Power head speed reducer cooling system and method and engineering equipment

Abstract

The invention provides a power head speed reducer heat dissipation system and method and engineering equipment, the power head speed reducer heat dissipation system comprises a heat dissipation assembly and a driving assembly, the heat dissipation assembly comprises a lubricating oil tank, an oil delivery pump and a speed reducer which are connected in sequence, and the speed reducer is connected with the lubricating oil tank to form a circulating oil way; the driving assembly is in transmission connection with the oil delivery pump, and the driving assembly is used for driving the oil delivery pump to operate so as to convey lubricating oil in the lubricating oil tank into the speed reducer, so that the speed reducer is cooled; the heat dissipation assembly further comprises a control unit and a temperature sensor, the temperature sensor is connected with the speed reducer, and the control unit is in electric signal connection with the temperature sensor and the driving assembly. The control unit is used for controlling operation of the driving assembly according to the lubricating oil temperature detected by the temperature sensor. The power head speed reducer cooling system can cool the speed reducer, the working stability of the speed reducer is guaranteed, and the service life of the speed reducer is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a heat dissipation system and method for a power head reducer, and engineering equipment. Background Art

[0002] A rotary drilling rig is a common type of construction machinery. The power head is the core component of the rotary drilling rig. The power head is driven by a hydraulic motor. Specifically, the hydraulic motor is connected to a reducer, which in turn is connected to the power head. During operation, the hydraulic motor drives the power head through the reducer.

[0003] Under some working conditions, the rotation speed of the power head is relatively high, which makes the reducer directly connected to the power head work under a larger workload and generates a large amount of heat. However, current rotary drilling rigs are generally not equipped with a cooling system for the reducer, which makes the reducer prone to overheating, not only affecting the normal operation of the reducer, but also reducing the service life of the reducer. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat dissipation system for a power head reducer, which can dissipate heat and cool the reducer, ensure the working stability of the reducer, and extend the service life of the reducer.

[0005] The present invention provides a heat dissipation system for a power head reducer, comprising a heat dissipation component and a drive component. The heat dissipation component comprises a lubricating oil tank, an oil pump, and a reducer connected in sequence. The reducer is connected to the lubricating oil tank to form an oil circulation circuit. The drive component is in transmission connection with the oil pump. The drive component is used to drive the oil pump to operate so as to transport the lubricating oil in the lubricating oil tank to the reducer, thereby cooling the reducer. The heat dissipation assembly also includes a control unit and a temperature sensor. The temperature sensor is connected to the reducer and is used to detect the temperature of the lubricating oil inside the reducer. The control unit is electrically connected to the temperature sensor and the drive assembly respectively; the control unit is used to control the operation of the drive assembly according to the temperature of the lubricating oil detected by the temperature sensor, thereby controlling the operation of the oil pump.

[0006] Furthermore, the drive assembly includes a hydraulic oil tank, a hydraulic pump, a flow control valve and a hydraulic motor connected in sequence, the hydraulic motor is connected to the hydraulic oil tank to form a circulating oil circuit; the hydraulic motor is transmission-connected to the oil delivery pump, and the hydraulic motor is used to drive the oil delivery pump to operate; The control unit is electrically connected to the flow control valve; the control unit is used to control the opening and closing and / or opening degree of the flow control valve according to the temperature of the lubricating oil detected by the temperature sensor.

[0007] Furthermore, the driving assembly includes a driving motor, which is in transmission connection with the oil pump and is used to drive the oil pump to operate; The control unit is electrically connected to the drive motor; the control unit is used to control the operation of the drive motor according to the temperature of the lubricating oil detected by the temperature sensor.

[0008] Furthermore, the oil delivery pump is a gear pump.

[0009] Furthermore, a radiator is provided on the oil circuit between the reducer and the lubricating oil tank.

[0010] Furthermore, a one-way valve is provided on the oil circuit between the oil pump and the reducer.

[0011] Furthermore, a first filtering device is provided on the oil path between the lubricating oil tank and the oil pump; and / or a second filtering device is provided on the oil path between the reducer and the lubricating oil tank.

[0012] Furthermore, the second filtering device includes a return oil filter, a hydraulic one-way valve and a pressure switch. The return oil filter and the hydraulic one-way valve are arranged in parallel. The inlet of the return oil filter and the inlet of the hydraulic one-way valve are both connected to the oil outlet of the reducer, the outlet of the return oil filter and the outlet of the hydraulic one-way valve are both connected to the oil inlet of the lubricating oil tank, and the pressure switch is connected to the inlet of the return oil filter.

[0013] The present invention also provides a power head reducer heat dissipation method based on the power head reducer heat dissipation system as described above, the power head reducer heat dissipation method comprising: Use the temperature sensor to detect the temperature of the lubricating oil inside the reducer; When the temperature of the lubricating oil detected by the temperature sensor is lower than a set value, the control unit controls the driving component to stop operating; When the temperature of the lubricating oil detected by the temperature sensor is greater than or equal to the set value, the control unit controls the drive component to turn on, and controls the speed of the drive component according to the temperature of the lubricating oil detected by the temperature sensor, thereby controlling the speed of the oil pump, and further controlling the flow rate of the lubricating oil delivered by the oil pump to the reducer.

[0014] The present invention also provides an engineering equipment including the power head reducer heat dissipation system as described above.

[0015] The power head reducer heat dissipation system provided by the present invention utilizes a driving component to drive the oil pump to operate. After the oil pump is in operation, it can transport the lubricating oil with a lower temperature in the lubricating oil tank to the reducer, thereby dissipating heat and cooling the reducer. In addition, the circulating lubricating oil can more fully lubricate the gears inside the reducer, thereby improving the lubrication effect inside the reducer. In this way, the working stability of the reducer can be ensured and the service life of the reducer can be extended.

[0016] At the same time, by setting up a control unit and a temperature sensor, the temperature sensor is used to detect the temperature of the lubricating oil inside the reducer, and the operation of the drive component and the oil pump is controlled accordingly, so as to accurately control the circulation flow rate and heat dissipation of the lubricating oil sucked by the oil pump, so that the heat dissipation of the lubricating oil matches the heat generation of the reducer, and then the temperature of the lubricating oil inside the reducer is maintained within an appropriate range, further improving the working stability and service life of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the heat dissipation system of the power head reducer in an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of control logic of a control unit in an embodiment of the present invention.

[0019] Figure 3 This is a structural schematic diagram of the heat dissipation system of the power head reducer in another embodiment of the present invention.

[0020] Figure 4 Schematic diagram of control logic of a control unit in another embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0022] The terms "first," "second," "third," "fourth," and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0023] The terms "up," "down," "left," "right," "front," "back," "top," and "bottom" (if any) used in the specification and claims of this invention are defined by the positions of structures in the accompanying drawings and the positions of structures relative to each other, and are intended solely for clarity and convenience in presenting the technical solution. It should be understood that the use of these terms does not limit the scope of protection claimed in this application.

[0024] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a heat dissipation system for a power head reducer for use in engineering equipment. The heat dissipation system for the power head reducer includes a heat dissipation component 1 and a drive component 2. The heat dissipation component 1 includes a lubricating oil tank 11, an oil pump 12, and a reducer 13 connected in sequence. The reducer 13 is connected to the lubricating oil tank 11 to form a circulating oil circuit. Specifically, the lubricating oil tank 11 is used to store lubricating oil (specifically, gear oil, which is one type of lubricating oil). The oil outlet of the lubricating oil tank 11 is connected to the oil inlet of the oil pump 12 through a pipeline. The oil outlet of the oil pump 12 is connected to the oil inlet of the reducer 13 through a pipeline. The oil outlet of the reducer 13 is connected to the oil inlet of the lubricating oil tank 11 through a pipeline, thereby forming a circulating oil circuit between the lubricating oil tank 11-oil pump 12-reducer 13-lubricating oil tank 11.

[0025] The drive assembly 2 is in transmission connection with the oil pump 12, and the power of the drive assembly 2 during operation can be transmitted to the oil pump 12; the drive assembly 2 is used to drive the oil pump 12 to operate so as to transport the lubricating oil in the lubricating oil tank 11 to the reducer 13, thereby cooling the reducer 13; at the same time, the lubricating oil enters the lubricating oil tank 11 again after flowing through the reducer 13 to dissipate heat and cool down.

[0026] The heat dissipation assembly 1 also includes a control unit 14 and a temperature sensor 131. The temperature sensor 131 is connected to the reducer 13 and is used to detect the temperature of the lubricating oil inside the reducer 13. The control unit 14 is electrically connected to the temperature sensor 131 and the drive assembly 2, respectively. The control unit 14 is used to control the operation of the drive assembly 2 based on the temperature of the lubricating oil detected by the temperature sensor 131, thereby controlling the operation of the oil pump 12, and further controlling whether the oil pump 12 delivers lubricating oil to the reducer 13 and controlling the flow rate of the lubricating oil delivered by the oil pump 12 to the reducer 13. Specifically, the control unit 14 is used to control the start and stop and / or speed of the drive assembly 2 based on the temperature of the lubricating oil detected by the temperature sensor 131, thereby controlling the start and stop and / or speed of the oil pump 12.

[0027] The power head reducer heat dissipation system provided in an embodiment of the present invention utilizes a driving component 2 to drive the oil pump 12 to operate. After the oil pump 12 is in operation, it can transport the lubricating oil with a lower temperature in the lubricating oil tank 11 to the reducer 13, thereby dissipating heat and cooling the reducer 13. Moreover, the circulating lubricating oil can more fully lubricate the gears inside the reducer 13, thereby improving the lubrication effect inside the reducer 13, thereby ensuring the working stability of the reducer and extending the service life of the reducer.

[0028] At the same time, by providing a control unit 14 and a temperature sensor 131, the temperature sensor 131 is used to detect the temperature of the lubricating oil inside the reducer 13, and the operation of the drive assembly 2 and the oil pump 12 is controlled accordingly, thereby accurately controlling the circulation flow rate and heat dissipation of the lubricating oil sucked by the oil pump 12, so that the heat dissipation of the lubricating oil matches the heat generation of the reducer 13, thereby maintaining the temperature of the lubricating oil inside the reducer 13 within an appropriate range, further improving the working stability and service life of the reducer 13. Moreover, under different environmental temperatures in different regions, the power head reducer heat dissipation system can effectively ensure the stability of the internal temperature of the reducer 13.

[0029] Furthermore, in this embodiment, the control unit 14 is a PLC controller (i.e., a programmable logic controller). Of course, in other embodiments, the control unit 14 may also be other control devices.

[0030] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, the drive assembly 2 includes a hydraulic oil tank 21, a hydraulic pump 22, a flow control valve 23, and a hydraulic motor 24, which are connected in sequence. The hydraulic motor 24 is connected to the hydraulic oil tank 21 to form a circulating oil circuit. The hydraulic motor 24 is in transmission connection with the oil transfer pump 12 and is used to drive the oil transfer pump 12. Specifically, the hydraulic oil tank 21 is used to store hydraulic oil. The oil outlet of the hydraulic oil tank 21 is connected to the oil inlet of the hydraulic pump 22 via a pipeline. The oil outlet of the hydraulic pump 22 is connected to the oil inlet of the flow control valve 23 via a pipeline. The oil outlet of the flow control valve 23 is connected to the oil inlet of the hydraulic motor 24 via a pipeline. The oil outlet of the hydraulic motor 24 is connected to the oil inlet of the hydraulic oil tank 21 via a pipeline, thereby forming a circulating oil circuit between the hydraulic oil tank 21, the hydraulic pump 22, the flow control valve 23, the hydraulic motor 24, and the hydraulic oil tank 21. The control unit 14 is electrically connected to the flow control valve 23; the control unit 14 is used to control the opening and closing and / or the opening degree of the flow control valve 23 according to the temperature of the lubricating oil detected by the temperature sensor 131, thereby controlling the starting and closing and / or the speed of the hydraulic motor 24, and further controlling the starting and closing and / or the speed of the oil pump 12.

[0031] Specifically, when the temperature of the lubricating oil detected by the temperature sensor 131 reaches a set value, the control unit 14 controls the flow control valve 23 to open, and at the same time the hydraulic pump 22 runs (the hydraulic pump 22 is driven by an engine or an electric motor). The hydraulic pump 22 absorbs the hydraulic oil in the hydraulic oil tank 21 and pressurizes the hydraulic oil. The pressurized hydraulic oil flows through the flow control valve 23 and enters the hydraulic motor 24, driving the hydraulic motor 24 to rotate, and then the hydraulic oil flows back to the hydraulic oil tank 21; the hydraulic motor 24 is coaxially connected to the oil delivery pump 12. When the hydraulic motor 24 rotates, it drives the oil delivery pump 12 to rotate, so that the oil delivery pump 12 absorbs the lubricating oil in the lubricating oil tank 11 for circulation. At the same time, the control unit 14 controls the opening of the flow control valve 23 according to the temperature of the lubricating oil detected by the temperature sensor 131. The higher the temperature of the lubricating oil detected by the temperature sensor 131, the larger the opening of the flow control valve 23 controlled by the control unit 14, so that the flow rate of the hydraulic oil entering the hydraulic motor 24 is larger, the higher the speed of the hydraulic motor 24 is, and the speed of the oil pump 12 is also higher, thereby increasing the circulation flow rate of the lubricating oil sucked by the oil pump 12 and increasing the heat dissipation; conversely, the lower the temperature of the lubricating oil detected by the temperature sensor 131, the smaller the opening of the flow control valve 23 controlled by the control unit 14, so that the flow rate of the hydraulic oil entering the hydraulic motor 24 is smaller, the speed of the hydraulic motor 24 is lower, and the speed of the oil pump 12 is also lower, thereby decreasing the circulation flow rate of the lubricating oil sucked by the oil pump 12 and decreasing the heat dissipation.

[0032] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, the flow control valve 23 includes a main valve 231 and an electrically controlled pilot proportional pressure reducing valve 232. The electrically controlled pilot proportional pressure reducing valve 232 is connected to the main valve 231. The main valve 231 is disposed in the oil circuit between the hydraulic pump 22 and the hydraulic motor 24. The control unit 14 is electrically connected to the electrically controlled pilot proportional pressure reducing valve 232. When the temperature of the lubricating oil detected by the temperature sensor 131 reaches a set value, the control unit 14 transmits a control current of a certain magnitude to the electrically controlled pilot proportional pressure reducing valve 232. The electrically controlled pilot proportional pressure reducing valve 232 controls the main valve 231 to open, thereby allowing the hydraulic oil output by the hydraulic pump 22 to flow through the main valve 231. At the same time, the control unit 14 transmits different control currents to the electrically controlled pilot proportional pressure reducing valve 232, thereby adjusting the opening degree of the main valve 231 and regulating the flow of hydraulic oil through the main valve 231.

[0033] Specifically, the electrically controlled pilot proportional pressure reducing valve 232 is connected to a pilot oil pipeline (not shown). Pilot oil in the pilot oil pipeline flows into the electrically controlled pilot proportional pressure reducing valve 232 , which then enters the main valve 231 , pushing the valve core of the main valve 231 to move, causing the main valve 231 to open. Simultaneously, upon receiving different control current signals, the electrically controlled pilot proportional pressure reducing valve 232 can output pilot oil of varying pressures to the main valve 231 , thereby controlling the movement of the valve core of the main valve 231 and, consequently, the opening of the main valve 231 to regulate the flow of hydraulic oil through the main valve 231. The structure and operating principles of the electrically controlled pilot proportional pressure reducing valve 232 and the main valve 231 can be found in the prior art and will not be elaborated upon here. Of course, in other embodiments, the flow control valve 23 can also be a valve of other types.

[0034] Furthermore, if Figure 1 As shown, in this embodiment, the flow control valve 23 (main valve 231) is also disposed in the oil circuit between the hydraulic motor 24 and the hydraulic oil tank 21. That is, the flow control valve 23 is disposed simultaneously between the oil outlet of the hydraulic pump 22 and the oil inlet of the hydraulic motor 24, and also between the oil outlet of the hydraulic motor 24 and the oil inlet of the hydraulic oil tank 21. The flow control valve 23 can simultaneously control the oil inflow and oil return of the hydraulic motor 24 (the oil inflow and oil return of the hydraulic motor 24 are generally equal). Of course, the flow control valve 23 can also control only the oil inflow of the hydraulic motor 24, without controlling the oil return of the hydraulic motor 24. Of course, in other embodiments, the flow control valve 23 can also be disposed only between the oil outlet of the hydraulic pump 22 and the oil inlet of the hydraulic motor 24. In this case, the flow control valve 23 only controls the oil inflow of the hydraulic motor 24. All of these approaches can achieve control of the speed of the hydraulic motor 24.

[0035] like Figure 3 and Figure 4 As shown, in another embodiment, the drive assembly 2 includes a drive motor 25, which is in transmission connection with the oil pump 12. Specifically, the drive motor 25 is coaxially connected to the oil pump 12 and is used to drive the oil pump 12. The control unit 14 is electrically connected to the drive motor 25. The control unit 14 is used to control the operation of the drive motor 25 based on the temperature of the lubricating oil detected by the temperature sensor 131, thereby controlling the operation of the oil pump 12. Specifically, the control unit 14 is used to control the start and stop and / or speed of the drive motor 25 based on the temperature of the lubricating oil detected by the temperature sensor 131, thereby controlling the start and stop and / or speed of the oil pump 12.

[0036] Specifically, when the temperature of the lubricating oil detected by the temperature sensor 131 reaches a set value, the control unit 14 controls the drive motor 25 to start, which drives the oil pump 12 to rotate, causing the oil pump 12 to draw lubricating oil from the lubricating oil tank 11 for circulation. Simultaneously, the control unit 14 controls the speed of the drive motor 25 based on the lubricating oil temperature detected by the temperature sensor 131. The higher the lubricating oil temperature detected by the temperature sensor 131, the higher the speed of the drive motor 25 controlled by the control unit 14, and the higher the speed of the oil pump 12, thereby increasing the circulating flow rate of the lubricating oil drawn by the oil pump 12 and dissipating heat. Conversely, the lower the lubricating oil temperature detected by the temperature sensor 131, the lower the speed of the drive motor 25 controlled by the control unit 14, and the lower the speed of the oil pump 12, thereby decreasing the circulating flow rate of the lubricating oil drawn by the oil pump 12 and dissipating heat.

[0037] Of course, in other embodiments, the driving component 2 may also be other driving forms.

[0038] Furthermore, in this embodiment, the oil transfer pump 12 is a gear pump. Gear pumps not only have advantages such as a simple and compact structure, small size, and low cost, but are also insensitive to oil contamination and resistant to impact loads, thus facilitating maintenance and upkeep. Of course, in other embodiments, the oil transfer pump 12 may also be other types of pumps, such as a screw pump or a rotary pump.

[0039] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, a radiator 15 is provided on the oil circuit between the reducer 13 and the lubricating oil tank 11, and the radiator 15 is used to cool the lubricating oil. The temperature of the lubricating oil increases after flowing through the reducer 13. The heated lubricating oil dissipates heat and cools down when passing through the radiator 15, and then flows back to the lubricating oil tank 11. Since the heat dissipation efficiency of the lubricating oil tank 11 itself is relatively low, the radiator 15 is provided to assist in cooling the lubricating oil; in other embodiments, when the heat dissipation efficiency of the lubricating oil tank 11 itself can meet the heat dissipation requirements, the radiator 15 may not be provided. In this embodiment, the radiator 15 is an air-cooled radiator, and the control unit 14 is electrically connected to the radiator 15, and the control unit 14 can control the opening and closing of the radiator 15. Of course, in other embodiments, the control unit 14 may also control the heat dissipation power of the radiator 15 according to the temperature of the lubricating oil detected by the temperature sensor 131; for example, the higher the temperature of the lubricating oil detected by the temperature sensor 131, the greater the heat dissipation power of the radiator 15 controlled by the control unit 14, and conversely, the lower the temperature of the lubricating oil detected by the temperature sensor 131, the smaller the heat dissipation power of the radiator 15 controlled by the control unit 14.

[0040] Furthermore, if Figure 1As shown, in this embodiment, a one-way valve 16 is provided on the oil circuit between the oil pump 12 and the reducer 13. The inlet of the one-way valve 16 is connected to the oil outlet of the oil pump 12, and the outlet of the one-way valve 16 is connected to the oil inlet of the reducer 13, so that the lubricating oil can only flow from the oil pump 12 to the reducer 13 in one direction, and cannot flow in the opposite direction.

[0041] Furthermore, if Figure 1 As shown, in this embodiment, a first filter device 17 is provided in the oil line between the lubricating oil tank 11 and the oil pump 12. The first filter device 17 is used to filter the lubricating oil to prevent impurities in the lubricating oil from entering the reducer 13 and affecting the normal operation of the reducer 13. In this embodiment, the first filter device 17 includes an oil suction filter element, which is used to filter the lubricating oil and is disposed within the lubricating oil tank 11. Of course, in other embodiments, the first filter device 17 can also be disposed outside the lubricating oil tank 11.

[0042] Furthermore, if Figure 1 As shown, in this embodiment, a second filter device 18 is provided in the oil line between the reducer 13 and the lubricating oil tank 11. The second filter device 18 is used to filter the lubricating oil so that impurities in the reducer 13 can be intercepted and filtered by the second filter device 18 after flowing out with the lubricating oil. In this embodiment, the second filter device 18 has filter element clogging protection and alarm functions. The second filtering device 18 includes a return oil filter 181, a hydraulic one-way valve 182 and a pressure switch 183. The return oil filter 181 includes a return oil filter element. The return oil filter 181 and the hydraulic one-way valve 182 are arranged in parallel. The inlet of the return oil filter 181 and the inlet of the hydraulic one-way valve 182 are both connected to the oil outlet of the reducer 13, and the outlet of the return oil filter 181 and the outlet of the hydraulic one-way valve 182 are both connected to the oil inlet of the lubricating oil tank 11. The pressure switch 183 is connected to the inlet of the return oil filter 181; when the return oil filter element in the return oil filter 181 is clogged, the pressure at the inlet end of the return oil filter 181 increases, the hydraulic one-way valve 182 opens, and the lubricating oil flows to the lubricating oil tank 11 through the hydraulic one-way valve 182 to avoid oil circuit blockage and affect normal operation. At the same time, the pressure switch 183 sends an alarm signal, prompting to replace the filter element.

[0043] Furthermore, if Figure 1 As shown, in this embodiment, the radiator 15 is disposed in the oil path between the second filter device 18 and the lubricating oil tank 11. That is, the lubricating oil flowing out of the reducer 13 must first be filtered by the second filter device 18 before entering the radiator 15 for cooling. This prevents impurities in the lubricating oil from accumulating in the radiator 15 and causing blockage and damage to the radiator 15. Of course, in other embodiments, the second filter device 18 may also be disposed in the oil path between the radiator 15 and the lubricating oil tank 11.

[0044] An embodiment of the present invention further provides a power head reducer heat dissipation method based on the power head reducer heat dissipation system described above, the power head reducer heat dissipation method comprising: The temperature of the lubricating oil inside the reducer 13 is detected by the temperature sensor 131; When the temperature of the lubricating oil detected by the temperature sensor 131 is lower than the set value, the control unit 14 controls the driving component 2 to stop running, and the heat dissipation component 1 also stops working; When the temperature of the lubricating oil detected by the temperature sensor 131 is greater than or equal to a set value, the control unit 14 controls the drive assembly 2 to turn on, and controls the speed of the drive assembly 2 according to the temperature of the lubricating oil detected by the temperature sensor 131, thereby controlling the speed of the oil pump 12, and further controlling the flow rate of the lubricating oil delivered by the oil pump 12 to the reducer 13. Specifically, the higher the temperature of the lubricating oil detected by the temperature sensor 131, the higher the speed of the drive assembly 2 controlled by the control unit 14, and the higher the speed of the oil pump 12, thereby increasing the flow rate of the lubricating oil delivered by the oil pump 12 to the reducer 13 and increasing the heat dissipation of the reducer 13; the lower the temperature of the lubricating oil detected by the temperature sensor 131, the lower the speed of the drive assembly 2 controlled by the control unit 14, and the lower the speed of the oil pump 12, thereby decreasing the flow rate of the lubricating oil delivered by the oil pump 12 to the reducer 13 and decreasing the heat dissipation of the reducer 13.

[0045] The set value may be set according to the normal working temperature of the lubricating oil, for example, 70°C to 100°C.

[0046] The embodiment of the present invention further provides an engineering equipment including the above-mentioned power head reducer heat dissipation system. The engineering equipment includes but is not limited to a rotary drilling rig.

[0047] Furthermore, in this embodiment, the engineering equipment also includes a main hydraulic motor (not shown) and a power unit (not shown). The input end of the reducer 13 is in transmission connection with the main hydraulic motor, and the output end of the reducer 13 is in transmission connection with the power unit. During operation, the main hydraulic motor drives the power unit through the reducer 13 to rotate. The engineering equipment also includes a main hydraulic pump (not shown). The oil inlet of the main hydraulic pump is connected to the oil outlet of the hydraulic oil tank 21. The oil outlet of the main hydraulic pump is connected to the oil inlet of the main hydraulic motor. The oil outlet of the main hydraulic motor is connected to the oil inlet of the hydraulic oil tank 21, forming an oil circulation circuit. The main hydraulic pump is used to pressurize the hydraulic oil to drive the main hydraulic motor. In this embodiment, the lubricating oil tank 11 in the heat dissipation assembly 1 and the hydraulic oil tank 21 in the drive assembly 2 are existing components of the engineering equipment, while the hydraulic motor 24 in the drive assembly 2 is an additional component. In addition to providing power to the hydraulic motor 24, the hydraulic pump 22 in the drive assembly 2 can also provide hydraulic power to other hydraulic components of the engineering equipment (such as the outrigger cylinders). In this embodiment, the power and size of the hydraulic motor 24 are smaller than those of the main hydraulic motor.

[0048] When the engineering equipment is a rotary drilling rig, when the rotary drilling rig is in a deep mixing pile working condition, the rotation speed of the power head is relatively high. Specifically, deep mixing piles are a soft soil foundation reinforcement technology. Deep mixing piles are drilled into the foundation by a drilling rig, and the cement slurry or other chemicals are forcibly mixed with the soil by deep mixing, which changes the properties of the soil and forms a single strong and stable pile body, thereby improving the bearing capacity. Under the deep mixing pile working condition, the rotation speed of the power head is relatively high, and it needs to work continuously for a long time, so that the workload of the reducer 13 is relatively large and the heat generated is relatively large; and the current rotary drilling rigs are generally not equipped with a heat dissipation system for the reducer, which makes the reducer prone to overheating, which not only affects the normal operation of the reducer, but also reduces the service life of the reducer. The present application sets a heat dissipation system for the power head reducer, which can effectively dissipate heat and cool the reducer 13, so that the reducer 13 can be well applied to the deep mixing pile working condition, and ensure the working stability of the reducer 13, and extend the service life of the reducer 13.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A heat dissipation system for a power head reducer, characterized in that: The invention comprises a heat dissipation component (1) and a driving component (2), wherein the heat dissipation component (1) comprises a lubricating oil tank (11), an oil delivery pump (12) and a reducer (13) which are connected in sequence, and the reducer (13) is connected to the lubricating oil tank (11) to form a circulating oil circuit; the driving component (2) is connected to the oil delivery pump (12) in a transmission manner, and the driving component (2) is used to drive the oil delivery pump (12) to operate so as to deliver the lubricating oil in the lubricating oil tank (11) to the reducer (13), thereby cooling the reducer (13); The heat dissipation assembly (1) further comprises a control unit (14) and a temperature sensor (131), wherein the temperature sensor (131) is connected to the reducer (13), and the temperature sensor (131) is used to detect the temperature of the lubricating oil inside the reducer (13). The control unit (14) is respectively connected to the temperature sensor (131) and the drive assembly (2) via electrical signals; the control unit (14) is used to control the operation of the drive assembly (2) according to the temperature of the lubricating oil detected by the temperature sensor (131), thereby controlling the operation of the oil pump (12).

2. The heat dissipation system of the power head reducer according to claim 1, characterized in that: The driving assembly (2) includes a hydraulic oil tank (21), a hydraulic pump (22), a flow control valve (23), and a hydraulic motor (24) connected in sequence. The hydraulic motor (24) is connected to the hydraulic oil tank (21) to form a circulating oil circuit. The hydraulic motor (24) is in transmission connection with the oil delivery pump (12). The hydraulic motor (24) is used to drive the oil delivery pump (12) to operate. The control unit (14) is electrically connected to the flow control valve (23); the control unit (14) is used to control the opening and closing and / or opening degree of the flow control valve (23) according to the temperature of the lubricating oil detected by the temperature sensor (131).

3. The heat dissipation system of the power head reducer according to claim 1, characterized in that: The driving assembly (2) includes a driving motor (25), the driving motor (25) is in driving connection with the oil delivery pump (12), and the driving motor (25) is used to drive the oil delivery pump (12) to operate; The control unit (14) is electrically connected to the drive motor (25); the control unit (14) is used to control the operation of the drive motor (25) according to the temperature of the lubricating oil detected by the temperature sensor (131).

4. The heat dissipation system for the power head reducer according to claim 1, characterized in that: The oil delivery pump (12) is a gear pump.

5. The heat dissipation system for the power head reducer according to claim 1, characterized in that: A radiator (15) is provided on the oil circuit between the reducer (13) and the lubricating oil tank (11).

6. The heat dissipation system for the power head reducer according to claim 1, characterized in that: A one-way valve (16) is provided on the oil line between the oil delivery pump (12) and the reducer (13).

7. The heat dissipation system for a power head reducer according to any one of claims 1 to 6, characterized in that: A first filter device (17) is provided on the oil line between the lubricating oil tank (11) and the oil pump (12); and / or a second filter device (18) is provided on the oil line between the reducer (13) and the lubricating oil tank (11).

8. The heat dissipation system for the power head reducer according to claim 7, characterized in that: The second filtering device (18) includes a return oil filter (181), a hydraulic one-way valve (182) and a pressure switch (183). The return oil filter (181) and the hydraulic one-way valve (182) are arranged in parallel. The inlet of the return oil filter (181) and the inlet of the hydraulic one-way valve (182) are both connected to the oil outlet of the reducer (13). The outlet of the return oil filter (181) and the outlet of the hydraulic one-way valve (182) are both connected to the oil inlet of the lubricating oil tank (11). The pressure switch (183) is connected to the inlet of the return oil filter (181).

9. A method for heat dissipation of a power head reducer based on the heat dissipation system of a power head reducer according to any one of claims 1 to 8, characterized in that: The heat dissipation method of the power head reducer includes: Detecting the temperature of the lubricating oil inside the reducer (13) using a temperature sensor (131); When the temperature of the lubricating oil detected by the temperature sensor (131) is lower than a set value, the control unit (14) controls the driving component (2) to stop operating; When the temperature of the lubricating oil detected by the temperature sensor (131) is greater than or equal to the set value, the control unit (14) controls the drive component (2) to start, and controls the rotation speed of the drive component (2) according to the temperature of the lubricating oil detected by the temperature sensor (131), thereby controlling the rotation speed of the oil delivery pump (12), and further controlling the flow rate of the lubricating oil delivered by the oil delivery pump (12) to the reducer (13).

10. An engineering equipment, characterized in that: It comprises the power head reducer heat dissipation system according to any one of claims 1 to 8.

Images