The application discloses a power regulating system of an electric control hydraulic pump of a dynamic compactor and the dynamic compactor

Abstract

The application discloses a power regulation system of a hydraulic pump of a dynamic compactor and the dynamic compactor, and the regulation system comprises the hydraulic pump, a pilot control unit in communication with the hydraulic pump through a pilot oil circuit, the pilot control unit being used for controlling the control oil pressure in the pilot oil circuit so as to regulate the output power of the hydraulic pump, and an electric proportional valve arranged in the pilot oil circuit and located between the hydraulic pump and the control unit and used for limiting the control oil pressure in the pilot oil circuit. The application aims to provide the power regulation system of the hydraulic pump of the dynamic compactor and the dynamic compactor, so as to solve the problem of large energy consumption caused by the mismatch between the working power of the dynamic compactor and the power of the hydraulic pump in the prior art.

Description

Technical Field

[0001] This application relates to the field of hydraulic technology, and in particular to an electronically controlled power adjustment system for a hydraulic pump of a dynamic compaction machine and a dynamic compaction machine. Background Technology

[0002] Dynamic compaction machines are widely used in construction fields with high requirements for foundation bearing capacity, such as airports, railways, and high-rise buildings. Unlike cranes, they have a large working range and high winch operating frequency, resulting in very high fuel consumption. To save fuel, dynamic compaction machines are generally equipped with variable power hydraulic pumps. The output power of the hydraulic pump is adjusted by changing the input pressure at the power regulating port.

[0003] In existing technologies, although the output power of the hydraulic pump can be controlled, energy waste can occur when the working load of the dynamic compaction machine is mismatched with the output power of the hydraulic pump. For example, when the hydraulic pump operates continuously at its maximum output power, while the actual load of the dynamic compaction machine is relatively small, the excess output power cannot be utilized, resulting in energy waste. Utility Model Content

[0004] The purpose of this application is to provide an electronically controlled power adjustment system for the hydraulic pump of a dynamic compaction machine and a dynamic compaction machine, so as to solve the problem of high energy consumption caused by the mismatch between the working power of the dynamic compaction machine and the power of the hydraulic pump in the prior art.

[0005] To achieve the above objectives, this application employs the following technical solution:

[0006] In a first aspect, this application provides an electronically controlled power adjustment system for a hydraulic pump of a dynamic compaction machine, comprising: a hydraulic pump; a pilot control unit, which is connected to the hydraulic pump through a pilot oil circuit, the pilot control unit being used to control the control oil pressure in the pilot oil circuit, thereby adjusting the output power of the hydraulic pump; and an electro-proportional valve, which is located in the pilot oil circuit and between the hydraulic pump and the control unit, for limiting the control oil pressure in the pilot oil circuit.

[0007] Compared with existing technologies, the technical effects achieved by this solution are as follows: This application's solution limits the control oil pressure by installing an electro-proportional valve in the pilot oil circuit, ensuring that the hydraulic pump's output power always matches the working load of the dynamic compaction machine. This avoids energy waste caused by excessive hydraulic pump output power when the load on the dynamic compaction machine is low. Specifically, the pilot control unit controls the hydraulic pump's output power by controlling the control oil pressure in the pilot oil circuit. However, this setup can lead to a mismatch between the load on the dynamic compaction machine and the hydraulic pump's output power. For example, when the pilot control unit maximizes the hydraulic pump's output power, if the dynamic compaction machine is under low load conditions such as no-load operation, the hydraulic pump does not need to maintain maximum output power, resulting in energy waste. To address the aforementioned issues, the technical solution of this application includes an electro-proportional valve installed between the hydraulic pump and the pilot control unit. When the load on the dynamic compaction machine is not high, but the control oil pressure output by the pilot control unit to the hydraulic pump is too high, the output power of the hydraulic pump will be excessive. By controlling the electro-proportional valve to reduce the control oil pressure in the pilot oil circuit, the excessive output power of the hydraulic pump can be effectively prevented, thereby avoiding energy waste.

[0008] Furthermore, the electro-proportional valve has an unloaded mode and a normal mode; when the electro-proportional valve is in the unloaded mode, the valve opening is reduced to lower the control oil pressure of the input hydraulic pump; when the electro-proportional valve is in the normal mode, the valve opening is increased to make the control oil pressure of the input hydraulic pump the same as the control oil pressure controlled by the pilot control unit.

[0009] Compared with existing technologies, the technical effects achieved by this solution are as follows: By switching between no-load and normal modes using an electro-proportional valve, the output power of the hydraulic pump is matched with the load of the dynamic compaction machine, reducing energy loss under no-load or light-load conditions. Specifically, when the dynamic compaction machine is under no-load or low-load conditions, the electro-proportional valve is switched to no-load mode. At this time, the valve opening of the electro-proportional valve decreases, and the control oil pressure in the pilot oil circuit decreases, thereby suppressing the output power of the hydraulic pump and avoiding excessive output power due to excessively high control oil pressure output by the pilot control unit. When the dynamic compaction machine enters a high-load condition, the electro-proportional valve switches to normal mode, and the valve opening returns to its maximum, so that the control oil pressure is completely controlled by the pilot control unit, ensuring that the output power of the hydraulic pump is synchronized with the actual load demand and guaranteeing operational efficiency.

[0010] Furthermore, it also includes: a control device, which is electrically connected to the electro-proportional valve and is used to control the valve opening degree of the electro-proportional valve.

[0011] Furthermore, the pilot control unit includes a foot valve and / or a pilot handle.

[0012] Furthermore, when the pilot control unit includes a foot valve and a pilot handle, the foot valve and the pilot handle are connected in parallel and then connected in series with the hydraulic pump through the pilot oil circuit.

[0013] Furthermore, it also includes a three-way shuttle valve; wherein, when the pilot control unit includes a foot valve and a pilot handle, the output port A of the foot valve is connected to the first inlet of the three-way shuttle valve, the output port B of the pilot handle is connected to the second inlet of the three-way shuttle valve, the first outlet of the three-way shuttle valve is connected to the input port C of the electro-proportional valve, and the output port of the electro-proportional valve is connected to the power adjustment port of the hydraulic pump.

[0014] Furthermore, the hydraulic pump is a dual pump.

[0015] Secondly, this application also provides a dynamic compaction machine, which includes the hydraulic pump electronic power adjustment system of any of the foregoing claims.

[0016] Compared with the prior art, the beneficial effects achieved by this application are as follows:

[0017] 1. The technical solution of this application limits the control oil pressure of the pilot oil circuit by using an electro-proportional valve to ensure that the output power of the hydraulic pump is always matched with the working load of the dynamic compaction machine, thereby avoiding energy waste caused by excessive output power of the hydraulic pump when the load of the dynamic compaction machine is not large.

[0018] 2. By switching between no-load mode and normal mode through an electro-proportional valve, the output power of the hydraulic pump can be matched with the load of the dynamic compaction machine, thereby reducing the energy loss of the dynamic compaction machine under no-load or light-load conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of some embodiments of an electrically controlled power adjustment system for a hydraulic pump of a dynamic compaction machine provided in this application.

[0021] Figure 2 This is a schematic diagram of the structure of a hydraulic pump according to some embodiments provided in this application.

[0022] Figure 3 This is a schematic diagram of the structure of a three-way shuttle valve according to some embodiments provided in this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Hydraulic pump; 110. Power regulating port; 120. Oil outlet; 200. Electro-proportional valve; 310. Foot valve; 320. Pilot handle; 330. Pilot oil circuit; 340. Three-way shuttle valve; 341. First inlet; 342. Second inlet; 343. First outlet. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0026] Example 1:

[0027] This embodiment provides an electronically controlled power adjustment system for the hydraulic pump of a dynamic compaction machine, such as... Figure 1 As shown, the hydraulic pump power regulation system of the dynamic compaction machine includes a hydraulic pump 100, a pilot control unit, and an electro-proportional valve 200.

[0028] Specifically, such as Figure 2 As shown, the hydraulic pump 100 provided in this embodiment is a variable power hydraulic pump 100. The housing of the hydraulic pump 100 is provided with a power adjustment port 110. The hydraulic pump 100 can control the output power of the hydraulic pump 100 by changing the input pressure at the power adjustment port 110.

[0029] Specifically, the pilot control unit is used to control the output power of the hydraulic pump 100.

[0030] Specifically, the pilot control unit is connected to one end of the pilot oil circuit 330, and the other end of the pilot oil circuit 330 is connected to the power regulating port 110 of the hydraulic pump 100. Low-pressure control oil flows in the pilot oil circuit 330. The pilot control unit controls the control oil pressure in the pilot oil circuit 330. After receiving the control oil pressure, the power regulating port 110 of the hydraulic pump 100 changes the output power. When the pressure in the pilot oil circuit 330 increases, the output power of the hydraulic pump 100 increases; when the pressure in the pilot oil circuit 330 decreases, the output power of the hydraulic pump 100 decreases.

[0031] Specifically, an electro-proportional valve 200 is installed in the pilot oil circuit 330. The input port C of the electro-proportional valve 200 is connected to the pilot control unit, and the output port of the electro-proportional valve 200 is connected to the power adjustment port 110 of the hydraulic pump 100. The electro-proportional valve 200 converts the input current signal into mechanical force through a proportional electromagnet, driving the valve core of the electro-proportional valve 200 to move, thereby adjusting the valve opening of the electro-proportional valve 200 and thus adjusting the control oil pressure in the pilot oil circuit 330.

[0032] Furthermore, the electro-proportional valve 200 has an unloaded mode and a normal mode.

[0033] Specifically, when the electro-proportional valve 200 is in no-load mode, a corresponding electrical signal is input to the electro-proportional valve 200, the electromagnetic force of the proportional electromagnet decreases, the valve core displacement is restricted, resulting in a smaller valve opening, thereby reducing the control oil pressure input to the hydraulic pump 100; when the electro-proportional valve 200 is in normal mode, a corresponding electrical signal is input to the electro-proportional valve 200, the valve opening of the electro-proportional valve 200 returns to its maximum, so that the control oil pressure is completely controlled by the pilot control unit, ensuring that the output power of the hydraulic pump 100 matches the actual load requirements.

[0034] It should be noted that the no-load mode of the electro-proportional valve 200 refers to the output power requirement of the dynamic compaction machine under no-load and low-load conditions. The output power of the dynamic compaction machine under no-load and low-load conditions is obtained through testing, and based on the correspondence between different loads and output power, the required output power of the dynamic compaction machine in no-load mode is thus determined. These no-load and low-load conditions include, but are not limited to: the hoisting system idling, the traveling mechanism moving without resistance, and the hydraulic system in its idle stroke phase.

[0035] Furthermore, the application also includes a control device electrically connected to the electro-proportional valve 200 for controlling the valve opening degree of the electro-proportional valve 200.

[0036] Specifically, the control device is located in the control panel of the driver's cab of the dynamic compaction machine, and the user can adjust the output power of the hydraulic pump 100 according to the actual working conditions.

[0037] Furthermore, the pilot control unit includes a foot pedal valve 310 and / or a pilot handle 320.

[0038] Specifically, the foot pedal valve 310 is used to control the movement of the dynamic compaction machine. When the user presses the foot pedal valve 310, the valve core is displaced according to the degree of pressing, changing the opening of the pilot oil circuit 330. The pilot handle 320 is used to control the hoisting and lowering movements. The greater the tilt angle of the pilot handle 320 pushed by the user, the greater the displacement of the valve core, the greater the flow area of ​​the pilot oil circuit 330, and the higher the control oil pressure.

[0039] In some embodiments, the foot valve 310 and the pilot handle 320 are provided simultaneously. In this case, the foot valve 310 and the pilot handle 320 are connected in parallel and then connected in series with the hydraulic pump 100 through the pilot oil circuit 330.

[0040] Furthermore, such as Figure 1 and Figure 3As shown, the output port A of the foot pedal valve 310 is connected to the first inlet 341 of the three-way shuttle valve 340, the output port B of the pilot handle 320 is connected to the second inlet 342 of the three-way shuttle valve 340, the first outlet 343 of the three-way shuttle valve 340 is connected to the input port C of the electro-proportional valve 200, and the output port of the electro-proportional valve 200 is connected to the power adjustment port 110 of the hydraulic pump 100.

[0041] Specifically, the three-way shuttle valve 340 has a first inlet 341, a second inlet 342, and a first outlet 343. When control oil enters from the first inlet 341 and the second inlet 342, the side with higher control oil pressure can flow out from the first outlet 343. The function of the three-way shuttle valve 340 is to select the higher pressure signal from the first inlet 341 and the second inlet 342 and transmit it to the first outlet 343. This ensures that whether the pilot handle 320 is operated or the foot valve 310 is operated, as long as the pressure generated by either operation is higher than the other, the higher pressure signal can be transmitted to the electro-proportional valve 200 through the three-way shuttle valve 340, thereby adjusting the pressure of the power regulating port 110 and controlling the output power of the hydraulic pump 100.

[0042] Specifically, the foot valve 310 and the pilot handle 320 are connected to the pilot oil pump and the pilot oil tank (not shown in the figure), respectively. The pilot oil tank stores hydraulic oil as control oil. The pilot oil pump is connected to the oil inlet of the foot valve 310 and the pilot handle 320, respectively. When the foot valve 310 is stepped on or the pilot handle 320 is operated, the control oil output by the pilot oil pump changes the oil pressure of the control oil through the throttle port of the foot valve 310 or the pilot handle 320.

[0043] In some embodiments, the hydraulic pump 100 is a tandem pump. The hydraulic pump 100 has two outlet ports 120, namely outlet port A and outlet port B, and two identical power regulating ports 110, namely power regulating port A and power regulating port B. Power regulating port A controls the output power of outlet port A, and power regulating port B controls the output power of outlet port B. The electro-proportional valve 200 includes identical electro-proportional valves A and B, and the three-way shuttle valve 340 includes identical three-way shuttle valves A and B. The foot pedal valve 310 is connected to the first inlet 341 of both three-way shuttle valves A and B. The pilot handle 320 is connected to the second inlet 342 of both three-way shuttle valves A and B. The first outlet 343 of three-way shuttle valve A is connected to electro-proportional valve A, and electro-proportional valve A is connected to power regulating port A. The first outlet 343 of three-way shuttle valve B is connected to electro-proportional valve B, and electro-proportional valve B is connected to power regulating port B.

[0044] Specifically, the pilot handle has four operating strokes: first stroke, second stroke, third stroke, and fourth stroke. The first and second strokes are in opposite directions and control the output power of hydraulic pump outlet A. The third and fourth strokes are in opposite directions and control the output power of hydraulic pump outlet B. When the pilot handle is in the first or second stroke, the control oil passes through the three-way shuttle valve A, the electro-proportional valve A, and finally to the power regulating port A, thereby controlling the output power of hydraulic pump outlet A. When the pilot handle is in the third or fourth stroke, the control oil passes through the three-way shuttle valve B, the electro-proportional valve B, and finally to the power regulating port B, thereby controlling the output power of hydraulic pump outlet B. The pilot handle can control strokes in different directions simultaneously. For example, if pushed to the first and third strokes simultaneously, the control oil is input to the three-way shuttle valves A and B respectively, achieving simultaneous output from the dual pumps.

[0045] Specifically, the foot pedal valve includes foot pedal A and foot pedal B. When foot pedal A is pressed, control oil passes through three-way shuttle valve A and electro-proportional valve A in sequence, and finally reaches power regulating port A, thereby controlling the output power of hydraulic pump outlet A. When foot pedal B is pressed, control oil passes through three-way shuttle valve B and electro-proportional valve B in sequence, and finally reaches power regulating port B, thereby controlling the output power of hydraulic pump outlet B. The user can press foot pedal A and foot pedal B simultaneously. At this time, control oil is input into three-way shuttle valve A and three-way shuttle valve B respectively, thereby simultaneously controlling the output power of outlet A and outlet B.

[0046] Example 2:

[0047] This embodiment provides a dynamic compaction machine, which includes the above-mentioned dynamic compaction machine hydraulic pump electric control power adjustment system.

[0048] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0049] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A hydraulic pump electrical control power adjustment system for a dynamic compaction machine, characterized in that, include: Hydraulic pump (100); A pilot control unit is connected to the hydraulic pump (100) via a pilot oil circuit (330). The pilot control unit is used to control the control oil pressure in the pilot oil circuit (330), thereby adjusting the output power of the hydraulic pump (100). An electro-proportional valve (200), which is located in the pilot oil circuit (330) and between the hydraulic pump (100) and the control unit, is used to limit the control oil pressure in the pilot oil circuit (330).

2. The hydraulic pump electrical control power adjustment system for a dynamic compaction machine according to claim 1, characterized in that, The electro-proportional valve (200) has an unloaded mode and a normal mode; When the electro-proportional valve (200) is in no-load mode, the valve opening of the electro-proportional valve (200) is reduced to reduce the control oil pressure input to the hydraulic pump (100); When the electro-proportional valve (200) is in normal mode, the valve opening of the electro-proportional valve (200) is increased so that the control oil pressure input to the hydraulic pump (100) is the same as the control oil pressure controlled by the pilot control unit.

3. The hydraulic pump electrical control power adjustment system for a dynamic compaction machine according to claim 2, characterized in that, Also includes: A control device, which is electrically connected to the electro-proportional valve (200), is used to control the valve opening degree of the electro-proportional valve (200).

4. The hydraulic pump electrical control power adjustment system for a dynamic compaction machine according to claim 1, characterized in that, The pilot control unit includes a foot valve (310) and / or a pilot handle (320).

5. The hydraulic pump electrical control power adjustment system for a dynamic compaction machine according to claim 4, characterized in that, When the pilot control unit includes the foot valve (310) and the pilot handle (320), the foot valve (310) and the pilot handle (320) are connected in parallel and then connected in series with the hydraulic pump (100) through the pilot oil circuit (330).

6. The hydraulic pump electrical control power adjustment system for a dynamic compaction machine according to claim 5, characterized in that, It also includes a three-way shuttle valve (340); When the pilot control unit includes the foot valve (310) and the pilot handle (320), the output port A of the foot valve (310) is connected to the first inlet (341) of the three-way shuttle valve (340), the output port B of the pilot handle (320) is connected to the second inlet (342) of the three-way shuttle valve (340), the first outlet (343) of the three-way shuttle valve (340) is connected to the input port C of the electro-proportional valve (200), and the output port of the electro-proportional valve (200) is connected to the power adjustment port of the hydraulic pump (100).

7. The hydraulic pump electrical control power adjustment system for a dynamic compaction machine according to claim 1, characterized in that, The hydraulic pump (100) is a dual pump.

8. A dynamic compaction machine, characterized in that, The dynamic compaction machine includes the hydraulic pump electric control power adjustment system for the dynamic compaction machine as described in any one of claims 1 to 7.

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