required, it can acquire the control current through the vehicle acquisition unit 30 and then send the control current to the vehicle controller 20 so that the vehicle controller 20 can control the opening of the solenoid control valve according to the received control current; of course, it is also possible to acquire both the control current and the maximum flow through the vehicle acquisition unit 30.

[0062] Specifically, in one embodiment, in order to simplify the calibration process, when the control current includes a preset current, the number of preset currents under the same target gear is greater than the minimum number of currents required by the relational algorithm to obtain the calibration parameters;

[0063] The flow acquisition component 10 is used to acquire the maximum flow rate of the breaker when the electromagnetic control valve is opened under the preset current when the breaker is running at the target gear.

[0064] The vehicle acquisition unit 30 is used to acquire the maximum traffic and send the maximum traffic to the vehicle controller;

[0065] The vehicle controller 20 is used to obtain calibration parameters for each target gear according to the maximum flow rate, the preset current, and the pre-stored flow rate and current relationship algorithm, and to obtain the current flow rate calibration result.

[0066] As can be seen, in order to achieve flow calibration of the hydraulic breaker, a control current, namely the aforementioned preset current, is predetermined and stored in the storage device corresponding to the vehicle controller 20. When performing flow calibration of the hydraulic breaker, after selecting the target gear, the vehicle controller 20 sequentially opens the solenoid control valve with the preset current. The flow acquisition unit 10 acquires the corresponding maximum flow. After obtaining the maximum flow, the vehicle acquisition unit 30 acquires each maximum flow and sends it to the vehicle controller 20 for subsequent processing.

[0067] For example, six preset currents can be set for the same target gear. During the specific calibration process, the target gear is selected, and the vehicle controller 20 controls the solenoid valve to open under the first preset current. The flow acquisition unit 10 acquires the first maximum flow corresponding to the first preset current, and then the vehicle acquisition unit 30 acquires the first maximum flow. Then, the vehicle controller 20 controls the solenoid valve to open under the second preset current, and the flow acquisition unit 10 acquires the second maximum flow corresponding to the second preset current, and then the vehicle acquisition unit 30 acquires the second maximum flow, and so on, until the sixth maximum flow is obtained. Then, the vehicle acquisition unit 30 sends all six maximum flows to the vehicle controller 20. Then, the vehicle controller 20 acquires the calibration parameters of the pre-stored flow-current relationship algorithm based on the corresponding maximum flow and preset current, and obtains the calibrated flow-current relationship algorithm of the target gear.

[0068] Of course, in another specific implementation, the flow rate of the hydraulic breaker can also be calibrated by adjusting the control current to achieve the maximum flow rate of the hydraulic breaker reaching the maximum preset flow rate. Specifically, in this embodiment, the maximum flow rate includes the maximum preset flow rate, and the number of the maximum preset flow rates under the same target gear is greater than the minimum number of maximum flow rates required by the relational algorithm to obtain the calibration parameters.

[0069] The flow acquisition component 10 is used to acquire the maximum flow rate of the breaker when the electromagnetic control valve is opened under the control current when the breaker is running at the target gear.

[0070] The vehicle-mounted acquisition unit 30 is used to acquire the corresponding control current when the maximum flow rate is equal to the maximum preset flow rate, and send the corresponding control current to the vehicle-mounted controller 20;

[0071] The vehicle controller 20 is used to obtain calibration parameters for each target gear according to the maximum preset flow rate, the corresponding control current, and a pre-stored algorithm for the relationship between flow rate and current, and to obtain the current flow rate calibration result.

[0072] In the specific calibration process, firstly, a maximum preset flow rate at the target gear is obtained. Then, the vehicle controller 20 obtains the control current based on the existing current-flow relationship and controls the opening of the solenoid control valve. During this process, the flow acquisition unit 10 obtains the maximum flow rate of the breaker. Due to the deviation in the existing current-flow relationship, the maximum flow rate obtained by the flow acquisition unit 10 is not equal to the maximum preset flow rate. Then, the control current of the solenoid control valve is adjusted until the maximum flow rate obtained by the flow acquisition unit 10 equals the maximum preset flow rate, and the corresponding control current is obtained. The vehicle acquisition unit 30 obtains the corresponding control current when the maximum flow rate equals the maximum preset flow rate and sends the corresponding control current to the vehicle controller 20. Then, the vehicle controller 20 obtains the calibration parameters at each target gear based on the corresponding maximum preset flow rate and the corresponding control current, as well as the pre-stored flow-current relationship algorithm, and obtains the current-flow calibration result.

[0073] Of course, in order to further improve the convenience of the equipment, the adjustment control current can also be obtained through the vehicle acquisition unit 30 and sent to the vehicle controller 20, so that the vehicle controller 20 can adjust the opening of the electromagnetic control valve. Of course, when the maximum flow rate obtained by the flow acquisition unit 10 is equal to the maximum preset flow rate, the vehicle acquisition unit 30 will obtain the control current when the maximum flow rate is equal to the maximum preset flow rate.

[0074] It is readily understood that in other embodiments, the control current can also be adjusted in other ways so that the maximum flow rate acquired by the flow acquisition element 10 is equal to the maximum preset flow rate.

[0075] To make it easier to understand, let's take the example of setting 8 maximum preset flow rates under the same target level, and explain as follows:

[0076] In the specific calibration process, the target gear is first selected, and a first maximum preset flow rate is set, so that the vehicle controller 20 controls the solenoid control valve to open under the first control current. The flow acquisition unit 10 acquires the first maximum flow rate corresponding to the first control current. Based on the relationship between the first maximum flow rate and the first maximum preset flow rate, the control current is adjusted until the first maximum flow rate equals the first maximum preset flow rate, thus obtaining the first corresponding control current. Then, the maximum preset flow rate is changed to the second maximum preset flow rate, and the above process is continued to obtain the second corresponding control current, ..., until the eighth corresponding control current is obtained. Then, the vehicle acquisition unit 30 sends all eight corresponding control currents to the vehicle controller 20. Then, the vehicle controller 20 acquires the calibration parameters of the pre-stored flow-current relationship algorithm based on the corresponding maximum preset flow rate and the corresponding control current, thus obtaining the calibrated flow-current relationship algorithm of the target gear.

[0077] Of course, in another embodiment, the hydraulic breaker flow calibration device 1 provided in this application can simultaneously have the function of calibrating based on the maximum flow rate obtained from the preset current, and the function of calibrating based on the corresponding control current obtained from the maximum preset flow rate.

[0078] It is readily understood that, in other embodiments, the hydraulic breaker flow calibration device 1 provided in this application may also be calibrated by acquiring any control current and the corresponding maximum current based on the flow acquisition device 10, without setting a preset current or a maximum preset flow rate.

[0079] Furthermore, to ensure that the operator clearly understands the specific values ​​of the maximum flow rate or control current, and to guarantee the accuracy of the maximum flow rate or control current acquired by the on-board acquisition unit 30, and to promptly detect erroneous inputs, please refer to [reference needed]. Figure 3 , Figure 3 This is another structural schematic diagram of the hydraulic breaker flow calibration device provided in the embodiments of this application.

[0080] like Figure 3 As shown, the hydraulic breaker flow calibration device 1 provided in this application embodiment may further include:

[0081] The vehicle-mounted display unit 40 is electrically connected to the vehicle-mounted acquisition unit 30 and is used to display the maximum flow rate and / or the control current.

[0082] In this way, the operator can promptly determine the maximum flow rate and / or control current acquired by the vehicle acquisition unit 30 through the vehicle display unit 40, grasp the relevant data, and also determine whether the calibration at the same gear level has been completed, etc.

[0083] Of course, to reduce costs, the in-vehicle display unit may include an in-vehicle display screen.

[0084] Furthermore, in order to reduce the storage space occupied and facilitate the quick determination of the base current during crushing operations, and then fine-tune the current based on the base current and the target gear, in one specific embodiment, the on-board controller 20 is also used to obtain the rotational speed according to the target gear, and obtain the current displacement calibration result according to the preset relationship between displacement, flow rate and rotational speed, and the current flow calibration result.

[0085] It's easy to understand that the relationship between displacement, theoretical flow rate, and engine speed is as follows:

[0086] Theoretical flow rate = displacement * speed.

[0087] The theoretical flow rate mentioned in this article refers to the flow rate when the pump providing the flow rate has zero leakage flow rate at the outlet pressure of 0 or the pressure difference between the inlet and outlet of 0.

[0088] However, due to the influence of processing accuracy and control accuracy, the actual flow rate provided by the pump is usually not zero. Therefore, when using the above relationship to obtain the current displacement calibration result, the flow rate obtained by the flow acquisition component 10 is first taken as the theoretical flow rate. Based on the target gear, the corresponding speed can be obtained. Then, using the above relationship, the flow rate is converted into the displacement, thus realizing the transformation of the relationship between flow rate and current into the relationship between displacement and current.

[0089] However, in order to improve accuracy, in actual use, the relationship between flow rate, displacement and rotation speed obtained by the flow acquisition device 10 can be corrected by a certain correction algorithm to obtain the corrected relationship between displacement and current.

[0090] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A breaking hammer flow calibration device, characterized by, include: A flow acquisition component, connected in series with the drive pipeline of the hydraulic breaker, is used to acquire the maximum flow rate of the hydraulic breaker when the hydraulic breaker is running at the target gear and the electromagnetic control valve is opened under the control current. The vehicle controller is signal-connected to the flow acquisition device and is used to acquire calibration parameters for each target gear to obtain current flow calibration results.

2. The breaking hammer flow calibration device of claim 1, wherein, Also includes: The vehicle-mounted acquisition unit is electrically connected to the vehicle-mounted controller and is used to acquire the maximum flow rate and / or the control current, and send the acquired maximum flow rate and / or the control current to the vehicle-mounted controller.

3. The breaking hammer flow calibration device of claim 2, wherein, Also includes: The vehicle-mounted display unit is electrically connected to the vehicle-mounted acquisition unit and is used to display the maximum flow rate and / or the control current.

4. The breaking hammer flow calibration device of claim 2, wherein, The control current includes a preset current, and the flow acquisition device is used to acquire the maximum flow of the breaker when the breaker is running at the target gear and the electromagnetic control valve is opened under the preset current.

5. The breaking hammer flow calibration device of claim 2, wherein, The maximum flow rate includes the maximum preset flow rate; The vehicle-mounted acquisition unit is used to acquire the corresponding control current when the maximum flow rate is equal to the maximum preset flow rate, and send the corresponding control current to the vehicle-mounted controller.

6. The breaking hammer flow calibration device of claim 5, wherein, Under the same target gear, the number of control current and the maximum flow rate ranges from 4 to 8 groups.

7. The breaking hammer flow calibration device of claim 1, wherein, The flow acquisition device includes a flow meter.

8. The breaking hammer flow calibration device of claim 3, wherein, The vehicle-mounted display unit includes a vehicle-mounted display screen.

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