A kind of anti-internal leakage plunger pair

Abstract

The utility model discloses an anti-internal leakage plunger pair, including a plunger sleeve, a plunger core and an anti-leakage component, wherein the bottom end of the plunger sleeve is connected with an oil outlet, a plunger core is slidably installed in the inner cavity of the plunger sleeve, an oil inlet is connected on the side wall of the lower section of the plunger sleeve, and an anti-leakage component is installed in the inner cavity of the top end of the plunger sleeve; the anti-leakage component includes an anti-leakage groove, a convex ring is fixedly installed on the bottom wall of the anti-leakage groove, the convex ring is used in conjunction with a sealing ring device, and a compression plug is installed on the top end of the sealing ring device. The plunger pair in the prior art solves the problem that the internal leakage fuel penetrates into other positions of the oil pump, and the plunger pair can prevent internal leakage by setting an annular groove and a sealing ring, but the annular groove of the plunger pair is opened on the inner wall of the plunger sleeve and has a distance from the top end of the plunger sleeve. Therefore, when the diameter of the plunger sleeve is small, it is difficult to clean and maintain the inside of the annular groove.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pairs, in particular to an anti-internal leakage plunger pair. Background Art

[0002] The plunger pair is used in diesel engines. Through the reciprocating motion of the plunger, it provides high-pressure fuel to the engine and is the "heart" of the diesel engine. The existing plunger pair generally includes a plunger and a plunger sleeve. The plunger can reciprocate up and down relative to the plunger sleeve. The plunger is provided with a plunger ring groove, and the plunger sleeve is provided with an oil inlet hole.

[0003] After checking the disclosure (announcement) number: CN214616829U, a plunger pair is disclosed. This technology discloses "including a plunger core and a plunger sleeve, the plunger core is movably inserted into the plunger sleeve, the plunger core can reciprocate up and down relative to the plunger sleeve, the inner wall of the plunger sleeve is provided with an annular groove, a sealing ring is provided in the annular groove, and the sealing ring is sleeved on the plunger core, and the plunger core reciprocates up and down relative to the sealing ring; [0 006] The plunger sleeve is provided with an oil inlet hole and an oil outlet hole. The oil inlet hole is arranged on the upper side wall of the plunger sleeve, and the oil outlet hole is arranged on the upper side wall or the top of the plunger sleeve. The existing plunger pair is improved, mainly in that an annular groove is arranged on the inner wall of the plunger sleeve, a sealing ring is arranged in the annular groove, and the sealing ring is sleeved on the plunger core, and the plunger core reciprocates up and down relative to the sealing ring. With such an arrangement, when in use, the plunger core in the fuel injection pump reciprocates up and down relative to the plunger sleeve, and the oil enters from the oil inlet hole on the plunger sleeve and is discharged through the oil outlet hole. Due to the presence of the sealing ring, the internal leakage fuel is effectively prevented from penetrating into other parts of the oil pump."

[0004] However, the above plunger pair has the following disadvantages:

[0005] 1. Although the plunger pair in the patent solves the problem of internal leakage of fuel oil into other positions of the oil pump, and the plunger pair can prevent internal leakage by providing an annular groove and a sealing ring, the annular groove of the plunger pair is provided on the inner wall of the plunger sleeve and is at a distance from the top of the plunger sleeve. Therefore, when the diameter of the plunger sleeve is small, it is difficult to clean and maintain the inside of the annular groove.

[0006] In order to solve the above problems, the present application proposes an anti-internal leakage plunger pair. Utility Model Content

[0007] In view of the problems in the related art, the utility model provides an anti-internal leakage plunger pair, which can facilitate the cleaning and maintenance of the interior of the anti-leakage groove during maintenance.

[0008] To this end, the specific technical solutions adopted by the utility model are as follows:

[0009] An anti-internal leakage plunger pair, comprising a plunger sleeve, a plunger core and an anti-leakage component, wherein the bottom end of the plunger sleeve is connected with an oil outlet, the plunger core is slidably installed in the inner cavity of the plunger sleeve, the lower section side wall of the plunger sleeve is connected with an oil inlet, and the anti-leakage component is installed in the inner cavity of the top end of the plunger sleeve;

[0010] The anti-leakage component includes an anti-leakage groove, which is arranged on the inner wall of the upper end of the plunger sleeve. A convex ring is fixedly installed on the bottom wall of the anti-leakage groove. The convex ring is used in conjunction with a sealing ring device. A compression plug is installed on the top of the sealing ring device, and the compression plug is threadedly connected to the inner wall of the anti-leakage groove.

[0011] As a further solution of the utility model, the sealing ring device includes a first sealing gasket, the bottom wall of which is provided with a concave ring groove for use with a convex ring, and the top wall of the first sealing gasket is also provided with a concave ring groove.

[0012] As a further solution of the utility model, the concave annular groove on the top wall of the first sealing gasket is used in conjunction with the annular protrusion on the bottom wall of the second sealing gasket, and the top wall of the second sealing gasket is also provided with a concave annular groove.

[0013] As a further solution of the utility model, the concave annular groove on the top wall of the second sealing gasket is used in conjunction with the annular protrusion on the bottom wall of the third sealing gasket, and the top wall of the third sealing gasket is also provided with a concave annular groove.

[0014] As a further solution of the utility model, the concave annular groove on the top wall of the third sealing gasket is used in coordination with the annular protrusion on the bottom wall of the clamping ring.

[0015] As a further solution of the utility model, the bottom end of the clamping plug is pressed against the top wall of the clamping ring.

[0016] As a further solution of the utility model, the middle inner cavity of the compression plug is slidably connected to the plunger core.

[0017] The beneficial effects of the utility model are:

[0018] The utility model cooperates with the plunger sleeve, the plunger core and the anti-leakage component. When in use, the first sealing gasket, the second sealing gasket, the third sealing gasket and the clamping ring in the sealing ring device are first put into the anti-leakage groove in sequence, and then the clamping plug is installed in the anti-leakage groove so that the bottom end thereof is pressed against the clamping ring, and then the plunger core is pushed into the plunger sleeve. When cleaning and maintenance are needed, the user screws out the clamping plug, and then takes out the plunger core and the sealing ring device, so that the plunger sleeve and the anti-leakage groove can be cleaned and maintained conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of an anti-internal leakage plunger pair according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of a plunger sleeve of an anti-internal leakage plunger pair according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of an anti-leakage groove of an anti-internal leakage plunger pair according to an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the cooperation between a compression plug and a sealing ring device of an anti-internal leakage plunger pair according to an embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of an annular protrusion of an anti-internal leakage plunger pair according to an embodiment of the utility model.

[0025] In the figure:

[0026] 1. Plunger sleeve; 2. Plunger core; 3. Leak-proof component; 4. Oil outlet; 5. Oil inlet; 6. Leak-proof groove; 7. Convex ring; 8. Sealing ring device; 81. First sealing gasket; 82. Concave ring groove; 83. Second sealing gasket; 84. Annular protrusion; 85. Third sealing gasket; 86. Compression ring; 9. Compression plug. DETAILED DESCRIPTION

[0027] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0028] According to an embodiment of the utility model, a plunger pair for preventing internal leakage is provided.

[0029] Please refer to the instruction manual Figure 1-5According to an embodiment of the utility model, an anti-internal leakage plunger pair comprises a plunger sleeve 1, a plunger core 2 and an anti-leakage component 3, wherein the bottom end of the plunger sleeve 1 is connected with an oil outlet 4, the plunger core 2 is slidably installed in the inner cavity of the plunger sleeve 1, the lower section side wall of the plunger sleeve 1 is connected with an oil inlet 5, and the top inner cavity of the plunger sleeve 1 is installed with an anti-leakage component 3; the anti-leakage component 3 comprises an anti-leakage groove 6, the anti-leakage groove 6 is arranged on the upper inner wall of the plunger sleeve 1, a convex ring 7 is fixedly installed on the bottom wall of the anti-leakage groove 6, the convex ring 7 is used in conjunction with a sealing ring device 8, a compression plug 9 is installed on the top of the sealing ring device 8, and the compression plug 9 is threadedly connected to the inner wall of the anti-leakage groove 6, and the sealing ring device 8 comprises a first sealing Gasket 81, a concave annular groove 82 is provided on the bottom wall of the first sealing gasket 81 for use in conjunction with the convex ring 7, a concave annular groove 82 is also provided on the top wall of the first sealing gasket 81, the concave annular groove 82 on the top wall of the first sealing gasket 81 is used in conjunction with an annular protrusion 84 on the bottom wall of the second sealing gasket 83, a concave annular groove 82 is also provided on the top wall of the second sealing gasket 83, the concave annular groove 82 on the top wall of the second sealing gasket 83 is used in conjunction with an annular protrusion 84 on the bottom wall of the third sealing gasket 85, a concave annular groove 82 is also provided on the top wall of the third sealing gasket 85, the concave annular groove 82 on the top wall of the third sealing gasket 85 is used in conjunction with an annular protrusion 84 on the bottom wall of the clamping ring 86. The plunger sleeve 1, plunger core 2 and anti-leakage component 3 are arranged to work in coordination. When in use, the first sealing gasket 81, the second sealing gasket 83, the third sealing gasket 85 and the clamping ring 86 in the sealing ring device 8 are first placed into the anti-leakage groove 6 in sequence, and then the clamping plug 9 is installed into the anti-leakage groove 6 so that its bottom end is pressed against the clamping ring 86, and then the plunger core 2 is pushed into the plunger sleeve 1. When cleaning and maintenance are required, the user unscrews the clamping plug 9, and then takes out the plunger core 2 and the sealing ring device 8, so that the plunger sleeve 1 and the anti-leakage groove 6 can be easily cleaned and maintained.

[0030] In one embodiment, please refer to the attached manual. Figure 1 , Figure 2 , Figure 4 and Figure 5 As a further solution of the present invention, the bottom end of the clamping plug 9 is pressed against the top wall of the clamping ring 86. After the clamping plug 9 is set to be pressed against the clamping ring 86, pressure can be applied to the sealing ring at the bottom end of the clamping ring 86 to make it have better sealing performance.

[0031] In one embodiment, please refer to the attached manual. Figure 1 , Figure 2 , Figure 4 and Figure 5As a further solution of the utility model, the middle inner cavity of the compression plug 9 is slidably connected with the plunger core 2, so as to facilitate the installation and use of the plunger core 2.

[0032] Working process: When in use, first put the first sealing gasket 81, the second sealing gasket 83, the third sealing gasket 85 and the clamping ring 86 in the sealing ring device 8 into the leak-proof groove 6 in sequence. In this process, the concave ring groove 82 on the bottom wall of the first sealing gasket 81 is used in conjunction with the convex ring 7 on the bottom wall of the leak-proof groove 6, and then the concave ring groove 82 on the top wall of the first sealing gasket 81 is used in conjunction with the annular protrusion 84 on the bottom wall of the second sealing gasket 83, and then the concave ring groove 82 on the top wall of the second sealing gasket 83 is used in conjunction with the convex ring 7 on the bottom wall of the leak-proof groove 6. The annular protrusions 84 on the bottom walls of the three sealing gaskets 85 are used in conjunction with each other, and then the concave annular groove 82 on the top wall of the third sealing gasket 85 is used in conjunction with the annular protrusion 84 on the bottom wall of the clamping ring 86, and then the clamping plug 9 is installed in the anti-leakage groove 6 so that its bottom end is pressed against the clamping ring 86, and then the plunger core 2 is pushed into the plunger sleeve 1. When cleaning and maintenance are required, the user unscrews the clamping plug 9, and then takes out the plunger core 2 and the sealing ring device 8, so that the plunger sleeve 1 and the anti-leakage groove 6 can be easily cleaned and maintained.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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. An anti-internal leakage plunger pair, comprising a plunger sleeve (1), a plunger core (2) and an anti-leakage component (3), characterized in that: The bottom end of the plunger sleeve (1) is connected to an oil outlet (4), a plunger core (2) is slidably mounted in the inner cavity of the plunger sleeve (1), a lower side wall of the plunger sleeve (1) is connected to an oil inlet (5), and a leak-proof component (3) is mounted in the inner cavity of the top end of the plunger sleeve (1); The anti-leakage component (3) comprises an anti-leakage groove (6), the anti-leakage groove (6) being formed on the inner wall of the upper end of the plunger sleeve (1), a convex ring (7) being fixedly mounted on the bottom wall of the anti-leakage groove (6), the convex ring (7) being used in conjunction with a sealing ring device (8), a compression plug (9) being mounted on the top end of the sealing ring device (8), and the compression plug (9) being threadedly connected to the inner wall of the anti-leakage groove (6).

2. The anti-internal leakage plunger pair according to claim 1, characterized in that: The sealing ring device (8) comprises a first sealing gasket (81), the bottom wall of which is provided with a concave ring groove (82) for use with the convex ring (7), and the top wall of which is also provided with a concave ring groove (82).

3. The anti-internal leakage plunger pair according to claim 2, characterized in that: The concave annular groove (82) on the top wall of the first sealing gasket (81) is used in conjunction with the annular protrusion (84) on the bottom wall of the second sealing gasket (83), and the top wall of the second sealing gasket (83) is also provided with a concave annular groove (82).

4. The anti-internal leakage plunger pair according to claim 3, characterized in that: The concave annular groove (82) on the top wall of the second sealing gasket (83) is used in conjunction with the annular protrusion (84) on the bottom wall of the third sealing gasket (85), and the top wall of the third sealing gasket (85) is also provided with a concave annular groove (82).

5. The anti-internal leakage plunger pair according to claim 4, characterized in that: The concave annular groove (82) on the top wall of the third sealing gasket (85) and the annular protrusion (84) on the bottom wall of the clamping ring (86) are used in coordination.

6. The anti-internal leakage plunger pair according to claim 5, characterized in that: The bottom end of the clamping plug (9) is pressed against the top wall of the clamping ring (86).

7. The anti-internal leakage plunger pair according to claim 1, characterized in that: The middle inner cavity of the compression plug (9) is slidably connected to the plunger core (2).

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