Methanol pump plunger and barrel assembly with multiple anti-leakage structures

Abstract

The methanol pump plunger and barrel assembly with the multiple anti-leakage structures comprises a plunger sleeve and a plunger, a through hole is formed in the plunger sleeve, the plunger 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. A first sealing groove, a second sealing groove, a third sealing groove and a fourth sealing groove are sequentially formed in the peripheral surface of the plunger sleeve from bottom to top; a first ring groove and a second ring groove are sequentially formed in the through hole from top to bottom; a methanol flow channel and a methanol backflow flow channel are formed in the plunger sleeve, and the methanol flow channel communicates with the first ring groove and is used for introducing methanol into the first ring groove to lubricate the plunger; the methanol reflux runner is communicated with the second ring groove and is used for discharging liquid in the second ring groove; the methanol pump plunger and barrel assembly solves the problem that methanol in a traditional methanol pump plunger and barrel assembly is prone to leaking to pollute a lubricating oil system.

Description

Technical Field

[0001] The utility model relates to the technical field of engine components, in particular to a methanol pump plunger pair with a multiple anti-leakage structure. Background Art

[0002] 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.

[0003] In summary, the utility model proposes a methanol pump plunger pair with a multiple anti-leakage structure, and a multi-stage leakage recovery device is provided to prevent methanol from contaminating the lubricating oil system. Utility Model Content

[0004] The utility model aims to provide a methanol pump plunger pair with a multiple anti-leakage structure to solve the problem that the traditional methanol pump plunger pair is prone to methanol leakage and contamination of the lubricating oil system.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A methanol pump plunger pair with a multiple anti-leakage structure, comprising a plunger sleeve and a plunger, wherein the plunger sleeve is provided with a through hole, the plunger is slidably connected in the through hole, and a methanol pressurizing chamber is provided on the top of the through hole, characterized in that: the outer peripheral surface of the plunger sleeve is provided with a first sealing groove, a second sealing groove, a third sealing groove and a fourth sealing groove in sequence from bottom to top;

[0007] The through hole is provided with a first annular groove and a second annular groove in sequence from top to bottom;

[0008] A methanol flow channel and a methanol reflux flow channel are provided in the plunger sleeve. The methanol flow channel is connected to the first annular groove and is used to introduce methanol into the first annular groove to lubricate the plunger; the methanol reflux flow channel is connected to the second annular groove and is used to discharge the liquid in the second annular groove.

[0009] Furthermore, a methanol fuel groove is provided on the outer periphery of the plunger sleeve, and the methanol fuel groove is located between the third sealing groove and the fourth sealing groove.

[0010] 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 a first branch methanol flow channel and a second branch methanol flow channel, the first branch methanol flow channel is used to be connected to the top of the plunger sleeve, and the second branch methanol flow channel is used to be connected to the methanol fuel tank.

[0011] Furthermore, a methanol reflux groove is provided on the outer periphery of the plunger sleeve, and the methanol reflux groove is located between the second sealing groove and the third sealing groove.

[0012] Furthermore, one end of the methanol reflux channel is connected to the methanol reflux groove, and the other end of the methanol reflux channel is connected to the second annular groove.

[0013] Furthermore, it also includes a third annular groove, an abnormal leakage annular groove and an abnormal leakage flow channel, and the third annular groove, the abnormal leakage annular groove and the abnormal leakage flow channel are connected to each other.

[0014] Furthermore, the number of the methanol flow channels is two, and the two methanol flow channels are distributed at 90 degrees along the circumference of the plunger.

[0015] Furthermore, an abnormal leakage annular groove is provided on the outer peripheral surface of the plunger sleeve, and the abnormal leakage annular groove is located between the first sealing groove and the second sealing groove;

[0016] The third annular groove is formed in the plunger sleeve, and the third annular groove is located below the second annular groove, and the third annular groove is communicated with the abnormal leakage flow channel.

[0017] Furthermore, sealing elements are installed in the first sealing groove, the second sealing groove, the third sealing groove and the fourth sealing groove.

[0018] Furthermore, the outer wall of the plunger is also provided with a plurality of plunger lubrication grooves.

[0019] Beneficial effects of the utility model:

[0020] 1. Since the first sealing groove, the second sealing groove, the third sealing groove and the fourth sealing groove are arranged on the outer peripheral surface of the plunger sleeve, methanol is prevented from leaking into the lubrication system through multiple seals, thereby avoiding failure of the entire lubrication system.

[0021] 2. Since the first ring groove, the second ring groove and the third ring groove are provided inside the plunger sleeve, a double-layer anti-leakage ring groove (i.e., the first ring groove and the second ring groove) structure is arranged. When the methanol pump is working, the methanol leaked from the plunger sleeve flows along the inner wall of the plunger sleeve to the second ring groove, and the methanol flows back to the methanol fuel tank through the methanol reflux channel along the second ring groove to realize recycling; if it is detected that the plunger sleeve seal fails or methanol leaks abnormally, causing methanol to flow into the third ring groove, an alarm can be sounded through the sensor at the abnormal methanol leakage hole, and the machine can be stopped for inspection in time, thereby avoiding abnormal leakage of methanol to the lubricating oil, which causes emulsification of the lubricating oil.

[0022] 3. Since two methanol flow channels distributed at 90 degrees are arranged on the plunger sleeve, the plunger can be lubricated and the methanol can flow fully, thereby reducing the temperature rise caused by the work done inside the plunger.

[0023] 4. Since a plurality of plunger lubrication grooves are arranged on the outer wall of the plunger, when the plunger is working, the plunger lubrication grooves can provide lubrication to the plunger, thereby increasing the lubricity of the methanol pump plunger during movement and avoiding dry friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional schematic diagram of a methanol pump plunger pair with a multiple anti-leakage structure in one direction of the utility model;

[0025] Figure 2 It is a cross-sectional schematic diagram of the methanol pump plunger pair with multiple anti-leakage structures of the utility model in another direction;

[0026] Figure 3 It is a partial cross-sectional view of the methanol pump plunger pair with multiple anti-leakage structures of the utility model.

[0027] Markings and technical features in the figure:

[0028] 1. plunger sleeve; 101. through hole; 102. methanol pressurizing chamber;

[0029] 2. methanol flow channel; 201. first branch methanol flow channel; 202. second branch methanol flow channel;

[0030] 3. First ring groove; 4. Second ring groove; 5. Third ring groove; 6. Plunger; 8. First sealing groove; 9. Abnormal leakage ring groove; 10. Second sealing groove; 11. Methanol reflux groove; 12. Third sealing groove; 13. Methanol fuel groove; 14. Fourth sealing groove; 15. Methanol reflux channel; 16. Abnormal leakage channel; 17. Plunger lubrication groove. DETAILED DESCRIPTION

[0031] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention 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 present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0033] It should be noted that when the plunger 6 slides normally in the plunger sleeve 1, the working principle of the plunger 6 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, responsible for transporting the fluid (methanol) from one place to another. When the system starts working, the plunger 6 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 6 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), so that the fluid (methanol) is sucked into the through hole 101 from the first branch methanol flow channel 201. 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 6 moves upward, the fluid (methanol) is compressed and pushed out of the methanol pressurizing chamber 102. At this time, the valve connected to the outlet is opened to allow the fluid (methanol) to flow out, while the valve connected to the inlet is closed to prevent the fluid (methanol) from further entering. In this way, the fluid (methanol) is effectively compressed and transmitted from one place to another.

[0034] This embodiment proposes a methanol pump plunger pair with multiple anti-leakage structures, such as Figure 1 , Figure 2 and Figure 3As shown, it includes a plunger sleeve 1 and a plunger 6. The plunger sleeve 1 is provided with a through hole 101. The plunger 6 is slidably installed in the through hole 101. The top of the through hole 101 is provided with a methanol pressurizing chamber 102. The outer peripheral surface of the plunger sleeve 1 is provided with a first sealing groove 8, a second sealing groove 10, a third sealing groove 12 and a fourth sealing groove 14 from bottom to top.

[0035] Furthermore, if Figure 1 As shown, a methanol fuel groove 13 is provided on the periphery of the plunger sleeve 1, and the methanol fuel groove 13 is located between the third sealing groove 12 and the fourth sealing groove 14; one end of the methanol flow channel 2 (i.e., the bottom end of the methanol flow channel 2) is connected to the first annular groove 3, and the other end of the methanol flow channel 2 (i.e., the top end of the methanol flow channel 2) is connected to the first branch methanol flow channel 201 and the second branch methanol flow channel 202, the first branch methanol flow channel 201 is used to be connected to the top of the plunger sleeve 1, and the second branch methanol flow channel 202 is used to be connected to the methanol fuel groove 13. Figure 3 As shown, the number of methanol flow channels 2 in this embodiment is two, and the two methanol flow channels 2 are distributed at 90 degrees along the circumference of the plunger 6. By providing two methanol flow channels 2 distributed at 90 degrees on the plunger sleeve 1, the plunger 6 can be lubricated, and the methanol can flow fully, thereby reducing the temperature rise caused by the work done by the plunger 6.

[0036] Of course, it is understandable that the number of methanol flow channels 2 is not limited to two. In some possible implementations, the number of methanol flow channels 2 may also be three, four or more, which can be determined according to actual production needs.

[0037] During the entire working process, since the plunger 6 needs to perform piston motion when working, the seal between the plunger 6 and the plunger sleeve 1 will inevitably leak; Figure 1 , Figure 2 and Figure 3 As shown, the through hole 101 is provided with a first annular groove 3 and a second annular groove 4 from top to bottom, and the first annular groove 3 is located above the second annular groove 4; it also includes a methanol flow channel 2 and a methanol reflux flow channel 15, and the methanol flow channel 2 is connected with the first annular groove 3, and is used to introduce methanol into the first annular groove 3 to lubricate the plunger 6. When the booster pump is working, the plunger 6 moves downward, and methanol enters the through hole 101 from the first branch methanol flow channel 201. When leakage occurs, the methanol leaked in the plunger sleeve 1 flows from the first annular groove 3 along the inner wall of the through hole 101 to the second annular groove 4, and the methanol flows back to the methanol fuel tank (not shown) along the second annular groove 4 through the methanol reflux flow channel 15 to achieve recycling.

[0038] like Figure 1 As shown, a methanol reflux groove 11 is provided on the outer periphery of the plunger sleeve 1 , and the methanol reflux groove 11 is located between the second sealing groove 10 and the third sealing groove 12 .

[0039] One end of the methanol reflux channel 15 (i.e. the left end of the methanol reflux channel 15 ) is connected to the methanol reflux groove 11 , and the other end of the methanol reflux channel 15 (i.e. the right end of the methanol reflux channel 15 ) is connected to the second annular groove 4 .

[0040] like Figure 2 As shown, this embodiment also includes a third annular groove 5, an abnormal leakage annular groove 9 and an abnormal leakage flow channel 16, and the third annular groove 5, the abnormal leakage annular groove 9 and the abnormal leakage flow channel 16 are interconnected. Among them, the abnormal leakage annular groove 9 is provided on the outer peripheral surface of the plunger sleeve 1, and the abnormal leakage annular groove 9 is located between the first sealing groove 8 and the second sealing groove 10; the third annular groove 5 is provided in the plunger sleeve 1, and the third annular groove 5 is located below the second annular groove 4, and the third annular groove 5 is connected to the abnormal leakage flow channel 16. The abnormal leakage flow channel 16 is externally connected to a sensor (not shown), and the sensor alarms when methanol flows out of the abnormal leakage flow channel 16. When the plunger 6 and the plunger sleeve 1 have a relatively serious leakage (such as failure of the seal of the plunger sleeve 1 or abnormal leakage of methanol), methanol enters the third annular groove 5 through the first annular groove 3 and the second annular groove 4. At this time, the methanol in the third annular groove 5 flows out through the abnormal leakage flow channel 16, and the sensor alarms to remind the staff to stop the machine for inspection in time, thereby avoiding abnormal leakage of methanol to the lubricating oil system, resulting in emulsification of the lubricating oil.

[0041] Furthermore, sealing elements are installed in the first sealing groove 8, the second sealing groove 10, the third sealing groove 12 and the fourth sealing groove 14. In this embodiment, the sealing element is preferably a sealing ring (such as an O-ring or a U-ring) to ensure effective sealing.

[0042] like Figure 2 As shown, a plurality of plunger lubrication grooves 17 are provided at intervals in the outer wall of the plunger 6. In this embodiment, a plurality of plunger lubrication grooves 17 are provided on the outer wall of the plunger 6. When the plunger 6 is working, the methanol adhered to the plunger lubrication grooves 17 can provide lubrication for the plunger 6, thereby increasing the lubricity of the methanol pump plunger 6 during movement and avoiding scratch damage to the plunger 6 caused by dry friction.

[0043] 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 a multiple anti-leakage structure, comprising a plunger sleeve (1) and a plunger (6), wherein the plunger sleeve (1) is provided with a through hole (101), the plunger (6) 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 outer peripheral surface of the plunger sleeve (1) is provided with a first sealing groove (8), a second sealing groove (10), a third sealing groove (12) and a fourth sealing groove (14) in sequence from bottom to top; The through hole (101) is provided with a first annular groove (3) and a second annular groove (4) in sequence from top to bottom; The plunger sleeve (1) is provided with a methanol flow channel (2) and a methanol reflux flow channel (15); the methanol flow channel (2) is connected to the first annular groove (3) and is used to introduce methanol into the first annular groove (3) to lubricate the plunger (6); the methanol reflux flow channel (15) is connected to the second annular groove (4) and is used to discharge liquid in the second annular groove (4).

2. The methanol pump plunger pair with multiple anti-leakage structures according to claim 1, characterized in that: A methanol fuel groove (13) is provided on the outer periphery of the plunger sleeve (1), and the methanol fuel groove (13) is located between the third sealing groove (12) and the fourth sealing groove (14).

3. The methanol pump plunger pair with multiple anti-leakage structures according to claim 2, characterized in that: One end of the methanol flow channel (2) is connected to the first annular groove (3), and the other end of the methanol flow channel (2) is connected to a first branch methanol flow channel (201) and a second branch methanol flow channel (202), wherein the first branch methanol flow channel (201) is used to be connected to the top of the plunger sleeve (1), and the second branch methanol flow channel (202) is used to be connected to the methanol fuel tank (13).

4. The methanol pump plunger pair with a multiple anti-leakage structure according to any one of claims 1 or 3, characterized in that: A methanol reflux groove (11) is provided on the outer periphery of the plunger sleeve (1), and the methanol reflux groove (11) is located between the second sealing groove (10) and the third sealing groove (12).

5. The methanol pump plunger pair with multiple anti-leakage structures according to claim 4, characterized in that: One end of the methanol reflux channel (15) is connected to the methanol reflux groove (11), and the other end of the methanol reflux channel (15) is connected to the second annular groove (4).

6. The methanol pump plunger pair with multiple anti-leakage structures according to claim 5, characterized in that: It also comprises a third annular groove (5), an abnormal leakage annular groove (9) and an abnormal leakage flow channel (16), wherein the third annular groove (5), the abnormal leakage annular groove (9) and the abnormal leakage flow channel (16) are interconnected.

7. The methanol pump plunger pair with multiple anti-leakage structures according to claim 6, characterized in that: An abnormal leakage annular groove (9) is formed on the outer peripheral surface of the plunger sleeve (1), and the abnormal leakage annular groove (9) is located between the first sealing groove (8) and the second sealing groove (10); The third annular groove (5) is formed in the plunger sleeve (1), and the third annular groove (5) is located below the second annular groove (4), and the third annular groove (5) is connected to the abnormal leakage flow channel (16).

8. The methanol pump plunger pair with multiple anti-leakage structures according to claim 4, characterized in that: Sealing elements are installed in the first sealing groove (8), the second sealing groove (10), the third sealing groove (12) and the fourth sealing groove (14).

9. The methanol pump plunger pair with multiple anti-leakage structures according to claim 1, characterized in that: The number of the methanol flow channels (2) is two, and the two methanol flow channels (2) are distributed at 90 degrees along the circumference of the plunger (6).

10. The methanol pump plunger pair with multiple anti-leakage structures according to claim 1, characterized in that: The outer wall of the plunger (6) is also provided with a plurality of plunger lubrication grooves (17).

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