Deviation rectifying plunger structure

Abstract

The invention discloses a deviation rectifying plunger structure and belongs to the technical field of plungers, the deviation rectifying plunger structure comprises a plunger body serving as a mounting carrier, a funnel groove is formed in the tail end of the interior of the plunger body, and a plunger ball head is mounted at the tail end of the plunger body; a plurality of sets of oil inlet holes communicating with the inner bottom of the plunger body are formed in the bottom end of the outer side of the plunger body, and a wall scraping prevention assembly is arranged at the head end of the outer side of the plunger body. According to the oil injection device, the oil injection auxiliary assembly is matched with the cylinder body, it is guaranteed that the plunger body can automatically rectify deviation after entering the cavity of the cylinder body, and the situation that due to friction damage between the plunger body and the inner wall of the cavity of the cylinder body, the sealing performance between the outer wall of the plunger body and the inner wall of the cavity is reduced is avoided; friction between the head end of the plunger body and the inner wall of the cavity is changed into rolling friction from sliding friction, so that the flow output stability of the whole plunger mechanism is further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of plungers, and particularly relates to a deviation-correcting plunger structure. Background Art

[0002] A plunger pump relies on the reciprocating movement of a plunger in a cylinder block to cause the volume of a sealed working chamber to change periodically to achieve the purpose of transporting liquid. The deviation-correcting plunger of a plunger pump is a mechanical component used to achieve precise position control and force transmission, and is commonly used in fields such as hydraulic systems and automation equipment. Among many mechanical devices involving plunger applications, the stable movement of the plunger plays a key role in the performance and lifespan of the equipment.

[0003] Due to factors such as the vibration of the plunger pump during actual operation and the inconsistency of friction between the plunger and the cylinder block, the plunger is extremely likely to shift, which may lead to unstable flow output and reduce the working efficiency of the pump. Moreover, during the reciprocating movement of the plunger, the one-way flow of oil in the plunger body is often achieved through the cooperation of a ball in the plunger body and a funnel groove. After repeated impacts between the ball and the funnel groove, the sealing effect between the ball and the funnel groove may be affected, thereby reducing the flow output effect of the plunger body. At the same time, during the reciprocating movement of the plunger, the negative pressure in the cavity is used to suck hydraulic oil into the cavity through the internal channel of the plunger body. However, when the plunger body reciprocates rapidly, the entry of hydraulic oil into the negative pressure cavity through the oil inlet hole of the plunger may be affected, thereby reducing the usage effect of the plunger mechanism. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a deviation-correcting plunger structure.

[0005] The technical solution adopted to solve the above technical problem is: a deviation-correcting plunger structure, including a plunger body as an installation carrier. A funnel groove is provided at the tail end inside the plunger body. A plunger ball head is installed at the tail end of the plunger body. A plurality of groups of oil inlet holes communicating with the inner bottom of the plunger body are provided at the bottom end outside the plunger body. An anti-scratching wall assembly is provided at the head end outside the plunger body. A deviation-correcting assembly is provided at the bottom end outside the plunger body. A flow guiding assembly is provided inside the plunger body. An anti-backflow assembly cooperating with the flow guiding assembly is provided inside the plunger body. An oil injection assisting assembly is provided at the bottom end outside the plunger body. Anti-leakage assemblies are provided at both the top end and the bottom end outside the plunger body.

[0006] Further, the anti-scratching wall assembly includes a first annular groove provided at the head end outside the plunger body. A first arc surface is provided at the top end outside the first annular groove. Ball grooves are evenly provided outside the first annular groove, and balls are provided inside the ball grooves.

[0007] Through the above technical solution, during the reciprocating movement of the plunger body within the cavity of the cylinder block, once the plunger body is displaced, the ball at the head end of the plunger body can roll on the inner wall of the cavity of the cylinder block, replacing sliding friction with rolling friction, avoiding damage to the plunger body and the inner wall of the cavity of the cylinder block due to sliding friction, and thus ensuring the stability of the plunger body in pushing hydraulic oil.

[0008] Further, the deviation correction assembly includes a second annular groove opened at the outer bottom end of the plunger body. An activity ring is sleeved at one end of the outer side of the second annular groove close to the first annular groove. A first return spring is sleeved on the outer side of the second annular groove, and both ends of the first return spring are fixedly connected to the second annular groove and the bottom of the activity ring respectively.

[0009] Through the above technical solution, when the plunger body is completely inserted into the cavity of the cylinder block, the activity ring abuts against the cylinder block outside the cavity. The cylinder block outside the cavity pushes the activity ring to slide on the second annular groove, and the first return spring is stressed and shortened to store elastic potential energy, which is used for deviation correction during the process of the plunger body completely entering the cavity. The plunger body is highly concentric during operation and does not generate eccentric wear.

[0010] Further, the flow guiding assembly includes a limiting ring installed at the inner bottom of the plunger body. A connecting pipe body is installed inside the plunger body, and cylinders are symmetrically installed at the top and bottom of the connecting pipe body. Spherical grooves are provided at the top and bottom of the cylinders. Oil passage through holes are evenly opened at non - central positions of the cylinders, and a sliding through hole is opened at the central position of the cylinders. The limiting ring is located above the activity ring.

[0011] Through the above technical solution, after the hydraulic oil enters the plunger body through the oil inlet hole, the hydraulic oil will leave the inside of the plunger body through the connecting pipe body and the oil passage through holes on the two groups of cylinders. The limiting ring restricts the position of the cylinders inside the plunger body, the spherical grooves help the hydraulic oil enter the oil passage through holes, and the sliding through hole helps the movable rod slide back and forth stably.

[0012] Further, the oil injection auxiliary assembly includes a first retaining ring and a second retaining ring located at the outer bottom end of the plunger body. The first retaining ring and the second retaining ring are arranged between several groups of oil inlet holes. The first retaining ring is located above the second retaining ring. Second arc surfaces are provided at the edge positions of the tops of the first retaining ring and the second retaining ring. Guide cut surfaces are provided at the bottoms of the inner sides of the first retaining ring and the second retaining ring. The outer diameter of the first retaining ring is larger than that of the second retaining ring.

[0013] Through the above technical solution, during the process of the plunger body being withdrawn from the cylinder cavity, the guiding cutting surfaces at the bottoms of the first retaining ring and the second retaining ring are more conducive to pushing the hydraulic oil into the oil inlet holes. Since the outer diameter of the first retaining ring is larger than that of the second retaining ring, the hydraulic oil can be pushed into the two circles of oil inlet holes. The second arc surfaces on the first retaining ring and the second retaining ring reduce the resistance received by the first retaining ring and the second retaining ring during the process of the plunger body entering the cylinder cavity.

[0014] Furthermore, the anti-backflow assembly includes a movable rod inserted into the two sets of sliding through holes. A blocking sphere that cooperates with the funnel groove is installed at the bottom end of the movable rod. A second return spring is sleeved on the outer side of the bottom end of the movable rod, and the top end of the second return spring is fixedly connected to the bottom of the bottom set of cylinders. A truncated cone blocking block adapted to the spherical groove is installed at the top end of the movable rod, and a truncated cone-shaped groove is opened at the top of the truncated cone blocking block.

[0015] Through the above technical solution, when a negative pressure state exists between the head end of the plunger body and the cavity, it forces the truncated cone blocking block to no longer block the oil passage through holes on the head end set of cylinders. The movable rod slides inside the two sets of sliding through holes, and the blocking sphere does not contact the inner wall of the funnel groove either. The second return spring is stressed and shortened to store elastic potential energy. At this time, the hydraulic oil can pass through the oil inlet holes, the funnel groove, and the inside of the plunger body in sequence, and then enter the cylinder cavity through the oil passage through holes of the top set of cylinders. When the plunger body pushes the hydraulic oil in the cylinder cavity, the truncated cone-shaped groove can also improve the uniform stress of the truncated cone blocking block.

[0016] Furthermore, the anti-leakage assembly includes two sets of annular grooves on the outer side of the plunger body, and guide rings are arranged inside the two sets of annular grooves. The bottom set of the annular grooves is located below the limit ring.

[0017] Through the above technical solution, the two guide rings play a role of support and guidance, protecting the outer sides of the cylinder and the plunger body from being damaged due to friction.

[0018] Furthermore, the second annular groove is located above the oil inlet holes, the two sets of annular grooves are both located above the second annular groove, and the first annular groove is located above the annular grooves.

[0019] Through the above technical solution, the second annular groove being located above the oil inlet holes is more convenient for the cylinder cavity to push the movable ring on the second annular groove to slide. The two sets of annular grooves are both located above the second annular groove, enabling the guide rings to play a role of support and guidance, preventing the plunger body from directly contacting and rubbing against the inner wall of the cylinder during the movement process.

[0020] Further, spiral oil grooves are evenly formed on the surface of the plunger body. The groove depth of the spiral oil grooves is between 1 and 2 mm, and the groove width of the spiral oil grooves is between 2 and 3 mm. The spiral oil grooves are located between two sets of annular clamping grooves.

[0021] Through the above technical solution, the spiral oil grooves can not only ensure the strength of the plunger and avoid affecting its load-bearing capacity, but also give full play to its deviation correction and lubrication functions, and improve the stability of the plunger body during the reciprocating motion.

[0022] Further, there are two circles of oil inlet holes, and the two circles of oil inlet holes are staggered at the bottom outside the plunger body. The oil inlet holes are obliquely formed on the plunger body from outside to inside.

[0023] Through the above technical solution, during the process of the plunger body leaving the cylinder cavity, the obliquely formed multiple groups of oil inlet holes are more conducive to the hydraulic oil entering the inside of the plunger body from the multiple groups of oil inlet holes.

[0024] The beneficial effects of the present invention are as follows: (1) Through the oil injection auxiliary component, during the reciprocating motion of the plunger body, by the cooperation of the oil injection auxiliary component and the cylinder block, it can be ensured that the plunger body can automatically correct its deviation after entering the cylinder cavity, avoiding the friction damage between the plunger body and the inner wall of the cylinder cavity, resulting in the reduction of the sealing performance between the outer wall of the plunger body and the inner wall of the cavity. And a anti-scraping wall component is arranged at the head end of the plunger body, so that even if the plunger body deviates during the process of leaving the cavity, the friction between the head end of the plunger body and the inner wall of the cavity can be changed from sliding friction to rolling friction, which helps to further improve the flow output stability of the entire plunger mechanism; (2) Through the combined use of the diversion component and the anti-backflow component, during the pressurized oil transmission process of the plunger mechanism, the second return spring can move back and forth linearly stably, so that the inner wall of the second return spring can be stably attached to the inner wall of the funnel groove, ensuring the sealing and flow blocking effect between the second return spring and the inner wall of the funnel groove. And the cooperation of the conical plug and the spherical groove can add another flow blocking structure, which can fully avoid the backflow of the hydraulic oil inside the plunger body, and thus ensure the flow output effect of the plunger mechanism; (3) By arranging multiple groups of oil inlet holes in the way of inclined inlets and cooperating with the oil injection auxiliary component, when the plunger mechanism is withdrawn from the cylinder cavity, in addition to using the negative pressure effect to force the hydraulic oil to be sucked into the cylinder cavity from the oil inlet holes, the oil injection auxiliary component can also be used to push the hydraulic oil into the plunger body from the oil inlet holes, so that the hydraulic oil can stably pass through the oil inlet holes and the inside of the plunger body and then enter the cylinder cavity, ensuring the use effect of the plunger mechanism. Description of the Drawings

[0025] Figure 1 is the first perspective structure diagram of the present invention; Figure 2It is the second perspective structure diagram of the present invention; Figure 3 It is the exploded structure diagram of the first perspective of the present invention; Figure 4 It is the exploded structure diagram of the second perspective of the present invention; Figure 5 It is the front view schematic diagram of the present invention; Figure 6 It is the longitudinal section schematic diagram of the present invention; Figure 7 It is the first perspective structure diagram of the plunger body of the present invention; Figure 8 It is the second perspective structure diagram of the plunger body of the present invention; Figure 9 It is the first perspective structure schematic diagram of the diversion mechanism of the present invention; Figure 10 It is the second perspective structure schematic diagram of the diversion mechanism of the present invention; Figure 11 It is the structure schematic diagram of the oil injection auxiliary mechanism of the present invention; Figure 12 It is the first perspective structure diagram of the anti - reflux mechanism of the present invention; Figure 13 It is the second perspective structure diagram of the anti - reflux mechanism of the present invention; Figure 14 It is the present invention Figure 6 The enlarged schematic diagram at position A; Figure 15 It is the present invention Figure 7 The enlarged schematic diagram at position B.

[0026] Reference numerals: 1, plunger body; 2, anti - scraping wall assembly; 201, first annular groove; 202, first arc surface; 203, ball groove; 204, ball; 3, deviation - correcting assembly; 301, second annular groove; 302, movable ring; 303, first return spring; 4, diversion assembly; 401, limiting ring; 402, cylinder; 403, connecting pipe body; 404, spherical groove; 405, oil passage through - hole; 406, sliding through - hole; 5, oil injection auxiliary assembly; 501, first retaining ring; 502, second retaining ring; 503, second arc surface; 504, guiding cutting surface; 6, anti - reflux assembly; 601, movable rod; 602, blocking sphere; 603, second return spring; 604, conical plug; 605, conical groove; 7, anti - leakage assembly; 701, annular clamping groove; 702, guiding ring; 8, spiral oil groove; 9, plunger ball head; 10, funnel groove; 11, oil inlet hole. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] As Figures 1 - 8 and Figures 14 - 15 shown, a deviation-correcting plunger structure of this embodiment includes a plunger body 1 as an installation carrier. A funnel groove 10 is provided at the tail end inside the plunger body 1. A plunger ball head 9 is installed at the tail end of the plunger body 1. An anti-scratch wall assembly 2 is provided at the head end outside the plunger body 1. A deviation-correcting assembly 3 is provided at the bottom end outside the plunger body 1. The anti-scratch wall assembly 2 includes a first annular groove 201 opened at the head end outside the plunger body 1. A first arc surface 202 is provided at the top end outside the first annular groove 201. Ball grooves 203 are evenly opened outside the first annular groove 201, and ball bearings 204 are provided inside the ball grooves 203. The deviation-correcting assembly 3 includes a second annular groove 301 opened at the bottom end outside the plunger body 1. A movable ring 302 is sleeved at one end of the second annular groove 301 close to the first annular groove 201 outside. A first return spring 303 is sleeved outside the second annular groove 301. Both ends of the first return spring 303 are fixedly connected to the bottom of the second annular groove 301 and the movable ring 302 respectively. During the reciprocating movement of the plunger body 1 in the cylinder cavity, once the plunger body 1 is deflected, the ball bearings 204 at the head end of the plunger body 1 can roll on the inner wall of the cylinder cavity, using rolling friction instead of sliding friction to avoid damage to the plunger body 1 and the inner wall of the cylinder cavity due to sliding friction, thereby ensuring the stability of the plunger body 1 in pushing hydraulic oil. When the plunger body 1 is completely inserted into the cylinder cavity, the movable ring 302 abuts against the cylinder outside the cavity, and the cylinder outside the cavity pushes the movable ring 302 to slide on the second annular groove 301. The first return spring 303 is stressed and shortened to store elastic potential energy, and transmits deviation correction during the process of the plunger body 1 completely entering the cavity. The plunger body 1 is highly concentric during operation and does not generate eccentric wear, thereby making the plunger body 1 more stable during the reciprocating movement, reducing the possibility of the plunger body 1 being deflected and the frictional damage caused by the deflection.

[0029] As Figure 1 、 Figure 3 、 Figure 6 、 Figures 9 - 10 and Figures 12 - 14As shown, a diversion component 4 is arranged inside the plunger body 1 of this embodiment, and a backflow prevention component 6 that cooperates with the diversion component 4 is arranged inside the plunger body 1. The diversion component 4 includes a limit ring 401 installed at the inner bottom of the plunger body 1. A connecting pipe body 403 is installed inside the plunger body 1, and cylinders 402 are symmetrically installed at the top and bottom of the connecting pipe body 403. Spherical grooves 404 are arranged at the top and bottom of the cylinder 402. Oil passage through holes 405 are evenly arranged at non-central positions of the cylinder 402, and a sliding through hole 406 is arranged at the central position of the cylinder 402. The limit ring 401 is located above the movable ring 302. The backflow prevention component 6 includes movable rods 601 inserted into the two groups of sliding through holes 406. A blocking sphere 602 that cooperates with the funnel groove 10 is installed at the bottom end of the movable rod 601. A second return spring 603 is sleeved on the outer bottom end of the movable rod 601, and the top end of the second return spring 603 is fixedly connected to the bottom of the bottom cylinder 402. A truncated cone-shaped plug 604 adapted to the spherical groove 404 is installed at the top end of the movable rod 601. A truncated cone-shaped groove 605 is arranged at the top of the truncated cone-shaped plug 604. After the hydraulic oil enters the plunger body 1 through the oil inlet holes 11 and 10, the hydraulic oil will leave the inside of the plunger body 1 through the connecting pipe body 403 and the oil passage through holes 405 on the two groups of cylinders 402. The limit ring 401 restricts the position of the cylinder 402 inside the plunger body 1. The spherical groove 404 helps the hydraulic oil enter the oil passage through hole 405, and the sliding through hole 406 helps the movable rod 601 slide back and forth stably. When a negative pressure state exists between the head end of the plunger body 1 and the cavity, it forces the truncated cone-shaped plug 604 not to block the oil passage through hole 405 on the cylinder 402 at the head end. The movable rod 601 slides inside the two groups of sliding through holes 406, and the blocking sphere 602 does not contact the inner wall of the funnel groove 10. The second return spring 603 is stressed and shortened to store elastic potential energy. At this time, the hydraulic oil can pass through the oil inlet hole 11, the funnel groove 10 and the inside of the plunger body 1 in sequence, and then enter the cylinder cavity through the oil passage through hole 405 of the top cylinder 402. When the plunger body 1 pushes the hydraulic oil in the cylinder cavity, the truncated cone-shaped groove 605 can improve the uniform force on the truncated cone-shaped plug 604.

[0030] As Figures 1 - 5 , Figures 7 - 8 , Figure 11 and Figure 14As shown in the figure, a plurality of groups of oil inlet holes 11 communicating with the inner bottom of the plunger body 1 are provided at the bottom end of the outer side of the plunger body 1 of this embodiment. A fuel injection assisting assembly 5 is arranged at the bottom end of the outer side of the plunger body 1. The fuel injection assisting assembly 5 includes a first retaining ring 501 and a second retaining ring 502 located at the bottom end of the outer side of the plunger body 1. The first retaining ring 501 and the second retaining ring 502 are arranged between a plurality of groups of oil inlet holes 11. The first retaining ring 501 is located above the second retaining ring 502. Second arc surfaces 503 are arranged at the edge positions of the tops of the first retaining ring 501 and the second retaining ring 502. Guide cutting surfaces 504 are arranged at the bottoms of the inner sides of the first retaining ring 501 and the second retaining ring 502. The outer diameter of the first retaining ring 501 is larger than the outer diameter of the second retaining ring 502. There are two circles of oil inlet holes 11, and the two circles of oil inlet holes 11 are staggered at the bottom of the outer side of the plunger body 1. The oil inlet holes 11 are obliquely arranged from the outside to the inside on the plunger body 1. Spiral oil grooves 8 are evenly arranged on the surface of the plunger body 1, and the groove depth of the spiral oil grooves 8 is between 1 - 2 mm, and the groove width of the spiral oil grooves 8 is between 2 - 3 mm. The spiral oil grooves 8 are located between two groups of annular clamping grooves 701. During the process of the plunger body 1 being withdrawn from the cylinder cavity, the guide cutting surfaces 504 at the bottoms of the first retaining ring 501 and the second retaining ring 502 are more helpful for pushing hydraulic oil into the oil inlet holes 11. The outer diameter of the first retaining ring 501 is larger than the outer diameter of the second retaining ring 502, so that the hydraulic oil can be pushed into the two circles of oil inlet holes 11. The second arc surfaces 503 on the first retaining ring 501 and the second retaining ring 502 reduce the resistance received by the first retaining ring 501 and the second retaining ring 502 during the process of the plunger body 1 entering the cylinder cavity. The spiral oil grooves 8 can not only ensure the strength of the plunger and avoid affecting its load-bearing capacity, but also give full play to its deviation correction and lubrication functions, and improve the stability of the plunger body 1 during the reciprocating motion process.

[0031] As Figures 1 - 5 and Figures 7 - 8 shown, anti-leakage assemblies 7 are arranged at both the top end and the bottom end of the outer side of the plunger body 1 of this embodiment. The anti-leakage assemblies 7 include two groups of annular clamping grooves 701 on the outer side of the plunger body 1, and guide rings 702 are arranged inside the two groups of annular clamping grooves 701. The bottom group of annular clamping grooves 701 is located below the limiting ring 401. The second annular groove 301 is located above the oil inlet holes 11. The two groups of annular clamping grooves 701 are both located above the second annular groove 301. The first annular groove 201 is located above the annular clamping grooves 701. The two guide rings 702 are used to play a supporting and guiding role, preventing the plunger body 1 from directly contacting and rubbing against the inner wall of the cylinder during the movement process, and protecting the cylinder and the outer side of the plunger body 1 from being damaged due to friction.

[0032] The working principle of this embodiment is as follows. When the plunger body 1 moves outwards from the cavity of the plunger pump cylinder block, a negative pressure state exists between the head end of the plunger body 1 and the cavity, forcing the frustum-shaped plug 604 to no longer block the oil passage through hole 405 on the set of cylinders 402 at the head end. The movable rod 601 slides inside the two sets of sliding through holes 406, and the blocking sphere 602 also does not contact the inner wall of the funnel groove 10. The second return spring 603 is stressed and shortened to store elastic potential energy. At this time, the inside of the plunger body 1 is also in a negative pressure state, forcing the hydraulic oil to sequentially enter the inside of the plunger body 1 through the oil inlet hole 11 and the funnel groove 10. Then, the hydraulic oil enters the cavity of the cylinder block of the plunger body 1 through the oil passage through hole 405, and part of the hydraulic oil enters the spiral oil groove 8. When the plunger body 1 moves into the cavity of the plunger pump cylinder block, the frustum-shaped plug 604 automatically blocks all the oil passage through holes 405 on the set of cylinders 402 at the top, and the hydraulic oil in the cylinder block cavity is squeezed out. The blocking sphere 602 also tightly abuts against the inner wall of the funnel groove 10. When the plunger body 1 is completely inserted into the cylinder block cavity, the movable ring 302 abuts against the cylinder block outside the cavity. The cylinder block outside the cavity pushes the movable ring 302 to slide on the second annular groove 301, and the first return spring 303 is stressed and shortened to store elastic potential energy, and performs transmission and deviation correction during the process of the plunger body 1 completely entering the cavity. The plunger body 1 is highly concentric during operation and does not generate eccentric wear.

[0033] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A deviation-correcting plunger structure, comprising a plunger body (1) as an installation carrier, a funnel groove (10) is arranged at the tail end inside the plunger body (1), a plunger ball head (9) is installed at the tail end of the plunger body (1), and a plurality of groups of oil inlet holes (11) communicating with the inner bottom of the plunger body (1) are opened at the bottom end outside the plunger body (1), and it is characterized in that: A scratch-proof wall assembly (2) is provided at the head end on the outer side of the plunger body (1), a deviation correction assembly (3) is provided at the bottom end on the outer side of the plunger body (1), a diversion assembly (4) is provided inside the plunger body (1), an anti-backflow assembly (6) that cooperates with the diversion assembly (4) is provided inside the plunger body (1), an oil injection auxiliary assembly (5) is provided at the bottom end on the outer side of the plunger body (1), and anti-leakage assemblies (7) are provided at both the top end and the bottom end on the outer side of the plunger body (1).

2. The deviation-correcting plunger structure according to claim 1, characterized in that The scratch-proof wall assembly (2) includes a first annular groove (201) opened at the head end on the outer side of the plunger body (1), a first arc surface (202) is provided at the top end outside the first annular groove (201), ball grooves (203) are evenly opened outside the first annular groove (201), and balls (204) are provided inside the ball grooves (203).

3. The deviation-correcting plunger structure according to claim 2, characterized in that The deviation correction assembly (3) includes a second annular groove (301) opened at the bottom end on the outer side of the plunger body (1), a movable ring (302) is sleeved at one end of the second annular groove (301) close to the first annular groove (201) on the outside, a first return spring (303) is sleeved outside the second annular groove (301), and both ends of the first return spring (303) are fixedly connected to the bottom of the second annular groove (301) and the movable ring (302) respectively.

4. The deviation-correcting plunger structure according to claim 3, characterized in that The diversion assembly (4) includes a limiting ring (401) installed at the inner bottom of the plunger body (1), a connecting pipe body (403) is installed inside the plunger body (1), and cylinders (402) are symmetrically installed at the top and bottom of the connecting pipe body (403). Spherical grooves (404) are provided at both the top and bottom of the cylinder (402). Oil passage through holes (405) are evenly opened at non-central positions of the cylinder (402), a sliding through hole (406) is opened at the central position of the cylinder (402), and the limiting ring (401) is located above the movable ring (302).

5. The deviation-correcting plunger structure according to claim 1, characterized in that The oil injection auxiliary assembly (5) includes a first retaining ring (501) and a second retaining ring (502) at the bottom end on the outer side of the plunger body (1). The first retaining ring (501) and the second retaining ring (502) are arranged between several groups of oil inlet holes (11). The first retaining ring (501) is located above the second retaining ring (502). Second arc surfaces (503) are provided at the edge positions of the tops of the first retaining ring (501) and the second retaining ring (502). Guide cut surfaces (504) are provided at the bottoms inside the first retaining ring (501) and the second retaining ring (502). The outer diameter of the first retaining ring (501) is larger than the outer diameter of the second retaining ring (502).

6. The deviation-correcting plunger structure according to claim 4, characterized in that The anti-backflow component (6) includes a movable rod (601) inserted into two sets of sliding through holes (406). A blocking sphere (602) that cooperates with the funnel groove (10) is installed at the bottom end of the movable rod (601). A second return spring (603) is sleeved on the outer bottom end of the movable rod (601), and the top end of the second return spring (603) is fixedly connected to the bottom of the bottom set of cylinders (402). A frustum-shaped plug (604) adapted to the spherical groove (404) is installed at the top end of the movable rod (601). A frustum-shaped groove (605) is formed at the top of the frustum-shaped plug (604).

7. The deviation-correcting plunger structure according to claim 4, characterized in that The anti-leakage component (7) includes two sets of annular grooves (701) on the outer side of the plunger body (1), and guide rings (702) are arranged inside the two sets of annular grooves (701). The bottom set of the annular grooves (701) is located below the limit ring (401).

8. The deviation-correcting plunger structure according to claim 7, characterized in that The second annular groove (301) is located above the oil inlet hole (11). The two sets of annular grooves (701) are both located above the second annular groove (301). The first annular groove (201) is located above the annular groove (701).

9. The deviation-correcting plunger structure according to claim 7, characterized in that Spiral oil grooves (8) are evenly formed on the surface of the plunger body (1). The groove depth of the spiral oil grooves (8) is between 1 and 2 mm, and the groove width of the spiral oil grooves (8) is between 2 and 3 mm. The spiral oil grooves (8) are located between the two sets of annular grooves (701).

10. The deviation-correcting plunger structure according to claim 1, characterized in that There are two circles of oil inlet holes (11), and the two circles of oil inlet holes (11) are staggered at the bottom of the outer side of the plunger body (1). The oil inlet holes (11) are inclined from the outside to the inside on the plunger body (1).

Images