A pump wheel and a hydrodynamic torque converter

Abstract

This invention provides a pump impeller and a hydraulic torque converter, including a pump housing and a guide tongue. The pump housing has a supply channel, and the outlet of the supply channel has a settling tank and a diverter tongue. At least one end of the diverter tongue is flush with the bottom of the settling tank. One end of the guide tongue is fixedly connected to the diverter tongue, and the other end of the guide tongue is flush with the opening of the settling tank. The angle of inclination of the guide tongue surface relative to the bottom of the settling tank is less than 60°. The hydraulic torque converter includes the aforementioned pump impeller and turbine. The turbine includes a volute housing, within which a supply channel is provided. The inlet of the supply channel and the outlet of the supply channel are opposite to each other. Using the technical solution of this invention, the centrifugal force generated by the pump impeller blades causes the oil to be thrown outwards along the inner edge of the pump impeller blades. Because the guide tongue and the diverter tongue are fixedly connected, the oil accurately and effectively impacts the outer edge of the turbine blades along the surface of the guide tongue, thereby improving the efficiency of oil energy transfer and thus increasing the energy capacity of the hydraulic torque converter.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic torque converter technology, and in particular to a pump impeller and a hydraulic torque converter. Background Technology

[0002] A hydraulic torque converter is a non-rigid torque converter that uses liquid as its working medium. It is a form of hydraulic transmission. Existing hydraulic torque converters consist of a pump impeller, a turbine, and a guide wheel. Installed between the engine and transmission, the hydraulic torque converter serves as the working medium, transmitting torque, changing torque, shifting speed, and engaging / disengaging the clutch. The pump impeller is connected to the engine input shaft, the turbine to the output shaft, and the guide wheel is positioned between the pump impeller and the turbine. Oil fills the space between the pump impeller blades. When engine power is transmitted to the pump impeller via the input shaft, the blades rotate at high speed. The centrifugal force generated by the pump impeller blades throws the oil along the inner edge of the blades to the outer edge, allowing the oil to enter the turbine. The oil then impacts the outer edge of the turbine blades, driving the turbine blades to rotate in the same direction as the pump impeller blades, thus transmitting power to the output shaft. The oil then flows back to the turbine via the guide wheel, forming a circulating vortex.

[0003] A hydraulic torque converter is a type of hydraulic component. Energy capacity is an important indicator of a hydraulic component's ability to transmit energy. To improve the energy capacity of hydraulic torque converters, existing technology, such as patent document CN103939564A, discloses a hydraulic speed regulating device. This device consists of three parts: a two-stage planetary gear transmission mechanism, a guide vane adjustable hydraulic torque converter, and a guide vane adjustment mechanism. The varying speed and torque input are connected to the input shaft, which is connected to the first-stage planetary carrier. The first-stage planetary carrier is then connected to the output shaft via connected first-stage planetary gears and the first-stage sun gear on the output shaft. The technical solution provided by this patent document can automatically select the speed regulation range according to the power input speed characteristics of the application. By increasing the guide vane opening of the torque converter, more power is absorbed, resulting in a constant output speed. Conversely, by decreasing the guide vane opening when the input speed decreases, less power is absorbed, also achieving a constant output speed. However, according to the working principle of a hydraulic torque converter, the impact of the hydraulic fluid on the outer edge of the turbine blades is the driving force behind the high-speed rotation of the turbine. Only when the hydraulic fluid accurately impacts the outer edge of the turbine blades can the efficiency of energy transfer be maximized. However, the large gap between the turbine blades and the volute prevents the hydraulic fluid from fully impacting the outer edge of the turbine blades. Consequently, some of the hydraulic fluid impact force is not effectively transferred to the turbine blades, resulting in a lower hydraulic torque converter capacity. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a pump impeller and a hydraulic torque converter.

[0005] The present invention is achieved through the following technical solutions.

[0006] This invention provides a pump impeller and a hydraulic torque converter, including a pump housing and a guide tongue. The pump housing is provided with a liquid supply channel, and the outlet of the liquid supply channel is provided with a settling tank and a diverting tongue. At least one end of the diverting tongue is flush with the bottom of the settling tank. One end of the guide tongue is fixedly connected to the diverting tongue, and the other end of the guide tongue is flush with the opening of the settling tank. The angle of inclination of the surface of the guide tongue relative to the bottom of the settling tank is less than 60°.

[0007] The pump wheel also includes a liquid guiding outer ring, which is nested in the settling tank, and the inner surface of the liquid guiding outer ring is flush with the inner surface of the liquid supply channel. The guide tongue is also accommodated in the liquid guiding outer ring.

[0008] The pump wheel also includes a liquid guiding inner ring, which is nested in the settling tank, and the outer surface of the liquid guiding inner ring is flush with the inner surface of the liquid supply channel. The guide tongue is accommodated between the liquid guiding outer ring and the liquid guiding inner ring.

[0009] One end of the guide tongue is flush with one side of the outer or inner ring of the liquid guide, and the other end of the guide tongue is flush with the other side of the outer or inner ring of the liquid guide.

[0010] The outer fluid guiding ring, the inner fluid guiding ring, and the guide tongue are manufactured as a single piece.

[0011] The guide tongue is a flat, thin plate.

[0012] The thickness of the outer fluid guiding ring and the thickness of the inner fluid guiding ring are consistent with the depth of the settling tank.

[0013] In addition, the present invention also provides a hydraulic torque converter, including a pump impeller and a turbine as described above, the turbine including a volute housing, the volute housing having a fluid delivery channel, the inlet of the fluid delivery channel and the outlet of the fluid supply channel being opposite to each other.

[0014] The hydraulic torque converter also includes a guide wheel, which has a liquid guiding channel. The inlet of the liquid guiding channel and the outlet of the liquid supply channel are opposite to each other, and the outlet of the liquid guiding channel and the inlet of the liquid supply channel are opposite to each other.

[0015] The beneficial effects of the present invention are as follows: When the blades inside the pump wheel rotate at high speed using the technical solution of the present invention, the centrifugal force generated by the pump wheel blades causes the oil to be thrown out along the inner edge of the pump wheel blades to its outer edge, and the oil enters the turbine. Since the guide tongue and the splitting tongue are fixed together, the oil accurately and effectively impacts the outer edge of the turbine blades along the surface of the guide tongue, thereby improving the efficiency of oil energy transfer and thus improving the energy capacity of the hydraulic torque converter. Attached Figure Description

[0016] Figure 1 This is a front view of the pump wheel of the present invention;

[0017] Figure 2 This is an exploded view of the pump impeller of the present invention;

[0018] Figure 3 This is a front view of the hydraulic torque converter of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the liquid-guiding outer ring, the liquid-guiding inner ring, and the guide tongue of the present invention.

[0020] In the diagram: 1-Pump casing, 2-Guide tongue, 3-Liquid supply channel, 4-Settling tank, 5-Diverter tongue, 6-Outer guide ring, 7-Inner guide ring, 8-Pump impeller, 9-Turbine, 10-Vortex casing, 11-Liquid delivery channel, 12-Guide wheel, 13-Liquid guide channel. Detailed Implementation

[0021] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0022] like Figures 1 to 4 As shown, the present invention provides a pump impeller and a hydraulic torque converter, including a pump housing 1 and a guide tongue 2. The pump housing 1 is provided with a liquid supply channel 3. The outlet of the liquid supply channel 3 is provided with a settling tank 4 and a diverting tongue 5. At least one end of the diverting tongue 5 is flush with the bottom of the settling tank 4. One end of the guide tongue 2 is fixedly connected to the diverting tongue 5, and the other end of the guide tongue 2 is flush with the opening of the settling tank 4. The angle of inclination of the surface of the guide tongue 2 relative to the bottom of the settling tank 4 is less than 60°.

[0023] By employing the technical solution of this invention, when the blades inside the pump impeller rotate at high speed, the centrifugal force generated by the pump impeller blades causes the oil to be thrown out along the inner edge of the pump impeller blades to its outer edge, and the oil enters the turbine. Since the guide tongue and the splitting tongue are fixed together, the oil accurately and effectively impacts the outer edge of the turbine blades along the surface of the guide tongue, thereby improving the efficiency of oil energy transfer and thus improving the energy capacity of the hydraulic torque converter.

[0024] Specifically, the pump impeller 8 also includes a liquid-guiding outer ring 6, which is nested within the settling tank 4, and the inner surface of the liquid-guiding outer ring 6 is flush with the inner surface of the liquid supply channel 3. A guide tongue 2 is also accommodated within the liquid-guiding outer ring 6. The pump impeller 8 also includes a liquid-guiding inner ring 7, which is nested within the settling tank 4, and the outer surface of the liquid-guiding inner ring 7 is flush with the inner surface of the liquid supply channel 3. A guide tongue 2 is accommodated between the liquid-guiding outer ring 6 and the liquid-guiding inner ring 7. One end of the guide tongue 2 is flush with one side of the liquid-guiding outer ring 6 or the liquid-guiding inner ring 7, and the other end of the guide tongue 2 is flush with the other side of the liquid-guiding outer ring 6 or the liquid-guiding inner ring 7. The liquid-guiding outer ring 6, the liquid-guiding inner ring 7, and the guide tongue 2 are integrally manufactured. By employing the technical solution of this invention, the outer fluid guiding ring 6 and the inner fluid guiding ring 7 respectively fill the step between the settling tank and the fluid supply channel 3, thereby enabling all the oil to pass through the surface of the guide tongue 2 and effectively impact the outer edge of the turbine blades, further improving the capacity of the hydraulic torque converter. Actual measurements show that when the angle of inclination of the guide tongue 2 surface relative to the bottom of the settling tank 4 is 60°, the hydraulic torque converter is optimally matched with a diesel engine with a rated power of 170kW and a rated speed of 2100rpm. Compared to when the angle of inclination of the guide tongue 2 surface relative to the bottom of the settling tank 4 is 80°, the capacity of the hydraulic torque converter is increased by 25%.

[0025] In addition, the guide tongue 2 is a flat, thin plate. The thickness of the outer liquid-guiding ring 6 and the thickness of the inner liquid-guiding ring 7 are consistent with the depth of the settling tank 4.

[0026] Furthermore, the present invention also provides a hydraulic torque converter, including a pump impeller 8 and a turbine 9 as described above. The turbine 9 includes a volute 10, within which a fluid delivery channel 11 is provided. The inlet of the fluid delivery channel 11 and the outlet of the fluid supply channel 3 are opposite to each other. Specifically, the hydraulic torque converter also includes a guide wheel 12, within which a guide channel 13 is provided. The inlet of the guide channel 13 and the outlet of the fluid delivery channel 11 are opposite to each other, and the outlet of the guide channel 13 and the inlet of the fluid supply channel 3 are opposite to each other.

Claims

1. A pump impeller, characterized in that: The pump includes a pump housing (1) and a guide tongue (2). The pump housing (1) is provided with a liquid supply channel (3). The outlet of the liquid supply channel (3) is provided with a settling tank (4) and a diverting tongue (5). At least one end of the diverting tongue (5) is flush with the bottom of the settling tank (4). One end of the guide tongue (2) is fixedly connected to the diverting tongue (5). The other end of the guide tongue (2) is flush with the opening of the settling tank (4). The angle of inclination of the surface of the guide tongue (2) relative to the bottom of the settling tank (4) is less than 60°. The pump impeller (8) also includes a liquid guiding outer ring (6), which is nested in the settling tank (4), and the inner surface of the liquid guiding outer ring (6) is flush with the inner surface of the liquid supply channel (3). The guide tongue (2) is also accommodated in the liquid guiding outer ring (6). The pump impeller (8) also includes a liquid guiding inner ring (7), which is nested in the settling tank (4), and the outer surface of the liquid guiding inner ring (7) is flush with the inner surface of the liquid supply channel. (3) The inner surface is flush with the liquid guide tongue (2), which is accommodated between the liquid guide outer ring (6) and the liquid guide inner ring (7). One end of the liquid guide tongue (2) is flush with one side of the liquid guide outer ring (6) or the liquid guide inner ring (7), and the other end of the liquid guide tongue (2) is flush with the other side of the liquid guide outer ring (6) or the liquid guide inner ring (7). The liquid guide outer ring (6), the liquid guide inner ring (7) and the liquid guide tongue (2) are integrally manufactured.

2. The pump impeller as described in claim 1, characterized in that: The guide tongue (2) is a flat thin plate.

3. The pump impeller as described in claim 1, characterized in that: The thickness of the outer fluid guiding ring (6) and the thickness of the inner fluid guiding ring (7) are consistent with the depth of the settling tank (4).

4. A hydraulic torque converter, characterized in that: Includes a pump wheel (8) and a turbine (9) as described in any one of claims 1 to 3, wherein the turbine (9) includes a volute (10) and a fluid delivery channel (11) is provided inside the volute (10), and the inlet of the fluid delivery channel (11) is opposite to the outlet of the fluid supply channel (3).

5. The hydraulic torque converter as described in claim 4, characterized in that: The hydraulic torque converter also includes a guide wheel (12), which has a liquid guiding channel (13) inside. The inlet of the liquid guiding channel (13) and the outlet of the liquid supply channel (11) are opposite to each other, and the outlet of the liquid guiding channel (13) and the inlet of the liquid supply channel (3) are opposite to each other.

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