Large-torque centrifugal hydraulic torque converter

Abstract

The invention relates to a hydraulic torque converter, and provides a large-torque centrifugal hydraulic torque converter in order to solve the problems that the torque amount of an existing centripetal hydraulic torque converter cannot meet the starting torque required by large equipment, the structure is complex, the assembly difficulty is large and the like, and the large-torque centrifugal hydraulic torque converter comprises a guide wheel shell and a turbine shell which are connected with an input shaft and an output shaft through bearings respectively. The guide wheel shell and the turbine shell are mutually connected to form a shell of the hydraulic torque converter; the guide wheel and the pump wheel are coaxially arranged on the outer side of the input shaft in a sleeving mode, the turbine is coaxially arranged on the output shaft in a sleeving mode, the guide wheel is fixed to a guide wheel shell, and the pump wheel is connected with the input shaft through first end face teeth; the turbine is connected with the output shaft through the second end face teeth. A pump wheel mounting groove is formed in the turbine, the outlet end of the pump wheel is mounted in the pump wheel mounting groove in an embedded manner, and a gap exists between the pump wheel and the turbine; bearings are arranged at the connecting end between the input shaft and the output shaft, the connecting end between the guide wheel shell and the input shaft and the connecting end between the turbine shell and the output shaft.

Description

Technical Field

[0001] The invention relates to a hydraulic torque converter, in particular to a large-torque centrifugal hydraulic torque converter. Background Art

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

[0003] The torque converters of some large-scale equipment in industries such as large-scale mining equipment and railway tunnels usually require a large starting torque due to their excessive external loads. Some starting torque requirements are as high as 5000Nm or more. However, the torque ratio of the existing centripetal torque converters within a 380-cycle circle is 2-3, and the MP2000 is about 1000NM. The maximum torque that can be provided when the engine speed is 2000 rpm is 3000Nm, which cannot meet the starting requirements of the equipment. At the same time, the structure of the centripetal torque converter is complex and difficult to assemble. It is easy to cause damage to internal seals and splines during the assembly process, resulting in serious waste of resources.

[0004] Therefore, it is necessary to design a hydraulic torque converter structure that can provide a larger torque to meet the equipment startup requirements. Summary of the invention

[0005] The purpose of the present invention is to solve the problems that the torque provided by the existing centrifugal hydraulic torque converter within a circulation circle of less than 380 degrees cannot meet the starting torque required by large equipment, and the structure is complex and the assembly is difficult, and a large torque centrifugal hydraulic torque converter is proposed.

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

[0007] A large torque centrifugal hydraulic torque converter, comprising a coaxially connected input shaft and an output shaft, wherein the input shaft is connected to an engine, and the output shaft is connected to a transmission, and the special feature of the converter is that the converter comprises a guide wheel housing and a turbine housing respectively connected to the input shaft and the output shaft through bearings, the guide wheel housing and the turbine housing are connected to each other to form a housing of the hydraulic torque converter, wherein the guide wheel housing is arranged on one side of the input shaft, and the turbine housing is arranged on one side of the output shaft;

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

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

[0010] The pump wheel is connected to the input shaft through the first end face gear and the connecting gear on the input shaft;

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

[0012] The turbine is provided with a pump wheel installation groove, the outlet end of the pump wheel is embedded in the pump wheel installation groove, and a gap is provided 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 the oil loss between the guide wheel and the pump wheel.

[0014] Further, the pump wheel is connected to the input shaft through the first end face teeth and bolts;

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

[0017] Furthermore, a first skeleton oil seal is provided at a position near the bearing at the rear end of the input shaft;

[0018] A second skeleton oil seal is arranged at the front end of the output shaft near the bearing;

[0019] The first skeleton oil seal and the second skeleton oil seal are both used to seal the torque converter cavity to prevent oil leakage.

[0020] 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;

[0021] The bearing is a tapered roller bearing.

[0022] Furthermore, the gap size between the pump wheel and the turbine is 1-1.5 mm.

[0023] 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.

[0024] Furthermore, an engine mounting groove is provided at the rear end of the input shaft, and an internal spline matching the engine connecting end is provided on the inner surface of the engine mounting groove.

[0025] Furthermore, an external spline matching the transmission case connection end is provided on the outer surface of the front end of the output shaft.

[0026] Beneficial effects of the present invention:

[0027] [1] The high-torque centrifugal hydraulic torque converter of the present invention has a simple structure and is easy to process. The guide wheel housing, guide wheel, pump wheel, turbine and turbine housing are assembled into a centrifugal hydraulic torque converter in a forward-to-backward order. Compared with the centrifugal hydraulic torque converter, the centrifugal hydraulic torque converter has a more significant torque conversion performance. 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 centrifugal hydraulic torque converter, which can meet the larger starting torque required for starting large equipment.

[0028] [2] The present invention designs skeleton oil seals on the input shaft and output shaft of the centrifugal torque converter, so that the torque converter forms an independent module, which can save the seal design of the user's shaft end and reduce the design difficulty of the user's end parts. It has strong practicality and applicability, and effectively saves production resources and human resources.

[0029] [3] The centrifugal torque converter of the present invention has the oil inlet and outlet ports respectively designed on the guide wheel housing and the turbine housing, so that the oil inlet and outlet channels can be directly connected to the outer casing of the torque converter through oil pipes, and the 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 perform fault inspection and repair on the oil circuit, and has strong practicality.

[0030] [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 structural parts, eliminates the guide wheel seat parts, reduces the production cost, and saves the space structure of the hydraulic torque converter.

[0031] [5] The centrifugal hydraulic torque converter of the present invention adds an oil guide tongue at the outlet end of the guide wheel, and 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, thereby improving the transmission efficiency of the hydraulic torque converter.

[0032] [6] The centrifugal hydraulic torque converter of the present invention is connected to the engine through the internal splines on the input shaft, and the output shaft is connected to the gearbox. It can achieve power transmission through only one set of splines, which effectively reduces the difficulty of assembly, reduces the damage rate of accessories during the assembly process, and effectively saves production resources and production costs.

[0033] [7] The centrifugal torque converter of the present invention is connected between the input shaft and the pump wheel, and between the output shaft and the turbine by end face teeth, which not only meets the system's demand for transmitting large torque, but also improves the axial and radial self-centering performance of the device, effectively improving the stability and reliability of the device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an embodiment of a high-torque centrifugal hydraulic torque converter of the present invention;

[0035] Figure 2This is a schematic diagram of the structure of the connection between the pump wheel and the turbine in an embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the structure of the first end face gear in an embodiment of the present invention;

[0037] Reference numerals:

[0038] 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 groove, 12-second skeleton oil seal, 13-output shaft, 14-oil guide tongue, 15-first end face tooth, 16-second end face tooth. DETAILED DESCRIPTION

[0039] like Figure 1 As shown, a large torque centrifugal hydraulic torque converter comprises an input shaft 1 and an output shaft 13 connected coaxially, and a guide wheel housing 5 and a turbine housing 7 connected to the input shaft 1 and the output shaft 13 respectively through a bearing 3, the guide wheel housing 5 and the turbine housing 7 are connected to each other to form a housing of the hydraulic torque converter, wherein the guide wheel housing 5 is arranged on one side of the input shaft 1, and the turbine housing 7 is arranged on one side of the output shaft 13; the guide wheel 6 and the pump wheel 9 are coaxially sleeved on the outer side of the input shaft 1 from back to front in the housing, and the turbine 8 is coaxially sleeved on the output shaft 13;

[0040] A tapered roller bearing 3 is provided on the connection end between the input shaft 1 and the output shaft 13 .

[0041] The input shaft 1 is connected to the engine, and an engine mounting groove is provided at the rear end of the input shaft 1. An internal spline matching the engine connection end is provided on the inner surface of the engine mounting groove; the rear end of the output shaft 13 is connected to the transmission, and an external spline matching the transmission connection end is provided on the outer surface of the front end of the output shaft 13;

[0042] 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, which are used to bear the axial force and radial force inside the torque converter; a first skeleton oil seal 2 is provided at the position near the tapered roller bearing 3 at the rear end of the input shaft 1; the guide wheel 6 is fixed to the guide wheel housing 5 by bolts, an oil guide tongue 14 is provided at the outlet of the guide wheel 6, and an oil guide tongue mounting groove is provided on the guide wheel housing 5. The oil guide tongue 14 is adapted to be installed in the oil guide tongue mounting groove, which is used to reduce the oil loss between the guide wheel 6 and the pump wheel 9, and improve the overall working efficiency of the hydraulic torque converter;

[0043] like Figure 3As shown, the pump wheel 9 is connected to the input shaft 1 through the first end face teeth and bolts, the turbine 8 is connected to the output shaft 13 through the second end face teeth and bolts, and a tapered roller bearing 3 and a sealing device are also provided on the connecting end of 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; the first skeleton oil seal 2 and the second skeleton oil seal 12 are both used to seal the torque converter cavity to prevent oil leakage, which can save the structural design at the user end and improve the practicality and applicability of the centrifugal torque converter; the centrifugal torque converter is supported by three sets of tapered roller bearings inside, which can effectively improve its stability and reliability.

[0044] like Figure 2 As shown, a pump wheel mounting groove is provided on the turbine 8, 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 torque converter, forming a centrifugal torque converter structure; there are three sets of tapered roller bearings inside the centrifugal torque converter as support.

[0045] The oil power transmission process in the centrifugal 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 teeth 15 and the bolts, the pump wheel 9 drives the oil to flow to the turbine 8 and the guide wheel 6 in turn, and then returns to the pump wheel 9 to realize the torque conversion and torque increase function, the turbine 8 drives the output shaft 13 to rotate through the second end face teeth 16 and the bolts to realize power output.

Claims

1. A high-torque centrifugal hydraulic torque converter, comprising an input shaft (1) and an output shaft (13) connected coaxially, wherein the input shaft (1) is connected to an engine, and the output shaft (13) is connected to a transmission, characterized in that: The invention comprises a guide wheel housing (5) and a turbine housing (7) respectively connected to an input shaft (1) and an output shaft (13) via a bearing (3), wherein the guide wheel housing (5) and the turbine housing (7) are connected to each other to form a housing of a hydraulic torque converter, wherein the guide wheel housing (5) is arranged on one side of the input shaft (1), and the turbine housing (7) is arranged on one side of the output shaft (13); It also includes a guide wheel (6) and a pump wheel (9) which are coaxially sleeved on the outside of the input shaft (1) from back to front and located in the housing, and a turbine wheel (8) which is coaxially sleeved on the output shaft (13); The guide wheel (6) is fixed on the guide wheel housing (5); the pump wheel (9) is connected to the input shaft (1) via the first end face teeth (15) and the connecting teeth on the input shaft (1); The turbine (8) is connected to the output shaft (13) via the second end face gear (16) and the connecting gear on the output shaft (13); The turbine (8) is provided with a pump wheel installation groove, the outlet end of the pump wheel (9) is embedded in the pump wheel installation groove, and a gap (10) exists between the pump wheel (9) and the turbine (8).

2. A high torque centrifugal hydraulic torque converter according to claim 1, characterized in that: 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 adapted to be mounted in the oil guide tongue mounting groove to reduce oil loss between the guide wheel (6) and the pump wheel (9).

3. A high torque centrifugal hydraulic torque converter according to claim 1 or 2, characterized in that: The pump wheel (9) is connected to the input shaft (1) via a first end face tooth (15) and bolts; The turbine (8) is connected to the output shaft (13) via a second end face gear (16) and bolts.

4. A high torque centrifugal hydraulic torque converter according to claim 3, characterized in that: A first skeleton oil seal (2) is provided at a position close to the bearing (3) at the rear end of the input shaft (1); A second skeleton oil seal (12) is provided at the front end of the output shaft (13) near the bearing (2); The first skeleton oil seal (2) and the second skeleton oil seal (12) are both used to seal the torque converter cavity to prevent oil leakage.

5. A high torque centrifugal hydraulic torque converter according to claim 4, characterized in that: Bearings (3) are provided on the connection 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 (3) is a tapered roller bearing.

6. A high torque centrifugal hydraulic torque converter according to claim 5, characterized in that: The size of the gap (10) between the pump wheel (9) and the turbine wheel (8) is 1-1.5 mm.

7. A high torque centrifugal hydraulic torque converter according to claim 6, characterized in that: Sealing devices (4) are provided at the connection points between the guide wheel housing (5) and the input shaft (1), and between the turbine housing (7) and the output shaft (13).

8. A high torque centrifugal hydraulic torque converter according to claim 7, characterized in that: An engine mounting groove (11) is provided at the rear end of the input shaft (1), and an internal spline matching 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: An external spline matching the connecting end of the gearbox is arranged on the outer surface of the front end of the output shaft (13).

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