Self-adaptive adjusting device for hydraulic load of high-pressure oil pump

Abstract

The utility model relates to the technical field of high-pressure oil pumps, and discloses a high-pressure oil pump hydraulic load self-adaptive adjusting device which comprises a T-shaped pipe, first piston shells are fixedly installed at the upper end and the lower end of the T-shaped pipe respectively, and oil way conveying mechanisms are arranged in the two first piston shells. A second piston shell is installed on one side of the T-shaped pipe, a driving block is slidably arranged on the inner wall of the second piston shell in a penetrating mode, when the motor drives the driving cone to rotate, the driving cone can drive the driving block to move, oil way conveying is facilitated under the cooperation of an oil way conveying mechanism, and when the negative pressure is large, the electric push rod pushes the L-shaped plate, so that the motor and the connecting rod move towards the driving cone; therefore, the contact diameters of the driving cone and the driving block are different, piston forces caused by the driving block are different, negative pressure can be conveniently adjusted, the adjusting process is rapid and accurate, impact and damage of hydraulic loads to the oil pump body are effectively reduced, the oil pump body is protected against damage, and the service life of the oil pump body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure oil pumps, in particular to a hydraulic load self-adapting regulating device for a high-pressure oil pump. Background Art

[0002] The high-pressure oil pump is an important mechanical equipment, which is mainly used to inject the fuel into the engine combustion chamber in the form of high pressure, so as to realize the combustion of the fuel and the normal operation of the engine. It is a key component in the engine fuel system, and its performance directly affects the engine's power, fuel economy and emissions. The working principle of the high-pressure oil pump is mainly based on the working mechanism of the plunger or plunger pump, which pressurizes the fuel to a high-pressure state, and then injects the high-pressure fuel into the engine combustion chamber through a nozzle. The pressure is usually between 1000 and 2000 bar. This high-pressure state can make the fuel better atomized, so as to achieve more complete combustion and improve the power and economy of the engine. There are various types of high-pressure oil pumps, including one-way plunger pumps, two-way plunger pumps, common rail high-pressure oil pumps, etc. Among them, the common rail high-pressure oil pump is the most advanced one at present. It adopts advanced electronic control technology and high-precision fuel injection system, which can achieve more accurate fuel injection and more efficient combustion, thereby greatly improving the performance and economy of the engine.

[0003] A conventional high-pressure oil pump will generate a hydraulic load during use, which may cause damage to the oil pump body and reduce the service life of the oil pump body. Utility Model Content

[0004] The purpose of the utility model is to provide a high-pressure oil pump hydraulic load adaptive adjustment device, which solves the problem that a traditional high-pressure oil pump will generate a hydraulic load during use, so that the hydraulic load may cause damage to the oil pump body and reduce the service life of the oil pump body.

[0005] The embodiment of the present application provides a high-pressure oil pump hydraulic load adaptive adjustment device, comprising a T-tube, wherein the upper end and the lower end of the T-tube are respectively fixedly mounted with a first piston shell, and an oil conveying mechanism is arranged inside the two first piston shells; a second piston shell is mounted on one side of the T-tube, a driving block is slidably penetrated through the inner wall of the second piston shell, a reset mechanism is arranged between the driving block and the second piston shell, an outer shell is mounted on the outer wall of the two first piston shells, an L-shaped frame is mounted on one side of the outer shell, an electric push rod is mounted on the inner wall of the L-shaped frame, an L-shaped plate is fixedly connected to the telescopic end of the electric push rod, a motor is mounted on the upper end of the L-shaped plate, a connecting rod is fixedly connected to the output shaft of the motor, the connecting rod slides through the outer wall of the outer shell and extends to the inside of the outer shell, a driving cone is mounted on the side of the connecting rod away from the motor, and the connecting rod is mounted at a position offset from the center of the driving cone, the outer wall of the driving cone contacts the outer wall of the driving block, and connecting pipes are respectively mounted on the side of the two first piston shells away from the T-tube.

[0006] By adopting the above technical solution, when the motor drives the driving cone to rotate, the driving cone can drive the driving block to move, and the oil conveying mechanism cooperates to facilitate oil conveying. When the negative pressure is large, the electric push rod pushes the L-shaped plate to move the motor and the connecting rod toward the driving cone, so that the contact diameters of the driving cone and the driving block can be different, and the piston force caused by the driving block can be different, thereby facilitating the adjustment of the negative pressure. The adjustment process is fast and accurate, which effectively reduces the impact and damage of the hydraulic load on the oil pump body, protects the oil pump body from damage, and extends its service life.

[0007] Optionally, a battery is installed at the lower end of the L-shaped frame, and the battery is electrically connected to the electric push rod and the motor.

[0008] By adopting the above technical solution, the L-shaped frame can fix the battery, and the battery can supply power to the electric push rod and the motor.

[0009] Optionally, an outer wall of the driving cone on a side away from the connecting rod is fixedly connected with a movable rod, and the movable rod slides through the inner wall of the outer shell and extends to the outside of the outer shell.

[0010] By adopting the above technical solution, the movable rod can be arranged to facilitate the driving cone to play the role of mobile support.

[0011] Optionally, a side of the movable rod away from the driving cone is fixedly connected to a limiting block.

[0012] By adopting the above technical solution, the movable rod can fix the limiting rod, and the limiting block can limit the movable rod.

[0013] Optionally, the oil conveying mechanism includes two groups of piston blocks, the two groups of piston blocks are slidingly connected to the inner wall of the first piston shell respectively, the upper ends of the two groups of the first piston shells are fixedly connected with first springs respectively, and the lower ends of the first springs are fixedly connected to the piston blocks.

[0014] By adopting the above technical solution, the first piston shell can fix the first spring, and the first spring can reset the piston block, thereby facilitating the piston block to seal and open the first piston shell.

[0015] Optionally, the reset mechanism includes a second spring, one side of the second spring is fixedly connected to the inner wall of the second piston housing, and the other side of the second spring is fixedly connected to the driving block.

[0016] By adopting the above technical solution, the drive block can be reset by setting the second spring.

[0017] Optionally, a side of the driving block away from the second spring is arranged in an elliptical shape.

[0018] By adopting the above technical solution, the side of the driving block away from the second spring is elliptical, which makes it easier for the driving cone to drive it.

[0019] Optionally, the diameters of the two groups of the first springs and the second springs are greater than the diameter of the T-tube.

[0020] By adopting the above technical solution, the diameters of the first spring and the second spring are larger than the diameter of the T-tube, so the transportation of the oil circuit is facilitated.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] The technical solution of the present application drives the driving cone to rotate through the motor, and the driving cone can drive the driving block to move, which facilitates oil transportation with the cooperation of the oil transportation mechanism. When the negative pressure is large, the electric push rod pushes the L-shaped plate to move the motor and the connecting rod toward the driving cone, so that the contact diameters of the driving cone and the driving block can be different, and the piston force caused by the driving block can be different, thereby facilitating the adjustment of the negative pressure. The adjustment process is fast and accurate, which effectively reduces the impact and damage of the hydraulic load on the oil pump body, protects the oil pump body from damage, and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a front view schematic diagram of a hydraulic load adaptive adjustment device for a high-pressure oil pump according to the utility model;

[0025] Figure 2 It is a schematic diagram of a front view of a hydraulic load adaptive adjustment device for a high-pressure oil pump according to the utility model;

[0026] Figure 3 It is a front view schematic diagram of a driving cone of a hydraulic load adaptive adjustment device for a high-pressure oil pump of the utility model;

[0027] Figure 4 This is a left-view partial cross-sectional view of a T-tube of a hydraulic load adaptive adjustment device for a high-pressure oil pump according to the utility model.

[0028] In the figure: 1, T-tube; 2, first piston shell; 3, second piston shell; 4, drive block; 5, connecting pipe; 6, outer shell; 7, L-frame; 8, electric push rod; 9, L-plate; 10, motor; 11, connecting rod; 12, driving cone; 13, movable rod; 14, limit block; 15, battery; 16, first spring; 17, piston block; 18, second spring. DETAILED DESCRIPTION

[0029] See also Figure 1-4 The utility model provides a technical solution: a high-pressure oil pump hydraulic load adaptive adjustment device, comprising a T-tube 1, the upper end and the lower end of the T-tube 1 are respectively fixedly mounted with a first piston shell 2, and the two first piston shells 2 are provided with an oil conveying mechanism inside; a second piston shell 3 is installed on one side of the T-tube 1, a driving block 4 is slidably penetrated through the inner wall of the second piston shell 3, a reset mechanism is provided between the driving block 4 and the second piston shell 3, a shell 6 is installed on the outer wall of the two first piston shells 2, an L-shaped frame 7 is installed on one side of the shell 6, an electric push rod 8 is installed on the inner wall of the L-shaped frame 7, and an electric push rod 8 is installed on the inner wall of the electric push rod 8. The telescopic end of the push rod 8 is fixedly connected to an L-shaped plate 9, and a motor 10 is installed on the upper end of the L-shaped plate 9. The output shaft of the motor 10 is fixedly connected to a connecting rod 11. The connecting rod 11 slides through the outer wall of the outer shell 6 and extends to the inside of the outer shell 6. A driving cone 12 is installed on the side of the connecting rod 11 away from the motor 10, and the connecting rod 11 is installed at a position offset from the center of the driving cone 12. The outer wall of the driving cone 12 contacts the outer wall of the driving block 4, and the two first piston shells 2 are respectively installed with connecting tubes 5 on one side away from the T-tube 1; the side of the driving block 4 away from the second spring 18 is elliptical.

[0030] In the technical solution of the utility model, when the driving cone 12 is driven to rotate by the motor 10, the driving cone 12 can drive the driving block 4 to move, and the oil circuit transportation is convenient with the cooperation of the oil circuit transportation mechanism. When the negative pressure is large, the electric push rod 8 pushes the L-shaped plate 9 to move the motor 10 and the connecting rod 11 toward the driving cone 12, so that the diameters of the contact between the driving cone 12 and the driving block 4 can be different, and the piston force caused by the driving block 4 can be different, thereby facilitating the adjustment of the negative pressure. The adjustment process is fast and accurate, which effectively reduces the impact and damage of the hydraulic load on the oil pump body, protects the oil pump body from damage, and extends its service life.

[0031] In addition, the side of the driving block 4 away from the second spring 18 is elliptical, which makes it easier for the driving cone 12 to drive it.

[0032] In the technical solution of the utility model, if Figure 4 As shown, the oil conveying mechanism includes two groups of piston blocks 17, and the two groups of piston blocks 17 are respectively slidably connected to the inner wall of the first piston shell 2, and the upper ends of the two groups of first piston shells 2 are respectively fixedly connected with first springs 16, and the lower ends of the first springs 16 are fixedly connected to the piston blocks 17. The first piston shell 2 can fix the first spring 16, and the first spring 16 can reset the piston block 17, thereby facilitating the piston block 17 to seal and open the first piston shell 2.

[0033] In the technical solution of the utility model, if Figure 4 As shown, the reset mechanism includes a second spring 18, one side of the second spring 18 is fixedly connected to the inner wall of the second piston housing 3, and the other side of the second spring 18 is fixedly connected to the drive block 4. The setting of the second spring 18 can reset the drive block 4. The diameters of the two groups of first springs 16 and second springs 18 are larger than the diameter of the T-tube 1. By making the diameters of the first springs 16 and the second springs 18 larger than the diameter of the T-tube 1, the oil circuit is convenient for transportation.

[0034] In the technical solution of the utility model, if Figure 1 , Figure 2 and Figure 3 As shown, a battery 15 is installed at the lower end of the L-shaped frame 7, and the battery 15 is electrically connected to the electric push rod 8 and the motor 10. The L-shaped frame 7 can fix the battery 15, and the battery 15 can supply power to the electric push rod 8 and the motor 10.

[0035] In the technical solution of the utility model, if Figure 1 and Figure 2As shown, the outer wall of the driving cone 12 away from the connecting rod 11 is fixedly connected with a movable rod 13, and the movable rod 13 slides through the inner wall of the outer shell 6 and extends to the outside of the outer shell 6. The setting of the movable rod 13 can facilitate the driving cone 12 to play a role of mobile support, and the movable rod 13 is fixedly connected to a limiting block 14 on the side away from the driving cone 12. The movable rod 13 can fix the limiting rod, and the limiting block 14 can limit the movable rod 13.

[0036] When in use, first, when the hydraulic load exceeds the preset threshold, the device starts the adaptive adjustment mechanism, and the motor 10 drives the connecting rod 11 to rotate. Since the connecting rod 11 is installed at a position offset from the center of the driving cone 12, the driving cone 12 rotates eccentrically under the drive of the connecting rod 11, and the outer wall of the driving cone 12 contacts the driving block 4, and the driving block 4 is pushed to slide in the second piston shell 3 through the eccentric rotation, and then plays the role of piston hydraulics inside the T-tube 1 with the cooperation of the second spring 18. When the driving block 4 is displaced, the two piston blocks 17 are respectively in a closed and open state, which is convenient for oil transportation. When the hydraulic load is on, the electric push rod 8 pushes the L-shaped plate 9 to move the motor 10 and the connecting rod 11 toward the driving cone 12, so that the diameter of the contact between the driving cone 12 and the driving block 4 can be different, and the piston force caused by the driving block 4 can be different, thereby facilitating the adjustment of the negative pressure.

Claims

1. A high-pressure oil pump hydraulic load adaptive adjustment device, characterized in that: The invention comprises a T-shaped tube (1), wherein a first piston shell (2) is fixedly mounted on the upper end and the lower end of the T-shaped tube (1), and an oil conveying mechanism is arranged inside the two first piston shells (2); a second piston shell (3) is mounted on one side of the T-shaped tube (1), a driving block (4) is slidably penetrated through the inner wall of the second piston shell (3), a reset mechanism is arranged between the driving block (4) and the second piston shell (3); an outer shell (6) is mounted on the outer walls of the two first piston shells (2), an L-shaped frame (7) is mounted on one side of the outer shell (6), an electric push rod (8) is mounted on the inner wall of the L-shaped frame (7), and the electric push rod (8) The telescopic end is fixedly connected to an L-shaped plate (9), the upper end of the L-shaped plate (9) is installed with a motor (10), the output shaft of the motor (10) is fixedly connected to a connecting rod (11), the connecting rod (11) slides through the outer wall of the outer shell (6) and extends to the inside of the outer shell (6), a driving cone (12) is installed on the side of the connecting rod (11) away from the motor (10), and the connecting rod (11) is installed at a position offset from the center of the driving cone (12), the outer wall of the driving cone (12) contacts the outer wall of the driving block (4), and the two first piston shells (2) are respectively installed with connecting pipes (5) on the side away from the T-shaped tube (1).

2. A high-pressure oil pump hydraulic load adaptive adjustment device according to claim 1, characterized in that: A storage battery (15) is installed at the lower end of the L-shaped frame (7), and the storage battery (15) is electrically connected to the electric push rod (8) and the motor (10).

3. The high-pressure oil pump hydraulic load adaptive adjustment device according to claim 1, characterized in that: The outer wall of the driving cone (12) on the side away from the connecting rod (11) is fixedly connected with a movable rod (13), and the movable rod (13) slides through the inner wall of the outer shell (6) and extends to the outside of the outer shell (6).

4. A high-pressure oil pump hydraulic load adaptive adjustment device according to claim 3, characterized in that: The side of the movable rod (13) away from the driving cone (12) is fixedly connected to a limiting block (14).

5. The high-pressure oil pump hydraulic load adaptive adjustment device according to claim 1, characterized in that: The oil conveying mechanism comprises two groups of piston blocks (17), the two groups of piston blocks (17) are respectively slidably connected to the inner wall of the first piston shell (2), the upper ends of the two groups of the first piston shell (2) are respectively fixedly connected to the first spring (16), and the lower end of the first spring (16) is fixedly connected to the piston block (17).

6. A high-pressure oil pump hydraulic load adaptive adjustment device according to claim 5, characterized in that: The reset mechanism comprises a second spring (18), one side of the second spring (18) is fixedly connected to the inner wall of the second piston housing (3), and the other side of the second spring (18) is fixedly connected to the driving block (4).

7. A high-pressure oil pump hydraulic load adaptive adjustment device according to claim 6, characterized in that: A side surface of the driving block (4) away from the second spring (18) is arranged in an elliptical shape.

8. The high-pressure oil pump hydraulic load adaptive adjustment device according to claim 6, characterized in that: The diameters of the two groups of the first spring (16) and the second spring (18) are greater than the diameter of the T-shaped tube (1).

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