Cooling structure for brake resistor of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to an injection molding machine brake resistor heat dissipation and cooling structure which comprises a brake resistor, an oil tank, a first cooling assembly and a second cooling assembly, and the oil liquid output end of the oil tank and the oil liquid output end of the second cooling assembly are connected with the oil liquid input end of the first cooling assembly. The oil liquid output end of the first cooling assembly is connected with the oil liquid input end of the oil tank and connected with the oil liquid input end of the second cooling assembly, the first cooling assembly is used for cooling oil liquid, and the second cooling assembly is arranged on the brake resistor and used for cooling the brake resistor. The oil cooled by the first cooling assembly of the oil in the injection molding machine is utilized; and hot oil passing through the cooling plate is pumped into the plate cooler for cooling through the motor pump set by virtue of a pipeline, so that the whole cooling process is completed.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an injection molding machine brake resistor heat dissipation and cooling structure. Background Technology

[0002] The braking resistor in an injection molding machine plays a crucial role in slowing down or stopping the machine during operation, making it an essential electrical component. Its main function is to convert the regenerative electrical energy generated during motor braking into heat energy, thus helping the motor stop quickly and smoothly. Specifically, when the motor stops rapidly, the braking resistor converts the regenerative electrical energy generated by the rapid stopping into heat energy, preventing electrical energy feedback to the power grid and causing voltage fluctuations, ensuring stable power grid operation, protecting the motor and frequency converter, and guaranteeing the normal operation of the injection molding machine. Existing braking resistors generate a large amount of heat, causing the machine surface temperature to reach over 90℃, exceeding the human contact temperature requirement of (64±11)℃. Therefore, a larger braking resistor is needed. This braking resistor is installed inside the machine frame, but the internal space of an injection molding machine is compact. An excessively large braking resistor would occupy a significant amount of space and generate considerable heat, affecting the lifespan of surrounding components. Therefore, the performance requirements of the components surrounding the braking resistor must be correspondingly increased. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problems of high temperature of the components around the dynamic resistor in the prior art, which exceeds the safe temperature, and the large space occupied by larger braking resistors, which are also relatively expensive and have heat dissipation issues, a heat dissipation and cooling structure for injection molded braking resistors is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a heat dissipation and cooling structure for a braking resistor in an injection molding machine, including a braking resistor, an oil tank, a first cooling component, and a second cooling component. The oil output terminal of the oil tank and the oil output terminal of the second cooling component are connected to the oil input terminal of the first cooling component. The oil output terminal of the first cooling component is connected to the oil input terminal of the oil tank and the oil input terminal of the second cooling component. The first cooling component is used to provide cooling for the oil. The second cooling component is arranged on the braking resistor and is used to provide cooling for the braking resistor. Through the design of the second cooling component, the oil cooled by the first cooling component in the injection molding machine is utilized. After cooling, 90% of the oil returns to the oil tank, realizing the cooling of the hydraulic oil of the injection molding machine. After cooling, 10% of the oil enters the cooling plate. Then, the three cooling plates are connected in series by connecting pipes to cool the braking resistor. The hot oil after passing through the cooling plate is pumped to the plate cooler through the motor pump unit via pipeline for cooling, completing the entire cooling process.

[0005] To address the design issue of the first cooling component, the design further includes a first cooling component comprising a motor pump assembly and a cooler. The oil output terminal of the oil tank and the oil output terminal of the second cooling component are connected to the input terminal of the motor pump assembly. The output terminal of the motor pump assembly is connected to the oil input terminal of the cooler. The oil output terminal of the cooler is connected to the oil input terminal of the second cooling component and the oil input terminal of the oil tank.

[0006] To address the issue of how the second cooling assembly can efficiently cool the braking resistor, the second cooling assembly further includes several cooling plates with cavities, and the cooling plates are fixedly connected to the braking resistor end face on their respective sides.

[0007] When there is only one cooling plate, the oil inlet of the cooling plate is connected to the oil outlet of the first cooling component, and the oil outlet of the cooling plate is connected to the oil inlet of the first cooling component.

[0008] When there are at least two cooling plates, the oil inlet of the first cooling plate is connected to the oil outlet of the first cooling component, the two cooling plates are connected by a connecting pipe, and the oil outlet of the last cooling plate is connected to the oil inlet of the first cooling component.

[0009] To address the issue of improving the cooling efficiency of the second cooling component, the system further includes an input port and an output port arranged opposite each other on the same cooling plate.

[0010] The device further includes a braking resistor comprising a housing and a resistor body disposed within the housing, the resistor body and the housing being fixedly connected, and three cooling plates disposed on the top surface and left and right end faces of the housing, respectively.

[0011] To address the issue of improving the cooling efficiency of braking resistors, a further step is to have cooling pipes wound around the resistor body.

[0012] The beneficial effects of this utility model are as follows: The injection molding machine brake resistor heat dissipation and cooling structure provided by this utility model utilizes the oil cooled by the first cooling component after cooling the oil in the injection molding machine through the design of the second cooling component. After cooling, 90% of the oil returns to the oil tank, realizing the cooling of the hydraulic oil of the injection molding machine. After cooling, 10% of the oil enters the cooling plate. Then, the three cooling plates are connected in series by connecting pipes to cool the brake resistor. The hot oil after passing through the cooling plate is pumped to the plate cooler through the motor pump unit through the pipeline for cooling, completing the entire cooling process. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a top view of the structure of this utility model;

[0016] Figure 3 This is a utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0017] Figure 4 This is a utility model Figure 2 Schematic diagram of the cross-sectional top view of the structure at point BB;

[0018] Figure 5 This is a three-dimensional structural diagram of the resistor body of this utility model;

[0019] Figure 6 This is a front view structural diagram of the resistor body of this utility model.

[0020] In the diagram: 1. Braking resistor, 11. Housing, 12. Resistor body, 13. Cooling pipe, 2. Oil tank, 3. First cooling assembly, 31. Motor pump set, 32. Cooler, 321. Cooling medium inlet, 322. Cooling medium outlet, 4. Second cooling assembly, 41. Cooling plate, 42. Connecting pipe. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] like Figure 1 This is a schematic diagram of the structure of this utility model, a heat dissipation and cooling structure for a braking resistor in an injection molding machine, including a braking resistor 1, an oil tank 2, a first cooling component 3, and a second cooling component 4. The oil output terminal of the oil tank 2 and the oil output terminal of the second cooling component 4 are connected to the oil input terminal of the first cooling component 3. The oil output terminal of the first cooling component 3 is connected to the oil input terminal of the oil tank 2 and the oil input terminal of the second cooling component 4. The first cooling component 3 is used to provide cooling for the oil. The second cooling component 4 is arranged on the braking resistor 1. The second cooling component 4 is used for... To provide cooling for the braking resistor 1, the design of the second cooling component 4 utilizes the oil cooled by the first cooling component 3 in the injection molding machine. After cooling, 90% of the oil returns to the oil tank, thus cooling the hydraulic oil of the injection molding machine. After cooling, 10% of the oil enters the cooling plate. Then, the three cooling plates 41 are connected in series by the connecting pipe 42 to cool the braking resistor 1. The hot oil after passing through the cooling plate 41 is pumped to the plate cooler 13 through the motor pump group 31 via the pipeline for cooling, completing the entire cooling process.

[0023] like Figure 1 , 2 As shown, the first cooling component 3 includes a motor pump set 31 and a cooler 32. The oil output end of the oil tank 2 and the oil output end of the second cooling component 4 are connected to the input end of the motor pump set 31. The output end of the motor pump set 31 is connected to the oil input end of the cooler 32. The oil output end of the cooler 32 is connected to the oil input end of the second cooling component 4 and the oil input end of the oil tank 2. The cooler 32 is a plate cooler. The motor pump set 31 is a pump set composed of oil pumps. The motor pump set 31 is used to transport oil. The cooler 32 has a cooling medium inlet 321 and a cooling medium outlet 322. The cooler 32 has a tube side and a shell side. Oil is input into the shell side through a pipe and output through another pipe. The cooling medium inlet 321 and the cooling medium outlet 322 are connected to the tube side. The cooling medium inlet 321 and the cooling medium outlet 322 are used for the input and output of cooling medium. In the cooler 32, the cooling medium and oil can exchange heat, thereby achieving the cooling of the oil.

[0024] like Figure 1 , 2 As shown in Figures 3 and 4, the second cooling assembly 4 includes several cooling plates 41 with cavities. The cooling plates 41 are fixedly connected to the end face of the braking resistor 1 on the side where they are located. The cooling plates 41 are hollow flat plates.

[0025] When there is only one cooling plate 41, the oil inlet of the cooling plate 41 is connected to the oil outlet of the first cooling component 3, and the oil outlet of the cooling plate 41 is connected to the oil inlet of the first cooling component 3.

[0026] When there are at least two cooling plates 41, the oil inlet of the first cooling plate 41 is connected to the oil outlet of the first cooling component 3, the two cooling plates 41 are connected by a connecting pipe 42, and the oil outlet of the last cooling plate 41 is connected to the oil inlet of the first cooling component 3.

[0027] In this application, there are three cooling plates 41, which are installed in series. The three cooling plates 41 correspond to the top surface and the left and right end surfaces of the outer shell, respectively.

[0028] like Figure 1 , 2 As shown, the input and output ports on the same cooling plate 41 are arranged opposite to each other, so that the oil flows through the entire cooling plate 41 and stays in the cooling plate 41 for a sufficient time, thus ensuring the cooling effect on the braking resistor 1.

[0029] like Figure 1 , 5As shown, the braking resistor 1 includes a housing 11 and a resistor body 12 arranged inside the housing 11. The resistor body 12 and the housing 11 are fixedly connected. There are three cooling plates 41, which are respectively arranged on the top surface and the left and right end surfaces of the housing 11.

[0030] like Figure 5 , 6 As shown, a cooling tube 13 is wound around the resistor body 12. Figure 1 , 2 As shown in Figures 5 and 6, connecting wires are arranged on the ends of the resistor body 12.

[0031] The oil cooled by the first cooling component 3 is utilized. After cooling by the cooler 32, 90% of the oil returns to the oil tank 2, thus cooling the hydraulic oil of the injection molding machine. After cooling by the cooler 32, 10% of the oil enters the cooling plate 41. Then, the three cooling plates 41 are connected in series by the connecting pipe 42 to cool the braking resistor 1. The hot oil after passing through the cooling plate 41 is pumped to the plate cooler 13 through the motor pump group 31 via the pipeline for cooling, thus completing the entire cooling process.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A braking resistor heat dissipation and cooling structure for injection molding, characterized in that, The system includes a braking resistor (1), an oil tank (2), a first cooling component (3), and a second cooling component (4). The oil output terminal of the oil tank (2) and the oil output terminal of the second cooling component (4) are connected to the oil input terminal of the first cooling component (3). The oil output terminal of the first cooling component (3) is connected to the oil input terminal of the oil tank (2) and the oil input terminal of the second cooling component (4). The first cooling component (3) is used to provide cooling for the oil. The second cooling component (4) is arranged on the braking resistor (1) and is used to provide cooling for the braking resistor (1).

2. The injection molding machine brake resistor heat dissipation and cooling structure as described in claim 1, characterized in that: The first cooling assembly (3) includes a motor pump set (31) and a cooler (32). The oil output end of the oil tank (2) and the oil output end of the second cooling assembly (4) are connected to the input end of the motor pump set (31). The output end of the motor pump set (31) is connected to the oil input end of the cooler (32). The oil output end of the cooler (32) is connected to the oil input end of the second cooling assembly (4) and the oil input end of the oil tank (2). The cooler (32) has a cooling medium inlet (321) and a cooling medium outlet (322).

3. The injection molding machine brake resistor heat dissipation and cooling structure as described in claim 1, characterized in that: The second cooling assembly (4) includes several cooling plates (41) with cavities, and the cooling plates (41) are fixedly connected to the end face of the braking resistor (1) on their respective sides. When there is only one cooling plate (41), the oil inlet of the cooling plate (41) is connected to the oil outlet of the first cooling component (3), and the oil outlet of the cooling plate (41) is connected to the oil inlet of the first cooling component (3). When there are at least two cooling plates (41), the oil inlet of the first cooling plate (41) is connected to the oil outlet of the first cooling assembly (3), the two cooling plates (41) are connected by a connecting pipe (42), and the oil outlet of the last cooling plate (41) is connected to the oil inlet of the first cooling assembly (3).

4. The injection molding machine brake resistor heat dissipation and cooling structure as described in claim 3, characterized in that: The input and output ports on the same cooling plate (41) are arranged opposite to each other.

5. The injection molding machine brake resistor heat dissipation and cooling structure as described in claim 3, characterized in that: The braking resistor (1) includes a housing (11) and a resistor body (12) arranged inside the housing (11). The resistor body (12) and the housing (11) are fixedly connected. There are three cooling plates (41), which are respectively arranged on the top surface and the left and right end surfaces of the housing (11).

6. The injection molding machine brake resistor heat dissipation and cooling structure as described in claim 5, characterized in that: Cooling tubes (13) are wound around the resistor body (12).

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