Liquid pressure regulating device

Abstract

The invention discloses a liquid pressure regulating device which comprises a pressure regulating shell, one side of the pressure regulating shell is connected with a sealing head, the surface of the sealing head is in threaded connection with an oil inlet, a pump core is arranged in the pressure regulating shell, one end of the pump core is communicated with the oil inlet, and the other end of the pump core is communicated with a high-pressure oil channel in the pressure regulating shell. An adjusting groove is formed in one end of the high-pressure oil channel, a pressure adjusting plug is arranged in the adjusting groove, one end of the pressure adjusting plug is connected with a pressure adjusting spring, and when the pressure of high-pressure oil in the high-pressure oil channel exceeds the resistance of the pressure adjusting plug, the high-pressure oil can extrude the pressure adjusting plug to move into the adjusting groove and compress the spring; at the moment, a large amount of high-pressure oil pushes the pressure adjusting plug to move to the pressure relief oil return channel, the high-pressure oil can flow to the oil return opening from the pressure relief oil return channel to be subjected to pressure relief, the oil return opening is communicated with the motorcycle oil tank, and therefore the pressure-relieved high-pressure oil can flow back into the motorcycle oil tank, and the effect of adjusting the pressure of gasoline in the high-pressure oil channel can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of motorcycle oil pumps, and in particular relates to a liquid pressure regulating device. Background Art

[0002] The fuel pump of an electronic fuel injection motorcycle is a device that supplies fuel to the fuel injectors of an electronic fuel injection motorcycle. In the fuel supply system of an electronic fuel injection motorcycle, the design pattern of the traditional fuel pump has obvious limitations. Since the traditional electronic fuel injection motorcycle fuel pump is set to deliver fuel to the fuel injector at a single fixed pressure value when leaving the factory, this fixed pressure output method exposes many problems in actual application scenarios. For example, when a motorcycle faces starting difficulties (cannot start the car), the fuel supply pressure cannot be flexibly adjusted according to actual needs. Once the fuel supply pressure deviates from the optimal range required for engine starting, that is, the fuel supply is too large or too small, the motorcycle engine will have difficulty working normally. In this case, the overall performance of the motorcycle is seriously affected, and it cannot start and run normally, causing great inconvenience to the user. Summary of the invention

[0003] The object of the present invention is to provide a liquid pressure regulating device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a liquid pressure regulating device, comprising:

[0005] A pressure regulating shell, one side of which is connected to a sealing head, a surface of which is threadedly connected to an oil inlet, a pump core is arranged in the pressure regulating shell, one end of the pump core is respectively connected to the oil inlet, and the other end is connected to a high-pressure oil channel in the pressure regulating shell, one end of the high-pressure oil channel is provided with an adjusting groove, and a pressure regulating plug is arranged in the adjusting groove, the pressure regulating plug seals the bottom of the high-pressure oil channel, one end of the pressure regulating plug is connected to a pressure regulating spring, the high-pressure oil in the high-pressure oil channel squeezes the pressure regulating plug to slide downward and compress the pressure regulating spring, so that when the fuel pressure in the high-pressure oil channel is too large, the pressure is discharged into the pressure relief return oil channel.

[0006] Preferably, a pressure-adjusting screw is provided in the bottom of the adjusting groove, one end of the pressure-adjusting spring is connected to the pressure-adjusting screw, and the other end of the pressure-adjusting screw penetrates the pressure-adjusting nut on the surface of the pressure-adjusting shell and extends to the outside of the pressure-adjusting shell.

[0007] Preferably, the pressure-adjusting screw is threadedly connected to the pressure-adjusting nut.

[0008] Preferably, an oil outlet passage is provided on one side of the high-pressure oil passage, and the pressure regulating shell is threadedly connected with an oil outlet, and one end of the oil outlet located in the pressure regulating shell is connected to the oil outlet passage.

[0009] Preferably, the pressure relief oil return oil passage is arranged in the pressure regulating shell and one end of the pressure relief oil return oil passage is connected to the regulating groove.

[0010] Preferably, an oil return port is threadedly connected on the surface of the pressure regulating shell and located at the bottom of the oil inlet, and one end of the oil return port located in the pressure regulating shell is connected to the pressure relief oil return channel.

[0011] Preferably, an exhaust oil and gas passage is provided in the pressure regulating shell, and one end of the exhaust oil and gas passage is connected to the pressure relief oil return passage, and the other end is connected to the exhaust pipe in the pressure regulating shell.

[0012] Preferably, sealing rings are provided at the connection points between the sealing head, the oil inlet, the oil outlet, the pressure regulating screw, the oil return port and the pressure regulating shell.

[0013] Preferably, the pressure regulating plug is arranged in a T-shape.

[0014] Compared with the prior art, the beneficial effect of the present invention is that the gasoline in the motorcycle tank enters the pump core in the pressure regulating shell through the oil inlet, and after the pump core is rotated and pressurized, the high-pressure oil is pumped out from the oil outlet of the pump core into the high-pressure oil channel. When the high-pressure oil flows through the high-pressure oil channel, it is blocked by the pressure regulating plug, but the resistance of the pressure regulating plug is not infinite resistance. Therefore, when the pressure of the high-pressure oil accumulated in the high-pressure oil channel exceeds the resistance of the pressure regulating plug (the oil supply is too large), the high-pressure oil will squeeze the pressure regulating plug to move into the regulating groove and compress the spring. At this time, when a large amount of high-pressure oil pushes the pressure regulating plug to move to the pressure relief return oil channel, the high-pressure oil can flow from the pressure relief return oil channel to the oil return port for pressure relief. Since the oil return port is connected to the motorcycle tank, the depressurized high-pressure oil can flow back into the motorcycle tank, thereby achieving the effect of regulating the gasoline pressure in the high-pressure oil channel, and the high-pressure oil after the pressure is adjusted flows to the oil outlet through the oil outlet channel, and supplies oil to the engine fuel injector through the high-pressure oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 An exploded view of the present invention;

[0017] Figure 3 It is a cross-sectional view of the present invention.

[0018] In the figure: 1. Pressure regulating housing; 2. Sealing head; 3. Oil inlet; 4. Pump core; 5. High-pressure oil channel; 6. Adjusting groove; 7. Pressure regulating plug; 8. Pressure regulating spring; 9. Pressure relief return oil channel; 10. Pressure regulating screw; 11. Pressure regulating nut; 12. Oil outlet channel; 13. Oil outlet; 14. Oil return port; 15. Oil and gas exhaust channel; 16. Sealing ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides Figure 1-3 A liquid pressure regulating device is shown, comprising:

[0021] A pressure regulating shell 1, a sealing head 2 is connected to one side of the pressure regulating shell 1, an oil inlet 3 is threadedly connected to the surface of the sealing head 2, a pump core 4 is arranged in the pressure regulating shell 1, one end of the pump core 4 is respectively communicated with the oil inlet 3, and the other end is communicated with the high-pressure oil channel 5 in the pressure regulating shell 1, an adjusting groove 6 is arranged at one end of the high-pressure oil channel 5, and a pressure regulating plug 7 is arranged in the adjusting groove 6, the pressure regulating plug 7 is T-shaped, the pressure regulating plug 7 seals the bottom of the high-pressure oil channel 5, and a pressure regulating spring 8 is connected to one end of the pressure regulating plug 7, the high-pressure oil in the high-pressure oil channel 5 squeezes the pressure regulating plug 7 to slide downward and compress the pressure regulating spring 8, so that when the fuel pressure in the high-pressure oil channel 5 is too large, the pressure is relieved to the pressure relief return oil channel 9, such as the normal working pressure range of the fuel in the high-pressure oil channel 5 is set to X-YMPa (Y is greater than X), and the pressure relief return oil channel 9 is triggered. The pressure threshold for starting operation is set to ZMPa (Z is greater than Y). When the fuel pressure in the high-pressure oil channel 5 rises to more than ZMPa due to excessive fuel supply, high-pressure fuel with a certain pressure is formed, which can squeeze the pressure regulating plug 7 downward to move.

[0022] A pressure-adjusting screw 10 is provided at the bottom of the adjusting groove 6, one end of the pressure-adjusting spring 8 is connected to the pressure-adjusting screw 10, and the other end of the pressure-adjusting screw 10 passes through a pressure-adjusting nut 11 on the surface of the pressure-adjusting shell 1 and extends to the outside of the pressure-adjusting shell 1, and the pressure-adjusting screw 10 is threadedly connected to the pressure-adjusting nut 11.

[0023] An oil outlet passage 12 is disposed on one side of the high-pressure oil passage 5 , and an oil outlet port 13 is threadedly connected to the pressure regulating housing 1 . One end of the oil outlet port 13 located in the pressure regulating housing 1 is connected to the oil outlet passage 12 .

[0024] The pressure relief oil return passage 9 is arranged in the pressure regulating housing 1 and one end of the pressure relief oil return passage 9 is communicated with the regulating groove 6 .

[0025] An oil return port 14 is threadedly connected to the surface of the pressure regulating shell 1 and located at the bottom of the oil inlet 3. One end of the oil return port 14 located in the pressure regulating shell 1 is connected to the pressure relief return oil passage 9. An oil drain passage 15 is provided in the pressure regulating shell 1, and one end of the oil drain passage 15 is connected to the pressure relief return oil passage 9, and the other end is connected to the exhaust pipe in the pressure regulating shell 1. The liquid in the pressure regulating shell 1 is prone to produce an oil-gas mixture during the pressure change and flow process. The oil drain passage 15 is connected to the pressure relief return oil passage 9, and the oil-gas mixture can be introduced into the oil drain passage 15 during the liquid reflux process, and then discharged from the pressure regulating shell 1 through the exhaust pipe, thereby ensuring the accuracy and stability of the liquid pressure regulation in the pressure regulating shell 1.

[0026] The connections between the sealing head 2, the oil inlet 3, the oil outlet 13, the pressure regulating screw 10, the oil return port 14 and the pressure regulating shell 1 are all provided with sealing rings 16, which can seal the connections to prevent liquid from leaking from the connections and causing pressure instability.

[0027] In the liquid pressure regulating device, the gasoline in the motorcycle tank enters the pump core 4 in the pressure regulating housing 1 through the oil inlet 3, and after the pump core 4 rotates and pressurizes, the high-pressure oil is pumped out from the oil outlet 13 of the pump core 4 to the high-pressure oil channel 5. When the high-pressure oil flows through the high-pressure oil channel 5, it is blocked by the pressure regulating plug 7, but the resistance of the pressure regulating plug 7 is not infinite. Therefore, when the pressure of the high-pressure oil accumulated in the high-pressure oil channel 5 exceeds the resistance of the pressure regulating plug 7 (the oil supply is too large), the high-pressure oil will squeeze the pressure regulating plug 7 and move into the regulating groove 6. The spring is moved and compressed. At this time, a large amount of high-pressure oil pushes the pressure regulating plug 7 to move to the pressure relief oil return passage 9. The high-pressure oil can flow from the pressure relief oil return passage 9 to the oil return port 14 for pressure relief. Since the oil return port 14 is connected to the motorcycle fuel tank, the pressure-relieved high-pressure oil can flow back into the motorcycle fuel tank, thereby achieving the effect of regulating the gasoline pressure in the high-pressure oil passage 5. The high-pressure oil after the pressure adjustment flows to the oil outlet 13 through the oil outlet passage 12, and supplies oil to the engine fuel injector through the high-pressure oil pipe.

[0028] The resistance of the pressure regulating plug 7 is affected by the pressure regulating spring 8 and the pressure regulating screw 10. When the pressure regulating screw 10 is screwed in the pressure regulating housing 1, the pressure regulating spring 8 is stretched or compressed, thereby increasing or decreasing the resistance of the pressure regulating plug 7.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid pressure regulating device, characterized in that: include: A pressure regulating shell (1), wherein one side of the pressure regulating shell (1) is connected to a sealing head (2), and the surface of the sealing head (2) is threadedly connected to an oil inlet (3), wherein a pump core (4) is arranged in the pressure regulating shell (1), and one end of the pump core (4) is respectively connected to the oil inlet (3), and the other end is connected to a high-pressure oil passage (5) in the pressure regulating shell (1), wherein one end of the high-pressure oil passage (5) is provided with an adjusting groove (6), and a pressure regulating plug (7) is arranged in the adjusting groove (6), wherein the pressure regulating plug (7) seals the bottom of the high-pressure oil passage (5), and one end of the pressure regulating plug (7) is connected to a pressure regulating spring (8), and the high-pressure oil in the high-pressure oil passage (5) squeezes the pressure regulating plug (7) to slide downward and compress the pressure regulating spring (8), so that the fuel in the high-pressure oil passage (5) is depressurized into a pressure relief oil return passage (9).

2. A liquid pressure regulating device according to claim 1, characterized in that: A pressure regulating screw (10) is provided at the bottom of the regulating groove (6), one end of the pressure regulating spring (8) is connected to the pressure regulating screw (10), and the other end of the pressure regulating screw (10) penetrates a pressure regulating nut (11) on the surface of the pressure regulating shell (1) and then extends to the outside of the pressure regulating shell (1).

3. A liquid pressure regulating device according to claim 2, characterized in that: The pressure regulating screw (10) is threadedly connected to the pressure regulating nut (11).

4. A liquid pressure regulating device according to claim 2, characterized in that: An oil outlet passage (12) is provided on one side of the high-pressure oil passage (5), and the pressure regulating housing (1) is threadedly connected with an oil outlet port (13), and one end of the oil outlet port (13) located inside the pressure regulating housing (1) is connected to the oil outlet passage (12).

5. The liquid pressure regulating device according to claim 1, characterized in that: The pressure relief oil return passage (9) is arranged in the pressure regulating shell (1), and one end of the pressure relief oil return passage (9) is in communication with the regulating groove (6).

6. A liquid pressure regulating device according to claim 4, characterized in that: An oil return port (14) is threadedly connected to the surface of the pressure regulating shell (1) and is located at the bottom of the oil inlet (3); one end of the oil return port (14) located inside the pressure regulating shell (1) is connected to the pressure relief oil return passage (9).

7. A liquid pressure regulating device according to claim 1, characterized in that: An oil and gas exhaust passage (15) is provided in the pressure regulating shell (1), and one end of the oil and gas exhaust passage (15) is connected to the pressure relief oil return passage (9), and the other end is connected to the exhaust pipe in the pressure regulating shell (1).

8. A liquid pressure regulating device according to claim 6, characterized in that: Sealing rings (16) are provided at the connection points between the sealing head (2), the oil inlet (3), the oil outlet (13), the pressure regulating screw (10), the oil return port (14) and the pressure regulating housing (1).

9. A liquid pressure regulating device according to claim 1, characterized in that: The pressure regulating plug (7) is arranged in a T-shape.

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