Engineering machinery petrol pump device and heat dissipation device thereof

Abstract

The utility model discloses an engineering machinery petrol pump device and a heat dissipation device thereof, and belongs to the technical field of engineering machinery. The utility model relates to a petrol pump device for engineering machinery, which comprises a motor and a petrol pump, and an output shaft of the motor is fixedly connected with the petrol pump. The engineering machinery refueling pump device further comprises an oil suction pipeline, a heat dissipation sleeve and a second oil outlet, a heat dissipation cavity is formed in the heat dissipation sleeve, the second oil outlet is formed in the heat dissipation sleeve, one end of the oil suction pipeline is fixedly connected with the first oil outlet, and the other end of the oil suction pipeline is communicated with the heat dissipation cavity of the heat dissipation sleeve. The heat dissipation sleeve is arranged on the motor shell in a sleeving mode so that oil sucked into the heat dissipation cavity from the oil suction pipeline can flow in the heat dissipation cavity to exchange heat with the motor shell. The main purpose of the utility model is that the oil pumped by the petrol pump itself is used as the cooling medium of the motor to take away the heat generated by the working of the motor, thereby reducing the heat accumulation generated by the coil in the working process, and achieving a good heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and more specifically, to an engineering machinery refueling pump device and its heat dissipation device. Background Technology

[0002] Electric fuel pumps are widely used for refueling various oils, such as fuel oil, hydraulic oil, and lubricating oil, in construction machinery. They are indispensable tools for the normal operation, maintenance, and repair of equipment, significantly reducing the labor intensity of operators and improving work efficiency. Common electric fuel pumps are typically driven directly by a regular electric motor to complete the fuel refueling operation.

[0003] In existing technologies, ordinary electric fuel pumps are limited by the heat dissipation capacity of the electric motor, making them unable to operate under high loads for extended periods. This also leads to issues such as motor overheating, reduced efficiency, and even motor burnout. Currently, high-efficiency, full-time motors or forced short-term intermittent operation are commonly used to avoid these problems. However, both of these methods result in excessively high electric motor costs, failing to fully meet the operational needs of engineering machinery and reducing the efficiency and economy of the equipment.

[0004] How to achieve good heat dissipation without changing the structural layout of a regular electric fuel pump is an urgent problem to be solved. Utility Model Content

[0005] 1. Technical problem to be solved by the utility model

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a fuel pump device for engineering machinery. It uses the oil pumped by the pump itself as a cooling medium for the electric motor, which removes the heat generated by the motor and reduces the heat accumulation of the coil during operation. It does not change the structural layout of the ordinary electric fuel pump and does not require additional heat dissipation equipment to achieve good heat dissipation.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model discloses a fuel pump device for engineering machinery. The fuel pump device includes a motor and a fuel pump. The output shaft of the motor is fixedly connected to the fuel pump. The fuel pump includes a first oil suction port and a first oil outlet. The fuel pump device also includes an oil suction pipe, a heat dissipation sleeve, and a second oil outlet. The heat dissipation sleeve has a heat dissipation chamber and a second oil outlet. One end of the oil suction pipe is fixedly connected to the first oil outlet, and the other end of the oil suction pipe communicates with the heat dissipation chamber of the heat dissipation sleeve. The heat dissipation sleeve is fitted onto the motor housing so that the oil sucked into the heat dissipation chamber from the oil suction pipe flows in the heat dissipation chamber and exchanges heat with the motor housing.

[0010] As a further improvement of this utility model, the heat dissipation sleeve includes an inner liner, an outer shell, and a sealing ring. The inner liner, the outer shell, and the sealing ring together constitute the external shape of the heat dissipation sleeve, and the gap between the inner liner and the outer shell constitutes the heat dissipation chamber.

[0011] As a further improvement of this utility model, the inner lining is a "C" shaped clamp, the outer shell is a "C" shaped thin plate, and the outer shell and the inner lining are concentrically arranged.

[0012] As a further improvement of this utility model, the liner is also provided with fasteners, which are located at the "C"-shaped clamp opening of the liner.

[0013] As a further improvement of this utility model, the fastener includes two fastening plates and a fastening connector. The two fastening plates are respectively fixedly connected to the opening of the inner liner, and the fastening connector is disposed on the fastening plate for fastening the inner liner to the motor housing.

[0014] As a further improvement of this utility model, two fastening connectors are provided, and the distances of the two fastening connectors to the two sides of the fastening plate are equal.

[0015] As a further improvement of this utility model, the distance from any point on the inner surface of the outer shell to a point on the outer surface of its nearest inner lining is equal.

[0016] As a further improvement of this utility model, the outer shell is provided with a first oil suction port that communicates with the heat dissipation chamber, and the end of the oil suction pipe away from the first oil outlet is connected to the first oil suction port.

[0017] As a further improvement of this utility model, a flexible heat-conducting paper is provided between the liner and the motor.

[0018] In another aspect of this utility model, a heat dissipation device is used in the aforementioned engineering machinery refueling pump device. The engineering machinery refueling pump device includes a motor and a refueling pump. The heat dissipation device includes an oil suction pipe, a heat dissipation sleeve, and a second oil outlet. The heat dissipation sleeve has a heat dissipation chamber inside and a second oil outlet is provided on the heat dissipation sleeve. One end of the oil suction pipe is fixedly connected to the first oil outlet, and the other end of the oil suction pipe is connected to the heat dissipation chamber of the heat dissipation sleeve. The heat dissipation sleeve can be fitted onto the motor housing so that the oil sucked into the heat dissipation chamber from the oil suction pipe flows in the heat dissipation chamber and exchanges heat with the motor housing.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0021] This invention provides a fuel pump device for engineering machinery. Without altering the structural layout of a conventional electric fuel pump, it utilizes the fuel pumped by the pump as a cooling medium, achieving excellent heat dissipation without the need for additional cooling equipment. This allows for long-term, high-load, and high-efficiency fuel dispensing operations using a conventional, intermittently operating electric motor. It also extends the lifespan of the electric fuel pump, enhancing its economic efficiency. Furthermore, the cooling device provides some sound insulation, further improving the fuel pump's environmental performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a refueling pump device for engineering machinery in one embodiment of this application;

[0023] Figure 2 This is a cross-sectional structural schematic diagram of the heat dissipation sleeve of a fuel pump device for engineering machinery in one embodiment of this application;

[0024] Figure 3 This is a cross-sectional structural schematic diagram of the heat dissipation sleeve of a fuel pump device for engineering machinery in one embodiment of this application;

[0025] Explanation of the labels in the diagram:

[0026] 100. Electric motor;

[0027] 200. Fuel pump; 210. First fuel inlet; 220. First fuel outlet;

[0028] 300. Oil suction pipe;

[0029] 400, Heat dissipation sleeve; 410, Heat dissipation chamber; 420, Second oil outlet; 430, Inner liner; 440, Outer shell; 450, Sealing ring; 460, Second oil suction port;

[0030] 500. Fasteners; 510. Fastening plates; 520. Fastening connectors;

[0031] 600. Flexible thermal conductive paper. Detailed Implementation

[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0033] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0034] Combination Figures 1 to 3 As shown in this embodiment, a refueling pump device for construction machinery includes a motor 100 and a refueling pump 200. The output shaft of the motor 100 is fixedly connected to the refueling pump 200. The refueling pump 200 includes a first oil suction port 210 and a first oil outlet 220. The refueling pump device also includes an oil suction pipe 300, a heat dissipation sleeve 400, and a second oil outlet 420. The heat dissipation sleeve 400 has a heat dissipation chamber 410 inside and a second oil outlet 420 on it. One end of the oil suction pipe 300 is fixedly connected to the first oil outlet 220, and the other end of the oil suction pipe 300 is connected to the heat dissipation chamber 410 of the heat dissipation sleeve 400. The heat dissipation sleeve 400 is fitted onto the housing of the motor 100 so that the oil sucked from the oil suction pipe 300 into the heat dissipation chamber 410 flows in the heat dissipation chamber 410 and exchanges heat with the housing of the motor 100.

[0035] Specifically, the motor 100 rotates to drive the fuel pump 200 to transfer fuel. The fuel pump device generally consists of three parts: the pump body of the fuel pump 200, the DC motor 100, and the housing. When the power is turned on, the DC motor 100 generates a magnetic field, driving its rotor to rotate. The rotor drives the impeller inside the pump body to rotate via a connecting shaft. When the impeller rotates at high speed, the first suction port 210 of the fuel pump 200 generates a low-pressure vacuum, drawing in the filtered fuel from the first suction port 210. The drawn-in fuel is pressurized by the impeller and enters the pump housing, then is expelled from the first outlet port 220, completing the fuel filling and delivery. The housing 440 has a first suction port 210 that communicates with the heat dissipation chamber 410, and the end of the suction pipe 300 away from the first outlet port 220 is connected to the first suction port 210.

[0036] When the rotor rotates at high speed, the temperature of the motor 100 gradually increases. When it reaches a certain threshold, the motor 100 reduces its power, which in turn affects the overall production efficiency. In this embodiment, a heat dissipation sleeve 400 is provided on the outside of the motor 100. Specifically, it also includes an oil suction pipe 300, a heat dissipation sleeve 400, and a second oil outlet 420. The oil suction pipe 300 is fixedly connected to the first oil outlet 220 of the fuel pump 200. The first oil suction port 210 of the fuel pump 200 is connected to the oil supply source. After connection, the motor 100 is turned on, and the motor 100 rotates to pump oil into the pump body of the fuel pump 200. The first oil outlet 220 of the fuel pump 200 is connected to the oil suction pipe 300. The oil in the pump body of the fuel pump 200 is introduced into the heat dissipation sleeve 400 through the oil suction pipe 300. The oil exchanges heat with the motor 100 through the flow of oil in the heat dissipation sleeve 400, and then is discharged from the heat dissipation sleeve 400 through the second oil outlet 420, and normally enters the next conveying unit. In other words, the oil passes through the heat dissipation sleeve 400 before entering the next conveying unit. The heat dissipation sleeve 400 is fitted to the outer surface of the motor 100. Therefore, the motor 100 is cooled during the oil conveying process, which removes the heat generated by the motor 100 during operation and reduces the heat accumulation generated by the coil during operation.

[0037] In one specific embodiment, the heat dissipation sleeve 400 includes an inner liner 430, an outer shell 440, and a sealing ring 450. The inner liner 430, the outer shell 440, and the sealing ring 450 together constitute the external shape of the heat dissipation sleeve 400. The gap between the inner liner 430 and the outer shell 440 constitutes the heat dissipation chamber 410. The inner liner 430 is a C-shaped clamp, and the outer shell 440 is a C-shaped thin plate. The outer shell 440 and the inner liner 430 are concentrically arranged. The inner liner 430 is made of elastic material and is a "C"-shaped clamp, which can accommodate motors 100 of different sizes. The inner liner 430 is clamped onto the outer surface of the motor 100, so that the contact area between the inner liner 430 and the outer surface of the motor 100 is as large as possible. The outer shell 440 is a "C"-shaped thin plate, which is also made of elastic material. The outer shell 440 and the inner liner 430 are concentrically arranged. Sealing rings 450 are provided on the sides of the outer shell 440 and the inner liner 430. The sealing rings 450 are used to connect the outer shell 440 and the inner liner 430. That is, one side of the sealing ring 450 is fixedly connected to the inner surface of the outer shell 440, and the other side of the sealing ring 450 is fixedly connected to the outer surface of the inner liner 430. The fixed connection referred to here is a connection method such as welding that can prevent the objects being acted upon from undergoing relative displacement.

[0038] The inner liner 430, outer shell 440, and sealing ring 450 together constitute the external shape of the heat dissipation sleeve 400. The internal space enclosed by the inner liner 430, outer shell 440, and sealing ring 450 is the heat dissipation chamber 410. Oil enters the heat dissipation chamber 410 from the second oil suction port 460 and exits from the heat dissipation chamber 410 from the second oil outlet 420. Designing both the inner liner 430 and outer shell 440 as "C" shapes allows the heat dissipation sleeve 400 to fit well with the outdoor unit of the motor 100. Furthermore, the distance from any point on the inner surface of the outer shell 440 to a point on the outer surface of the nearest inner liner 430 is equal, meaning the thickness of the heat dissipation chamber 410 is uniform, effectively preventing poor oil flow inside the heat dissipation sleeve 400.

[0039] In one specific embodiment, the inner liner 430 is further provided with a fastener 500, which is disposed at the "C"-shaped clamp-like opening of the inner liner 430. The fastener 500 includes two fastening plates 510 and a fastening connector 520. The two fastening plates 510 are respectively fixedly connected to the opening of the inner liner 430, and the fastening connector 520 is disposed on the fastening plates 510 for fastening the inner liner 430 to the motor 100 housing.

[0040] Specifically, the fastener 500 includes two fastening plates 510, both of which are fixedly connected to the opening of the inner liner 430. At the same time, fastening connectors 520 are provided on the fastening plates 510. The fastening connectors 520 can change the distance between the two fastening plates 510, thereby changing the diameter of the heat dissipation sleeve 400. This allows the heat dissipation sleeve 400 to better fit with the housing of the motor 100, thus effectively improving the heat dissipation effect of the heat dissipation sleeve 400 on the housing of the motor 100.

[0041] More specifically, two fastening connectors 520 are provided, and the distances from both fastening connectors 520 to the two sides of the fastening plate 510 are equal. Both fastening connectors 520 are bolt structures, with threaded holes on the fastening plate 510. The bolts of the fastening connectors 520 pass through the threaded holes and threaded nuts. After rotating the bolts and nuts, the distance between the two fastening plates 510 decreases. This allows the heat dissipation sleeve 400 to be fixed to the motor 100 housing while also better fitting the heat dissipation sleeve 400 to the motor 100 housing. In one feasible embodiment, a flexible thermally conductive paper 600 is provided between the liner 430 and the motor 100. The flexible thermally conductive paper 600 conducts the heat generated by the motor 100 to the heat dissipation sleeve, enabling the heat dissipation sleeve 400 to quickly dissipate heat from the motor 100 housing.

[0042] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An oiling pump device for construction machinery, characterized in that: the oiling pump device for construction machinery comprises a motor (100) and an oiling pump (200), the output shaft of the motor (100) is fixedly connected with the oiling pump (200), wherein the oiling pump (200) comprises a first oil suction port (210) and a first oil outlet port (220); the oiling pump device for construction machinery further comprises an oil suction pipeline (300), a heat sink (400) and a second oil outlet port (420), the heat sink (400) has a heat dissipation chamber (410) therein, the second oil outlet port (420) is arranged on the heat sink (400), one end of the oil suction pipeline (300) is fixedly connected with the first oil outlet port (220), the other end of the oil suction pipeline (300) is communicated with the heat dissipation chamber (410) of the heat sink (400), and the heat sink (400) is sleeved on the shell of the motor (100) so that the oil liquid sucked from the oil suction pipeline (300) into the heat dissipation chamber (410) flows in the heat dissipation chamber (410) and exchanges heat with the shell of the motor (100).

2. The oiling pump device for construction machinery according to claim 1, characterized in that: the heat sink (400) comprises an inner liner (430), an outer shell (440) and a sealing ring (450), the inner liner (430), the outer shell (440) and the sealing ring (450) jointly constitute the external shape of the heat sink (400), and the gap between the inner liner (430) and the outer shell (440) constitutes the heat dissipation chamber (410).

3. The oiling pump device for construction machinery according to claim 2, characterized in that: the inner liner (430) is in the shape of a "C" shaped clamp, the outer shell (440) is in the shape of a "C" shaped sheet, and the outer shell (440) and the inner liner (430) are concentrically arranged.

4. The oiling pump device for construction machinery according to any one of claims 1 to 3, characterized in that: the inner liner (430) is further provided with a fastener (500), and the fastener (500) is arranged at the opening of the inner liner (430) in the shape of a "C" shaped clamp.

5. The oiling pump device for construction machinery according to claim 4, characterized in that: the fastener (500) comprises two fastening plates (510) and a fastening connecting piece (520), the two fastening plates (510) are respectively fixedly connected to the openings of the inner liner (430), and the fastening connecting piece (520) is arranged on the fastening plates (510) and used for fastening the inner liner (430) to the shell of the motor (100).

6. The oiling pump device for construction machinery according to claim 5, characterized in that: the fastening connecting piece (520) is provided with two, and the distance from the fastening connecting piece (520) to the fastening plates (510) on both sides is equal.

7. The oiling pump device for construction machinery according to claim 4, characterized in that: the distance from any point on the inner surface of the outer shell (440) to the point on the outer surface of the inner liner (430) nearest to the point is equal. ​ ​ ​ ​ ​ ​ ​ ​ 8. The engineering machinery oiling pump device according to claim 7, characterized in that: a first oil suction port (210) is arranged on the shell (440) and communicates with the heat dissipation chamber (410), and one end of the oil suction pipeline (300) away from the first oil outlet (220) is connected to the first oil suction port (210).

9. The engineering machinery oiling pump device according to claim 4, characterized in that: a flexible heat-conductive paper (600) is arranged between the inner liner (430) and the motor (100).

10. A heat dissipating device characterized by: The heat dissipation device is used in the engineering machinery oiling pump device as claimed in any one of claims 1 to 9, the engineering machinery oiling pump device comprises a motor (100) and an oiling pump (200), the heat dissipation device comprises an oil suction pipeline (300), a heat dissipation sleeve (400) and a second oil outlet (420), the heat dissipation sleeve (400) has a heat dissipation chamber (410) therein, the heat dissipation sleeve (400) is provided with the second oil outlet (420), one end of the oil suction pipeline (300) is fixedly connected to the first oil outlet (220), the other end of the oil suction pipeline (300) communicates with the heat dissipation chamber (410) of the heat dissipation sleeve (400), and the heat dissipation sleeve (400) can be sleeved on the shell of the motor (100) so that the oil liquid sucked from the oil suction pipeline (300) to the heat dissipation chamber (410) flows in the heat dissipation chamber (410) and exchanges heat with the shell of the motor (100).

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