Integrally-formed wear-resistant plunger

Abstract

The utility model belongs to the technical field of plunger pumps, and discloses an integrally-formed wear-resistant plunger which comprises a plunger body, a connecting part and a piston, the connecting part is arranged at the end of the plunger body, a connecting disc is installed on the side wall of the piston, the plunger body is installed on the connecting disc through the connecting part, a groove is formed in the side wall, close to the connecting part, of the plunger body, and the connecting disc is arranged in the groove. According to the device, on one hand, the overall weight of the plunger main body can be reduced through the groove, so that the force for driving the plunger main body to move is reduced, and the energy consumption is reduced; and on the other hand, lubricating oil can be filled in the groove, so that the lubricating oil can act on the outer wall of the plunger main body through the oil outlet hole, the abrasion generated by friction between the plunger main body and the plunger sleeve during reciprocating motion is reduced, the abrasion resistance of the device is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically to an integrally molded wear-resistant plunger. Background Technology

[0002] A piston pump is an important component of a hydraulic system. It relies on the reciprocating motion of a piston in a cylinder to change the volume of the sealed working chamber, thereby achieving oil suction and pressure. Piston pumps have advantages such as high rated pressure, compact structure, high efficiency, and convenient flow regulation, and are widely used in high-pressure, high-flow, and flow-adjustable applications.

[0003] When the plunger in the plunger pump reciprocates for a long time, the friction between the plunger and the inner wall of the plunger sleeve increases, which in turn increases the inner diameter of the plunger sleeve. This leads to an increase in the gap between the plunger and the plunger sleeve, causing pressure leakage during the pumping process and affecting the working pressure of the plunger pump.

[0004] Therefore, a plunger with good wear resistance is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an integrally molded wear-resistant plunger to solve the problem mentioned in the background art, where the plunger in a plunger pump undergoes reciprocating motion for a long time, resulting in increased friction between the plunger and the inner wall of the plunger sleeve, which in turn increases the inner diameter of the plunger sleeve. This leads to an increase in the gap between the plunger and the plunger sleeve, causing pressure leakage during the pumping process and affecting the working pressure of the plunger pump.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrally molded wear-resistant plunger, comprising a plunger body, a connecting part and a piston, wherein a connecting part is provided at the end of the plunger body, a connecting plate is installed on the side wall of the piston, and the plunger body is mounted on the connecting plate through the connecting part;

[0007] The plunger body has a groove on the side wall near the connecting part, and the groove is filled with lubricating oil. One end of the connecting rod is installed on the side wall of the connecting plate, and a plug is installed on the other end of the connecting rod. The plug can be inserted into the groove and can seal the groove.

[0008] The plunger body has an oil outlet hole on its side wall, which is connected to the inner cavity of the groove.

[0009] As a preferred embodiment of this utility model, the outer side of the connecting part is provided with an external thread, and the side wall of the connecting disc is provided with a threaded hole, and the connecting part can be installed in the threaded hole by rotating the thread.

[0010] As a preferred embodiment of this utility model, both the sidewalls of the connecting plate and the connecting part are provided with positioning holes, and positioning pins are inserted into the positioning holes. Both the upper and lower ends of the positioning pins are provided with annular grooves, and limit rings are inserted into the annular grooves. The two limit rings are respectively attached to the upper and lower sidewalls of the connecting plate.

[0011] As a preferred embodiment of this utility model, the side wall of the connecting disc is provided with a through hole, a bolt is inserted and installed in the through hole, the side wall of the piston is provided with a threaded hole that mates with the bolt, and the connecting disc is installed on the side wall of the piston by bolts.

[0012] As a preferred embodiment of this utility model, a micro motor is installed on the side wall of the connecting rod, and a lead screw is installed at the output end of the micro motor. The lead screw is inserted into the groove through the side wall of the block. A lead screw sleeve is slidably installed on the outside of the lead screw, and an oil-pushing block is installed on the side wall of the lead screw sleeve. The oil-pushing block is in contact with the inner side wall of the groove.

[0013] As a preferred embodiment of this invention, both the groove and the oil-pushing block have square cross-sections.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this device, by creating grooves on the side wall of the plunger body, the overall weight of the plunger body can be reduced, thereby reducing the force required to drive the plunger body and lowering energy consumption. On the other hand, by filling the grooves with lubricating oil, the lubricating oil can act on the outer wall of the plunger body through the oil outlet, reducing the wear caused by friction between the plunger body and the plunger sleeve during reciprocating motion, thus improving the wear resistance of the device and extending its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this patent;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the plunger body in this patent.

[0018] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle.

[0019] In the diagram: 1. Piston body, 2. Connecting part, 3. Piston, 4. Connecting plate, 5. Groove, 6. Lubricating oil, 7. Connecting rod, 8. Plug, 9. Oil outlet, 10. Threaded hole, 11. Positioning hole, 12. Positioning pin, 13. Annular groove, 14. Limiting ring, 15. Through hole, 16. Bolt, 17. Micro motor, 18. Lead screw, 19. Lead screw sleeve, 20. Oil pusher block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution:

[0022] In this technical solution, an integrally molded wear-resistant plunger includes a plunger body 1, a connecting part 2 and a piston 3. The connecting part 2 is provided at the end of the plunger body 1, and a connecting plate 4 is installed on the side wall of the piston 3. The plunger body 1 is installed on the connecting plate 4 through the connecting part 2.

[0023] The plunger body 1 has a groove 5 on its side wall near the connecting part 2. The groove 5 is filled with lubricating oil 6. One end of the connecting rod 7 is installed on the side wall of the connecting plate 4. The other end of the connecting rod 7 is installed with a plug 8. The plug 8 can be inserted into the groove 5 and can seal the groove 5.

[0024] The side wall of the plunger body 1 is provided with an oil outlet hole 9, which is connected to the inner cavity of the groove 5.

[0025] In this technical solution, the plunger body 1 proposed in this paper is obtained by turning round steel and is a one-piece structure, which can ensure the strength of the plunger body 1. At the same time, the device also has a groove 5 on the side wall of the plunger body 1. On the one hand, it can reduce the overall weight of the plunger body 1, thereby reducing the force required to drive the plunger body 1 and reducing energy consumption. On the other hand, by filling the groove 5 with lubricating oil 6, the lubricating oil 6 can act on the outer wall of the plunger body 1 through the oil outlet 9, thereby reducing the wear caused by friction between the plunger body 1 and the plunger sleeve during the reciprocating motion, thus improving the wear resistance of the device and extending its service life.

[0026] In some technical solutions, the outer side of the connecting part 2 is provided with external threads, and the side wall of the connecting plate 4 is provided with threaded holes 10. The connecting part 2 can be installed in the threaded holes 10 by rotating the threads.

[0027] In this technical solution, the plunger body 1 is installed in the connecting plate 4 through the thread on the connecting part 2, so that it is connected to the piston 3. Driven by the external cam, the piston 3 can drive the plunger body 1 to reciprocate in the plunger sleeve, thereby changing the volume of the sealed working cavity to achieve the operation of oil suction and oil pressure.

[0028] In some technical solutions, both the sidewalls of the connecting plate 4 and the connecting part 2 are provided with positioning holes 11. Positioning pins 12 are inserted into the positioning holes 11. Both the upper and lower ends of the positioning pins 12 are provided with annular grooves 13. Limiting rings 14 are inserted into the annular grooves 13. The two limiting rings 14 are respectively attached to the upper and lower sidewalls of the connecting plate 4.

[0029] In this technical solution, by setting the positioning hole 11 and the positioning pin 12, it is possible to prevent the connecting part 2 from rotating after being installed in the threaded hole 10, which would cause the connection between the plunger body 1 and the connecting plate 4 to become loose.

[0030] In some technical solutions, the side wall of the connecting plate 4 is provided with a through hole 15, and a bolt 16 is inserted into the through hole 15. The side wall of the piston 3 is provided with a threaded hole that mates with the bolt 16. The connecting plate 4 is installed on the side wall of the piston 3 by the bolt 16.

[0031] In some technical solutions, a micro motor 17 is installed on the side wall of the connecting rod 7, and a lead screw 18 is installed at the output end of the micro motor 17. The lead screw 18 passes through the side wall of the block 8 and is inserted into the groove 5. A lead screw sleeve 19 is slidably installed on the outside of the lead screw 18, and an oil pusher 20 is installed on the side wall of the lead screw sleeve 19. The oil pusher 20 fits against the inner side wall of the groove 5.

[0032] In this technical solution, the micro motor 17 is controlled by an external controller, which enables it to drive the lead screw 18 to rotate. When the lead screw 18 rotates, the lead screw sleeve 19 can slide in the groove 5, which drives the oil pusher 20 to move and squeeze the lubricating oil 6, so that the lubricating oil 6 can flow out from the oil outlet 9 to lubricate the plunger body 1 and improve the wear resistance of the plunger body 1.

[0033] In some technical solutions, the cross-sections of both the groove 5 and the oil-pushing block 20 are square.

[0034] In this technical solution, the square groove 5 and the pusher block 20 prevent the pusher block 20 from rotating in the groove 5, thereby preventing the lead screw sleeve 19 from rotating with the lead screw 18, which would cause the pusher block 20 to be unable to move.

[0035] Working principle: The plunger body 1 is installed in the connecting plate 4 through the thread on the connecting part 2, so that it is connected to the piston 3. Under the drive of the external cam, the piston 3 can drive the plunger body 1 to reciprocate in the plunger sleeve, thereby changing the volume of the sealed working cavity to achieve the operation of oil suction and oil pressure.

[0036] During this process, the plunger body 1 will continuously rub against the external plunger sleeve. In order to reduce the wear of the plunger body 1, the micro motor 17 can be controlled to drive the lead screw 18 to rotate, which will drive the oil pusher 20 to move and squeeze the lubricating oil 6 so that the lubricating oil 6 can flow out from the oil outlet 9 to lubricate the plunger body 1. The lubricating oil 6 reduces the wear caused by the friction between the plunger body 1 and the plunger sleeve during the reciprocating motion, thereby improving the wear resistance of the device and extending its service life.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A one-piece molded wear-resistant plunger, comprising a plunger body (1), a connecting part (2), and a piston (3), characterized in that: A connecting part (2) is provided at the end of the plunger body (1), and a connecting plate (4) is installed on the side wall of the piston (3). The plunger body (1) is installed on the connecting plate (4) through the connecting part (2). The plunger body (1) has a groove (5) on its side wall near the connecting part (2). The groove (5) is filled with lubricating oil (6). One end of the connecting rod (7) is installed on the side wall of the connecting plate (4). The other end of the connecting rod (7) is installed with a plug (8). The plug (8) can be inserted into the groove (5) and can seal the groove (5). The plunger body (1) has an oil outlet hole (9) on its side wall, and the oil outlet hole (9) is connected to the inner cavity of the groove (5).

2. The integrally molded wear-resistant plunger according to claim 1, characterized in that: The outer side of the connecting part (2) is provided with an external thread, and the side wall of the connecting plate (4) is provided with a threaded hole (10). The connecting part (2) can be installed in the threaded hole (10) by rotating the thread.

3. The integrally molded wear-resistant plunger according to claim 2, characterized in that: The sidewalls of the connecting plate (4) and the connecting part (2) are provided with positioning holes (11). Positioning pins (12) are inserted into the positioning holes (11). The upper and lower ends of the positioning pins (12) are provided with annular grooves (13). Limiting rings (14) are inserted into the annular grooves (13). The two limiting rings (14) are respectively attached to the upper and lower sidewalls of the connecting plate (4).

4. The integrally molded wear-resistant plunger according to claim 1, characterized in that: The side wall of the connecting plate (4) has a through hole (15), and a bolt (16) is inserted into the through hole (15). The side wall of the piston (3) has a screw hole that mates with the bolt (16). The connecting plate (4) is mounted on the side wall of the piston (3) by the bolt (16).

5. The integrally molded wear-resistant plunger according to claim 1, characterized in that: A micro motor (17) is installed on the side wall of the connecting rod (7). A lead screw (18) is installed at the output end of the micro motor (17). The lead screw (18) is inserted into the groove (5) through the side wall of the block (8). A lead screw sleeve (19) is slidably installed on the outside of the lead screw (18). An oil pusher (20) is installed on the side wall of the lead screw sleeve (19). The oil pusher (20) is in contact with the inner side wall of the groove (5).

6. The integrally molded wear-resistant plunger according to claim 5, characterized in that: Both the groove (5) and the oil-pushing block (20) have square cross-sections.

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