Variable-flow radial plunger pump device

Abstract

The invention relates to the technical field of hydraulic transmission and control, in particular to a variable-flow radial plunger pump device which comprises a base used for integrating and supporting structural components of the device. The hydraulic driving mechanism is mounted on the base and used for providing hydraulic energy; the hydraulic motor is indirectly driven by the hydraulic driving mechanism and is used for converting hydraulic energy into mechanical energy; the radial pump is connected with the hydraulic motor, and displacement control is achieved by changing the rotating speed of a crankshaft of the radial pump; the hydraulic valve assembly is arranged on the hydraulic pipeline between the hydraulic driving mechanism and the hydraulic motor and used for adjusting the flow of oil entering the hydraulic motor. According to the scheme, the defects that in the prior art, flow adjustment of a coal mine underground plunger pump is not accurate, and response is slow are overcome, the output rotating speed of the hydraulic motor is changed by changing the flow of liquid entering the hydraulic motor, and large-range real-time accurate flow control is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic transmission and control, and in particular to a variable flow radial piston pump device. Background Art

[0002] The plunger pump is a key device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve the suction and discharge of liquid. It has the advantages of high rated pressure, compact structure, efficient operation and convenient flow regulation. However, in underground coal mine applications, the existing mining plunger pump has limitations in controlling the flow by adjusting the speed of the drive motor. Due to the limitations of motor torque and inverter response time, these plunger pumps are difficult to achieve accurate flow regulation in a large range, especially at low speeds, insufficient motor torque leads to difficulty in speed regulation.

[0003] The emulsion pumps and spray pumps used in traditional fully mechanized mining working faces are quantitative pumps. Although frequency converters are introduced for speed regulation to adapt to different flow requirements, the response time of frequency conversion speed regulation is long and cannot meet the requirements for large-scale real-time and precise flow regulation. In addition, high-power explosion-proof servo motors suitable for such environments have not yet been widely commercialized, making variable flow control of reciprocating plunger pumps in coal mines a difficult problem in the industry. Faced with harsh environments with high dust, high humidity and even flooding risks, the safety and reliability of equipment are particularly important. Summary of the invention

[0004] The invention provides a variable flow radial piston pump device, which is used to solve the defects of inaccurate flow regulation and slow response of plunger pumps in coal mines in the prior art, and realize large-scale real-time and accurate flow control.

[0005] The present invention provides a variable flow radial piston pump device, comprising: a base, used to integrate and support the structural components of the device; a hydraulic drive mechanism, installed on the base, used to provide hydraulic energy; a hydraulic motor, indirectly driven by the hydraulic drive mechanism, used to convert the hydraulic energy into mechanical energy; a radial pump, connected to the hydraulic motor, and realizing displacement control by changing the crankshaft speed of the radial pump; a hydraulic valve assembly, arranged on the hydraulic pipeline between the hydraulic drive mechanism and the hydraulic motor, and used to adjust the oil flow entering the hydraulic motor.

[0006] According to one embodiment of the present invention, the hydraulic drive mechanism includes an explosion-proof motor and a series pump group; wherein the explosion-proof motor is used to drive the series pump group to pressurize the oil; a bell cover assembly is arranged between the explosion-proof motor and the series pump group to protect the internal transmission structure thereof.

[0007] According to one embodiment of the present invention, the hydraulic drive mechanism also includes a liquid inlet assembly; the liquid inlet assembly is connected to the series pump group and is used to extract oil from the oil tank; the hydraulic valve assembly includes an electrically controlled reversing valve connected to the liquid outlet of the series pump group.

[0008] According to one embodiment of the present invention, a filter is provided in series with the oil outlet of the hydraulic motor for filtering the oil on the oil return path of the hydraulic motor; and / or a cooler is provided in series with the oil outlet of the hydraulic motor for cooling the oil on the oil return path of the hydraulic motor.

[0009] According to one embodiment of the present invention, a saddle assembly is further included. The saddle assembly is arranged on a base, used to carry the hydraulic motor and the radial pump, and plays a protective role between the hydraulic motor and the radial pump.

[0010] According to one embodiment of the present invention, the base is rectangular, and the hydraulic drive mechanism and the saddle seat assembly are respectively arranged at different positions in the length direction of the base; wherein the hydraulic motor is arranged on the side of the saddle seat assembly facing the hydraulic drive mechanism, and the first hydraulic pipeline system for driving the hydraulic motor is concentrated in the area between the hydraulic drive mechanism and the saddle seat assembly; the radial pump is arranged on the side of the saddle seat assembly facing away from the hydraulic drive mechanism, and the second hydraulic pipeline system driven by the radial pump is arranged in the area on the side of the saddle seat assembly facing away from the first hydraulic pipeline system.

[0011] According to one embodiment of the present invention, the base is provided with a plurality of standardized assembly stations along its length direction, and the various structural components of the device are detachably mounted on the assembly stations.

[0012] According to one embodiment of the present invention, a pump station controller is further included, which is arranged on the base and is used to control the hydraulic drive mechanism and the hydraulic valve assembly.

[0013] According to one embodiment of the present invention, a monitoring module connected to the pump station controller is included to monitor the abnormal operating state of the device, and the monitoring module includes any of the following. The present invention also provides one or more sensors: a temperature sensor, arranged on the hydraulic motor and / or the radial pump, for monitoring the working temperature; a pressure sensor, arranged on any hydraulic pipeline, for monitoring the oil pressure; a flow sensor, installed at the oil outlet of the hydraulic motor, for measuring the oil flow; a vibration sensor, installed on the hydraulic drive mechanism and / or the radial pump, for detecting abnormal vibration.

[0014] According to one embodiment of the present invention, the pump station controller is integrated with a protection circuit for automatically cutting off the power supply and stopping the operation of the hydraulic drive mechanism when the monitoring module detects the abnormal operating state; and / or a safety valve is provided on the hydraulic pipeline of the device for relieving pressure when the oil pressure exceeds a limit value.

[0015] The variable flow radial piston pump device provided by the present invention overcomes the torque and response time limitations brought by the traditional direct motor drive method by adopting a combination of a hydraulic drive mechanism and a hydraulic motor. Specifically, the device uses hydraulic energy to indirectly drive the hydraulic motor, thereby driving the radial pump to work, which not only bypasses the problem of insufficient torque at low speed when directly driven by a motor, but also, due to the characteristics of the hydraulic system, can provide stable power output in a wide range, ensuring that the displacement can be accurately controlled under different working conditions. In addition, the hydraulic valve assembly arranged between the hydraulic drive mechanism and the hydraulic motor can quickly adjust the oil flow entering the hydraulic motor, and by changing the way the liquid flow enters the hydraulic motor, the crankshaft speed is instantly changed, the output speed of the hydraulic motor is changed, and the real-time regulation of the pump displacement is realized. Even in the working environment of the coal mine, the high-efficiency flow control accuracy can be maintained, which solves the problems of inaccurate flow regulation and slow response in the prior art, and realizes real-time and accurate flow control in a wide range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of a variable flow radial piston pump device provided by the present invention from a top view.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the variable flow radial piston pump device provided by the present invention.

[0019] Reference numerals: 10. Base; 11. Hydraulic motor; 12. Radial pump; 13. Explosion-proof motor; 14. Series pump group; 15. Liquid inlet assembly; 16. Filter; 17. Cooler; 18. Saddle seat assembly; 19. Pump station controller; 20. Electric control reversing valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Most of the reciprocating piston pumps in coal mines, such as emulsion pumps and spray pumps used in traditional fully mechanized mining working faces, are fixed displacement pumps. Although a certain degree of flow regulation can be achieved through frequency converter speed regulation, the response time of frequency conversion speed regulation is relatively long, and due to the limitation of motor torque, effective speed regulation cannot be performed at low speeds. This makes it difficult for these pumps to meet the demand for real-time and precise flow regulation over a large range. The present invention proposes a variable flow radial piston pump. The pump drives the plunger pump input shaft through a hydraulic motor, and uses hydraulic valve regulation to achieve stepless speed regulation and precise speed regulation of the hydraulic motor, with a large speed regulation range. By changing the crankshaft speed, variable displacement control of the plunger pump can be effectively achieved, thereby solving the problems of inaccurate flow regulation and slow response speed in the prior art, and improving the performance and adaptability of reciprocating piston pumps in coal mines.

[0023] Combine the following Figure 1 , Figure 2 A specific embodiment of the variable flow radial piston pump device of the present invention is described.

[0024] The present invention provides a variable flow radial piston pump device, comprising: a base 10, used to integrate and support the structural components of the device; a hydraulic drive mechanism, installed on the base 10, used to provide hydraulic energy; a hydraulic motor 11, indirectly driven by the hydraulic drive mechanism, used to convert hydraulic energy into mechanical energy; a radial pump 12, connected to the hydraulic motor 11, and realizing displacement control by changing the crankshaft speed of the radial pump 12; a hydraulic valve assembly, arranged on the hydraulic pipeline between the hydraulic drive mechanism and the hydraulic motor 11, used to adjust the oil flow entering the hydraulic motor 11. The device realizes a wide range and high-precision flow regulation of the radial piston pump by adopting the design of the hydraulic motor 11 combined with the hydraulic valve group, while ensuring that the high efficiency and stable working performance can be maintained even in the low flow range.

[0025] Specifically, the hydraulic motor 11 can convert the hydraulic energy provided by the hydraulic drive mechanism into mechanical energy (torque and speed) to drive the radial pump 12, and through the control of the valve, the hydraulic motor 11 can ensure high torque to drive the radial pump 12 at different speeds to achieve the purpose of variable flow. By controlling the hydraulic motor 11 through the hydraulic valve assembly, accurate variable flow control within a large flow range can be achieved, and because a hydraulic transmission system is used, it is suitable for harsh environments such as dust, moisture, and even water immersion, and has high reliability and safety. In addition, the structure of the radial pump 12 allows the variable pump to achieve a higher displacement, and compared with the traditional direct motor speed change method, it can provide accurate flow regulation within a low flow range, meeting the needs of complex working conditions underground in coal mines.

[0026] In use, when the flow of the pump needs to be adjusted, the operator can set the target flow through the control system, and the hydraulic valve assembly responds quickly according to the command to adjust the oil flow entering the hydraulic motor 11, thereby changing the speed of the hydraulic motor 11, realizing the change of the crankshaft speed of the radial pump 12, thereby changing the displacement of the pump, and finally achieving the required flow change. Due to the rapid response characteristics of the hydraulic system, real-time flow control capabilities are provided.

[0027] Furthermore, in order to improve transmission efficiency and stability, a spline connection is preferably provided inside the motor to match the input shaft of the radial pump 12, to ensure the smoothness of power transmission and reduce energy loss. In addition, considering the special working environment underground in coal mines, the device can preferably also adopt explosion-proof design and waterproof sealing measures to enhance the safety and durability of the equipment. At the same time, in view of the wear problems that may arise from long-term operation, key components such as hydraulic valve assemblies and pump bodies are preferably specially reinforced and optimized to extend the overall service life. In addition, the device can also be equipped with an intelligent monitoring system for real-time monitoring of equipment status, early warning of potential faults, and further ensuring the safe and reliable operation of the system.

[0028] According to a variable flow radial piston pump device of the present invention, the hydraulic drive mechanism includes an explosion-proof motor 13 and a series pump group 14; wherein the explosion-proof motor 13 is used to drive the series pump group 14 to pressurize the oil; a bell-shaped cover assembly is arranged between the explosion-proof motor 13 and the series pump group 14 to protect the transmission structure inside it. Specifically, the explosion-proof motor 13 provides stable power output under the premise of ensuring safety, and directly drives the series pump group 14 through mechanical connection, which is composed of a series of pump bodies connected in series to achieve the pressure increase of the oil. The bell-shaped cover assembly not only plays the role of isolating harmful substances such as external dust and moisture, but also can effectively absorb and reduce the noise and vibration generated during operation, protect the internal precision transmission components from the influence of the external environment, and also enhance the sealing and explosion-proof performance of the entire system. In addition, a lubrication system and a temperature monitoring device are preferably provided in the bell-shaped cover to ensure smoothness and safety under long-term operation, thereby providing a continuous and stable high-pressure oil source for the hydraulic motor 11, and supporting the radial piston pump to achieve precise flow control.

[0029] According to a variable flow radial piston pump device of the present invention, the hydraulic drive mechanism also includes a liquid inlet component 15; the liquid inlet component 15 is connected to the series pump group 14 and is used to extract the oil in the oil tank; the hydraulic valve component includes an electrically controlled reversing valve 20 connected to the liquid outlet of the series pump group 14. Specifically, the liquid inlet component 15 may include, for example, a suction pipe, a filtering mechanism, and a one-way valve. When the explosion-proof motor 13 drives the series pump group 14 to work, the liquid inlet component 15 is responsible for introducing the oil from the oil tank into the series pump group 14 for pressurization. Subsequently, the pressurized high-pressure oil flows to the hydraulic valve component through the liquid outlet of the series pump group 14. The electrically controlled reversing valve 20 in the hydraulic valve component here can quickly adjust the valve state according to the instructions issued by the control system, accurately control the flow direction and flow of the oil, and then adjust the working parameters (such as speed and torque) of the hydraulic motor 11 to achieve effective control of the displacement of the radial piston pump.

[0030] In addition, the electric control reversing valve 20 can adjust the oil flow direction and flow rate in a short time, meeting the requirements of real-time flow control in the complex working conditions of coal mines. In order to further improve the reliability and safety of the system, the electric control reversing valve 20 can also be equipped with a feedback mechanism to monitor its working status in real time and transmit information to the control system so that corresponding adjustments can be made in time to ensure the smooth and efficient operation of the system. Preferably, the above-mentioned hydraulic valve assembly can also include a proportional flow control valve, a pressure compensation valve, a relief valve, a pressure reducing valve, a sequence valve, etc., to further improve the performance and adaptability of the system. According to a variable flow radial piston pump device of the present invention, a filter 16 is provided in series at the oil outlet of the hydraulic motor 11 for filtering the oil on the oil return path of the hydraulic motor 11; and / or a cooler 17 is provided in series at the oil outlet of the hydraulic motor 11 for cooling the oil on the oil return path of the hydraulic motor 11. Specifically, the filter 16 is installed at the oil outlet of the hydraulic motor 11, and can effectively remove impurities and particulate matter in the oil before the oil returns to the oil tank, preventing these pollutants from entering the system circulation again, thereby protecting the hydraulic components from wear and tear and extending the service life of the equipment. Secondly, the cooler 17 solves the problem caused by the increase in oil temperature during operation. The hydraulic system generates heat when working. If the oil temperature is too high, it will not only affect the viscosity characteristics of the hydraulic oil, but also may cause the performance of the hydraulic components to decline or even be damaged. By arranging the cooler 17 on the oil return path, the oil temperature can be effectively controlled within an appropriate range, ensuring the normal operation of the hydraulic system, and helping to maintain the quality and lubrication effect of the oil.

[0031] Preferably, the oil outlet of the hydraulic motor 11 is connected in series with the filter 16 and the cooler 17, and the oil is first removed by the filter 16 and then cooled by the cooler 17, so as to avoid further oxidation or polymerization of the impurities at high temperature, which may affect the filtering effect. Since the cooler 17 usually contains a fine heat exchange structure, the pre-filter 16 can protect the cooler 17 from being blocked or damaged by large particles of impurities, thereby ensuring its efficient heat exchange performance.

[0032] A variable flow radial piston pump device according to the present invention also includes a saddle assembly 18, which is arranged on the base 10, and is used to carry the hydraulic motor 11 and the radial pump 12, and plays a protective role between the hydraulic motor 11 and the radial pump 12. Specifically, the saddle assembly 18 not only provides a stable support platform, ensures the smooth operation of the hydraulic motor 11 and the radial pump 12, and reduces mechanical wear and noise. The transmission connection structure between the hydraulic motor 11 and the radial pump 12 is preferably hidden in the saddle, so that the saddle assembly structure can play a protective role on the transmission connection structure. Preferably, the saddle assembly 18 can also integrate a shock-absorbing design, by using rubber pads or other elastic materials to absorb vibrations during operation, further improving the stability of the system and protecting the internal precision transmission components from damage.

[0033] According to a variable flow radial piston pump device of the present invention, the base 10 is rectangular, and the hydraulic drive mechanism and the saddle assembly 18 are respectively arranged at different positions in the length direction of the base 10; wherein, the hydraulic motor 11 is arranged on the side of the saddle assembly 18 facing the hydraulic drive mechanism, and the first hydraulic pipeline system for driving the hydraulic motor 11 is centrally arranged in the area between the hydraulic drive mechanism and the saddle assembly 18; the radial pump 12 is arranged on the side of the saddle assembly 18 facing away from the hydraulic drive mechanism, and the second hydraulic pipeline system driven by the radial pump 12 is arranged in the area on the side of the saddle assembly 18 away from the first hydraulic pipeline system. The layout design of this embodiment realizes an optimized configuration with clear functional divisions, compact structure and easy maintenance. By rationally planning the positional relationship of each component, compact and efficient space utilization is achieved, the pipeline layout is simplified, and the maintainability of the system is enhanced.

[0034] Specifically, the hydraulic drive mechanism is located at one end of the base 10 and is responsible for providing hydraulic energy to drive the hydraulic motor 11. It is connected to the hydraulic motor 11 through a first hydraulic pipeline system, ensuring that the energy transfer path is short and efficient, reducing energy loss and improving response speed.

[0035] The saddle assembly 18, as a supporting structure, not only carries the hydraulic motor 11 and the radial pump 12, but also cleverly divides two main working areas: one side is the first hydraulic pipeline system working area facing the hydraulic drive mechanism, and the other side is the second hydraulic pipeline system working area away from the hydraulic drive mechanism. This arrangement makes the functions of each part more specialized, avoids the complexity and potential failure points caused by the crossing of pipelines, and provides sufficient space for wiring and maintenance for each system. The radial pump 12 is arranged on the side of the saddle assembly 18 away from the hydraulic drive mechanism, which not only ensures the effective isolation of the pump body and the drive source, reduces mutual interference, but also provides conditions for the independent operation of the radial pump 12.

[0036] According to a variable flow radial piston pump device of the present invention, a plurality of standardized assembly stations are arranged along the length direction of the base 10, and the various structural components of the device are detachably mounted on the assembly stations. Each standardized assembly station is precisely designed to ensure that different components can be accurately installed in predetermined positions, and can be quickly connected and separated through a unified standard interface, which is convenient for initial installation and for flexible adjustment of the configuration according to changes in working conditions in the later stage. By arranging a plurality of standardized assembly stations along the length direction of the base 10, a flexible, efficient and easy-to-maintain design scheme for a variable flow radial piston pump device is provided.

[0037] When a component needs to be repaired or replaced, it only needs to be removed from the corresponding assembly station without affecting the work of other parts, which greatly reduces the maintenance time and downtime costs. All assembly stations adopt standardized interface design to improve compatibility and facilitate expansion and upgrading. In the face of different application scenarios or special requirements, the system layout can be adjusted by rearranging the positions of each module to meet the needs of specific tasks, such as getting closer to the control center or changing the position of the cooler 17.

[0038] A variable flow radial piston pump device according to the present invention also includes a pump station controller 19, which is arranged on the base 10 and is used to control the hydraulic drive mechanism and the hydraulic valve assembly. Among them, the pump station controller 19, as the "brain" of the system, integrates advanced control algorithms and real-time monitoring functions to ensure the efficiency and stability of the system operation. By receiving instructions from the operator or preset programs, the pump station controller 19 can intelligently adjust the speed, direction and output torque of the hydraulic motor 11, and dynamically control the hydraulic valve assembly to achieve precise regulation of oil flow and pressure. In addition, the pump station controller 19 is preferably equipped with a variety of sensor interfaces, such as pressure sensors and temperature sensors, which can collect system operation data in real time, provide comprehensive status monitoring, detect potential problems in time and support preventive maintenance. The pump station controller 19 can also preferably have built-in safety protection mechanisms, such as overload protection, overpressure protection and emergency stop functions, which can take immediate measures to prevent accidents when abnormal conditions are detected.

[0039] Furthermore, a variable flow radial piston pump device according to the present invention includes a monitoring module connected to the pump station controller 19, which is used to monitor the abnormal operating state of the device, and the monitoring module includes any of the following sensors. The present invention also provides one or more sensors: a temperature sensor, arranged on the hydraulic motor 11 and / or the radial pump 12, for monitoring the working temperature; a pressure sensor, arranged on any hydraulic pipeline, for monitoring the oil pressure; a flow sensor, installed at the oil outlet of the hydraulic motor 11, for measuring the oil flow; a vibration sensor, installed on the hydraulic drive mechanism and / or the radial pump 12, for detecting abnormal vibration.

[0040] Specifically, the data provided by these sensors is continuously transmitted to the pump station controller 19, allowing the controller to make intelligent decisions based on real-time monitoring information. For example, when the temperature sensor detects that the temperature of the hydraulic motor 11 or radial pump 12 exceeds the safe range, the pump station controller 19 can automatically adjust the operating parameters or issue an alarm to prompt the operator to take action. Similarly, if the pressure sensor detects that the oil pressure in the hydraulic pipeline is abnormally high, the pump station controller 19 will respond quickly and adjust the hydraulic valve assembly to restore the normal pressure level, or trigger the protection mechanism when necessary. The data from the flow sensor helps maintain a stable displacement output, while the readings from the vibration sensor are used to assess the health of the mechanical equipment and prevent failures caused by wear or other problems in a timely manner.

[0041] Furthermore, according to a variable flow radial piston pump device of the present invention, the pump station controller 19 is integrated with a protection circuit, which is used to automatically cut off the power supply and stop the operation of the hydraulic drive mechanism when the monitoring module detects an abnormal operating state, ensuring that the operation can be stopped immediately when a serious abnormality occurs, preventing the situation from escalating, and ensuring the safety of equipment and personnel. On the other hand, a safety valve can also be preferably provided on the hydraulic pipeline of the device to release the pressure when the oil pressure exceeds a limit value.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable flow radial piston pump device, characterized in that: include: A base for integrating and supporting the structural components of the device; A hydraulic drive mechanism, mounted on the base, for providing hydraulic energy; a hydraulic motor, driven indirectly by the hydraulic drive mechanism, for converting the hydraulic energy into mechanical energy; A radial pump connected to the hydraulic motor, and realizing displacement control by changing the crankshaft speed of the radial pump; The hydraulic valve assembly is arranged on the hydraulic pipeline between the hydraulic drive mechanism and the hydraulic motor, and is used to adjust the oil flow entering the hydraulic motor.

2. The variable flow radial piston pump device according to claim 1, characterized in that: The hydraulic drive mechanism includes an explosion-proof motor and a series pump group; Wherein, the explosion-proof motor is used to drive the series pump group to pressurize the oil; A bell-shaped cover assembly is arranged between the explosion-proof motor and the series pump group to protect the internal transmission structure thereof.

3. The variable flow radial piston pump device according to claim 2, characterized in that: The hydraulic drive mechanism also includes a liquid inlet assembly; The liquid inlet assembly is connected to the series pump assembly and is used to extract the oil in the oil tank; The hydraulic valve assembly includes an electrically controlled reversing valve connected to a fluid outlet of the series pump group.

4. The variable flow radial piston pump device according to claim 1, characterized in that: A filter is provided in series with the oil outlet of the hydraulic motor for filtering the oil on the oil return path of the hydraulic motor; And / or, a cooler is provided in series with the oil outlet of the hydraulic motor for cooling the oil on the oil return path of the hydraulic motor.

5. The variable flow radial piston pump device according to claim 1, characterized in that: It also includes a saddle assembly, which is arranged on a base and is used to carry the hydraulic motor and the radial pump and play a protective role between the hydraulic motor and the radial pump.

6. The variable flow radial piston pump device according to claim 5, characterized in that: The base is rectangular, and the hydraulic drive mechanism and the saddle assembly are respectively arranged at different positions in the length direction of the base; Wherein, the hydraulic motor is arranged on a side of the saddle assembly facing the hydraulic drive mechanism, and a first hydraulic pipeline system for driving the hydraulic motor is centrally arranged in an area between the hydraulic drive mechanism and the saddle assembly; The radial pump is arranged on a side of the saddle assembly facing away from the hydraulic drive mechanism, and the second hydraulic pipeline system driven by the radial pump is arranged in a side area of ​​the saddle assembly facing away from the first hydraulic pipeline system.

7. The variable flow radial piston pump device according to claim 6, characterized in that: The base is provided with a plurality of standardized assembly stations along its length direction, and various structural components of the device are detachably mounted on the assembly stations.

8. The variable flow radial piston pump device according to any one of claims 1 to 7, characterized in that: It also includes a pump station controller, which is arranged on the base and is used to control the hydraulic drive mechanism and the hydraulic valve assembly.

9. The variable flow radial piston pump device according to claim 8, characterized in that: A monitoring module connected to the pump station controller is included to monitor the abnormal operation state of the device, and the monitoring module includes any one or more of the following sensors: a temperature sensor, disposed on the hydraulic motor and / or the radial pump, for monitoring the operating temperature; Pressure sensor, installed on any hydraulic pipeline, used to monitor oil pressure; A flow sensor, installed at the oil outlet of the hydraulic motor, for measuring the oil flow; A vibration sensor is mounted on the hydraulic drive mechanism and / or the radial pump and is used to detect abnormal vibration.

10. The variable flow radial piston pump device according to claim 9, characterized in that: The pump station controller is integrated with a protection circuit, which is used to automatically cut off the power supply and stop the operation of the hydraulic drive mechanism when the monitoring module detects the abnormal operating state; And / or, a safety valve is provided on the hydraulic pipeline of the device for releasing pressure when the oil pressure exceeds a limit value.

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