A hydraulic coupler for a diesel engine lubricating oil level regulating system

Abstract

The present invention provides a hydraulic coupling for a diesel engine lubricating oil level regulating system, comprising a housing, a pump impeller rotatably mounted on one side of the housing, and a turbine rotatably mounted on the other side of the housing. The turbine and pump impeller are coaxially arranged, and the turbine is rotatably mounted on the housing via a driven shaft. The driven shaft is provided with an oil inlet hole, the length of which is the same as that of the driven shaft. The pump impeller is provided with a receiving groove connected to the oil inlet hole at a position corresponding to the driven shaft, and the pump impeller is provided with an oil guide hole for connecting the receiving groove with the impeller chamber at a position corresponding to each impeller chamber. The pump impeller is provided with an oil collecting cover on the side facing the turbine, and the other side is rotatably mounted on the housing via a driving shaft. The hydraulic coupling for a diesel engine lubricating oil level regulating system described in the present invention has the advantages of a simple structure and adaptive speed change.

Description

Technical Field

[0001] The invention belongs to the field of diesel engines, and in particular relates to a hydraulic coupler for a diesel engine lubricating oil level regulating system. Background Art

[0002] The diesel engine lubricating oil level control system uses the charge pump in the lubricating oil level control pump to draw oil from the oil tank during engine operation, delivering it to the oil pan through a check valve and oil pipe, thereby filling the diesel engine. The oil pump in the oil level control pump removes excess oil from the oil pan through the oil pipe and returns it to the oil tank through a pressure-maintaining valve with a throttle. The oil level in the oil pan is determined by the immersion depth of the oil pipe. The oil supply flow rate of the charge pump is less than the oil pump flow rate, which prevents the oil level in the oil pan from rising too high and ensures dynamic oil balance.

[0003] The oil supply flow of the oil charge pump is smaller than the oil extraction pump flow. In addition, in some cases, such as when the marine diesel engine is in a tilted state for a period of time, the oil extraction pump will idle without oil. If the time is long, the friction heat of the oil extraction pump cannot be carried away by the lubricating oil, generating high temperature. At the same time, the moving parts lack lubrication and wear is aggravated, resulting in abnormal wear and even damage.

[0004] Application No. 202210737782.1 discloses an adaptive speed diesel engine lubricating oil level control system. It includes an oil level control pump, a pipeline from the oil tank to the charge pump, a pipeline from the charge pump to the diesel engine, a hydraulic coupling, a pipeline from the hydraulic coupling to the oil extraction pump, a pipeline from the main oil gallery to the hydraulic coupling, a throttle valve, a pipeline from the oil extraction pump to the oil tank, a pressure-maintaining valve, a check valve, a pipeline from the diesel engine to the hydraulic coupling, the oil extraction pump, the charge pump, the diesel engine, and the oil tank. While this technology conceptually forms a system solution, it does not address the specific structure and motion of the hydraulic coupling, necessitating a solution to address the specific working process of the hydraulic coupling. Summary of the Invention

[0005] In view of this, the present invention aims to provide a hydraulic coupling for a diesel engine lubricating oil level regulating system to solve the problem that the existing hydraulic coupling has poor effect when applied to the diesel engine lubricating oil level regulating system.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A hydraulic coupling for a diesel engine lubricating oil level regulating system comprises a housing, a pump impeller rotatably mounted on one side of the housing, and a turbine rotatably mounted on the other side of the housing. The turbine and the pump impeller are coaxially arranged, and the turbine is rotatably mounted on the housing via a driven shaft.

[0008] An oil inlet is provided on the driven shaft, and the length direction of the oil inlet is the same as the length direction of the driven shaft; a accommodating groove connected to the oil inlet is provided at a position corresponding to the driven shaft on the pump wheel, and an oil guide hole for connecting the accommodating groove and the impeller chamber is provided at a position corresponding to each impeller chamber on the pump wheel; an oil collecting cover is provided on the side of the pump wheel facing the turbine, and the other side is rotatably mounted on the outer shell through the driving shaft, and an accommodating chamber for facilitating the rotation of the turbine is formed between the oil collecting cover and the pump wheel; an oil outlet is provided on the side of the oil collecting cover facing the pump wheel, which is connected to the accommodating chamber, and an assembly hole matching the driven shaft is provided on the other side, and the assembly hole is connected to the accommodating chamber, and an oil outlet pipe is provided at the position corresponding to the oil outlet hole on the outer shell.

[0009] Furthermore, the driven shaft is provided with a protrusion at one end facing the pump wheel and matched with the accommodating groove.

[0010] Furthermore, a recessed portion is provided on the side wall of the accommodating groove at a position corresponding to the oil guide hole.

[0011] Furthermore, the oil collecting cover is fixed to the pump wheel by bolts, and a plurality of mounting holes for mounting the bolts are evenly provided around the pump wheel.

[0012] Furthermore, the oil collecting hood is a dome-shaped structural member.

[0013] Furthermore, the diameter of the assembly hole is larger than the diameter of the driven shaft.

[0014] Compared with the prior art, the hydraulic coupling for a diesel engine lubricating oil level regulating system according to the present invention has the following advantages:

[0015] The hydraulic coupling for a diesel engine lubricating oil level regulation system disclosed herein has the advantages of a simple structure and adaptive speed change. By providing an oil inlet hole on the turbine's driven shaft, engine oil can enter the impeller chamber through the oil inlet hole and the oil guide hole. Due to the operation of the oil pump, a certain negative pressure is generated throughout the hydraulic coupling. This allows the oil to flow out through the oil outlet hole or assembly hole and then into the oil pump through the oil outlet pipe, replenishing the oil in the oil pump and preventing the pump from idling due to lack of oil.

[0016] The hydraulic coupling for a diesel engine lubricating oil level regulation system described in the present invention can also adaptively change speed according to the oil level. By arranging an oil collecting cover on the pump wheel and arranging a high oil level assembly hole and a low oil level oil outlet hole on the oil collecting cover, when oil is sucked in, the oil level in the hydraulic coupling rises and the turbine output speed increases. When the oil level exceeds the assembly hole position, excess oil will flow out of the assembly hole so that the liquid level no longer rises; and when no oil can be sucked into the oil pan again, the oil level will gradually decrease from the assembly hole position to the oil outlet hole position, and the turbine output speed will gradually decrease, thereby realizing the speed regulation of the turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 The figure is a schematic diagram of the principle of a hydraulic coupling for a diesel engine lubricating oil level regulating system according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1. Oil inlet hole; 2. Oil guide hole; 3. Oil outlet hole; 4. Assembly hole; 5. Oil outlet pipe; 6. Pump wheel; 7. Turbine; 8. Driving shaft; 9. Casing; 10. Driven shaft; 11. Receiving groove; 12. Impeller chamber; 13. Oil collecting cover. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0022] A hydraulic coupling for a diesel engine lubricating oil level regulating system, such as Figure 1 As shown, it includes a casing 9, a pump wheel 6 rotatably mounted on one side of the casing 9, and a turbine 7 rotatably mounted on the other side of the casing 9. The turbine 7 and the pump wheel 6 are coaxially arranged, and the turbine 7 is rotatably mounted on the casing 9 through a driven shaft 10. The driven shaft 10 is provided with an oil inlet hole 1, and the length direction of the oil inlet hole 1 is the same as the length direction of the driven shaft 10; the position of the pump wheel 6 corresponding to the driven shaft 10 is provided with a receiving groove 11 connected to the oil inlet hole 1, and the position of each impeller chamber 12 on the pump wheel 6 is provided with an oil guide hole 2 for connecting the receiving groove 11 with the impeller chamber 12.

[0023] Exemplarily, the turbine 7 and the pump wheel 6 can both adopt the impellers used on the existing hydraulic coupling. The turbine 7 and the pump wheel 6 can cooperate to form a plurality of impeller chambers 12. By setting a receiving groove 11 connected to the oil inlet hole 1 at a position corresponding to the driven shaft 10 on the pump wheel 6, when the pump wheel 6 rotates, the oil can enter the receiving groove 11 through the oil inlet hole 1, and enter the impeller chamber 12 through the oil guide hole 2 under the action of centrifugal force, and then enter the outer casing 9 through the gap between the pump wheel 6 and the turbine 7.

[0024] The impeller 6 is provided with an oil collecting cover 13 on the side facing the turbine 7, and the other side is rotatably mounted on the housing 9 via the driving shaft 8. A housing cavity is formed between the oil collecting cover 13 and the impeller 6 to facilitate the rotation of the turbine 7. The oil collecting cover 13 is provided with an oil outlet 3 connected to the housing cavity on the side facing the impeller 6, and an assembly hole 4 that cooperates with the driven shaft 10 on the other side. The assembly hole 4 is connected to the housing cavity, and an oil outlet pipe 5 is provided on the housing 9 at a position corresponding to the oil outlet hole 3. The oil outlet pipe 5 is provided below the housing 9, and the oil outlet holes 3 can be evenly arranged in four, six, or more positions along the circumference of the oil collecting cover 13. Those skilled in the art can make their own selections based on actual needs.

[0025] For example, shaft holes for installing the driving shaft 8 and the driven shaft 10 can be provided on the housing 9, and rotating seals or bearings can also be provided at the positions corresponding to the shaft holes. Those skilled in the art can also choose a suitable installation method to install the turbine 7 and the impeller 6 according to actual needs, which will not be repeated here.

[0026] In actual application, the oil collecting cover 13 can be fixed to the impeller 6 by bolts, and a plurality of mounting holes for mounting bolts are evenly arranged around the impeller 6. Specifically, four, six or more bolts and mounting holes can be provided correspondingly. Generally, a housing for assembling the turbine 7 is mounted on the impeller 6 by bolts. In this embodiment, the turbine 7 is mounted on the housing 9 and the oil collecting cover 13 is mounted on the impeller 6, which is conducive to adjusting the speed of the turbine 7 according to the oil level. Specifically, those skilled in the art can also select an appropriate number of bolts to install the oil collecting cover 13 according to actual needs to achieve stable assembly of the oil collecting cover 13 on the impeller 6, which will not be repeated here.

[0027] In an optional embodiment, a seal is provided between the oil collecting cover 13 and the impeller 6. The seal can be a sealing strip or a sealing ring, and grooves for the seal can be provided around the periphery of the impeller 6. The seal improves the sealing effect between the oil collecting cover 13 and the impeller 6, prevents oil leakage between the oil collecting cover 13 and the impeller 6, and ensures that the impeller 6 drives the turbine 7.

[0028] In actual use, the oil collecting hood 13 is a dome-shaped structural component, and the diameter of the mounting hole 4 is larger than the diameter of the driven shaft 10. This dome-shaped structure provides greater structural strength and stability, making it less susceptible to deformation during the rotation of the impeller 6. This ensures a constant oil clearance between the oil collecting hood 13 and the turbine 7, allowing oil to flow through the clearance and out of the mounting hole 4 or the oil outlet 3. By setting the diameter of the mounting hole 4 larger than the diameter of the driven shaft 10, the mounting hole 4 provides a good overflow function, allowing excess oil to flow out of the oil collecting hood 13.

[0029] Optionally, the driven shaft 10 is provided with a protrusion at one end facing the pump wheel 6, which cooperates with the receiving groove 11. The cooperation between the protrusion and the receiving groove 11 facilitates the oil to enter the receiving groove 11 more conveniently through the oil inlet hole 1.

[0030] Optionally, a recessed portion is provided on the side wall of the receiving groove 11 at a position corresponding to the oil guide hole 2. The recessed portion is conducive to the convergence of the oil, so that the oil can enter the oil guide hole 2 more conveniently.

[0031] In actual use, the hydraulic coupling described in this embodiment is a speed-regulating type, meaning its speed is adjusted by the amount of working oil within the impeller chambers 12 of the pump impeller 6 and turbine 7. The oil inlet 1 contains oil from the diesel engine's main oil gallery and oil sump. The oil outlet pipe 5 can be connected to the oil circuit of an oil pump. The operation of the oil pump creates a certain negative pressure throughout the hydraulic coupling. The oil enters the working chambers of the turbine 7 and pump impeller 6 through the oil guide hole 2, transmitting torque. An oil outlet hole 3 is provided in the oil collecting cover 13 to maintain a certain oil level and allow the oil to flow out from between the turbine 7 and pump impeller 6.

[0032] This type of hydraulic coupling is primarily used in diesel engines used in constant-speed generator sets. In actual use, the oil flow rate from oil outlet 3 must be slightly higher than the flow rate from the main oil gallery. When the oil pan is unable to draw oil, the oil level remains at oil outlet 3. When oil is drawn into the oil pan, the oil level in the coupler rises, increasing the output speed of turbine 7. When the oil level exceeds assembly hole 4, excess oil flows out of assembly hole 4, preventing the level from rising. When the oil pan again fails to draw oil, the oil level gradually drops from assembly hole 4 to oil outlet 3, gradually reducing the output speed of turbine 7 and thus achieving speed regulation of turbine 7.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic coupling for a diesel engine lubricating oil level regulating system, comprising a housing, a pump impeller rotatably mounted on one side of the housing, and a turbine rotatably mounted on the other side of the housing, the turbine and pump impeller being coaxially arranged, the turbine being rotatably mounted on the housing via a driven shaft, characterized in that: An oil inlet hole is provided on the driven shaft, and the length direction of the oil inlet hole is the same as the length direction of the driven shaft; a receiving groove connected to the oil inlet hole is provided at a position corresponding to the driven shaft on the pump wheel, and an oil guide hole for connecting the receiving groove and the impeller chamber is provided at a position corresponding to each impeller chamber on the pump wheel, wherein the hydraulic coupling adjusts the speed by the amount of working oil in the impeller chamber of the pump wheel and the turbine; an oil collecting cover is provided on the side of the pump wheel facing the turbine, and the other side is rotatably mounted on the outer casing through the driving shaft, and a receiving chamber for facilitating the rotation of the turbine is formed between the oil collecting cover and the pump wheel; an oil outlet hole connected to the receiving chamber is provided on the side of the oil collecting cover facing the pump wheel, and an assembly matched with the driven shaft is provided on the other side. The oil pump is operated by a motor, and the oil level is adjusted accordingly. The oil pump is operated by a motor, and the oil level is adjusted accordingly.

2. The hydraulic coupling for a diesel engine lubricating oil level regulating system according to claim 1, characterized in that: The driven shaft is provided with a protrusion matched with the accommodating groove at one end facing the pump wheel.

3. A hydraulic coupling for a diesel engine lubricating oil level regulating system according to claim 1 or 2, characterized in that: A recessed portion is provided on the side wall of the accommodating groove at a position corresponding to the oil guide hole.

4. The hydraulic coupling for a diesel engine lubricating oil level regulating system according to claim 1, characterized in that: The oil collecting cover is fixed on the pump wheel by bolts, and a plurality of mounting holes for mounting bolts are evenly arranged around the pump wheel.

5. The hydraulic coupling for a diesel engine lubricating oil level regulating system according to claim 1, characterized in that: The oil collecting cover is a dome-shaped structural component.

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