Lubricating system for hybrid gearbox of agricultural machine

Abstract

The invention discloses a lubricating system for a hybrid gearbox of an agricultural machine. The lubricating system realizes comprehensive oil lubrication management of lubrication of the whole gearbox, and realizes fixed-point, quantitative and flow-controllable precise lubrication. Aiming at the characteristics that the special hybrid gearbox for the agricultural machine is large and long, the difference of internal parts is large, and the working conditions are changeable and complex, the arrangement of main and auxiliary oil ways is utilized, so that the internal oil management and fixed-point distribution are more accurate, reasonable and controllable. Aiming at real-time working conditions and lubrication requirements, high-low pressure conversion loop lubrication flow compensation is utilized, real-time controllable lubrication flow, low cost, high efficiency and good lubrication effect are achieved, and the comprehensive performance, safety and reliability of a transmission system are improved; in addition, the lubricating system of the agricultural machine hybrid gearbox has a constant temperature control function, a main oil way and an auxiliary oil way share a temperature control loop, the temperature of the gearbox is controlled within a required temperature interval according to the use requirement of the agricultural machine hybrid gearbox, the efficiency and reliability of the whole machine are further improved, and the lubricating system is suitable for industrial large-scale use and popularization.

Description

Technical Field

[0001] The present invention belongs to the field of transmissions, and in particular relates to a lubrication system for a hybrid transmission of an agricultural machine. Background Art

[0002] The special hybrid transmission for agricultural machinery is responsible for the tasks of towing, transporting, and hanging a variety of agricultural machinery and implements. The special hybrid transmission for agricultural machinery is a highly integrated electromechanical and hydraulic product. Due to the differentiated working conditions of internal components and the complex and changeable external working conditions, the differences in the heat dissipation and lubrication requirements of various components inside the transmission are greater than those of traditional transmissions.

[0003] Due to uneven pressure in the lubrication system of the hybrid transmission for agricultural machinery in the prior art, the parts that need to be lubricated cannot be fully lubricated, and the parts that are not fully lubricated may be at risk of excessive wear and ablation; in addition, due to the large temperature changes during vehicle operation, the uneven oil temperature of the lubricating oil can easily cause damage to the parts, and long-term use can easily affect the driving safety of the vehicle. Summary of the invention

[0004] The purpose of the present invention is to provide a hybrid transmission lubrication system for agricultural machinery to solve the problem of uneven pressure and temperature in the transmission lubrication system in the prior art, which affects the driving safety of the vehicle.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0006] A hybrid gearbox lubrication system for agricultural machinery, comprising an oil tank, a main tank and an auxiliary tank installed in the gearbox; the oil outlet of the oil tank is connected to the oil inlet of the auxiliary tank through a pipeline, and the oil outlet of the auxiliary tank is connected to the oil inlet of the main tank through a pipeline; it is characterized in that it also includes a double oil pump arranged inside the gearbox, and the oil outlet of the main tank is connected to the high-pressure oil inlet and the low-pressure oil inlet of the double oil pump through a high-pressure manifold pipeline and a low-pressure manifold pipeline respectively;

[0007] The low-pressure oil outlet of the double oil pump is connected to a low-pressure oil outlet pipeline, the low-pressure oil outlet pipeline is connected to the first end of the three-way temperature control valve, the second end of the three-way temperature control valve is connected to the oil inlet of the temperature controller, and the third end is connected to the low-pressure main channel; the oil outlet of the temperature controller is connected to one end of the low-pressure main channel;

[0008] The other end of the low-pressure main channel is divided into two paths, one of which is connected to the clutch shaft oil hole of the agricultural machinery hybrid gearbox through the first low-pressure branch, and the other is connected to the intermediate shaft oil hole and the input shaft oil hole of the agricultural machinery hybrid gearbox through the second low-pressure branch;

[0009] The high-pressure oil outlet of the dual oil pump is connected to the first end pipeline of the three-way pressure regulating valve, the second end of the three-way pressure regulating valve is connected to one end of the high-low pressure conversion branch pipeline, and the other end of the high-low pressure conversion branch pipeline is connected to the low-pressure main channel; the third end of the three-way pressure regulating valve is connected to the high-pressure main channel, and the high-pressure main channel is connected to the synchronizer shaft oil hole of the agricultural machinery hybrid gearbox;

[0010] The clutch shaft oil hole, intermediate shaft oil hole, input shaft oil hole and synchronizer shaft oil hole of the agricultural machinery hybrid gearbox are all provided with lubricating oil recovery pipelines, and all the lubricating oil recovery pipelines are connected to the oil inlet of the oil tank.

[0011] The present invention also has the following features:

[0012] Furthermore, a magnetic oil plug is provided inside the pipeline between the oil outlet of the oil tank and the oil inlet of the auxiliary tank;

[0013] A first filtering device is arranged at the oil inlet of the auxiliary tank.

[0014] Furthermore, a second filtering device is provided at the high-pressure oil outlet of the double oil pump.

[0015] Furthermore, a plurality of first throttle holes are axially provided on the clutch shaft oil hole of the agricultural machinery hybrid transmission.

[0016] Furthermore, the second low-pressure branch is connected to the intermediate shaft oil hole and the input shaft oil hole of the agricultural machinery hybrid transmission through the branch oil pipe;

[0017] A plurality of second throttle holes are axially provided on the branch oil pipe; positions of the plurality of second throttle holes correspond one-to-one to the high-position gears of the agricultural machinery hybrid transmission.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] The agricultural machinery hybrid transmission lubrication system of the present invention realizes comprehensive oil lubrication management of the entire transmission box, and realizes precise lubrication with fixed point, quantitative and controllable flow rate. In view of the large and long special transmission box for agricultural machinery hybrid, the internal parts are greatly differentiated, and the working conditions are changeable and complex. The main and auxiliary dual oil circuits are set to realize more accurate, reasonable and controllable fixed-point distribution of internal oil management. In view of the real-time working conditions and lubrication requirements, the high and low pressure conversion circuit lubrication flow compensation is used to realize real-time controllable lubrication flow, with low cost, high efficiency and good lubrication effect, which improves the comprehensive performance and safety and reliability of the transmission system.

[0020] In addition, the agricultural machinery hybrid transmission lubrication system of the present invention has a constant temperature control function, and the main and auxiliary dual oil circuits share a temperature control circuit. According to the use requirements of the agricultural machinery hybrid transmission, the transmission temperature is controlled within the required temperature range, further improving the efficiency and reliability of the entire machine, and is suitable for large-scale use and promotion in industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the double oil pump in the present invention;

[0022] Figure 2 It is a schematic diagram of the oil inlet structure of the main tank and the auxiliary tank in the present invention;

[0023] Figure 3 It is a schematic diagram of the main box oil inlet structure in the present invention;

[0024] Figure 4 It is a schematic diagram of the connection structure between the double oil pump and the temperature controller in the present invention;

[0025] Figure 5 It is a schematic diagram of the connection structure between the double oil pump and the clutch shaft oil hole in the present invention;

[0026] Figure 6 It is a schematic diagram of the connection structure between the double oil pump and the intermediate shaft oil hole and the input shaft oil hole in the present invention;

[0027] Figure 7 It is a schematic diagram of the high-low voltage conversion branch circuit structure in the present invention;

[0028] Figure 8 It is a schematic diagram of the connection structure between the high-pressure main channel and the synchronizer shaft oil hole in the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the magnetic oil plug in the present invention.

[0030] 1. Dual oil pump; 2. High-pressure manifold pipeline; 3. Low-pressure manifold pipeline; 4. Low-pressure oil outlet pipeline; 5. Three-way temperature control valve; 6. Temperature controller; 7. Low-pressure main channel; 8. First low-pressure branch; 9. Clutch shaft oil hole; 10. Second low-pressure branch; 11. Intermediate shaft oil hole; 12. Input shaft oil hole; 13. Three-way pressure regulating valve; 14. High-low pressure conversion manifold pipeline; 15. High-pressure main channel; 16. Synchronizer shaft oil hole; 17. Magnetic oil plug; 18. First filter device; 19. Second filter device; 20. Clutch shaft spline; 21. Clutch shaft bearing; 22. Intermediate shaft left bearing; 23. Intermediate shaft right bearing; 24. Input shaft left bearing; 25. Input shaft right bearing. DETAILED DESCRIPTION

[0031] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art. For example, the filter device is a known and commonly used filter device.

[0032] The components involved in the transmission of lubricating oil in the present invention are all connected by pipelines in the existing manner unless otherwise specified.

[0033] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0034] like Figure 1-7 As shown, a lubrication system for a hybrid gearbox of an agricultural machinery comprises an oil tank, a main tank and an auxiliary tank installed in the gearbox; the oil outlet of the oil tank is connected to the oil inlet of the auxiliary tank through a pipeline, and the oil outlet of the auxiliary tank is connected to the oil inlet of the main tank through a pipeline; it also comprises a double oil pump 1 arranged inside the gearbox, and the oil outlet of the main tank is connected to the high-pressure oil inlet and the low-pressure oil inlet of the double oil pump 1 through a high-pressure manifold pipeline 2 and a low-pressure manifold pipeline 3 respectively;

[0035] In the lubrication system of the hybrid transmission for agricultural machinery of the present invention, the oil circuit corresponding to the high-pressure oil inlet is used as the main oil circuit, and the oil circuit corresponding to the low-pressure oil inlet is used as the auxiliary oil circuit; in view of the characteristics of large and long hybrid transmissions for agricultural machinery, large differences in internal parts, and complex and changeable working conditions, the main and auxiliary dual oil circuits are set to achieve more accurate, reasonable and controllable fixed-point distribution of internal oil management.

[0036] The low-pressure oil outlet of the dual oil pump 1 is connected to a low-pressure oil outlet pipeline 4, which is connected to the first end of the three-way temperature control valve 5, the second end of the three-way temperature control valve 5 is connected to the oil inlet of the temperature controller 6, and the third end is connected to the low-pressure main channel 7; the oil outlet of the temperature controller 6 is connected to the low-pressure main channel 7. This arrangement enables the agricultural machinery hybrid gearbox lubrication system of the present invention to have a constant temperature control function. Since the final lubricating oil will be recovered by the lubricating oil recovery pipeline, the main and auxiliary dual oil circuits can share the temperature controller 6. According to the use requirements of the agricultural machinery hybrid gearbox, the gearbox temperature is controlled within the required temperature range, further improving the efficiency and reliability of the whole machine.

[0037] The low-pressure main channel 7 is divided into two paths, one of which is connected to the clutch shaft oil hole 9 of the agricultural machinery hybrid gearbox through the first low-pressure branch 8, and the other is connected to the intermediate shaft oil hole 11 and the input shaft oil hole 12 of the agricultural machinery hybrid gearbox through the second low-pressure branch 10. Then, the intermediate shaft left bearing 11 and the intermediate shaft right bearing 12 inside the intermediate shaft oil hole 11 are lubricated; the input shaft left bearing 24 and the input shaft right bearing 25 inside the input shaft oil hole 12 are lubricated.

[0038] The high-pressure oil outlet of the dual oil pump 1 is connected to the first end pipeline of the three-way pressure regulating valve 13, the second end of the three-way pressure regulating valve 13 is connected to one end of the high-low pressure conversion branch pipeline 14, and the other end of the high-low pressure conversion branch pipeline 14 is connected to the low-pressure main channel 7; the third end of the three-way pressure regulating valve 13 is connected to the high-pressure main channel 15, and the high-pressure main channel 15 is connected to the synchronizer shaft oil hole 16 of the agricultural machinery hybrid transmission; the above structure can be used as a high-low pressure conversion circuit, according to the real-time working conditions and lubrication requirements, the lubrication flow compensation of the high-low pressure conversion circuit is used to realize real-time controllable lubrication flow, low cost, high efficiency, good lubrication effect, and improve the comprehensive performance and safety and reliability of the transmission system;

[0039] Among them, the three-way pressure regulating valve 13 can adopt a known existing automatic pressure regulating valve, which is connected to the controller through conventional means in the field. The controller adopts a known commonly used controller, and uses conventional methods to detect the pressure at the high-pressure oil outlet, and then adjusts the opening and closing of the three-way pressure regulating valve 13 by conventional methods to achieve automatic control.

[0040] The clutch shaft oil hole 9, the intermediate shaft oil hole 11, the input shaft oil hole 12 and the synchronizer shaft oil hole 16 of the agricultural machinery hybrid transmission are all provided with lubricating oil recovery pipes, and all the lubricating oil recovery pipes are connected to the oil inlet of the oil tank.

[0041] As a preferred solution, Figure 8 As shown, a magnetic oil plug 17 is provided inside the pipeline between the oil tank outlet and the auxiliary tank inlet; it is used to absorb iron filings and impurities in the oil to achieve the preliminary purpose of cleaning the oil.

[0042] A first filtering device 18 is provided at the oil inlet of the auxiliary tank.

[0043] Further preferably, a second filter device 19 is provided at the high-pressure oil outlet of the double oil pump 1. The lubricating oil is further filtered by the first filter device 18 and the second filter device 19 to achieve the purpose of further cleaning the oil.

[0044] As a preferred solution, a plurality of first throttle holes are axially provided on the clutch shaft oil hole 9 of the agricultural machinery hybrid gearbox. The plurality of first throttle holes are axially provided on the clutch shaft oil hole 9, which further improves the lubrication effect of the clutch shaft spline 20 and the clutch shaft bearing 21 inside the clutch shaft oil hole.

[0045] Further preferably, the second low-pressure branch 10 is connected to the intermediate shaft oil hole 11 and the input shaft oil hole 12 of the agricultural machinery hybrid gearbox through the branch oil pipe;

[0046] A plurality of second throttle holes are provided in the axial direction of the branch oil pipe; the positions of the plurality of second throttle holes correspond one by one to the high gears of the agricultural machinery hybrid gearbox, thereby further improving the lubrication effect on the high gears of the agricultural machinery hybrid gearbox.

Claims

1. A hybrid gearbox lubrication system for agricultural machinery, comprising an oil tank, a main tank and an auxiliary tank installed in the gearbox; the oil outlet of the oil tank is connected to the oil inlet of the auxiliary tank through a pipeline, and the oil outlet of the auxiliary tank is connected to the oil inlet of the main tank through a pipeline; characterized in that: It also includes a double oil pump (1) arranged inside the gearbox, wherein the main box oil outlet is connected to the high-pressure oil inlet and the low-pressure oil inlet of the double oil pump (1) through the high-pressure manifold pipeline (2) and the low-pressure manifold pipeline (3) respectively; The low-pressure oil outlet of the double oil pump (1) is connected to a low-pressure oil outlet pipeline (4), the low-pressure oil outlet pipeline (4) is connected to a first end of a three-way temperature control valve (5), the second end of the three-way temperature control valve (5) is connected to an oil inlet of a temperature controller (6), and the third end is connected to a low-pressure main channel (7); the oil outlet of the temperature controller (6) is connected to one end of the low-pressure main channel (7); The other end of the low-pressure main channel (7) is divided into two paths, one of which is connected to the clutch shaft oil hole (9) of the agricultural machinery hybrid transmission through a first low-pressure branch (8), and the other is connected to the intermediate shaft oil hole (11) and the input shaft oil hole (12) of the agricultural machinery hybrid transmission through a second low-pressure branch (10); The high-pressure oil outlet of the dual oil pump (1) is connected to the first end of the three-way pressure regulating valve (13) through a pipeline, the second end of the three-way pressure regulating valve (13) is connected to one end of the high-low pressure conversion branch pipeline (14), and the other end of the high-low pressure conversion branch pipeline (14) is connected to the low-pressure main channel (7); the third end of the three-way pressure regulating valve (13) is connected to the high-pressure main channel (15), and the high-pressure main channel (15) is connected to the synchronizer shaft oil hole (16) of the agricultural machinery hybrid gearbox; The clutch shaft oil hole (9), the intermediate shaft oil hole (11), the input shaft oil hole (12) and the synchronizer shaft oil hole (16) of the agricultural machinery hybrid gearbox are all provided with lubricating oil recovery pipes, and all the lubricating oil recovery pipes are connected to the oil inlet of the oil tank.

2. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: A magnetic oil plug (17) is provided inside the pipeline between the oil outlet of the oil tank and the oil inlet of the auxiliary tank; A first filtering device (18) is provided at the oil inlet of the auxiliary tank.

3. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: A second filtering device (19) is provided at the high-pressure oil outlet of the duplex oil pump (1).

4. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: A plurality of first throttle holes are axially provided on the clutch shaft oil hole (9) of the agricultural machinery hybrid gearbox.

5. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: The second low-pressure branch (10) is connected to the intermediate shaft oil hole (11) and the input shaft oil hole (12) of the agricultural machinery hybrid gearbox through the branch oil pipe; A plurality of second throttle holes are axially provided on the branch oil pipe; positions of the plurality of second throttle holes correspond one-to-one to the high-position gears of the agricultural machinery hybrid transmission.

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