Constant temperature casting system for high-density electric propulsion units for marine applications

Abstract

The utility model provides a constant temperature pouring system for a high-density electric propulsion unit for marine parts, comprising: a horizontal pouring model and a pouring pipe; the horizontal pouring model has an annular upper part and a connecting part located on one side, and the annular upper part and the connecting part are both provided with a plurality of risers; the pouring pipe comprises a straight runner, a bent runner and a lower ingrown runner connected in sequence, the lower ingrown runner is located at the bottom of the horizontal pouring model, the end of the lower ingrown runner is connected upward to the annular upper part, and is connected to the connecting part in two ways, and the bent runner is connected to the annular upper part in one way. The utility model arranges a bent runner between the straight runner, the bent runner and the lower ingrown runner, and uses the bent runner for buffering, thereby reducing the impact of the molten metal on the bottom of the runner, reducing a series of problems such as runner damage, molten metal splashing, and the inclusion of gas impurities, and improving the quality and performance of the casting.

Description

Technical Field

[0001] The utility model relates to the technical field of casting pouring systems, in particular to a constant temperature pouring system for a high-density electric propeller for a marine part. Background Art

[0002] Marine electric propulsion is a device used to propel ships. It usually uses an electric motor to drive a propeller to propel the ship, which is a commonly used method of electric propulsion.

[0003] The requirements for the shell casting of electric thrusters are quite strict, because the quality and performance of the shell directly affect the overall operation effect and service life of the thruster. The shell should have sufficient strength and durability to withstand the various forces and vibrations during the operation of the thruster. The shell should have good sealing to prevent liquid or gas leakage. The shape of the shell should be as simple as possible to reduce complex structures for easy processing and installation.

[0004] The existing thruster housing usually adopts a horizontal pouring system design during the casting process. During pouring, the molten metal enters the sprue from the pouring cup and enters the model through the lower ingender. In the actual pouring process, this design will make the sprue distance longer, and the injected molten metal will impact the bottom. This impact will bring a series of problems, such as damage to the sprue, splashing of molten metal, and entrapment of gas impurities, which will affect the quality and performance of the casting.

[0005] At the same time, the length of the runner brings another problem to the pouring. The liquid metal cools down quickly, and the casting is more likely to have defects such as cold shut, incomplete filling, and deformation.

[0006] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0007] The utility model provides a constant temperature pouring system based on a high-density electric propeller for a marine component, so as to solve the above-mentioned problem.

[0008] A technical solution adopted by the utility model is: to provide a constant temperature pouring system for a high-density electric propeller for a marine part, comprising: a horizontal pouring model and a pouring pipeline;

[0009] The horizontal casting mold has an annular upper portion and a connecting portion located on one side, and the annular upper portion and the connecting portion are both provided with a plurality of risers;

[0010] The pouring pipeline includes a straight runner, a bent runner and a lower ingredient that are connected in sequence. The lower ingredient is located at the bottom of the horizontal pouring model, and its end is connected to the annular upper part upward, and is connected to the connecting part in two ways. The bent runner is connected to the annular upper part in one way, and the bent runner is used for buffering to reduce the impact of the molten metal on the bottom of the runner.

[0011] Furthermore, it also includes a heat transfer medium temperature control device;

[0012] The lower ingrate has a plurality of constant temperature sections, and a spiral constant temperature channel is arranged in the side wall of the constant temperature section. The inlet of the constant temperature channel is connected with the output port of the heat transfer medium temperature control device, and the outlet is connected with the input port of the heat transfer medium temperature control device. The heat transfer medium within a predetermined temperature range is transported into the constant temperature channel through the heat transfer medium temperature control device, so that the temperature of the constant temperature section is maintained within a certain range.

[0013] Furthermore, the output port of the heat transfer medium temperature control device is provided with an output main pipe, and the output main pipe is divided into a plurality of output branch pipes connected to the inlet of the corresponding constant temperature channel;

[0014] The output main pipe is provided with an intermittent injection pump, and the output branch pipe is provided with a flow regulating valve, which can inject different amounts of heat transfer medium into each constant temperature section to adjust the temperature.

[0015] Furthermore, a thermocouple is provided in the constant temperature section for measuring the temperature of the molten metal in real time, and the opening of each output branch pipe is determined according to the actual temperature, so as to accurately adjust the temperature of each constant temperature section.

[0016] The beneficial effects of the constant temperature pouring system of the utility model marine high-density electric propeller are:

[0017] 1. A bent runner is set between the straight runner, the bent runner and the lower ingates. The bent runner is used for buffering to reduce the impact of the molten metal on the bottom of the runner, reduce a series of problems such as runner damage, molten metal splashing, and entrapment of gas impurities, and improve the quality and performance of castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a horizontal pouring model and a pouring pipeline in the first embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of a pouring pipeline in the first embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the constant temperature section in the first embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of constant temperature control in the first embodiment of the utility model;

[0022] The components in the accompanying drawings are marked as follows: 1. annular upper part, 2 connecting part, 3. straight runner, 4. bending runner, 5. lower ingrate, 6. heat transfer medium temperature control device, 51. constant temperature section, 52. inlet, 61. flow regulating valve, 62. intermittent injection pump. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] See also Figures 1 to 4 The first embodiment of the utility model provides a constant temperature pouring system for a high-density electric propulsion unit for a marine component, comprising: a horizontal pouring model and a pouring pipeline;

[0026] The horizontal casting model has an annular upper part 1 and a connecting part 2 located on one side, the upper surface of the annular upper part 1 is evenly provided with eight feeding risers, and the connecting part 2 is symmetrically provided with two feeding risers;

[0027] The pouring pipeline includes a straight runner 3, a bent runner 4 and a lower ingrate 5 connected in sequence. The straight runner 3 has a pouring cup at the top. The lower ingrate 5 is located at the bottom of the horizontal pouring model. The end of the lower ingrate 5 is connected to the annular upper part 1 upwards and is connected to the connecting part 2 in two ways. The bent runner 4 is connected to the annular upper part 1 in one way.

[0028] After the molten metal enters the straight runner 3, it will be buffered by the bent runner 4 to reduce the impact on the runner, and then it will fill the connecting part 2 to the entire model.

[0029] Since the overall runner is long, in order to prevent the temperature of the molten metal from dropping too much in the lower runner 5 area, the pouring system also includes a heat transfer medium temperature control device 6:

[0030] The heat transfer medium temperature control device 6 stores oil as a heat transfer medium and a heating structure for controlling the oil temperature;

[0031] The lower ingrate 5 has three constant temperature sections 51, and a spiral constant temperature channel is arranged in the side wall of the constant temperature section 51. The inlet 52 of the constant temperature channel is connected to the output port of the heat transfer medium temperature control device 6, and the outlet is connected to the input port of the heat transfer medium temperature control device 6.

[0032] The heat transfer medium temperature control device 6 delivers oil within a predetermined temperature range into the constant temperature channel to heat the molten metal in the constant temperature section 51 so as to keep it within a certain temperature range.

[0033] Specifically, the output port of the heat transfer medium temperature control device 6 is provided with an output main pipe, which is divided into three output branches connected to the corresponding inlet 52 of the constant temperature channel. An intermittent injection pump 62 is provided on the output main pipe, which can controllably transport hot oil to the constant temperature section 51.

[0034] A flow regulating valve 61 is provided on the output branch pipe, and a thermocouple is also provided in the constant temperature section 51 for real-time measurement of the temperature of the molten metal;

[0035] The thermocouple, flow regulating valve 61, intermittent injection pump 62 and heat transfer medium temperature control device 6 are all regulated by the controller;

[0036] Before pouring begins, hot oil can be delivered to the constant temperature section 51 to preheat it;

[0037] During the pouring process, the opening of the flow regulating valve 61 can be adjusted according to the actual temperature of the molten metal in each constant temperature section 51 , and accurate temperature regulation can be performed by injecting different amounts of heat transfer medium into each constant temperature section 51 .

[0038] The beneficial effects of the constant temperature pouring system of the utility model marine high-density electric propeller are:

[0039] 1. A bent runner is set between the straight runner, the bent runner and the lower ingates. The bent runner is used for buffering to reduce the impact of the molten metal on the bottom of the runner, reduce a series of problems such as runner damage, molten metal splashing, and the inclusion of gas impurities, and improve the quality and performance of castings;

[0040] 2. By setting several constant temperature sections in the lower ingrate and using the heat transfer medium temperature control device to input the heat transfer medium to maintain the temperature of the constant temperature section, the molten metal can be kept within a certain temperature range after entering the lower ingrate, thereby having better fluidity during the filling process of the model, and is less likely to cause defects such as cold shut, underfilling, and deformation;

[0041] 3. By installing intermittent injection pumps and flow regulating valves on the output main pipe and branch pipes, and installing thermocouples in the constant temperature section, the temperature of the constant temperature section can be controlled more accurately to prepare a high-density electric thruster shell.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Constant temperature casting system for high-density electric propulsion for marine parts, characterized by: include: Horizontal casting molds and casting pipes; The horizontal casting mold has an annular upper portion and a connecting portion located on one side, and the annular upper portion and the connecting portion are both provided with a plurality of risers; The pouring pipeline includes a straight runner, a bent runner and a lower ingredient which are connected in sequence. The lower ingredient is located at the bottom of the horizontal pouring model, and its end is connected to the annular upper part upward and is connected to the connecting part in two ways. The bent runner is connected to the annular upper part in one way.

2. The constant temperature pouring system for high-density electric propulsion of marine parts according to claim 1 is characterized in that: Also includes a heat transfer medium temperature control device; The lower ingrate has a plurality of constant temperature sections, and a spiral constant temperature channel is arranged in the side wall of the constant temperature section. The inlet of the constant temperature channel is connected to the output port of the heat transfer medium temperature control device, and the outlet is connected to the input port of the heat transfer medium temperature control device.

3. The constant temperature pouring system for high-density electric propulsion of marine parts according to claim 2 is characterized in that: The output port of the heat transfer medium temperature control device is provided with an output main pipe, and the output main pipe is divided into a plurality of output branches connected to the inlet of the corresponding constant temperature channel; the output main pipe is provided with an intermittent injection pump, and the output branch pipe is provided with a flow regulating valve.

4. The constant temperature pouring system for high-density electric propulsion of marine parts according to claim 3 is characterized in that: A thermocouple is also arranged in the constant temperature section.

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