CN110762084A - Hydraulic system and pumping machine - Google Patents
Hydraulic system and pumping machine Download PDFInfo
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- CN110762084A CN110762084A CN201911050030.2A CN201911050030A CN110762084A CN 110762084 A CN110762084 A CN 110762084A CN 201911050030 A CN201911050030 A CN 201911050030A CN 110762084 A CN110762084 A CN 110762084A
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- main oil
- temperature control
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- heat dissipation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a hydraulic system and a pumping machine, wherein the hydraulic system comprises: the main oil way is provided with a main oil pump, and a hydraulic oil outlet of the main oil pump is connected with a working device; the temperature control oil way is connected with the main oil pump, an oil delivery pump and a heat dissipation component which are mutually communicated are arranged on the temperature control oil way, the outlet end of the oil delivery pump is communicated with the inlet of a heat dissipation channel of the main oil pump, the outlet of the heat dissipation channel of the main oil pump is communicated with the inlet end of the heat dissipation component, and the outlet end of the heat dissipation component is communicated with the inlet end of the oil delivery pump. According to the hydraulic system provided by the invention, the main oil pump is actively cooled through the temperature control oil way, the heat dissipation capacity of the main oil pump is increased, the heat dissipation capacity of the main oil pump is matched with the actual load and the use environment, the working temperature of the main oil pump is ensured, and the service life of the main oil pump is prolonged.
Description
Technical Field
The invention relates to the technical field of cooling, in particular to a hydraulic system and a pumping machine.
Background
At present, concrete pumps are widely applied worldwide, and with the continuous development of the construction industry, common low-pressure small-displacement pumps cannot meet the use requirements of modern large-scale super high-rise buildings. Therefore, the concrete pump must be developed to an ultra-high pressure and a large discharge amount. The application of the ultrahigh-pressure large-displacement concrete pump has to improve the working pressure and the displacement of a main oil pump of a hydraulic system of the concrete pump, so that the load of the main oil pump is greatly increased, the temperature is increased, and the heat dissipation of the main oil pump has to be ensured.
In the related art, as shown in fig. 1, a main oil pump 102 'in a conventional hydraulic system is connected to a pumping assembly 104', a heat exchange component 108 'and an oil tank 106', and heat dissipation of the main oil pump 102 'is mainly natural heat dissipation (heat dissipation may have partial air-cooled heat dissipation by using a main oil pump 102' of a concrete pump in which an internal combustion engine is used as a main power). When the ambient temperature is not changed, the heat dissipation of the main oil pump 102 'cannot be guaranteed during high-pressure and high-displacement operation, which may cause overheating of the main oil pump 102'. The temperature of the main oil pump 102 'is not controlled, resulting in a great reduction in the operating efficiency and the service life of the main oil pump 102'.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, a first aspect of the invention provides a hydraulic system.
In a second aspect, the present invention provides a pumping machine.
A first aspect of the present invention provides a hydraulic system comprising: the main oil way is provided with a main oil pump, and a hydraulic oil outlet of the main oil pump is connected with a working device; the temperature control oil way is connected with the main oil pump, an oil delivery pump and a heat dissipation component which are mutually communicated are arranged on the temperature control oil way, the outlet end of the oil delivery pump is communicated with the inlet of a heat dissipation channel of the main oil pump, the outlet of the heat dissipation channel of the main oil pump is communicated with the inlet end of the heat dissipation component, and the outlet end of the heat dissipation component is communicated with the inlet end of the oil delivery pump.
The hydraulic system provided by the invention comprises a main oil way and a temperature control oil way, wherein a main oil pump is arranged on the main oil way, a hydraulic oil outlet of the main oil pump is connected with a working device, and the main oil way provides hydraulic oil for the working device so as to ensure the working device to work; the temperature control oil way is connected with the main oil pump and can cool the main oil pump. Specifically, an oil delivery pump and a heat dissipation component which are mutually communicated are arranged on the temperature control oil way, the outlet end of the oil delivery pump is communicated with the inlet of a heat dissipation channel of the main oil pump, the outlet of the heat dissipation channel of the main oil pump is communicated with the inlet end of the heat dissipation component, and the outlet end of the heat dissipation component is communicated with the inlet end of the oil delivery pump. Under the drive of the oil delivery pump, liquid in the temperature control oil way can sequentially pass through the heat dissipation component and the heat dissipation channel of the main oil pump. After the liquid in the temperature control oil way enters a heat dissipation channel of the main oil pump, the liquid can take away the heat of the main oil pump to cool the main oil pump; then, the liquid in the temperature control oil way is contacted with a heat dissipation part, and the heat dissipation part can take away the heat of the liquid and reduce the temperature of the liquid in the temperature control oil way; the obtained cooled liquid enters the heat dissipation channel of the main oil pump again to form a circulating oil path, so that the main oil pump is cooled continuously, the normal work of the main oil path is ensured, and the main oil pump can continuously supply oil for working parts. Specifically, the oil delivery pump, the heat dissipation component and the heat dissipation channel of the main oil pump form an outer circulation pipeline of the temperature control oil way, and liquid in the temperature control oil way circularly flows in the outer circulation pipeline so as to cool the main oil pump.
According to the hydraulic system provided by the invention, the main oil pump is actively cooled through the temperature control oil way, the heat dissipation capacity of the main oil pump is increased, the heat dissipation capacity of the main oil pump is matched with the actual load and the use environment, the working temperature of the main oil pump is ensured, and the service life of the main oil pump is prolonged.
The hydraulic system according to the above technical solution of the present invention may further have the following additional technical features:
in the above technical solution, preferably, the temperature-controlled oil path further includes: the branch pipeline is connected with the heat dissipation component in parallel; the inlet end of the reversing component is communicated with the outlet of the heat dissipation channel of the main oil pump, the first outlet of the reversing component is communicated with the heat dissipation component, and the second outlet of the reversing component is communicated with the inlet end of the oil delivery pump through a branch pipeline.
In the technical scheme, the temperature control oil circuit further comprises a branch pipeline and a reversing component, wherein the branch pipeline is connected with the heat radiating component in parallel, the inlet end of the reversing component is communicated with the outlet of the heat radiating channel of the main oil pump, the first outlet of the reversing component is communicated with the heat radiating component, the second outlet of the reversing component is communicated with the inlet end of the oil delivery pump through the branch pipeline, and the reversing component can change the flowing direction of liquid in the temperature control oil circuit. Through the setting of switching-over part and branch road pipeline, can realize the different functions of control by temperature change oil circuit for liquid in the control by temperature change oil circuit optionally heats up or cools down for the main oil pump, promotes the adaptability of control by temperature change oil circuit. Specifically, the oil delivery pump, the branch pipeline and the heat dissipation channel of the main oil pump form an inner circulation pipeline of the temperature control oil way, liquid in the temperature control oil way flows in the inner circulation pipeline in a circulating mode, the liquid directly circulates under the condition that heat is not dissipated, the oil temperature can be improved, and then the temperature of the main oil pump is raised.
Specifically, when the main oil pump is cold started at a low temperature, the main oil pump can work only when the temperature of the main oil pump rises to a certain value, in order to improve the temperature rise speed of the main oil pump, the temperature rise waiting time is shortened, the reversing component controls the oil transfer pump to be communicated with the branch pipeline, at the moment, the oil transfer pump drives liquid in the temperature control oil way to sequentially pass through the branch pipeline and a heat dissipation channel of the main oil pump, the liquid in the temperature control oil way is not in contact with the heat dissipation component and directly passes through the branch pipeline and then is in contact with the main oil pump, the temperature rise speed of the main oil pump is improved, and. When the main oil pump needs to be cooled, the reversing component controls the oil transfer pump to be communicated with the heat dissipation component, and at the moment, liquid in the oil transfer pump driving temperature control oil way can sequentially pass through the heat dissipation component and the heat dissipation channel of the main oil pump, so that the heat of the liquid in the temperature control oil way can be taken away by the heat dissipation component, and the main oil pump is cooled.
In any of the above technical solutions, preferably, the method further includes: the temperature detection module is arranged on the main oil path or the temperature control oil path or the main oil pump and is used for acquiring the temperature of the inner side or the surface of the main oil path or the temperature control oil path or the main oil pump; the temperature control module is connected with the temperature detection module and the reversing component and is used for controlling the oil transfer pump to be communicated with the heat dissipation component when the temperature value obtained by the temperature detection module is greater than or equal to a first threshold value; and when the temperature value obtained by the temperature detection module is smaller than a second threshold value, the oil transfer pump is controlled to be communicated with the branch pipeline, wherein the second threshold value is smaller than or equal to the first threshold value.
In the technical scheme, the hydraulic system provided by the invention further comprises a temperature detection module and a temperature control module which are matched for use. The temperature detection module can acquire the temperature of the inner side or the surface of the main oil path or the temperature control oil path or the main oil pump, and the temperature control module can control the reversing component to work according to the detection result of the temperature detection module, so that the main oil pump is communicated with the heat dissipation component or communicated with the branch pipeline, the switching of the hydraulic system between the outer circulation pipeline and the inner circulation pipeline is realized, and the adaptability of the hydraulic system is improved. Specifically, the temperature detection module may be disposed on the main oil path or the temperature control oil path or the main oil pump.
Specifically, when the temperature value obtained by the temperature detection module is greater than or equal to a first threshold value, the temperature of the main oil pump is over-high, the reversing component is controlled by the temperature control module to be communicated with the oil delivery pump and the heat dissipation component, and liquid in the temperature control oil way is cooled for the main oil pump through the outer circulation pipeline; when the temperature value obtained by the temperature detection module is smaller than a second threshold value, the temperature of the main oil pump is low (which can be regarded as a cold start stage), the temperature control module controls the control reversing component to communicate the oil delivery pump and the branch pipeline, and the liquid in the temperature control oil way directly circulates under the condition of no heat dissipation through the internal circulation pipeline; when the temperature value obtained by the temperature detection module is between the first threshold value and the second threshold value, the temperature control oil circuit is not started, and the optimal temperature adjustment can be realized through the temperature control oil circuit.
Specifically, for the specific values of the first threshold and the second threshold, those skilled in the art can set the values according to actual conditions, and the setting can be realized as long as the normal operation of the main oil pump can be ensured.
In any of the above technical solutions, preferably, the reversing component is a reversing valve, the temperature-controlled oil path further includes a flow-regulating valve, the flow-regulating valve is connected with the temperature control module, and the temperature control module is configured to control a flow rate of the liquid in the temperature-controlled oil path according to a detection result of the temperature detection module.
According to the technical scheme, the reversing component is a reversing valve, the temperature control oil way is provided with a flow regulating valve, the flow regulating valve is communicated with the temperature control module, and the temperature control module controls the opening of the flow regulating valve according to the detection result of the temperature detection module so as to regulate the flow of liquid in the temperature control oil way. Specifically, under the condition that the temperature value obtained by the temperature detection module is between a first threshold value and a second threshold value, the hydraulic system can maintain normal movement, and in order to ensure that the main oil way is in an optimal temperature range, the temperature control module adjusts the opening degree of the flow regulating valve according to the actual temperature of the main oil pump, so that the temperature adjusting capacity of the temperature control oil way is improved.
Specifically, when the temperature of the main oil pump is higher, the opening degree of the flow regulating valve is increased, and more liquid is ensured to be in contact with the main oil pump at the moment, so that the temperature of the main oil pump is reduced; when the temperature of main oil pump is lower, flow control valve's aperture reduces, guarantees less liquid and main oil pump contact this moment, and then for the main oil pump cooling.
In any of the above technical solutions, preferably, the reversing component is a temperature control valve, the temperature control valve is connected with a temperature control module, and the temperature control module is configured to control a flow rate of liquid in the temperature control oil line according to a detection result of the temperature detection module.
In the technical scheme, the reversing component adopts a temperature control valve, the temperature control valve is communicated with a temperature control module, and the temperature control module controls the opening of the temperature control valve according to the detection result of the temperature detection module so as to adjust the flow of liquid in a temperature control oil way. Specifically, under the condition that the temperature value obtained by the temperature detection module is between a first threshold and a second threshold, the hydraulic system can maintain normal movement, and in order to ensure that the main oil way is in an optimal temperature range, the temperature control module adjusts the opening degree of the temperature control valve according to the actual temperature of the main oil pump, so that the temperature adjustment capacity of the temperature control oil way is improved.
Specifically, when the temperature of the main oil pump is higher, the opening of the temperature control valve is increased, and more liquid is ensured to be in contact with the main oil pump, so that the temperature of the main oil pump is reduced; when the temperature of the main oil pump is lower, the opening degree of the temperature control valve is reduced, and less liquid is ensured to be in contact with the main oil pump, so that the main oil pump is cooled.
In any of the above technical solutions, preferably, the working device is a pumping assembly, an oil tank is further disposed on the main oil path, an inlet end of the pumping assembly is communicated with a hydraulic oil outlet of the main oil pump, an outlet end of the pumping assembly is communicated with an inlet end of the oil tank, and a hydraulic oil inlet of the main oil pump is communicated with the oil tank.
In the technical scheme, the working device is a pumping assembly, and an oil tank is further arranged on the main oil path. The inlet end of the pumping assembly is communicated with a hydraulic oil outlet of the main oil pump, the outlet end of the pumping assembly is communicated with the inlet end of the oil tank, a hydraulic oil inlet of the main oil pump is communicated with the oil tank, and hydraulic oil in the oil tank can return to the oil tank after passing through the pumping assembly under the driving of the main oil pump, so that the circulation of a main oil path is realized.
In any of the above technical solutions, preferably, the main oil path and the temperature control oil path are independent of each other, hydraulic oil is provided in the main oil path, and liquid in the temperature control oil path is cooling liquid; or the main oil way is communicated with the temperature control oil way, and the liquid in the temperature control oil way is the hydraulic oil in the main oil way.
In the technical scheme, the temperature control oil way can be arranged based on the main oil way and can also be arranged independently of the main oil way. When the temperature control oil way is arranged on the basis of the main oil way, the main oil way is communicated with the temperature control oil way, and the hydraulic oil in the main oil way is directly used as liquid in the temperature control oil way; when the temperature control oil way is arranged independently of the main oil way, the main oil way and the temperature control oil way are mutually independent, hydraulic oil is arranged in the main oil way, and liquid in the temperature control oil way is cooling liquid.
In any of the above technical solutions, preferably, a heat exchange component is disposed on the main oil path, and the heat exchange component of the main oil path and the heat dissipation component of the temperature-controlled oil path are independent of each other.
In the technical scheme, the main oil way has a heat dissipation function. The heat exchange component independent of the heat dissipation component is arranged on the main oil path, and therefore the heat exchange capacity is improved. The heat exchange member and the heat dissipation member may have the same structure or different structures.
In any of the above technical solutions, preferably, the main oil path and the temperature control oil path share the same heat dissipation component; the heat dissipation part comprises a first heat dissipation flow passage and a second heat dissipation flow passage, the first heat dissipation flow passage is communicated with the main oil way, and the second heat dissipation flow passage is communicated with the temperature control oil way.
In the technical scheme, the main oil way and the temperature control oil way share the same heat dissipation part, so that the structure is simplified and the cost is reduced. The heat dissipation part comprises a first heat dissipation flow passage and a second heat dissipation flow passage, the first heat dissipation flow passage is communicated with the main oil way and used for conveying hydraulic oil in the main oil way, and the second heat dissipation flow passage is communicated with the temperature control oil way and used for conveying liquid in the temperature control oil way, so that the hydraulic oil in the main oil way and the liquid in the temperature control oil way are prevented from being mixed, and the operation safety of the hydraulic system is ensured. Specifically, the first heat dissipation flow channel and the second heat dissipation flow channel are arranged at intervals, so that the heat exchange efficiency is prevented from being influenced mutually.
In a second aspect of the invention, there is provided a pumping machine comprising a master cylinder and a delivery cylinder connected to each other, and a hydraulic system according to any one of the first aspect of the invention, wherein the working device connected to the hydraulic system is the master cylinder.
The present invention proposes a pumping machine comprising a hydraulic system according to any one of the first aspect of the present invention, and therefore having all the advantages of the hydraulic system described above, which will not be discussed herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a hydraulic system in the related art.
Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:
102 'main oil pump, 104' pumping assembly, 106 'oil tank, 108' heat exchange component.
FIG. 2 is a schematic diagram of a hydraulic system according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a hydraulic system of yet another embodiment of the present invention;
FIG. 4 is a schematic diagram of a hydraulic system of yet another embodiment of the present invention;
FIG. 5 is a schematic diagram of a hydraulic system of yet another embodiment of the present invention;
fig. 6 is a schematic diagram of a hydraulic system according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 2 to 6 is:
102 main oil pump, 104 working device, 106 oil tank, 108 heat exchange component, 202 oil delivery pump, 204 heat dissipation component, 206 branch pipeline and 208 reversing component.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A hydraulic system and a pumping machine provided according to some embodiments of the present invention are described below with reference to fig. 2 to 6.
The first embodiment is as follows:
as shown in fig. 2, an embodiment of the present invention provides a hydraulic system, which includes a main oil passage and a temperature-controlled oil passage. Wherein, a main oil pump 102 is arranged on the main oil path, and a hydraulic oil outlet of the main oil pump 102 is connected with a working device 104; the temperature control oil circuit comprises an oil delivery pump 202 and a heat dissipation component 204 which are connected with each other, wherein the outlet end of the oil delivery pump 202 is communicated with the inlet of a heat dissipation channel of the main oil pump 102, the outlet of the heat dissipation channel of the main oil pump 102 is communicated with the inlet end of the heat dissipation component 204, and the outlet end of the heat dissipation component 204 is communicated with the inlet end of the oil delivery pump 202.
In this embodiment, the hydraulic system includes a main oil path and a temperature-controlled oil path, the temperature-controlled oil path is provided with an oil delivery pump 202 and a heat dissipation member 204 connected to each other, a flowable liquid is provided in the temperature-controlled oil path, and the liquid in the temperature-controlled oil path can sequentially pass through the heat dissipation member 204 and a heat dissipation channel of the main oil pump 102 under the driving of the main oil pump 102. After the liquid in the temperature control oil path enters the heat dissipation channel of the main oil pump 102, the heat of the main oil pump 102 can be taken away, so that the temperature of the main oil pump 102 is reduced; then, the liquid in the temperature control oil circuit is in contact with the heat dissipation part 204, and the heat dissipation part 204 can take away the heat of the liquid in the temperature control oil circuit and reduce the temperature of the liquid in the temperature control oil circuit; the obtained cooled liquid enters the heat dissipation channel of the main oil pump 102 again to form a circulating oil path so as to continuously cool the main oil pump 102, ensure the normal operation of the main oil path and ensure that the main oil pump 102 can continuously supply oil to the working parts.
Specifically, the oil delivery pump 202, the heat dissipation component 204 and the heat dissipation channel of the main oil pump 102 form an external circulation flow channel of the temperature control oil path, and the liquid in the temperature control oil path circulates in the external circulation flow channel, so as to cool the main oil pump 102.
According to the hydraulic system provided by the invention, the main oil pump 102 is actively cooled through the temperature control oil way, the heat dissipation capacity of the main oil pump 102 is increased, the heat dissipation capacity of the main oil pump 102 is matched with an actual load and a use environment, the working temperature of the main oil pump 102 is ensured, and the service life of the main oil pump 102 is prolonged. Specifically, the oil delivery pump 202 is a gear pump, and the heat dissipation member 204 is a heat sink.
Specifically, as shown in fig. 4, 5 and 6, the working device 104 is a pumping assembly, and a tank 106 is also provided on the main oil path. The inlet end of the pumping assembly is communicated with the hydraulic oil outlet of the main oil pump 102, the outlet end of the pumping assembly is communicated with the inlet end of the oil tank 106, the hydraulic oil inlet of the main oil pump 102 is communicated with the oil tank 106, and hydraulic oil in the oil tank 106 can be driven by the main oil pump 102 to return to the oil tank 106 through the pumping assembly, so that circulation of a main oil path is realized.
Example two:
as shown in fig. 3, according to another embodiment of the present invention, a hydraulic system includes a main oil passage and a temperature-controlled oil passage. The temperature control oil circuit is connected with the main oil pump 102 of the main oil circuit, the temperature control oil circuit comprises an oil delivery pump 202, a heat dissipation component 204, a branch pipeline 206 and a reversing component 208, the branch pipeline 206 is connected with the heat dissipation component 204 in parallel, and the reversing component 208 can change the flow direction of liquid in the temperature control oil circuit.
In this embodiment, the temperature-controlled oil circuit includes a heat dissipating component 204 and a branch pipeline 206 connected in parallel, and a reversing component 208 is disposed at an intersection of an inlet end of the branch pipeline 206 and an inlet end of the heat dissipating component 204, wherein the oil delivery pump 202, the heat dissipating component 204 and a heat dissipating channel of the main oil pump 102 form an external circulation channel of the temperature-controlled oil circuit, the oil delivery pump 202, the branch pipeline 206 and the heat dissipating channel of the main oil pump 102 form an internal circulation channel of the temperature-controlled oil circuit, and the reversing component 208 can control the oil delivery pump 202 to communicate with an internal circulation pipeline or an external circulation pipeline.
In the process of cold starting the main oil pump 102 at a low temperature, the reversing component 208 controls the oil delivery pump 202 to communicate with the branch pipeline 206, the oil delivery pump 202 drives the liquid in the temperature-controlled oil circuit to sequentially pass through the branch pipeline 206 and the heat dissipation channel of the main oil pump 102, and at this time, the liquid in the temperature-controlled oil circuit does not contact with the heat dissipation component 204, and circularly flows in the internal circulation channel, so as to heat the main oil pump 102.
When the main oil pump 102 needs to be cooled, the reversing component 208 controls the oil delivery pump 202 to be communicated with the heat dissipation component 204, the oil delivery pump 202 drives liquid in the temperature control oil path to sequentially pass through the heat dissipation component 204 and a heat dissipation channel of the main oil pump 102, and at the moment, the liquid in the temperature control oil path is in contact with the heat dissipation component 204 and circularly flows in the external circulation channel, so that the main oil pump 102 is cooled.
Further, the main oil pump 102 or the temperature-controlled oil circuit or the oil delivery pump 202 is provided with a temperature detection module (not shown in the figure), and the hydraulic system further includes a temperature control module (not shown in the figure) connected with the temperature detection module and the reversing component 208.
The temperature detection module can acquire the temperature of the main oil circuit or the temperature control oil circuit or the inner side or the surface of the main oil pump 102; the temperature control module can control the reversing component 208 to work according to the detection result of the temperature detection module, so that the oil transfer pump 202 is communicated with the heat dissipation component 204 or communicated with the branch pipeline, the switching of the hydraulic system between the external circulation pipeline and the internal circulation pipeline is realized, and the adaptability of the hydraulic system is improved. Specifically, the temperature detection module may be disposed on the main oil line or the temperature controlled oil line or the main oil pump 102.
Specifically, when the temperature value obtained by the temperature detection module is greater than or equal to the first threshold value, it indicates that the temperature of the main oil pump 102 is too high, at this time, the temperature control module controls the reversing component 208 to communicate the oil delivery pump 202 and the heat dissipation component 204, and the liquid in the temperature control oil path is cooled for the main oil pump 102 through the external circulation pipeline; when the temperature value obtained by the temperature detection module is smaller than the second threshold value, it is indicated that the temperature of the main oil pump 102 is too low (which can be regarded as a cold start stage), at this time, the temperature control module controls the control reversing component 208 to communicate the oil transfer pump 202 and the branch pipeline, and the liquid in the temperature control oil path directly circulates through the internal circulation pipeline without heat dissipation, so that the temperature of the main oil pump 102 can be raised; when the temperature value obtained by the temperature detection module is between the first threshold value and the second threshold value, the temperature control oil circuit is not started, and the optimal temperature adjustment can be realized through the temperature control oil circuit.
Specifically, the reversing component 208 can employ two of:
the reversing component 208 can adopt a temperature control valve, and the temperature control valve is communicated with the temperature control module; the temperature control module controls the opening of the temperature control valve according to the detection result of the temperature detection module, and then the flow of liquid in the temperature control oil way is adjusted. In order to ensure that the main oil circuit is in the optimal temperature range, the temperature control module adjusts the opening degree of the temperature control valve according to the actual temperature of the main oil pump 102, and the temperature adjustment capability of the temperature control oil circuit is improved.
The reversing component 208 may be a reversing valve, and a flow regulating valve (not shown in the figure) is disposed in the temperature-controlled oil path, the flow regulating valve is communicated with the temperature control module, and the temperature control module controls the opening degree of the flow regulating valve according to the detection result of the temperature detection module, so as to regulate the flow of the liquid in the temperature-controlled oil path. In order to ensure that the main oil path is in the optimal temperature range, the temperature control module adjusts the opening degree of the flow regulating valve according to the actual temperature of the main oil pump 102, and improves the temperature adjusting capacity of the temperature control oil path.
In any of the above embodiments, preferably, the main oil path and the temperature-controlled oil path are independent of each other, hydraulic oil is provided in the main oil path, and the liquid in the temperature-controlled oil path is cooling liquid.
In any of the above embodiments, preferably, the main oil passage and the temperature-controlled oil passage are communicated with each other, and the liquid in the temperature-controlled oil passage is hydraulic oil in the main oil passage.
In any of the above embodiments, preferably, as shown in fig. 4, the main oil passage itself has a heat radiation function. The heat exchange member 108 independent of the heat radiating member 204 is provided on the main oil path, thereby improving the heat exchange capability. The heat exchange member 108 and the heat dissipation member 204 may have the same structure or different structures.
In any of the above embodiments, preferably, as shown in fig. 5, the main oil path and the temperature control oil path share the same heat dissipation component 204, where the heat dissipation component 204 includes a first heat dissipation flow path (not shown) and a second heat dissipation flow path (not shown), the first heat dissipation flow path is communicated with the main oil path and is used for conveying hydraulic oil in the main oil path, and the second heat dissipation flow path is communicated with the temperature control oil path and is used for conveying liquid in the temperature control oil path, so as to avoid mixing of the hydraulic oil in the main oil path and the liquid in the temperature control oil path, and ensure the operation safety of the hydraulic system. Specifically, the first heat dissipation flow channel and the second heat dissipation flow channel are arranged at intervals, so that the heat exchange efficiency is prevented from being influenced mutually.
Example three:
the invention further provides a pumping machine, which comprises a main oil cylinder and a delivery cylinder which are connected with each other, and a hydraulic system according to any one of the above embodiments of the invention, wherein the working device connected with the hydraulic system is the main oil cylinder.
The present invention proposes a pumping machine comprising a hydraulic system according to any one of the first aspect of the present invention, and therefore having all the advantages of the hydraulic system described above, which will not be discussed herein.
In particular, the hydraulic system provided by any one of the embodiments has an active cooling function. Therefore, the construction safety of the pumping machine can be effectively improved.
The specific embodiment is as follows:
as shown in fig. 6, in the present invention, a temperature control oil path is added on the basis of the main oil path, a gear pump is connected in series to the end of the main oil pump 102, and the gear pump delivers the low-temperature hydraulic oil cooled by the heat dissipation component 204, thereby realizing forced cooling of the main oil pump 102.
Specifically, as shown in fig. 6, the gear pump delivers low-temperature hydraulic oil to enter the heat dissipation channel inlet of the main oil pump 102, and the low-temperature hydraulic oil flows through the main oil pump 102 and then carries away heat generated by the operation of the main oil pump 102; when the main oil pump 102 starts the equipment at a low temperature or in a cold state, the hydraulic oil flowing out of the outlet of the heat dissipation channel of the main oil pump 102 is controlled by the temperature control valve to flow into the oil inlet of the gear pump without flowing to the heat dissipation part 204, the uncooled hydraulic oil flows back to the main oil pump 102 again to heat the main oil pump 102, and the main oil pump 102 is rapidly increased to a normal working temperature; when the temperature of the main oil pump 102 rises to a temperature required to be cooled, the temperature control valve adjusts the flow direction of the hydraulic oil from the outlet of the heat dissipation channel of the main oil pump 102 to the heat dissipation component 204, and after the hydraulic oil is cooled by the heat dissipation component 204 to take away heat, the cooled hydraulic oil is introduced to flow to the gear pump and is conveyed to the heat dissipation channel of the main oil pump 102 so as to cool the main oil pump 102.
According to the invention, the flow direction of the cooling liquid is controlled by the temperature control valve, so that the main oil pump 102 can be rapidly heated and cooled; the temperature signal of the main oil pump 102 is collected and monitored, and the control module processes the temperature signal and sends an instruction to control the electromagnetic temperature control valve, so that the temperature of the main oil pump 102 is accurately controlled in a closed loop; in order to reduce the cost, a mechanical wax thermostat is used as a temperature control valve, and the flow direction of cooling hydraulic oil is automatically adjusted through the oil temperature, so that the temperature of the main oil pump 102 is controlled; the temperature control valve can be directly omitted from the equipment working in the high-temperature environment, so that the cooling hydraulic oil directly flows to the heat dissipation component 204.
The cooling control method of the main oil pump 102 can be electric signal closed-loop control, wax type thermostat control and direct external circulation cooling control.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hydraulic system, comprising:
the main oil way is provided with a main oil pump, and a hydraulic oil outlet of the main oil pump is connected with a working device;
the temperature control oil way is connected with the main oil pump, an oil delivery pump and a heat dissipation component which are mutually communicated are arranged on the temperature control oil way, the outlet end of the oil delivery pump is communicated with the inlet of a heat dissipation channel of the main oil pump, the outlet of the heat dissipation channel of the main oil pump is communicated with the inlet end of the heat dissipation component, and the outlet end of the heat dissipation component is communicated with the inlet end of the oil delivery pump.
2. The hydraulic system of claim 1, wherein the temperature controlled oil circuit further comprises:
a branch pipe arranged in parallel with the heat dissipation member;
the inlet end of the reversing component is communicated with the outlet of the heat dissipation channel of the main oil pump, the first outlet of the reversing component is communicated with the heat dissipation component, and the second outlet of the reversing component is communicated with the inlet end of the oil delivery pump through the branch pipeline.
3. The hydraulic system of claim 2, further comprising:
the temperature detection module is arranged on a main oil way or the temperature control oil way or the main oil pump and is used for acquiring the temperature of the inner side or the surface of the main oil way or the temperature control oil way or the main oil pump;
the temperature control module is connected with the temperature detection module and the reversing component and is used for controlling the oil transfer pump to be communicated with the heat dissipation component when the temperature value obtained by the temperature detection module is greater than or equal to a first threshold value; and is used for controlling the oil transfer pump to be communicated with the branch pipeline when the temperature value obtained by the temperature detection module is smaller than a second threshold value,
wherein the second threshold is less than or equal to the first threshold.
4. The hydraulic system of claim 3,
the reversing component is a reversing valve, the temperature control oil way further comprises a flow regulating valve, the flow regulating valve is connected with the temperature control module, and the temperature control module is used for controlling the flow of liquid in the temperature control oil way according to the detection result of the temperature detection module.
5. The hydraulic system of claim 3,
the reversing component is a temperature control valve, the temperature control valve is connected with the temperature control module, and the temperature control module is used for controlling the flow of liquid in the temperature control oil way according to the detection result of the temperature detection module.
6. The hydraulic system of any one of claims 1 to 5,
the working device is a pumping assembly, an oil tank is further arranged on the main oil path, the inlet end of the pumping assembly is communicated with the hydraulic oil outlet of the main oil pump, the outlet end of the pumping assembly is communicated with the inlet end of the oil tank, and the hydraulic oil inlet of the main oil pump is communicated with the oil tank.
7. The hydraulic system of any one of claims 1 to 5,
the main oil way and the temperature control oil way are independent from each other, hydraulic oil is arranged in the main oil way, and liquid in the temperature control oil way is cooling liquid; or
The main oil way is communicated with the temperature control oil way, and the liquid in the temperature control oil way is hydraulic oil in the main oil way.
8. The hydraulic system of any one of claims 1 to 5,
and the heat exchange component of the main oil way and the heat dissipation component of the temperature control oil way are independent from each other.
9. The hydraulic system of any one of claims 1 to 5,
the main oil way and the temperature control oil way share the same heat dissipation component;
the heat dissipation part comprises a first heat dissipation flow passage and a second heat dissipation flow passage, the first heat dissipation flow passage is communicated with the main oil way, and the second heat dissipation flow passage is communicated with the temperature control oil way.
10. A pumping machine comprising a master cylinder and a delivery cylinder connected to each other, and a hydraulic system according to any one of claims 1 to 9, the working device connected to the hydraulic system being the master cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050030.2A CN110762084A (en) | 2019-10-31 | 2019-10-31 | Hydraulic system and pumping machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911050030.2A CN110762084A (en) | 2019-10-31 | 2019-10-31 | Hydraulic system and pumping machine |
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| CN110762084A true CN110762084A (en) | 2020-02-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677723A (en) * | 2020-05-08 | 2020-09-18 | 中国北方车辆研究所 | Heat dissipation loop suitable for high-power movable closed hydraulic system |
| CN112492943A (en) * | 2020-12-15 | 2021-03-16 | 塔里木大学 | Orchard traction type double-fertilizer-box variable fertilizer applicator and fertilizing method |
| CN112503061A (en) * | 2020-11-27 | 2021-03-16 | 浙江盈亿机械股份有限公司 | Oil temperature constant temperature intelligent control system |
| CN113530910A (en) * | 2021-09-16 | 2021-10-22 | 山东省高速路桥养护有限公司 | Hydraulic system of side slope trimmer |
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2019
- 2019-10-31 CN CN201911050030.2A patent/CN110762084A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677723A (en) * | 2020-05-08 | 2020-09-18 | 中国北方车辆研究所 | Heat dissipation loop suitable for high-power movable closed hydraulic system |
| CN112503061A (en) * | 2020-11-27 | 2021-03-16 | 浙江盈亿机械股份有限公司 | Oil temperature constant temperature intelligent control system |
| CN112492943A (en) * | 2020-12-15 | 2021-03-16 | 塔里木大学 | Orchard traction type double-fertilizer-box variable fertilizer applicator and fertilizing method |
| CN113530910A (en) * | 2021-09-16 | 2021-10-22 | 山东省高速路桥养护有限公司 | Hydraulic system of side slope trimmer |
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