High-efficiency hydraulic torque converter

Abstract

The utility model discloses a high-efficiency hydraulic torque converter, which relates to the technical field of hydraulic torque converters, and comprises a pump wheel part and a turbine part which are assembled together, and a guide wheel part arranged in the pump wheel part and the turbine part, the inner surfaces of the pump wheel part and the turbine part and the outer surface of the guide wheel part are respectively provided with an oleophobic layer, and the outer surface of the guide wheel part is provided with an oleophobic layer. Through the arrangement of the polytetrafluoroethylene modified coatings, oleophobic layers are formed on the surfaces of the pump wheel part, the turbine part and the guide wheel part, a gas film can be formed between working liquid and solid through the micro-nano structures of the oleophobic layers, the liquid and the solid slide due to the gas film, the sliding speed of the wall face is increased along with the increase of the shearing force rate of the wall face, and the sliding speed of the wall face is increased. Therefore, under the high-speed working condition, the drag reduction effect is more remarkable, the efficiency of the hydraulic torque converter is greatly improved, the burr protruding parts can well adsorb the modified coating, the modified coating is prevented from falling off in the later working process, and the durability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic torque converters, in particular to a high-efficiency hydraulic torque converter. Background Art

[0002] The hydraulic torque converter is a type of hydraulic transmission component, consisting of a pump wheel, a turbine wheel and a guide wheel. The pump wheel is connected to the driving shaft and can convert the mechanical energy input by the driving shaft into the kinetic energy and pressure head of the liquid by relying on the action of centrifugal force for the turbine to do work. The turbine is connected to the driven shaft and can output the kinetic energy of the liquid and the energy contained in the pressure head from the driven shaft. The hydraulic torque converter has good automatic adaptability. According to the driving resistance or other operating resistance of the machine, the torque converter can automatically and steplessly change speed and torque within a certain range, with good stability and long service life.

[0003] However, when the working fluid flows in the circulating circular flow channel of the torque converter, friction will occur between the flow channel wall, thereby losing some energy. The flow characteristics of the working fluid in the circulating circle are: on the one hand, it rotates with the working wheel, and on the other hand, it circulates along the working wheel blades in the circulating circle. Therefore, the flow of liquid in the torque converter is a rotating screw motion. Under the same flow rate, the loss in the rotating flow channel will be several times the loss in the non-rotating flow channel, resulting in a relatively low efficiency of the torque converter. Utility Model Content

[0004] The purpose of the utility model is to provide a high-efficiency hydraulic torque converter to solve the technical problems mentioned in the above background technology.

[0005] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0006] A high-efficiency hydraulic torque converter comprises a pump wheel component and a turbine component assembled together, and a guide wheel component arranged inside the pump wheel component and the turbine component;

[0007] Among them, the inner surfaces of the pump wheel component and the turbine component and the outer surface of the guide wheel component are all provided with an oleophobic layer, and the oleophobic layer also includes a plurality of densely arranged burr protrusions and a modified coating coated on the outer surface of the oleophobic layer, and the material of the modified coating is polytetrafluoroethylene.

[0008] As a further solution of the utility model: there is a coating gap between the burr protrusions, and the modified coating is filled in the coating gap.

[0009] As a further solution of the utility model: one side of the pump wheel component is connected to a driving shaft, and one side of the turbine component is connected to a driven shaft.

[0010] As a further solution of the utility model: a clutch assembly is arranged on the outer side of the driven shaft, and the clutch assembly is located on one side of the turbine component.

[0011] As a further solution of the utility model: the outer sleeve of the driving shaft is provided with a bearing sleeve, the bearing sleeve is located on one side of the pump wheel, and a silent bearing for supporting the driving shaft is arranged inside the bearing sleeve.

[0012] Beneficial effects of the utility model:

[0013] The utility model forms an oleophobic layer on the surfaces of the pump wheel, turbine and guide wheel by setting a modified polytetrafluoroethylene coating. The micro-nano structure of the oleophobic layer can form an air film between the working liquid and the solid. The air film causes slippage between the liquid and the solid. The wall slip velocity increases with the increase of the wall shear force rate. Therefore, under high-speed conditions, the drag reduction effect will be more significant, which greatly increases the efficiency of the torque converter. The existing burr protrusions can form a good adsorption for the modified coating, which avoids the modified coating from falling off during the later working process, thereby improving the durability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a three-dimensional schematic diagram of the whole device in the utility model;

[0016] Figure 2 It is a three-dimensional schematic diagram of the driving shaft in the utility model;

[0017] Figure 3 It is a three-dimensional schematic diagram of the guide wheel component in the utility model;

[0018] Figure 4 It is a three-dimensional schematic diagram of the pump wheel in the utility model;

[0019] Figure 5 It is a schematic diagram of the oleophobic layer structure in the utility model.

[0020] In the figure: 1. Pump wheel component; 2. Turbine component; 3. Guide wheel component; 4. Burr protrusion; 5. Modified coating; 6. Coating gap; 7. Driving shaft; 8. Driven shaft; 9. Clutch assembly; 10. Bearing sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-5 As shown, a high-efficiency hydraulic torque converter comprises a pump wheel component 1 and a turbine component 2 assembled together, a guide wheel component 3 arranged inside the pump wheel component 1 and the turbine component 2, a driving shaft 7 is connected to one side of the pump wheel component 1, a driven shaft 8 is connected to one side of the turbine component 2, a clutch assembly 9 is arranged outside the driven shaft 8, and the clutch assembly 9 is located on one side of the turbine component 2. When the device is in use, the inside of the pump wheel component 1 and the turbine component 2 is filled with working fluid, the driving shaft 7 is connected to the engine transmission component, thereby driving the pump wheel component 1 to rotate The working fluid in the impeller 1 rotates, and under the action of centrifugal force, the blade edge of the impeller 1 rushes toward the turbine 2, and flows along the blades of the turbine 2 to the guide wheel 3, and then flows back to the blade edge of the impeller 1 through the blades of the guide wheel 3, thereby completing the circulation of the working fluid. In the process of the circulating flow of the working fluid, the guide wheel 3 gives the turbine 2 a reaction torque, so that the output torque of the turbine 2 is different from the input torque of the impeller 1, so that the turbine 2 drives the driven shaft 8 to rotate, and the purpose of torque conversion is achieved;

[0023] Among them, the inner surfaces of the pump wheel component 1 and the turbine component 2 and the outer surface of the guide wheel component 3 are all provided with an oleophobic layer, and the oleophobic layer also includes a plurality of densely arranged burr protrusions 4 and a modified coating 5 coated on the outer surface of the oleophobic layer, and the material of the modified coating 5 is polytetrafluoroethylene, and there is a coating gap 6 between the burr protrusions 4, and the modified coating 5 is filled in the coating gap 6. The burr protrusions 4 provided can form a good adsorption on the modified coating 5, so as to avoid the modified coating 5 from falling off during the later working process, thereby improving the durability of the device, and the coating gap 6 between the burr protrusions 4 can make the modified coating 5 have a larger coating amount during coating, thereby ensuring the thickness of the modified coating 5, and the coated polytetrafluoroethylene modified coating 5 forms an oleophobic layer on the inner surfaces of the impeller 1 and the turbine 2 and the outer surface of the guide wheel 3. When the working fluid circulates, the oleophobic layers on the inner surfaces of the impeller 1 and the turbine 2 and the outer surface of the guide wheel 3 come into contact with the working fluid. The micro-nano structure of the oleophobic layer can form an air film between the working fluid and the solid. The air film causes slippage between the liquid and the solid, so that part of the working fluid comes into contact with the air film instead of directly coming into contact with the solid surface, thereby reducing the friction between the working fluid and the solid. In addition, the oleophobic layer can weaken the large-scale vortex structure in the near-wall area of ​​the impeller 1, the turbine 2 and the guide wheel 3, thereby reducing the friction contribution of the vortex to the wall surface, reducing the flow resistance, and thus improving the relative efficiency of the torque converter.

[0024] Produce slippage, reduce drag, and increase the efficiency of the torque converter due to surface slippage

[0025] In this embodiment, specifically, a bearing sleeve 10 is provided on the outer side of the driving shaft 7, the bearing sleeve 10 is located on one side of the pump wheel 1, and a silent bearing for supporting the driving shaft 7 is provided inside the bearing sleeve 10. The bearing sleeve 10 can minimize the friction generated by the driving shaft 7 during rotation, and the silent bearing can greatly reduce the noise generated by the device during operation.

[0026] Processing method:

[0027] 1. Workpiece preparation: remove all grease from the surfaces of the pump impeller 1, turbine 2 and guide wheel 3 to be coated, dissolve the grease with an organic solvent and heat it to 400 degrees to make it completely volatilize, then use a sandblasting method to clean the pump impeller 1, turbine 2 and guide wheel 3 and make the surfaces of the pump impeller 1, turbine 2 and guide wheel 3 rough to form burr protrusions 4, and improve the bonding ability of the modified coating 5 with the surface of the pump impeller 1, turbine 2 and guide wheel 3 by applying an adhesive additive;

[0028] 2. Making a dispersion modified coating 5 or a powder modified coating 5: The dispersion modified coating 5 is made by wet processing, or the powder modified coating 5 is made by dry processing. When wet processing is used: the coating material is evenly distributed in the solvent to form a dispersion liquid, wherein solid coating powder is mixed in the liquid; when dry processing is used, the coating material in the form of extremely fine solid particles is used;

[0029] 3. Spraying: Spraying is performed using a four-axis polytetrafluoroethylene spraying device. When wet processing is used: the coating dispersion is atomized by high-pressure air and sprayed on the surface of the pump wheel 1, turbine 2 and guide wheel 3, while controlling the coating thickness; when dry processing is used, no solvent is required;

[0030] 4. Drying: Heat the wet modified coating 5 in an oven at a temperature below 100 degrees until most of the solvent has evaporated;

[0031] 5. Sintering: The pump wheel component 1, the turbine component 2 and the guide wheel component 3 are heated until the modified coating 5 material is melted and forms a network structure with the bonding aid.

[0032] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A high-efficiency hydraulic torque converter, characterized in that: It comprises a pump wheel component (1) and a turbine component (2) assembled together, and a guide wheel component (3) arranged inside the pump wheel component (1) and the turbine component (2); The inner surfaces of the pump wheel component (1) and the turbine component (2) and the outer surface of the guide wheel component (3) are all provided with an oleophobic layer, the oleophobic layer further comprising a plurality of densely arranged burr protrusions (4) and a modified coating (5) coated on the outer surface of the oleophobic layer, the modified coating (5) being made of polytetrafluoroethylene.

2. A high-efficiency hydraulic torque converter according to claim 1, characterized in that: A coating gap (6) exists between the burr protrusions (4), and the modified coating (5) is filled in the coating gap (6).

3. A high-efficiency hydraulic torque converter according to claim 1, characterized in that: One side of the pump wheel component (1) is connected to a driving shaft (7), and one side of the turbine component (2) is connected to a driven shaft (8).

4. A high-efficiency hydraulic torque converter according to claim 3, characterized in that: A clutch assembly (9) is provided on the outer side of the driven shaft (8), and the clutch assembly (9) is located on one side of the turbine component (2).

5. A high-efficiency hydraulic torque converter according to claim 3, characterized in that: A bearing sleeve (10) is provided on the outer side of the driving shaft (7), the bearing sleeve (10) is located on one side of the pump wheel (1), and a silent bearing for supporting the driving shaft (7) is provided inside the bearing sleeve (10).

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