CN217055432U

CN217055432U - High-power P type injection pump of whole speed governing

Info

Publication number: CN217055432U
Application number: CN202220354253.9U
Authority: CN
Inventors: 吴宝龙; 吴凡; 朱聿琦; 侯宝军; 李伟; 沈振飞; 张会武; 霍大钧
Original assignee: Shaanxi North Dynamic Co ltd
Current assignee: Shaanxi North Dynamic Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-26
Anticipated expiration: 2032-02-22

Abstract

The application discloses high-power whole speed governing P type injection pump relates to electromechanical technical field. The oil outlet valve assembly, the plunger assembly and the power assembly are arranged in the oil injection pump body from top to bottom, and the oil quantity adjusting assembly is arranged on one side of the plunger assembly; the oil outlet valve assembly comprises an oil outlet valve and a pressure reducing valve core, the oil outlet valve is connected with the pressure reducing valve core, and the diameter of the pressure reducing valve core is 8 mm; the plunger assembly comprises a plunger, and the diameter of the plunger is phi 12 mm; the oil outlet valve component is connected with the plunger piston component through flanges, and gaskets are arranged between the flanges. The embodiment of the application provides a high-power whole-process speed regulation P-type injection pump, solves the problem that the oil supply requirement of a high-power diesel engine cannot be met by the injection pump caused by small oil supply amount of the existing injection pump, realizes the improvement of the oil supply amount of the injection pump, and further meets the purpose of the oil supply requirement of the high-power diesel engine.

Description

High-power P type injection pump of whole speed governing

Technical Field

The application relates to the technical field of electromechanics, in particular to a high-power whole-course speed-regulating P-type oil injection pump.

Background

The injection pump is an important component of an automotive diesel engine. The fuel injection pump assembly is usually an integral assembly formed by assembling components such as a fuel injection pump, a speed regulator and the like. The speed regulator is a component for ensuring the low-speed operation and the high-speed limit of the diesel engine and ensuring a certain relation between the injection quantity and the rotating speed. The fuel injection pump is the most important part of the diesel engine, and is regarded as the heart part of the diesel engine, and the heart part can cause the whole diesel engine to work abnormally once a problem occurs.

With the rapid development of the automobile and engine industries and the continuous expansion of diesel and application ranges, the market demands heavy vehicles more and more. The diesel engine for vehicles is correspondingly developed towards high power, so that new requirements are put on a fuel system. The application mainly aims to improve the performance of an oil pump of the BF12L513C (386kW) type air-cooled diesel engine in the process of inheriting the performance of the whole engine. For high-power diesel engine, traditional injection pump fuel feeding volume is less, consequently can't satisfy high-power diesel engine's fuel feeding demand.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a high-power whole-course speed regulation P-type injection pump, solves the problem that the oil supply requirement of a high-power diesel engine cannot be met by the injection pump caused by small oil supply amount of the existing injection pump, realizes the improvement of the oil supply amount of the injection pump, and further meets the purpose of the oil supply requirement of the high-power diesel engine.

The utility model provides a high-power P-type fuel injection pump with whole-range speed regulation, which comprises a fuel injection pump body, a fuel outlet valve component, a plunger component, a power component and a fuel quantity regulating component, wherein the fuel outlet valve component, the plunger component and the power component are arranged in the fuel injection pump body from top to bottom, and the fuel quantity regulating component is arranged on one side of the plunger component;

the oil outlet valve assembly comprises an oil outlet valve and a pressure reducing valve core, the oil outlet valve is connected with the pressure reducing valve core, and the diameter of the pressure reducing valve core is 8 mm; the plunger assembly comprises a plunger, and the diameter of the plunger is phi 12 mm; the oil outlet valve assembly is connected with the plunger assembly through a flange, and a gasket is arranged between the flanges.

Preferably, the gasket is provided in plurality, and the sum of the heights of the plurality of gaskets is 0.6 mm.

Preferably, the oil outlet valve assembly further comprises an oil outlet valve pressing seat, an oil outlet valve spring and an oil outlet valve seat, wherein an oil injection hole is formed in the top of the oil outlet valve pressing seat, and the oil injection hole extends downwards along the height direction of the oil outlet valve pressing seat to form an oil injection channel;

the top of the oil outlet valve seat is connected with the oil outlet valve, and the oil outlet valve seat is arranged in the oil injection channel; the bottom of the oil outlet valve seat extends along the circumferential direction to form a connecting portion, and the connecting portion is connected with the bottom of the oil outlet valve pressing seat.

Preferably, an O-shaped sealing ring is arranged between the connecting portion and the oil outlet valve pressing seat.

Preferably, the plunger assembly comprises a plunger sleeve, a plunger and a plunger spring, one end of the plunger sleeve is connected with the oil outlet valve seat, and an oil inlet hole is formed in the side wall of the plunger sleeve;

the plunger is slidably connected in the plunger sleeve and comprises a free end and a connecting end, and an oil duct which can extend to the end face of the free end is formed in the side wall of the plunger; the connecting end penetrates through the plunger spring and is connected with the power assembly.

Preferably, the oil mass adjusting assembly comprises a gear ring and an oil mass adjusting screw rod, the gear ring is sleeved on the outer wall of the plunger sleeve, and the gear ring is matched with the oil mass adjusting screw rod.

Preferably, the power assembly comprises a cam, a cam shaft and a tappet, the cam shaft penetrates through the cam, the tappet is arranged above the cam, a groove is formed in one end, close to the cam, of the tappet, and the cam can penetrate through the groove.

Preferably, two ends of the plunger spring are respectively provided with an upper plunger spring seat and a lower plunger spring seat, the upper plunger spring seat is arranged between the gear ring and the lower plunger spring seat, and the lower plunger spring seat is connected with one end, far away from the cam pair, of the tappet.

The embodiment of the utility model provides an in the one or more technical scheme that provide, have following technological effect or advantage at least:

the embodiment of the utility model adopts the oil outlet valve component, the plunger component, the power component and the oil quantity adjusting component to mutually match in the oil injection pump body to complete the basic work of oil injection; specifically, the plunger assembly guides oil into the plunger assembly under the action of the power assembly, then the oil is guided into the oil outlet valve assembly through the plunger assembly, and the oil outlet valve assembly ejects the guided high-pressure oil for the diesel engine; the oil quantity regulating assembly controls the oil quantity led in by the plunger assembly in the process. Further, in order to cooperate with the work of a high-power diesel engine (F12L513C), the structure of the oil injection pump is optimized, specifically, the diameter of a pressure reducing valve core is set to be 8mm, the diameter of a plunger is set to be phi 12mm, and the oil injection quantity is enlarged by adding a gasket between an oil outlet valve assembly and the plunger assembly. Adopt the utility model discloses a problem of the less fuel feeding demand that can't satisfy high-power diesel engine of current injection pump power has effectively been solved to the scheme, has realized the improvement of injection pump power, has further satisfied the purpose of the fuel feeding demand of high-power diesel engine.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments of the present invention or the description in the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a main structural view of a high-power full-range speed-regulating P-type fuel injection pump provided in an embodiment of the present application.

Reference numerals are as follows: 100-injection pump body; 200-an oil outlet valve assembly; 210-an oil outlet valve pressing seat; 211-oil spray holes; 212-oil injection channel; 220-outlet valve spring; 230-an oil outlet valve; 240-oil outlet valve seat; 241-a connecting part; 242-O type seal ring; 300-a plunger assembly; 310-a gasket; 320-a plunger sleeve; 321-an oil inlet hole; 330-a plunger; 340-plunger spring; 341-plunger spring upper seat; 342-plunger spring lower seat; 400-a power assembly; 410-a cam; 420-a camshaft; 430-tappet; 500-an oil mass adjusting assembly; 510-a ring gear; 520-oil quantity adjusting screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

The embodiment of the utility model provides a high-power whole journey speed governing P type injection pump, including injection pump body 100, play oil valve subassembly 200, plunger subassembly 300, power component 400 and oil mass adjusting part 500, play oil valve subassembly 200, plunger subassembly 300, power component 400 top-down set up in the inside of injection pump body 100, and oil mass adjusting part 500 sets up the one side at plunger subassembly 300.

The oil outlet valve assembly 200 comprises an oil outlet valve 230 and a pressure reducing valve core, wherein the oil outlet valve 230 is connected with the pressure reducing valve core, and the diameter of the pressure reducing valve core is 8 mm; the plunger assembly 300 includes a plunger 330, the plunger 330 having a diameter of 12 mm; the oil outlet valve assembly 200 is connected with the plunger assembly 300 through flanges, and a gasket 310 is arranged between the flanges and used for improving the circulating oil supply amount in the oil injection pump cylinder. During the experiment, after the gasket 310 is added, the stroke of the plunger 330 is lifted from 2.8mm to 3.4 mm; the pressure reducing volume of the oil outlet valve 230 is increased from 70mm by increasing the diameter of the pressure reducing valve core ³ Increase to 90mm ³ . The addition of the spacer 310 changes the stroke of the plunger 330, increases the diameter of the pressure reducing spool, and increases the diameter of the plunger 330 to change the amount of oil circulated in the injection pump cylinder. When the adjusted fuel injection pump is debugged on the oil pump test bed, the result shows that the oil supply amount per cycle on the oil pump test bed is obviously improved. The calibration power of the whole diesel engine is improved to 406 +/-12 kW from 386kW, and the maximum torque is improved to 2000-2100 N.m from 1900-1950 N.m.

The embodiment of the utility model adopts the oil outlet valve assembly 200, the plunger assembly 300, the power assembly 400 and the oil quantity adjusting assembly 500 to mutually match in the oil injection pump body 100 to complete the basic work of oil injection; specifically, the plunger assembly 300 guides oil into the plunger assembly 300 under the action of the power assembly 400, then the plunger assembly 300 guides the oil into the oil outlet valve assembly 200, and the oil outlet valve assembly 200 sprays the guided high-pressure oil for the diesel engine to use; the in-process oil amount adjusting assembly 500 controls the amount of oil introduced by the plunger assembly 300. Further, in order to cooperate with the operation of a high-power diesel engine (BF12L513C), the structure of the oil injection pump is optimized, specifically, the diameter of the pressure reducing valve core is set to 8mm, the diameter of the plunger 330 is set to phi 12mm, and the oil injection quantity is enlarged by adding the gasket 310 between the oil outlet valve assembly 200 and the plunger assembly 300. Adopt the scheme of the utility model, effectively solved the less problem that can't satisfy the fuel feeding demand of high-power diesel engine of current injection pump power, realized the improvement of injection pump power, further satisfied the purpose of the fuel feeding demand of high-power diesel engine.

In a preferred embodiment, the spacers 310 are provided in plurality, and the sum of the heights of the plurality of spacers 310 is 0.6 mm. The number of the spacers 310 is 3, and the height of each spacer 310 is set to 0.2mm, so as to adjust the stroke of the plunger 330, thereby further increasing the oil supply amount of the injection pump.

In a preferred embodiment, the outlet valve assembly 200 further includes an outlet valve pressing seat 210, an outlet valve spring 220 and an outlet valve seat 240, wherein the top of the outlet valve pressing seat 210 is opened with an oil injection hole 211, and the oil injection hole 211 extends downward along the height direction of the outlet valve pressing seat 210 to form an oil injection channel 212.

The oil outlet valve 230 is connected to the top of the oil outlet valve seat 240, and the oil outlet valve seat 240 is disposed in the oil injection passage 212; the bottom of the oil outlet valve seat 240 extends along the circumferential direction to form a connecting portion 241, the upper surface of the connecting portion 241 is connected with the bottom of the oil outlet valve pressing seat 210, and the connecting portion 241 is annularly arranged at the bottom of the oil outlet valve seat 240. The outlet valve pressing seat 210 presses and fixes the other outlet valve assemblies 200 to the injection pump body 100. The oil outlet valve 230 is a one-way valve, the surface of the oil outlet valve 230 contacting with the oil outlet valve seat 240 is arranged in a conical surface, the conical surface is tightly matched with the oil outlet valve seat 240 under the pressure action of the oil outlet valve spring 220, and the function of the oil outlet valve is to isolate the high-pressure oil pipe from the cavity at the upper end of the plunger 330 when oil supply is stopped, so that oil in the high-pressure oil pipe is prevented from flowing back into the oil injection pump.

In a preferred embodiment, an O-ring 242 is disposed between the connecting portion 241 and the oil outlet valve pressing seat 210 to prevent oil from leaking from the gap where the connecting portion 241 and the oil outlet valve pressing seat 210 are connected, and even prevent pressure leakage in the high-pressure oil chamber, further affecting the oil injection efficiency of the oil valve assembly 200.

In a preferred embodiment, the plunger assembly 300 includes a plunger sleeve 320, a plunger 330 and a plunger spring 340, wherein one end of the plunger sleeve 320 is connected to the oil outlet valve seat 240, and an oil inlet 321 is opened on a side wall of the plunger sleeve 320; the plunger 330 cooperates with the plunger sleeve 320 under the elastic force of the plunger spring 340 to complete the oil inlet, oil pressing and oil return processes.

The plunger 330 is slidably connected in the plunger sleeve 320, the plunger 330 comprises a free end and a connecting end, and an oil passage which can extend to the end face of the free end is formed in the side wall of the plunger 330; the connection end is connected to the power module 400 through the plunger spring 340. The plunger 330 is driven by the power assembly 400 to reciprocate in the plunger sleeve 320, and an oil passage on the plunger 330 is communicated with the oil inlet 321 in the reciprocating process; the oil gallery directs and pushes oil into the chamber at the top of the plunger 330, completing the oil intake and pressure.

In a preferred embodiment, the oil amount adjusting assembly 500 includes a gear ring 510 and an oil amount adjusting screw 520, the gear ring 510 is sleeved on the outer wall of the plunger sleeve 320, and the gear ring 510 is disposed in cooperation with the oil amount adjusting screw 520. The gear ring 510 and the oil quantity adjusting screw 520 work together to further adjust the uniformity of oil supply of each cylinder.

In the preferred embodiment, power assembly 400 includes a cam 410, a cam shaft 420, and a tappet 430, wherein cam shaft 420 passes through cam 410, tappet 430 is disposed above cam 410, and a groove is disposed at an end of tappet 430 near cam 410, through which cam 410 can pass. The cam shaft 420 rotates the cam 410, and the force generated by the cam 410 during the rotation pushes the tappet 430 to reciprocate in the vertical direction, thereby indirectly providing power for the plunger 330.

In a preferred embodiment, the plunger spring 340 is provided with an upper plunger spring seat 341 and a lower plunger spring seat 342 at two ends, the upper plunger spring seat 341 is disposed between the gear ring 510 and the lower plunger spring seat 342, and the lower plunger spring seat 342 is connected to one end of the tappet 430 away from the cam 410. The plunger spring upper seat 341 fixes one end of the plunger spring 340 on the outer wall of the plunger sleeve 320, the plunger spring lower seat 342 fixedly connects the other end of the plunger spring 340 to the free end of the tappet 430, and in the rotating process of the cam 410, the elastic force generated by the extension and contraction of the plunger spring 340 provides continuous power for the plunger 330 to ensure the ordered operation of oil supply.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims

1. A high-power P-type oil injection pump capable of regulating speed in the whole process comprises an oil injection pump body (100), an oil outlet valve assembly (200), a plunger assembly (300), a power assembly (400) and an oil quantity regulating assembly (500), wherein the oil outlet valve assembly (200), the plunger assembly (300) and the power assembly (400) are arranged in the oil injection pump body (100) from top to bottom, the oil outlet valve assembly (200) comprises an oil outlet valve (230) and a pressure reducing valve core, and the oil outlet valve (230) is connected with the pressure reducing valve core; the oil quantity adjusting assembly (500) is arranged on one side of the plunger assembly (300);

the pressure reducing valve is characterized in that the diameter of the pressure reducing valve core is 8 mm; the plunger assembly (300) comprises a plunger (330), the plunger (330) having a diameter of phi 12 mm; the oil outlet valve assembly (200) is connected with the plunger assembly (300) through flanges, and a gasket (310) is arranged between the flanges.

2. The high power whole range speed regulating P-type fuel injection pump according to claim 1, wherein the gasket (310) is provided in plurality, and the sum of the heights of the plurality of gaskets (310) is 0.6 mm.

3. The high-power full-stroke speed-regulating P-type oil injection pump according to claim 1, wherein the oil outlet valve assembly (200) further comprises an oil outlet valve pressing seat (210), an oil outlet valve spring (220) and an oil outlet valve seat (240), an oil injection hole (211) is formed in the top of the oil outlet valve pressing seat (210), and the oil injection hole (211) extends downwards along the height direction of the oil outlet valve pressing seat (210) to form an oil injection channel (212);

the top of the oil outlet valve seat (240) is connected with the oil outlet valve (230), and the oil outlet valve seat (240) is arranged in the oil injection channel (212); the bottom of the oil outlet valve seat (240) extends along the circumferential direction to form a connecting portion (241), and the connecting portion (241) is connected with the bottom of the oil outlet valve pressing seat (210).

4. The high-power full-stroke speed-regulating P-type oil injection pump according to claim 3, characterized in that an O-shaped sealing ring (242) is arranged between the connecting part (241) and the oil outlet valve pressing seat (210).

5. The high-power P-type fuel injection pump with the whole range of speed regulation according to claim 3, wherein the plunger assembly (300) comprises a plunger sleeve (320), a plunger (330) and a plunger spring (340), one end of the plunger sleeve (320) is connected with the fuel outlet valve seat (240), and an oil inlet hole (321) is formed in the side wall of the plunger sleeve (320);

the plunger (330) is slidably connected in the plunger sleeve (320), the plunger (330) comprises a free end and a connecting end, and an oil passage which can extend to the end face of the free end is formed in the side wall of the plunger (330); the connecting end is connected with the power assembly (400) through the plunger spring (340).

6. The high-power full-stroke speed-regulating P-type oil injection pump according to claim 5, wherein the oil quantity regulating assembly (500) comprises a gear ring (510) and an oil quantity regulating screw (520), the gear ring (510) is sleeved on the outer wall of the plunger sleeve (320), and the gear ring (510) is matched with the oil quantity regulating screw (520).

7. The high-power full-stroke speed-regulating P-type oil injection pump according to claim 6, wherein the power assembly (400) comprises a cam (410), a cam shaft (420) and a tappet (430), the cam shaft (420) penetrates through the cam (410), the tappet (430) is arranged above the cam (410), a groove is formed in one end, close to the cam (410), of the tappet (430), and the cam (410) can penetrate through the groove.

8. The high-power P-type fuel injection pump with the whole range of speed regulation according to claim 7, wherein an upper plunger spring seat (341) and a lower plunger spring seat (342) are respectively arranged at two ends of the plunger spring (340), the upper plunger spring seat (341) is arranged between the gear ring (510) and the lower plunger spring seat (342), and the lower plunger spring seat (342) is connected with one end of the tappet (430) far away from the cam (410).