Dual-power excavator electric control device water-cooled motor heat dissipation system and excavator

Abstract

The invention discloses a dual-power excavator electric control device water-cooled motor heat dissipation system and an excavator. The heat dissipation system comprises a water-cooled motor, a water-cooled rectification electric control system and a radiator, and the radiator is provided with a first liquid inlet, a second liquid inlet, a first liquid outlet and a second liquid outlet; a water cooling motor and a water pump I are connected in series between the first liquid inlet and the first liquid outlet; and a water-cooling rectification electric control system and a water pump II are connected in series between the second liquid inlet and the second liquid outlet. By adopting the water-cooled motor heat dissipation system of the electric control device of the dual-power excavator, the problems of insufficient heat dissipation of a permanent magnet synchronous water-cooled motor and high temperature of the permanent magnet synchronous water-cooled motor can be effectively solved; and the problem of high temperature caused by unsmooth heat dissipation of the water-cooling rectification electric control system can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, in particular to a water-cooled motor heat dissipation system of an electric control device of a dual-power excavator and an excavator. Background Art

[0002] With the gradual increase of environmental protection policies, the state has imposed mandatory restrictions on the production, sales, use and emissions of fuel-powered construction machinery. Especially under the pressure of upgraded construction machinery emissions, the electrification of construction machinery will become a very important direction, which is a direct promotion for the development of new energy vehicles. In addition, the lack of oil and gas resources and the serious air pollution are also the rigid demand and driving force for China to develop new energy products.

[0003] The market demand for green and energy-saving electric excavators is growing rapidly, but the existing plug-in electric excavators cannot meet the requirements of frequent transfer of excavators. Dual-power excavators that can flexibly switch between fuel and electric motors can meet the needs of tunnel operations, dock loading operations, mobile transfers and other operations without being restricted by power sources.

[0004] Existing dual-power excavator motors are generally equipped with asynchronous air-cooled motors, but they are too large, have large starting currents, and poor speed regulation performance; or they are equipped with synchronous water-cooled motors, but their motors, controllers, and rectifiers are connected in series to the cooling system, which often causes high motor temperatures or high controller and rectifier temperatures, causing the excavator to often shut down.

[0005] Publication No.: CN114132169A, discloses a working vehicle and a thermal management system thereof, including a cooling circuit, a first circuit and a second circuit, the first circuit including a motor module, the first circuit and the cooling circuit are arranged side by side so that the cooling circuit is used to cool the motor module; the second circuit includes a battery module, a first reversing valve and a second reversing valve; the battery module is connected to the cooling circuit through the first reversing valve and the second reversing valve respectively, so that the cooling circuit cools the battery module; the battery module is connected to the first circuit through the first reversing valve and the second reversing valve respectively, so that the first circuit heats the battery module.

[0006] The prior art has the problem that after the controller heats the cooling water, the high-temperature cooling water cannot effectively cool down the motor, and the motor shuts down due to high temperature.

[0007] Announcement No.: CN213108976U, discloses a hybrid hydraulic excavator cooling system and a hybrid hydraulic excavator, including a heat dissipation device, a conveying device and a plurality of first cooling branches, the plurality of first cooling branches are connected in parallel; a first device to be cooled and a first controller matched with the first device to be cooled are connected in series on the first cooling branch; the conveying device is connected to the heat dissipation device, and the conveying device is used to drive the cooling medium through the heat dissipation device and each first cooling branch.

[0008] The prior art has the problem that after the controller heats the cooling water, the high-temperature cooling water cannot effectively cool down the motor, and the motor shuts down due to high temperature.

[0009] Announcement No.: CN218648696U, discloses a heat dissipation system and an operating machine, including a radiator for cooling the coolant; a water pump, whose liquid inlet is connected to the liquid outlet of the radiator; a component to be cooled, including a controller and a motor, the controller and the motor are arranged in series between the liquid outlet of the water pump and the liquid inlet of the radiator through a pipeline; a filtering device, which is arranged between the liquid outlet of the radiator and the liquid inlet of the water pump.

[0010] The prior art has the problem that after the controller heats the cooling water, the high-temperature cooling water cannot effectively cool down the motor, and the motor shuts down due to high temperature.

[0011] In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the beneficial effects produced are all different from the present invention. Regarding more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the invention

[0012] In view of the above-mentioned defects in the prior art, an object of the present invention is to provide a water-cooled motor heat dissipation system for an electronic control device of a dual-power excavator and an excavator.

[0013] In order to achieve the above object, the present invention adopts the following technical solutions:

[0014] On the one hand, the present invention provides a water-cooled motor heat dissipation system for an electronic control device of a dual-power excavator, including a water-cooled motor, a water-cooled rectifier electronic control system, and a radiator. The radiator is provided with a first liquid inlet, a second liquid inlet, a first liquid outlet, and a second liquid outlet; the water-cooled motor and a water pump 1 are connected in series between the first liquid inlet and the first liquid outlet; the water-cooled rectifier electronic control system and a water pump 2 are connected in series between the second liquid inlet and the second liquid outlet.

[0015] Furthermore, the first liquid outlet of the radiator is connected to the liquid inlet of water pump one through a water inlet pipe of water pump one, the liquid outlet of water pump one is connected to the liquid inlet of the water-cooled motor through a motor water inlet pipe, and the liquid outlet of the water-cooled motor is connected to the first liquid inlet of the radiator through the motor water outlet pipe.

[0016] Furthermore, the water-cooled rectifier electric control system comprises a water-cooled rectifier 1, a water-cooled rectifier 2, and a water-cooled controller;

[0017] Specifically, the second liquid outlet of the radiator is connected to the liquid inlet of water pump 2 through the water inlet pipe of water pump 2, the liquid outlet of water pump 2 is connected to the liquid inlet of water-cooled rectifier 1 through the water inlet pipe of rectifier 1, the liquid outlet of water-cooled rectifier 1 is connected to the liquid inlet of water-cooled rectifier 2 through the water outlet pipe of rectifier 1, the liquid outlet of water-cooled rectifier 2 is connected to the liquid inlet of water-cooled controller through the water inlet pipe of controller, and the liquid outlet of water-cooled controller is connected to the second liquid inlet of the radiator through the water outlet pipe of controller.

[0018] Furthermore, the radiator is an air-cooled radiator, comprising a fan and a return bend pipe with cooling fins, wherein the fan faces the return bend pipe;

[0019] Specifically, the liquid inlet of the return bend pipe is connected to a tee through a sealing pipe thread to separate a first liquid inlet and a second liquid inlet, and the liquid outlet of the return bend pipe is connected to a tee through a sealing pipe thread to separate a first liquid outlet and a second liquid outlet.

[0020] Furthermore, it also includes an auxiliary water tank, the liquid inlet of which is connected to the overflow port of the radiator through a water supply pipe, the liquid outlet of the auxiliary water tank is connected to the overflow water pipe, the other end of the overflow water pipe is open downward, and the overflow port of the radiator is opened at the high point of the bend.

[0021] Furthermore, the water-cooled motor is located on the left / right side of the radiator, and the water-cooled rectifier electronic control system is located on the right / left side of the radiator.

[0022] In a second aspect, the present invention provides an excavator, comprising the water-cooled motor heat dissipation system of the electronic control device of the dual-power excavator described in the first aspect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The water-cooled motor heat dissipation system of the dual-power excavator electronic control device of the present invention can effectively solve the problem of insufficient heat dissipation of the permanent magnet synchronous water-cooled motor and the high temperature problem of the permanent magnet synchronous water-cooled motor.

[0025] 2. The water-cooled motor heat dissipation system of the dual-power excavator electronic control device of the present invention can effectively solve the problem of high temperature of the controller and rectifier due to poor heat dissipation, which causes shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic structural diagram of a water-cooled motor heat dissipation system of an electronic control device of a dual-power excavator.

[0027] In the figure: 1. Radiator; 2. Water pump 1 water inlet pipe; 3. Water pump 1; 4. Motor water inlet pipe; 5. Motor water outlet pipe; 6. Water supply pipe; 7. Water pump 2 water inlet pipe; 8. Rectifier 1 water inlet pipe; 9. Rectifier 1 water outlet pipe; 10. Controller water inlet pipe; 11. Controller water outlet pipe; 12. Auxiliary water tank; 13. Auxiliary water tank bracket; 14. First throat clamp; 15. Second throat clamp; 16. Third throat clamp; 17. First pipe clamp; 18. Second pipe clamp; 19. Bolt M6×35; 20 , washer 6; 21, bolt M12×40; 22, washer 12; 23, bolt M6×50; 24, bolt M12×25; 25, bolt M12×35; 26, bolt M12×30; 27, pull rod one; 28, pull rod two; 29, overflow water pipe; 30, fixing plate one; 31, fixing plate two; 32, water pump two; 33, radiator mounting plate; 34, water-cooled motor; 35, water-cooled rectifier one; 36, water-cooled rectifier two; 37, water-cooled controller. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1 The present invention provides a water-cooled motor heat dissipation system for an electronic control device of a dual-power excavator, comprising a water-cooled motor 34, a water-cooled rectifier electronic control system, and a radiator 1. The radiator 1 is provided with a first liquid inlet, a second liquid inlet, a first liquid outlet, and a second liquid outlet. The water-cooled motor 34 and a water pump 1 3 are connected in series between the first liquid inlet and the first liquid outlet, and the water-cooled rectifier electronic control system and a water pump 2 32 are connected in series between the second liquid inlet and the second liquid outlet.

[0031] Specifically, the first liquid outlet of the radiator 1 is connected to the liquid inlet of the water pump 3 through a water pump inlet pipe 2, the liquid outlet of the water pump 3 is connected to the liquid inlet of the water-cooled motor 34 through a motor water inlet pipe 4, and the liquid outlet of the water-cooled motor 34 is connected to the first liquid inlet of the radiator 1 through a motor water outlet pipe 5.

[0032] Specifically, two ends of the water pump first water inlet pipe 2, two ends of the motor water inlet pipe 4, and two ends of the motor water outlet pipe 5 are connected to the corresponding liquid inlet or liquid outlet through the first throat clamp 14.

[0033] Specifically, the water-cooled rectifier electronic control system includes a water-cooled rectifier 1 35, a water-cooled rectifier 2 36, and a water-cooled controller 37. The second liquid outlet of the radiator 1 is connected to the liquid inlet of the water pump 2 32 through the water pump 2 water inlet pipe 7, the liquid outlet of the water pump 2 32 is connected to the liquid inlet of the water-cooled rectifier 1 35 through the rectifier 1 water inlet pipe 8, the liquid outlet of the water-cooled rectifier 1 35 is connected to the liquid inlet of the water-cooled rectifier 2 36 through the rectifier 1 water outlet pipe 9, the liquid outlet of the water-cooled rectifier 2 36 is connected to the liquid inlet of the water-cooled controller 37 through the controller water inlet pipe 10, and the liquid outlet of the water-cooled controller 37 is connected to the second liquid inlet of the radiator 1 through the controller water outlet pipe 11.

[0034] Among them, the water-cooled rectifier 1 35 is used to provide direct current to the water-cooled motor 34, and the water-cooled rectifier 2 36 is used to provide direct current to the water-cooled controller 37. The water-cooled controller 37 controls the operation of the water-cooled motor 34. In the dual-power excavator, the generator is used to provide alternating current to the water-cooled rectifier 1 35 and the water-cooled rectifier 2 36.

[0035] Specifically, the two ends of the water pump second water inlet pipe 7, the two ends of the rectifier first water inlet pipe 8, the two ends of the rectifier first water outlet pipe 9, the two ends of the controller water inlet pipe 10, and the two ends of the controller water outlet pipe 11 are connected to the corresponding liquid inlet or outlet through the second throat clamp 15.

[0036] Specifically, the radiator is an air-cooled radiator, including a fan and a return bend pipe with cooling fins. The fan faces the return bend pipe. The liquid inlet of the return bend pipe is connected to a tee through a sealing pipe thread to separate a first liquid inlet and a second liquid inlet. The liquid outlet of the return bend pipe is connected to a tee through a sealing pipe thread to separate a first liquid outlet and a second liquid outlet.

[0037] It also includes an auxiliary water tank 12, the liquid inlet of the auxiliary water tank 12 is connected to the overflow port of the radiator 1 through a water supply pipe 6, the liquid outlet of the auxiliary water tank 12 is connected to an overflow water pipe 29, and the other end of the overflow water pipe 29 is open and faces downward; the liquid inlet of the auxiliary water tank 12 is provided with a double channel, and a pressure valve and a vacuum valve are respectively provided in the two channels; during operation, the coolant expands due to heat, and the pressure in the radiator 1 also increases accordingly. When the pressure reaches the opening pressure of the water tank cover pressure valve, the pressure valve opens, and the coolant flows into the auxiliary water tank 12; when the coolant contracts and the vacuum degree in the radiator reaches the opening pressure of the vacuum valve, the vacuum valve opens, and the coolant flows back to the radiator 1.

[0038] Specifically, the overflow port is opened at the high point of the elbow of the radiator 1 to facilitate the discharge of gas.

[0039] Specifically, both ends of the water supply pipe 6 are connected to the corresponding liquid inlet and overflow port through the third throat clamp 16 , and the overflow water pipe 29 is connected to the liquid outlet of the auxiliary water tank 12 through the third throat clamp 16 .

[0040] Specifically, the water supply pipe 6 is fixed to the radiator 1 through the first pipe clamp 17, and the controller water inlet pipe 10 is fixed to the base of the water-cooled rectifier 35 through the second pipe clamp 18.

[0041] Furthermore, the water-cooled motor 1 is located on the left / right side of the radiator 1 , and the water-cooled rectifier electronic control system is located on the right / left side of the radiator 1 .

[0042] Specifically, the water-cooled motor 34 is a permanent magnet synchronous water-cooled motor, and the water pump 1 3 and the water pump 2 32 are large-flow brushless water pumps.

[0043] It should be noted that the water-cooled motor 34 , the water-cooled rectifier, and the water-cooled controller are prior arts, and those skilled in the art are clear about their structures.

[0044] Embodiment 2:

[0045] On the basis of Example 1, a water-cooled motor heat dissipation system of an electronic control device of a dual-power excavator is applied to a dual-power excavator. A fixing plate 1 30, a fixing plate 2 31, a radiator mounting plate 33, and an auxiliary water tank bracket 13 are arranged in the motor compartment of the excavator. The water pump 1 3 is connected to the fixing plate 1 30 by a bolt M6×5023, and the water pump 2 32 is connected to the fixing plate 2 31 by a bolt M6×35 19 and a washer 6 20. The bottom of the radiator 1 is fixed to the radiator mounting plate 33 by a bolt M12×4021 and a washer 1222, and the auxiliary water tank 12 is fixed to the auxiliary water tank bracket 13 by a washer 12 22 and a bolt M12×25 24.

[0046] One side wall of the radiator 1 is connected to the excavator side beam through a tie rod 27, one end of the tie rod 27 is connected to the radiator 1 with a bolt M12×3026, and the other end is connected to the excavator side beam with a bolt M12×40 21. The other side wall of the radiator 1 is connected to the excavator side beam through a tie rod 28, one end of the tie rod 28 is connected to the radiator 1 with a bolt M12×3026, and the other end is connected to the excavator side beam with a bolt M12×35 25.

[0047] It should be noted that the dual-power excavator itself belongs to the prior art, and the structure of the dual-power excavator, the installation method of the water-cooled motor 34, the water-cooled rectifier 1 35, the water-cooled rectifier 2 36, the water-cooled controller 37, the generator and the electrical connection relationship therebetween are clear to those skilled in the art.

[0048] The contribution of the present invention lies in that the water-cooled motor 34 and the water-cooled rectifier electronic control system are connected in parallel to the two sides of the radiator 1, and the two sides of the radiator 1 are respectively equipped with a large-flow brushless water pump 1 3 and a water pump 2 32. The water-cooled motor 34 and the water-cooled rectifier electronic control system are respectively connected to the outlet and inlet ends of the radiator 1 to form two independent heat dissipation circulation systems, which effectively solves the problem of insufficient heat dissipation of the motor, resulting in high temperature of the motor, and effectively solves the problem of insufficient heat dissipation of the rectifier and controller, resulting in high temperature of the rectifier and controller.

[0049] All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

[0050] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0051] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0052] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-cooled motor heat dissipation system for an electric control device of a dual-power excavator, comprising a water-cooled motor, a water-cooled rectifier electric control system, and a radiator, characterized in that: The radiator is provided with a first liquid inlet, a second liquid inlet, a first liquid outlet, and a second liquid outlet; A water-cooled motor and a water pump 1 are connected in series between the first liquid inlet and the first liquid outlet; A water-cooling rectifier electronic control system and a second water pump are connected in series between the second liquid inlet and the second liquid outlet.

2. A water-cooled motor heat dissipation system for an electronic control device of a dual-power excavator according to claim 1, characterized in that: The first liquid outlet of the radiator is connected to the liquid inlet of water pump one through a water inlet pipe of water pump one, the liquid outlet of water pump one is connected to the liquid inlet of the water-cooled motor through the motor water inlet pipe, and the liquid outlet of the water-cooled motor is connected to the first liquid inlet of the radiator through the motor water outlet pipe.

3. The water-cooled motor heat dissipation system of the dual-power excavator electronic control device according to claim 1 is characterized in that: The water-cooled rectifier electric control system comprises a water-cooled rectifier 1, a water-cooled rectifier 2, and a water-cooled controller; The second liquid outlet of the radiator is connected to the liquid inlet of water pump 2 through the water inlet pipe of water pump 2, the liquid outlet of water pump 2 is connected to the liquid inlet of water-cooled rectifier 1 through the water inlet pipe of rectifier 1, the liquid outlet of water-cooled rectifier 1 is connected to the liquid inlet of water-cooled rectifier 2 through the water outlet pipe of rectifier 1, the liquid outlet of water-cooled rectifier 2 is connected to the liquid inlet of water-cooled controller through the water inlet pipe of controller, and the liquid outlet of water-cooled controller is connected to the second liquid inlet of the radiator through the water outlet pipe of controller.

4. The water-cooled motor heat dissipation system of the dual-power excavator electronic control device according to claim 1 is characterized in that: The radiator is an air-cooled radiator, comprising a fan and a return bend pipe with cooling fins, wherein the fan faces the return bend pipe; The liquid inlet of the return bend pipe is connected to a tee through a sealing pipe thread to separate a first liquid inlet and a second liquid inlet, and the liquid outlet of the return bend pipe is connected to a tee through a sealing pipe thread to separate a first liquid outlet and a second liquid outlet.

5. The water-cooled motor heat dissipation system of the electronic control device of a dual-power excavator according to claim 4 is characterized in that: It also includes an auxiliary water tank, the liquid inlet of which is connected to the overflow port of the radiator through a water supply pipe, the liquid outlet of the auxiliary water tank is connected to the overflow water pipe, the other end of the overflow water pipe is open downward, and the overflow port of the radiator is opened at the high point of the elbow.

6. The water-cooled motor heat dissipation system of the electronic control device of a dual-power excavator according to claim 1 is characterized in that: The water-cooled motor is located on the left / right side of the radiator, and the water-cooled rectifier electronic control system is located on the right / left side of the radiator.

7. An excavator, characterized in that: A water-cooled motor heat dissipation system for an electronic control device of a dual-power excavator comprising the method described in any one of claims 1-6.

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