A large torque centrifugal hydrodynamic torque converter

Abstract

The present application relates to a hydraulic torque converter, to solve the problem that the torque of the existing centrifugal hydraulic torque converter cannot meet the required starting torque of large equipment, and the structure is complex and difficult to assemble, a large torque centrifugal hydraulic torque converter is provided, which comprises a guide wheel shell and a turbine shell connected with an input shaft and an output shaft respectively through bearings, and the guide wheel shell and the turbine shell are connected with each other to form the shell of the hydraulic torque converter; the guide wheel, the pump wheel and the turbine are coaxially sleeved outside the input shaft, the output shaft and the input shaft respectively in the shell; the guide wheel is fixed on the guide wheel shell, the pump wheel is connected with the input shaft through the first end face tooth; the turbine is connected with the output shaft through the second end face tooth; the turbine is provided with a pump wheel mounting groove, the outlet end of the pump wheel is embeddedly mounted in the pump wheel mounting groove, and there is a gap between the pump wheel and the turbine; bearings are arranged on the connecting ends between the input shaft and the output shaft, the guide wheel shell and the input shaft, and the turbine shell and the output shaft.

Description

Technical Field

[0001] This invention relates to hydraulic torque converters, and more specifically to a high-torque centrifugal hydraulic torque converter. Background Technology

[0002] A hydraulic torque converter is a flexible transmission hydraulic element that uses liquid as the working medium and consists of a pump wheel, a turbine, and a guide wheel. The hydraulic torque converter is installed at the output end of the power source and has the functions of torque conversion, speed conversion, and clutch engagement, playing a crucial role in the entire transmission system.

[0003] Large hydraulic torque converters in industries such as mining and railway tunnels often require high starting torque due to their heavy external loads, sometimes exceeding 5000 Nm. However, existing centripetal hydraulic torque converters with a torque ratio of 2-3 (around 1000 Nm for the MP2000) within a 380-degree rotation circle cannot meet the starting requirements. Furthermore, centripetal hydraulic torque converters have complex structures and are difficult to assemble, which can easily damage internal seals and splines, resulting in significant resource waste.

[0004] Therefore, it is necessary to design a hydraulic torque converter structure that can provide a large torque to meet the equipment start-up requirements. Summary of the Invention

[0005] The purpose of this invention is to solve the problems that the torque provided by existing centrifugal hydraulic torque converters within a 380-degree circulation circle cannot meet the starting torque required by large equipment, as well as the problems of complex structure and difficult assembly. Therefore, a high-torque centrifugal hydraulic torque converter is proposed.

[0006] To achieve the above objectives, the technical solution proposed by this invention is as follows:

[0007] A high-torque centrifugal hydraulic torque converter includes an input shaft and an output shaft coaxially connected. The input shaft is connected to an engine, and the output shaft is connected to a transmission. The converter is characterized by including a guide wheel housing and a turbine housing connected to the input shaft and the output shaft respectively via bearings. The guide wheel housing and the turbine housing are interconnected to form the outer shell of the hydraulic torque converter. The guide wheel housing is located on the input shaft side, and the turbine housing is located on the output shaft side.

[0008] It also includes a guide wheel and a pump wheel located inside the housing and coaxially sleeved from back to front on the outside of the input shaft, as well as a turbine coaxially sleeved on the output shaft;

[0009] The guide wheel is fixed to the guide wheel housing;

[0010] The pump wheel is connected to the input shaft via the first end face teeth and the connecting teeth on the input shaft.

[0011] The turbine is connected to the output shaft via the second end face teeth and the connecting teeth on the output shaft.

[0012] The turbine is provided with a pump wheel mounting groove, the outlet end of the pump wheel is embedded in the pump wheel mounting groove, and there is a gap between the pump wheel and the turbine.

[0013] Furthermore, an oil guide tongue is provided at the outlet of the guide wheel, and an oil guide tongue mounting groove is provided on the guide wheel housing. The oil guide tongue is adapted to be installed in the oil guide tongue mounting groove to reduce oil loss between the guide wheel and the pump wheel.

[0014] Furthermore, the pump wheel is connected to the input shaft via a first end face tooth and bolts;

[0015] The turbine is connected to the output shaft via a second end face tooth and bolts.

[0016] Furthermore, a first skeleton oil seal is provided at the rear end of the input shaft near the bearing;

[0017] A second skeleton oil seal is provided at the front end of the output shaft near the bearing;

[0018] Both the first and second skeleton oil seals are used to seal the hydraulic torque converter cavity to prevent oil leakage.

[0019] Furthermore, bearings are provided on the connection ends between the input shaft and the output shaft, the guide wheel housing and the input shaft, and the turbine housing and the output shaft;

[0020] The bearing is a tapered roller bearing.

[0021] Furthermore, the gap between the pump impeller and the turbine is 1-1.5 mm.

[0022] Furthermore, sealing devices are provided at the connection points between the guide wheel housing and the input shaft, and between the turbine housing and the output shaft.

[0023] Furthermore, the rear end of the input shaft is provided with an engine mounting groove, and the inner surface of the engine mounting groove is provided with an internal spline that is compatible with the engine connection end.

[0024] Furthermore, an external spline adapted to the gearbox connection end is provided on the outer surface of the front end of the output shaft.

[0025] The beneficial effects of this invention are:

[0026] [1] The high-torque centrifugal hydraulic torque converter of the present invention has a simple structure and is easy to process. By assembling the guide wheel housing, guide wheel, pump wheel, turbine and turbine housing in the order from front to back, the centrifugal hydraulic torque converter has a more significant torque conversion performance than the centripetal hydraulic torque converter. Under the same circulation circle, it can provide a larger torque for the whole machine. The torque conversion ratio is significantly better than that of the traditional centripetal hydraulic torque converter, which can meet the large starting torque required when starting large equipment.

[0027] [2] The present invention designs skeleton oil seals on both the input shaft and the output shaft of the centrifugal hydraulic torque converter, so that the hydraulic torque converter forms an independent module, which can eliminate the need for sealing design at the user shaft end, reduce the design difficulty of user end parts, and has strong practicality and applicability, effectively saving production resources and human resources.

[0028] [3] The centrifugal hydraulic torque converter of the present invention has the oil inlet and outlet ports designed on the guide wheel housing and the turbine housing respectively, which can make the oil inlet and outlet circuits directly connected to the outer shell of the hydraulic torque converter through oil pipes. Moreover, its internal oil circuit structure is simple and smooth, which is conducive to the measurement and installation of external oil temperature and oil pressure sensors. It is also convenient for staff to troubleshoot oil circuit faults, and it is highly practical.

[0029] [4] The guide wheel on the centrifugal hydraulic torque converter of the present invention is directly fixed on the guide wheel housing, which simplifies the guide wheel structure parts, eliminates the guide wheel seat parts, reduces production costs, and saves space in the hydraulic torque converter structure.

[0030] [5] The centrifugal hydraulic torque converter of the present invention adds an oil guide tongue at the outlet end of the guide wheel. The oil guide tongue is connected to the guide wheel through its profile extension section, which not only enhances the stability of the structure, but also reduces the oil loss between the guide wheel and the pump wheel, and improves the transmission efficiency of the hydraulic torque converter.

[0031] [6] The centrifugal hydraulic torque converter of the present invention is connected to the engine through the internal spline on the input shaft and to the gearbox through the output shaft. It can realize power transmission through only one set of splines, which effectively reduces the assembly difficulty, reduces the damage rate of parts during the assembly process, and effectively saves production resources and production costs.

[0032] [7] The centrifugal hydraulic torque converter of the present invention is connected by end face teeth between the input shaft and the pump wheel and between the output shaft and the turbine. This not only meets the requirements of the system to transmit large torque, but also improves the self-centering performance of the device in the axial and radial directions, and effectively improves the stability and reliability of the device structure. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an embodiment of a high-torque centrifugal hydraulic torque converter according to the present invention;

[0034] Figure 2This is a schematic diagram of the connection between the pump wheel and the turbine in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the first end face tooth in an embodiment of the present invention;

[0036] Figure label:

[0037] 1-Input shaft, 2-First skeleton oil seal, 3-Bearing, 4-Sealing device, 5-Guide wheel housing, 6-Guide wheel, 7-Turbine housing, 8-Turbine, 9-Pump wheel, 10-Gap, 11-Engine mounting slot, 12-Second skeleton oil seal, 13-Output shaft, 14-Oil guide tongue, 15-First end face tooth, 16-Second end face tooth. Detailed Implementation

[0038] like Figure 1 As shown, a high-torque centrifugal hydraulic torque converter includes an input shaft 1 and an output shaft 13 coaxially connected, and a guide wheel housing 5 and a turbine housing 7 connected to the input shaft 1 and the output shaft 13 respectively via bearings 3. The guide wheel housing 5 and the turbine housing 7 are interconnected to form the outer shell of the hydraulic torque converter, wherein the guide wheel housing 5 is located on one side of the input shaft 1, and the turbine housing 7 is located on one side of the output shaft 13; inside the outer shell, a guide wheel 6 and a pump wheel 9 are coaxially sleeved from back to front on the outside of the input shaft 1, and a turbine 8 is coaxially sleeved on the output shaft 13.

[0039] A tapered roller bearing 3 is provided on the connection end between the input shaft 1 and the output shaft 13.

[0040] The input shaft 1 is connected to the engine, and the rear end of the input shaft 1 is provided with an engine mounting groove. The inner surface of the engine mounting groove is provided with an internal spline that is compatible with the engine connection end. The rear end of the output shaft 13 is connected to the transmission, and the outer surface of the front end of the output shaft 13 is provided with an external spline that is compatible with the transmission connection end.

[0041] A tapered roller bearing 3 and a sealing device 4 are provided at the connection between the guide wheel housing 5 and the input shaft 1 to withstand the axial and radial forces inside the torque converter; a first skeleton oil seal 2 is provided at the rear end of the input shaft 1 near the tapered roller bearing 3; the guide wheel 6 is fixed to the guide wheel housing 5 by bolts, and an oil guide tongue 14 is provided at the outlet of the guide wheel 6. An oil guide tongue mounting groove is provided on the guide wheel housing 5, and the oil guide tongue 14 is fitted into the oil guide tongue mounting groove to reduce oil loss between the guide wheel 6 and the pump wheel 9 and improve the overall working efficiency of the hydraulic torque converter;

[0042] like Figure 3As shown, the pump wheel 9 is connected to the input shaft 1 via a first end face tooth and bolts, and the turbine 8 is connected to the output shaft 13 via a second end face tooth and bolts. A tapered roller bearing 3 and a sealing device are also provided at the connection end between the turbine housing 7 and the output shaft 13. A second skeleton oil seal 12 is provided at the front end of the output shaft 13 near the tapered roller bearing 3. Both the first skeleton oil seal 2 and the second skeleton oil seal 12 are used to seal the hydraulic torque converter cavity to prevent oil leakage, which can save on the structural design of the user end and improve the practicality and applicability of the centrifugal hydraulic torque converter. The centrifugal hydraulic torque converter is supported by three sets of tapered roller bearings, which can effectively improve its stability and reliability.

[0043] like Figure 2 As shown, the turbine 8 is provided with a pump wheel mounting groove, and the pump wheel 9 is embedded in the pump wheel mounting groove, and there is a gap 10 between the pump wheel 9 and the turbine 8; the size of the gap 10 between the two is 1-1.5mm; the guide wheel housing 5 and the turbine housing 7 are connected to each other by bolts to form the outer shell of the hydraulic torque converter, forming a centrifugal hydraulic torque converter structure; there are three sets of tapered roller bearings inside the centrifugal torque converter for support.

[0044] The oil power transmission process in the centrifugal hydraulic torque converter is as follows: the engine transmits power to the input shaft 1 through the spline pair. The input shaft 1 drives the pump wheel 9 to rotate through the first end face tooth 15 and the bolt. The pump wheel 9 drives the oil to flow to the turbine 8 and the guide wheel 6 in sequence, and then back to the pump wheel 9, realizing the torque conversion and torque increase function. The turbine 8 drives the output shaft 13 to rotate through the second end face tooth 16 and the bolt, realizing power output.

Claims

1. A large-torque centrifugal hydrodynamic torque converter comprising an input shaft (1) and an output shaft (13) connected coaxially, the input shaft (1) being connected to an engine and the output shaft (13) being connected to a transmission, characterized in that: The torque converter comprises a guide wheel housing (5) connected with the input shaft (1) through a first bearing and a turbine housing (7) connected with the output shaft (13) through a second bearing, the guide wheel housing (5) and the turbine housing (7) are connected with each other to form a housing of the torque converter, wherein the guide wheel housing (5) is arranged on the side of the input shaft (1) and the turbine housing (7) is arranged on the side of the output shaft (13); The torque converter further comprises a guide wheel (6), a pump wheel (9) and a turbine (8) coaxially sleeved on the outside of the input shaft (1) and the output shaft (13) respectively in the housing from back to front; The guide wheel (6) is fixed on the guide wheel housing (5); the pump wheel (9) is connected with the input shaft (1) through the first end face tooth (15) and the connecting tooth on the input shaft (1); The turbine (8) is connected with the output shaft (13) through the second end face tooth (16) and the connecting tooth on the output shaft (13); The turbine (8) is provided with a pump wheel mounting groove, the outlet end of the pump wheel (9) is embeddedly mounted in the pump wheel mounting groove, and there is a gap (10) between the pump wheel (9) and the turbine (8).

2. The large-torque centrifugal torque converter according to claim 1, wherein: An oil guide tongue (14) is arranged at the outlet of the guide wheel (6), the guide wheel housing (5) is provided with an oil guide tongue mounting groove, and the oil guide tongue (14) is adaptively mounted in the oil guide tongue mounting groove to reduce the oil loss between the guide wheel (6) and the pump wheel (9).

3. The large-torque centrifugal torque converter according to claim 1 or 2, wherein: The pump wheel (9) is connected with the input shaft (1) through the first end face tooth (15) and bolts; The turbine (8) is connected with the output shaft (13) through the second end face tooth (16) and bolts.

4. The large-torque centrifugal torque converter according to claim 3, wherein: A first skeleton oil seal (2) is arranged at the position close to the first bearing at the rear end of the input shaft (1); A second skeleton oil seal (12) is arranged at the position close to the second bearing at the front end of the output shaft (13); The first skeleton oil seal (2) and the second skeleton oil seal (12) are used for sealing the cavity of the torque converter to prevent the oil from leaking out.

5. The large-torque centrifugal torque converter according to claim 4, wherein: Bearings are arranged on the connecting ends between the input shaft (1) and the output shaft (13), the guide wheel housing (5) and the input shaft (1), and the turbine housing (7) and the output shaft (13). The bearing is a tapered roller bearing.

6. The large-torque centrifugal torque converter according to claim 5, wherein: The size of the gap (10) between the pump wheel (9) and the turbine (8) is 1-1.5 mm.

7. The large-torque centrifugal torque converter according to claim 6, wherein: Sealing devices (4) are arranged on the connecting parts of the guide wheel housing (5) and the input shaft (1) and the turbine housing (7) and the output shaft (13).

8. The large-torque centrifugal torque converter according to claim 7, wherein: The input shaft (1) has an engine mounting groove (11) at its rear end, and an internal spline adapted to the engine connection end is provided on the inner surface of the engine mounting groove (11).

9. A high-torque centrifugal hydraulic torque converter according to claim 8, characterized in that: The outer surface of the front end of the output shaft (13) is provided with an external spline that is compatible with the gearbox connection end.

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