Methanol pump plunger and barrel assembly with multi-scheme adaptability

Abstract

The methanol pump plunger and barrel assembly with the multi-scheme adaptability comprises a plunger sleeve and a plunger body, a through hole is formed in the plunger sleeve, the plunger body is connected into the through hole in a sliding mode, a methanol pressurizing cavity is formed in the top of the through hole, and a methanol pump is arranged in the methanol pressurizing cavity. The sealing structure is characterized in that a first ring groove, a first sealing groove, a second ring groove and a second sealing groove are sequentially formed in the through hole from top to bottom; a methanol flow channel and a medium flow channel are arranged in the plunger sleeve, the methanol flow channel is communicated with the first annular groove and used for discharging liquid in the first annular groove, and the medium flow channel is communicated with the second annular groove and used for introducing a lubricating medium into the second annular groove to lubricate the plunger body; the methanol pump plunger and barrel assembly solves the problem that a traditional methanol pump plunger and barrel assembly is prone to leakage and mutual pollution with methanol when different lubricating media are used.

Description

Technical Field

[0001] The utility model relates to the technical field of engine components, in particular to a methanol pump plunger pair with multi-scheme adaptability. Background Art

[0002] With the vigorous implementation of the "dual carbon" policy, traditional fossil fuels can no longer meet carbon emission requirements, and low-carbon and zero-carbon fuels such as methanol, ammonia, and hydrogen have become current research hotspots.

[0003] Methanol fuel has become the mainstream alternative fuel due to its low price and easy modification of old ships. However, due to the low technical maturity of the methanol fuel injection system, the product reliability is poor. In addition, methanol can emulsify lubricating oil, which has the risk of contaminating the entire lubricating oil system, thus causing the entire engine to fail. For ships, the consequences of losing power at sea are extremely fatal.

[0004] In summary, the utility model proposes a methanol pump plunger pair with multi-scheme adaptability, which can meet the technical solutions of various lubricating media and is provided with multi-stage sealing grooves to avoid methanol leakage. Utility Model Content

[0005] The utility model aims to provide a methanol pump plunger pair with multi-scheme adaptability to solve the problem that the traditional methanol pump plunger pair is prone to leakage and methanol contamination when using different lubricating media.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A methanol pump plunger pair with multi-scheme adaptability, comprising a plunger sleeve and a plunger body, wherein a through hole is provided in the plunger sleeve, the plunger body is slidably connected in the through hole, and a methanol pressurizing chamber is provided at the top of the through hole;

[0008] The through hole is provided with a first annular groove, a first sealing groove, a second annular groove and a second sealing groove in sequence from top to bottom;

[0009] A methanol flow channel and a medium flow channel are provided in the plunger sleeve. The methanol flow channel is connected to the first annular groove for discharging the liquid in the first annular groove. The medium flow channel is connected to the second annular groove for introducing lubricating medium into the second annular groove for lubricating the plunger body.

[0010] Furthermore, the outer circumferential surface of the plunger sleeve is provided with a third sealing groove, a third annular groove and a fourth sealing groove in sequence from bottom to top, and the third annular groove is located between the third sealing groove and the fourth sealing groove.

[0011] Furthermore, one end of the medium flow channel is connected to the second annular groove, and the other end of the medium flow channel is connected to the first branch flow channel and the second branch flow channel.

[0012] Furthermore, the first branch flow channel is used to communicate with the top of the plunger sleeve, and the second branch flow channel is used to communicate with the third annular groove.

[0013] Furthermore, when the medium flow channel is used to introduce methanol into the second annular groove to lubricate the plunger body, sealing elements are installed in the second sealing groove, the third sealing groove and the fourth sealing groove.

[0014] Furthermore, when the medium flow channel is used to introduce lubricating oil into the second annular groove to lubricate the plunger body, sealing elements are installed in the first sealing groove, the third sealing groove and the fourth sealing groove.

[0015] Furthermore, one end of the methanol flow channel is connected to the first annular groove, and the other end of the methanol flow channel is connected to the top of the plunger sleeve.

[0016] Furthermore, the lubricating medium is methanol or lubricating oil.

[0017] Beneficial effects of the utility model:

[0018] Since the methanol flow channel and the medium flow channel are provided in the plunger sleeve, excess methanol can flow back and be discharged along the methanol flow channel through the first annular groove; the medium flow channel can introduce a variety of lubricating media through the second annular groove to lubricate the plunger body; the first sealing groove and the second sealing groove can seal the lubricating medium to prevent it from contaminating the methanol fuel or the cam box at the lower end of the plunger, thereby improving the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of a methanol pump plunger pair in one direction with multi-scheme adaptability;

[0020] Figure 2 It is a cross-sectional schematic diagram from another direction of the methanol pump plunger assembly with multi-scheme adaptability.

[0021] Markings and technical features in the figure:

[0022] 1. plunger sleeve; 101. through hole; 102. methanol pressurizing chamber;

[0023] 2. Plunger body; 3. First ring groove; 4. First sealing groove; 5. Second ring groove; 6. Second sealing groove; 7. Methanol flow channel; 8. Third sealing groove; 9. Third ring groove; 10. Fourth sealing groove;

[0024] 11. Medium flow channel; 111. First branch flow channel; 112. Second branch flow channel. DETAILED DESCRIPTION

[0025] The following will refer to the accompanying drawings and preferred embodiments to illustrate the implementation of the utility model. Those skilled in the art can understand other advantages and effects of the utility model from the contents disclosed in this specification. The utility model can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the utility model. It should be understood that the preferred embodiments are only for illustrating the utility model, not for limiting the scope of protection of the utility model.

[0026] It should be noted that when the plunger body 2 slides normally in the plunger sleeve 1, the working principle of the plunger body 2 and the plunger sleeve 1 mainly involves sealing and fluid (the fluid of the utility model is methanol) transmission. They are usually used in pumps, compressors or other hydraulic systems to transport the fluid (methanol) from one place to another. When the system starts working, the plunger body 2 reciprocates in the plunger sleeve 1 under the action of a driving mechanism (such as a camshaft); this movement process can be divided into two main stages: the suction stage and the discharge stage. In the suction stage, the plunger body 2 moves downward, and a certain vacuum or negative pressure is formed in this area (corresponding to the increase in the volume of the methanol pressurizing chamber 102 and the through hole 101 in the following embodiment). At this time, the valve (not shown) connected to the inlet is opened to allow the fluid (methanol) to enter, while the valve (not shown) connected to the outlet is closed to prevent the fluid (methanol) from flowing back. In the discharge stage, the plunger body 2 moves upward, and the fluid (methanol) is compressed and pushed out of the methanol pressurizing chamber 102. At this point, the valve connected to the outlet opens, allowing the fluid (methanol) to flow out, while the valve connected to the inlet closes, preventing the fluid (methanol) from further entering. In this way, the fluid (methanol) is effectively compressed and transported from one place to another.

[0027] This embodiment proposes a methanol pump plunger pair with multi-scheme adaptability, such as Figure 1 and Figure 2 As shown, it comprises a plunger sleeve 1 and a plunger body 2, wherein a through hole 101 is provided in the plunger sleeve 1, and the plunger body 2 is slidably connected in the through hole 101, and a methanol pressurizing chamber 102 is provided at the top of the through hole 101. A first annular groove 3, a first sealing groove 4, a second annular groove 5 and a second sealing groove 6 are provided in the through hole 101 from top to bottom.

[0028] In this embodiment, Figure 1As shown, a methanol flow channel 7 and a medium flow channel 11 are provided in the plunger sleeve 1. One end of the methanol flow channel 7 (i.e., the bottom end of the methanol flow channel 7) is connected to the first annular groove 3 for discharging the liquid in the first annular groove 3. The other end of the methanol flow channel 7 (i.e., the top end of the methanol flow channel 7) is connected to the top of the plunger sleeve 1. When the methanol pump works normally, methanol flows from the oil inlet valve into the methanol pressurizing chamber 102 at the upper end of the plunger. The methanol inside the chamber is pressurized by the reciprocating motion of the plunger. When the pressure reaches the opening pressure of the oil outlet valve, the methanol flows out from the oil outlet valve, thereby providing sufficient high-pressure methanol for the methanol engine. The excess methanol that is not discharged after the stroke is completed can flow back to the methanol fuel tank (not shown) from the first annular groove 3 along the methanol flow channel 7 to achieve recycling.

[0029] In this embodiment, Figure 1 As shown, the medium flow channel 11 is connected to the second annular groove 5, and is used to introduce the lubricating medium into the second annular groove 5 to lubricate the plunger body 2. When the plunger is working, the lubricating medium adhering to the plunger can provide lubrication for the plunger, avoiding dry friction with the plunger sleeve 1 to cause scratch damage to the plunger.

[0030] In this embodiment, Figure 2 As shown, the outer circumferential surface of the plunger sleeve 1 is provided with a third sealing groove 8 , a third annular groove 9 and a fourth sealing groove 10 in sequence from bottom to top, and the third annular groove 9 is located between the third sealing groove 8 and the fourth sealing groove 10 .

[0031] In this embodiment, Figure 2 As shown, one end of the medium flow channel 11 (i.e., the bottom end of the medium flow channel 11) is connected to the second annular groove 5, and the other end of the medium flow channel 11 (i.e., the top end of the medium flow channel 11) is connected to the first branch flow channel 111 and the second branch flow channel 112, wherein the first branch flow channel 111 is used to be connected to the top of the plunger sleeve 1, and the second branch flow channel 112 is used to be connected to the third annular groove 9.

[0032] In this embodiment, the lubricating medium is methanol or lubricating oil. Of course, in some possible embodiments, the lubricating medium may also be diesel or other lubricating substances. When the medium flow channel 11 is used to introduce methanol into the second annular groove 5 to lubricate the plunger body 2, sealing elements are installed in the second sealing groove 6, the third sealing groove 8 and the fourth sealing groove 10. Methanol can self-lubricate the plunger pair, but methanol can emulsify the lubricating oil, which has the risk of contaminating the entire lubricating oil system, thereby causing the entire engine failure. Therefore, it is necessary to install sealing elements in the third sealing groove 8, the fourth sealing groove 10 and the second sealing groove 6 to prevent methanol from contaminating the cam box at the lower end of the plunger. When the medium flow channel 11 is used to introduce lubricating oil into the second annular groove 5 to lubricate the plunger body 2, sealing elements are installed in the first sealing groove 4, the third sealing groove 8 and the fourth sealing groove 10. Sealing rings are installed in the third sealing groove 8 and the fourth sealing groove 10 to prevent methanol and lubricating oil from mixing with each other. The first sealing groove 4 is installed with a sealing ring to prevent methanol and lubricating oil from contaminating each other along the gap between the pairs. In this embodiment, the sealing element is preferably a sealing ring (such as an O-ring or a U-ring) to ensure effective sealing.

[0033] It can be seen from the detailed description of the above embodiments that the plunger sleeve 1 of the utility model is provided with a methanol flow channel 7 and a medium flow channel 11, and excess methanol can flow back and be discharged along the methanol flow channel 7 from the first annular groove 3; the medium flow channel 11 can introduce a variety of lubricating media through the second annular groove 5 to lubricate the plunger body 2, and the first sealing groove 4 and the second sealing groove 6 can seal the lubricating medium to prevent it from contaminating the methanol fuel or the cam box at the lower end of the plunger, thereby improving the reliability and safety of the system.

[0034] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A methanol pump plunger pair with multi-scheme adaptability, comprising a plunger sleeve (1) and a plunger body (2), wherein the plunger sleeve (1) is provided with a through hole (101), the plunger body (2) is slidably connected in the through hole (101), and a methanol pressurizing chamber (102) is provided at the top of the through hole (101), characterized in that: The through hole (101) is provided with a first annular groove (3), a first sealing groove (4), a second annular groove (5) and a second sealing groove (6) in sequence from top to bottom; The plunger sleeve (1) is provided with a methanol flow channel (7) and a medium flow channel (11); the methanol flow channel (7) is connected to the first annular groove (3) and is used to discharge the liquid in the first annular groove (3); the medium flow channel (11) is connected to the second annular groove (5) and is used to introduce a lubricating medium into the second annular groove (5) to lubricate the plunger body (2).

2. The methanol pump plunger pair with multi-scheme adaptability according to claim 1 is characterized in that: The outer peripheral surface of the plunger sleeve (1) is provided with a third sealing groove (8), a third annular groove (9) and a fourth sealing groove (10) in sequence from bottom to top, and the third annular groove (9) is located between the third sealing groove (8) and the fourth sealing groove (10).

3. The methanol pump plunger pair with multi-scheme adaptability according to claim 2, characterized in that: One end of the medium flow channel (11) is connected to the second annular groove (5), and the other end of the medium flow channel (11) is connected to a first branch flow channel (111) and a second branch flow channel (112).

4. The methanol pump plunger pair with multi-scheme adaptability according to claim 3 is characterized in that: The first branch flow channel (111) is used to communicate with the top of the plunger sleeve (1), and the second branch flow channel (112) is used to communicate with the third annular groove (9).

5. The methanol pump plunger pair with multi-scheme adaptability according to claim 2, characterized in that: The medium flow channel (11) is used to introduce methanol into the second annular groove (5) to lubricate the plunger body (2), and sealing elements are installed in the second sealing groove (6), the third sealing groove (8) and the fourth sealing groove (10).

6. The methanol pump plunger assembly with multi-scheme adaptability according to claim 2, characterized in that: The medium flow channel (11) is used to introduce lubricating oil into the second annular groove (5) to lubricate the plunger body (2), and sealing elements are installed in the first sealing groove (4), the third sealing groove (8) and the fourth sealing groove (10).

7. The methanol pump plunger pair with multi-scheme adaptability according to claim 1, characterized in that: One end of the methanol flow channel (7) is connected to the first annular groove (3), and the other end of the methanol flow channel (7) is connected to the top of the plunger sleeve (1).

8. The methanol pump plunger assembly with multi-scheme adaptability according to claim 1, characterized in that: The lubricating medium is methanol or lubricating oil.

Images