Steel sleeve rolling self-tightening device for high-pressure plunger pump

Abstract

The present invention discloses a steel sleeve rolling self-tightening device for a high-pressure plunger pump, comprising: a mounting base, a first fixed seat, a second fixed seat, a roller frame, a first driving device, a first driving mechanism, a second driving device, a second driving mechanism, a steel sleeve assembly, and a roller assembly; the first fixed seat and the second fixed seat are mounted on the mounting base; the roller frame is sleeved outside the first fixed seat and the second fixed seat and is slidably connected thereto; the first driving device is mounted on the mounting base and is connected to the first driving mechanism; the second driving device is mounted on the mounting base and is connected to the second driving mechanism; the steel sleeve assembly is rotatably connected to the first fixed seat and the second fixed seat; the roller assembly can pass through the steel sleeve assembly and is rotatably connected to the roller frame. The steel sleeve rolling self-tightening device for a high-pressure plunger pump disclosed by the present invention has a relatively low cost and has general applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of self-tightening devices for steel sleeves of high-pressure plunger pumps, and particularly to a rolling self-tightening device for steel sleeves of high-pressure plunger pumps. Background Art

[0002] Since the high-pressure steel sleeve in a high-pressure plunger pump is constantly subjected to the action of reciprocating high and low pressure stresses, the strength and service life of the high-pressure steel sleeve are important factors in ensuring the quality of the high-pressure plunger pump.

[0003] The means of improving the strength of the high-pressure steel sleeve is similar to the principle of autofrettage of gun barrels. At present, for the autofrettage of high-pressure steel sleeves, hydraulic autofrettage and mechanical autofrettage are mostly used. However, the hydraulic autofrettage technology has high costs and requires sealing treatment of the steel sleeve. Sealing is difficult when the autofrettage pressure is high, so the hydraulic autofrettage method is not suitable. The mechanical autofrettage device has poor universality and is not conducive to wide use. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present invention provides a rolling self-tightening device for a steel sleeve of a high-pressure plunger pump.

[0005] According to the first aspect of the embodiments disclosed by the present invention, a rolling self-tightening device for a steel sleeve of a high-pressure plunger pump is provided, including: a mounting base, a first fixing seat, a second fixing seat, a roller frame, a first driving device, a first driving mechanism, a second driving device, a second driving mechanism, a steel sleeve assembly, and a roller assembly;

[0006] The first fixing seat is mounted on the mounting base;

[0007] The second fixing seat is mounted on the mounting base, and the second fixing seat is arranged parallel to the first fixing seat;

[0008] The roller frame is sleeved outside the first fixing seat and the second fixing seat, and the roller frame is slidably connected to the first fixing seat and the second fixing seat;

[0009] The first driving device is located on one side of the first fixing seat away from the second fixing seat and is mounted on the mounting base;

[0010] The first driving mechanism is mounted on the surface of the first fixing seat close to the second fixing seat and is connected to the first driving device;

[0011] The second driving device is located on one side of the second fixing seat away from the first fixing seat and is mounted on the mounting base;

[0012] The second driving mechanism is mounted on the roller frame and is connected to the second driving device;

[0013] The steel sleeve assembly is located between the first fixed seat and the second fixed seat. After one end of the steel sleeve assembly is connected to the first driving mechanism, it is rotatably connected to the first fixed seat, and the other end of the steel sleeve assembly is rotatably connected to the second fixed seat;

[0014] One end of the roller assembly is rotatably connected to one side wall of the roller frame. After the other end of the roller assembly passes through the inside of the steel sleeve assembly, it is rotatably connected to the other side wall of the roller frame.

[0015] Further, the first fixed seat has an L-shaped structure. One side wall of the first fixed seat is parallel to the mounting base and is connected to the mounting base, and the other side wall of the first fixed seat is perpendicular to the mounting base; a first slideway is provided on the side wall of the first fixed seat parallel to the mounting base, and the first slideway is laid along the length direction of the first fixed seat; a first communication hole and a second communication hole are provided on the side wall of the first fixed seat perpendicular to the mounting base.

[0016] Further, the second fixed seat has an L-shaped structure. One side wall of the second fixed seat is parallel to the mounting base and is connected to the mounting base, and the other side wall of the second fixed seat is perpendicular to the mounting base; a second slideway is provided on the side wall of the second fixed seat parallel to the mounting base, and the second slideway is laid along the length direction of the second fixed seat; a third communication hole is provided on the side wall of the second fixed seat perpendicular to the mounting base, and the third communication hole is coaxially arranged with the second communication hole.

[0017] Further, the roller frame has a U-shaped structure. A first slider and a fourth communication hole are provided on one side wall of the roller frame. The first slider is located below one side wall of the roller frame and is laid along the length direction of one side wall of the roller frame; the first slider is slidably connected to the first slideway, and the fourth communication hole is coaxially arranged with the second communication hole; a second slider and a fifth communication hole are provided on the other side wall of the roller frame. The second slider is located below the other side wall of the roller frame and is laid along the length direction of the other side wall of the roller frame; the second slider is slidably connected to the second slideway, and the fifth communication hole is coaxially arranged with the third communication hole.

[0018] Further, the steel sleeve assembly includes a high-pressure steel sleeve, a first flange, a limiting bushing, a first bearing, a second flange and a second bearing; the first bearing is disposed in the second communication hole, and the second bearing is disposed in the third communication hole; both ends of the high-pressure steel sleeve are respectively connected to the first flange and the second flange, the first flange is rotatably connected to the first fixed seat through the first bearing; the second flange is rotatably connected to the second fixed seat through the second bearing; the limiting bushing is located between the high-pressure steel sleeve and the first fixed seat and is sleeved outside the neck of the first flange.

[0019] Further, the first driving mechanism includes a first gear and a second gear; the first gear is connected to the output end of the first driving device through the first communication hole; the second gear is located between the limiting bushing and the high-pressure steel sleeve and is sleeved outside the neck of the first flange; the second gear meshes with the first gear.

[0020] Further, the second driving mechanism includes a third gear and a rack; the rack is installed on the side wall of the roller frame perpendicular to the mounting base, the third gear is connected to the output end of the second driving device and meshes with the rack.

[0021] Further, the roller assembly includes a roller, a third bearing, a third bearing cover, a fourth bearing and a fourth bearing cover; the third bearing is disposed in the fourth communication hole, the third bearing cover is connected to the roller frame and abuts against the third bearing; the fourth bearing is disposed in the fifth communication hole, the fourth bearing cover is connected to the roller frame and abuts against the fourth bearing; one end of the roller is rotatably connected to the roller frame through the fourth bearing, and the other end of the roller passes through the inside of the steel sleeve assembly and is rotatably connected to the roller frame through the third bearing.

[0022] The technical solutions provided by the disclosed embodiments of the present invention may include the following beneficial effects:

[0023] The steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by the disclosed embodiments of the present invention causes a certain amount of plastic deformation on the inner wall of the high-pressure steel sleeve through the rolling action of the roller on the inner wall of the high-pressure steel sleeve, achieving the purpose of self-tightening; thereby achieving the purpose of improving the strength of the high-pressure steel sleeve and increasing the service life of the high-pressure steel sleeve; in addition, the components used in the steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by the disclosed embodiments of the present invention are all conventional components, so the cost is relatively low and it has general applicability.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory and should not limit the disclosure of the present invention. Brief Description of the Drawings

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic structural diagram of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention at a first angle;

[0028] Figure 2 A schematic structural diagram of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention at a second angle;

[0029] Figure 3 A schematic structural diagram of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention at a third angle;

[0030] Figure 4 A cross-sectional view of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided in an embodiment of the present invention.

[0031] Figure markings: 100-mounting base; 200-first fixed seat; 210-first slide; 300-second fixed seat; 310-second slide; 400-roller frame; 410-first slider; 420-second slider; 500-first driving mechanism; 510-first gear; 520-second gear; 600-second driving mechanism; 610-third gear; 620-rack; 700-steel sleeve assembly; 710-high-pressure steel sleeve; 720-first flange; 730-limiting sleeve; 740-first bearing; 750-second flange; 760-second bearing; 800-roller assembly; 810-roller; 820-third bearing; 830-third bearing cover; 840-fourth bearing; 850-fourth bearing cover; 900-first driving device; 1000-second driving device. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0033] Figure 1 A schematic structural diagram of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention at a first angle is shown; Figure 2 A schematic structural diagram of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention at a second angle is shown; Figure 3 A schematic structural diagram of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention at a third angle is shown; Figure 4 A cross-sectional view of a steel sleeve rolling self-tightening device for a high-pressure plunger pump provided by an embodiment of the present invention is shown.

[0034] Specifically, if Figures 1-4 As shown, the steel sleeve rolling self-tightening device for a high-pressure plunger pump provided in this embodiment includes: a mounting base 100, a first fixed base 200, a second fixed base 300, a roller frame 400, a first driving device 900, a first driving mechanism 500, a second driving device 1000, a second driving mechanism 600, a steel sleeve assembly 700, and a roller assembly 800; the first fixed base 200 is mounted on the mounting base 100; the second fixed base 300 is mounted on the mounting base 100, and the second fixed base 300 is arranged parallel to the first fixed base 200; the roller frame 400 is sleeved on the outside of the first fixed base 200 and the second fixed base 300, and the roller frame 400 is slidably connected to the first fixed base 200 and the second fixed base 300; the first driving device 900 is located on the side of the first fixed base 200 away from the second fixed base 300, and is mounted on the mounting base 100; the second fixed base 300 is mounted on the mounting base 100, and the second fixed base 300 is arranged parallel to the first fixed base 200 A driving mechanism 500 is installed on a surface of the first fixed seat 200 close to the second fixed seat 300 and is connected to the first driving device 900; the second driving device 1000 is located on the side of the second fixed seat 300 away from the first fixed seat 200 and is installed on the mounting base 100; the second driving mechanism 600 is installed on the roller frame 400 and is connected to the second driving device 1000; the steel sleeve assembly 700 is located between the first fixed seat 200 and the second fixed seat 300, and after one end of the steel sleeve assembly 700 is connected to the first driving mechanism 500, it is rotatably connected to the first fixed seat 200, and the other end of the steel sleeve assembly 700 is rotatably connected to the second fixed seat 300; one end of the roller assembly 800 is rotatably connected to one side wall of the roller frame 400, and the other end of the roller assembly 800 passes through the interior of the steel sleeve assembly 700 and is rotatably connected to the other side wall of the roller frame 400.

[0035] The mounting base 100 can be a polygonal shape such as a rectangle, a square or a circle. In this embodiment, a rectangle is taken as an example; mounting base plates are provided at the four corners of the mounting base 100, mounting screw holes are provided on the mounting base plates, and the mounting base 100 is fixed to the ground by bolts; the mounting base 100 includes four spaced-apart square tubes; the first driving device 900 is screwed on the first square tube of the mounting base 100, the first fixing seat 200 is screwed on the second square tube, the second fixing seat 300 is screwed on the third square tube, and the second driving device 1000 is screwed on the fourth square tube.

[0036] Specifically, the first fixed base 200 has an L-shaped structure, one side wall of the first fixed base 200 is parallel to the mounting base 100 and connected to the mounting base 100, and the other side wall of the first fixed base 200 is perpendicular to the mounting base 100; a first slide 210 is provided on the side wall of the first fixed base 200 parallel to the mounting base 100, and the first slide 210 is laid along the length direction of the first fixed base 200; a first connecting hole and a second connecting hole are opened on the side wall of the first fixed base 200 perpendicular to the mounting base 100.

[0037] The first fixing base 200 is screwed onto the mounting base 100 parallel to a side wall of the mounting base 100, thereby fixing the first fixing base 200; a first slideway 210 is screwed above the side wall of the first fixing base 200 parallel to the mounting base 100; the first connecting hole and the second connecting hole are through holes that pass through both sides of the side wall of the first fixing base 200 perpendicular to the mounting base 100.

[0038] Specifically, the second fixed seat 300 has an L-shaped structure, one side wall of the second fixed seat 300 is parallel to the mounting base 100 and connected to the mounting base 100, and the other side wall of the second fixed seat 300 is perpendicular to the mounting base 100; a second slide 310 is provided on the side wall of the second fixed seat 300 parallel to the mounting base 100, and the second slide 310 is laid along the length direction of the second fixed seat 300; a third connecting hole is opened on the side wall of the second fixed seat 300 perpendicular to the mounting base 100, and the third connecting hole is coaxially arranged with the second connecting hole.

[0039] The second fixing base 300 is screwed onto the mounting base 100 parallel to a side wall of the mounting base 100, thereby fixing the second fixing base 300; a second slideway 310 is screwed above the second fixing base 300 parallel to a side wall of the mounting base 100; the third connecting hole is a through hole that passes through both sides of the side wall of the second fixing base 300 perpendicular to the mounting base 100.

[0040] Specifically, the roller frame 400 has a U-shaped structure, and a first slider 410 and a fourth connecting hole are provided on one side wall of the roller frame 400. The first slider 410 is located below one side wall of the roller frame 400 and is laid along the length direction of one side wall of the roller frame 400; the first slider 410 is slidingly connected to the first slide 210, and the fourth connecting hole is coaxially arranged with the second connecting hole; a second slider 420 and a fifth connecting hole are provided on the other side wall of the roller frame 400, and the second slider 420 is located below the other side wall of the roller frame 400 and is laid along the length direction of the other side wall of the roller frame 400; the second slider 420 is slidingly connected to the second slide 310, and the fifth connecting hole is coaxially arranged with the third connecting hole.

[0041] The sizes of the first slider 410 and the second slider 420 provided on the roller frame 400 should match the sizes of the first slide 210 and the second slide 310, so that the roller frame 400 can slide horizontally relative to the first fixed seat 200 and the second fixed seat 300 without shaking; the first slider 410 and the second slider 420 each include two slider sections, which are respectively screwed to the longitudinal direction of one side wall of the roller frame 400 in the front and rear directions. This design is adopted because the side wall of the roller frame 400 is long, and the two-section structure can ensure the stability of the roller frame 400 during horizontal sliding; the second connecting hole, the third connecting hole, the fourth connecting hole and the fifth connecting hole are opened at the same position. The positions should correspond to each other so that the steel sleeve assembly 700 can be installed, and at the same time, it is ensured that the roller assembly 800 can pass through the second connecting hole, the third connecting hole, the fourth connecting hole and the fifth connecting hole at the same time; the second connecting hole, the third connecting hole, the fourth connecting hole and the fifth connecting hole remain coaxial, which is the state maintained when the roller assembly 800 is installed. When the roller frame 400 slides horizontally relative to the first fixed seat 200 and the second fixed seat 300, the coaxial position of the second connecting hole and the fourth connecting hole changes, and the coaxial position of the third connecting hole and the fifth connecting hole changes, but the second connecting hole and the third connecting hole are still coaxially arranged, and the fourth connecting hole and the fifth connecting hole are still coaxially arranged.

[0042] Specifically, the steel sleeve assembly 700 includes a high-pressure steel sleeve 710, a first flange 720, a limiting sleeve 730, a first bearing 740, a second flange 750 and a second bearing 760; the first bearing 740 is arranged in the second connecting hole, and the second bearing 760 is arranged in the third connecting hole; the two ends of the high-pressure steel sleeve 710 are respectively connected to the first flange 720 and the second flange 750, and the first flange 720 is rotatably connected to the first fixed seat 200 through the first bearing 740; the second flange 750 is rotatably connected to the second fixed seat 300 through the second bearing 760; the limiting sleeve 730 is located between the high-pressure steel sleeve 710 and the first fixed seat 200, and is sleeved on the outside of the neck of the first flange 720.

[0043] The high-pressure steel sleeve 710 is a steel sleeve required for use during the operation of the high-pressure plunger pump; the first bearing 740 is interference-fitted in the second connecting hole, and the second bearing 760 is interference-fitted in the third connecting hole. The first flange 720 and the second flange 750 both adopt long-neck flanges. One end of the high-pressure steel sleeve 710 is screwed to the first flange 720, and the neck of the first flange 720 faces the first fixed seat 200. After the neck of the first flange 720 is connected to the first driving mechanism 500, the limiting sleeve 730 is sleeved on the neck of the first flange 720, and finally the neck of the first flange 720 is interference-fitted with the inner wall of the first bearing 740; the other end of the high-pressure steel sleeve 710 is screwed to the second flange 750, and the neck of the second flange 750 faces the second fixed seat 300, and the neck of the second flange 750 is interference-fitted with the inner wall of the second bearing 760.

[0044] Specifically, the first driving mechanism 500 includes a first gear 510 and a second gear 520; the first gear 510 is connected to the output end of the first driving device 900 through a first connecting hole; the second gear 520 is located between the limiting sleeve 730 and the high-pressure steel sleeve 710, and is sleeved on the outside of the neck of the first flange 720; the second gear 520 is meshed with the first gear 510.

[0045] The first drive device 900 includes a YDS low-speed motor, a coupling, a rotating shaft, a bearing, and a sleeve. The motor shaft of the YDS low-speed motor is connected to the rotating shaft via the coupling. The bearing is interference-fitted in the first connecting hole. The rotating shaft and the bearing are interference-fitted and pass through the first connecting hole. The first gear 510 is key-connected to the rotating shaft. The sleeve is located between the first fixing seat 200 and the first gear 510 and is sleeved on the rotating shaft to limit axial displacement of the first gear 510. When the YDS low-speed motor is operating, the rotating shaft rotates and drives the first gear 510 to rotate. When installing the second gear 520, on the one hand: The limiting sleeve 730 is against the side surface of the first bearing 740, and the second gear 520 is clamped by the limiting sleeve 730 and the flange plate of the first flange 720 when it is keyed to the neck of the first flange 720, that is, no axial displacement occurs when the second gear 520 rotates; on the other hand, the second gear 520 is engaged with the first gear 510, that is, when the first gear 510 rotates under the drive of the YDS low-speed motor, it can drive the second gear 520 to rotate, thereby driving the high-pressure steel sleeve 710 to rotate; due to the use of the YDS low-speed motor, the rotation speed can be controlled, and low-speed rotation can be achieved without the use of a reducer.

[0046] Specifically, the second driving mechanism 600 includes a third gear 610 and a rack 620; the rack 620 is mounted on the side wall of the roller frame 400 perpendicular to the mounting base 100, and the third gear 610 is connected to the output end of the second driving device 1000 and meshes with the rack 620.

[0047] The second driving device 1000 includes a YDS low-speed motor, a coupling and a rotating shaft. The motor shaft of the YDS low-speed motor is connected to the rotating shaft through a coupling. The third gear 610 is keyed to the rotating shaft. After the YDS low-speed motor is working, the rotating shaft rotates and drives the third gear 610 to rotate; the rack 620, the third gear 610 and the second driving device 1000 are located on the same side of the roller frame 400. The rack 620 is screwed on the side wall of the roller frame 400 and laid along the length direction of the side wall; the third gear 610 is engaged with the rack 620. When the third gear 610 rotates under the drive of the YDS low-speed motor, since the position of the YDS low-speed motor is fixed, under the drive of the second driving mechanism 600, the roller frame 400 can move along the track direction relative to the fixed first fixed seat 200 and the second fixed seat 300.

[0048] Specifically, the roller assembly 800 includes a roller 810, a third bearing 820, a third bearing cover 830, a fourth bearing 840 and a fourth bearing cover 850; the third bearing 820 is arranged in the fourth connecting hole, the third bearing cover 830 is connected to the roller frame 400, and abuts against the third bearing 820; the fourth bearing 840 is arranged in the fifth connecting hole, the fourth bearing cover 850 is connected to the roller frame 400, and abuts against the fourth bearing 840; one end of the roller 810 is rotatably connected to the roller frame 400 through the fourth bearing 840, and the other end of the roller 810 passes through the interior of the steel sleeve assembly 700, and is rotatably connected to the roller frame 400 through the third bearing 820.

[0049] The third bearing 820 is interference fitted in the fourth connecting hole, and the third bearing cover 830 is screwed on the roller frame 400 to limit the axial displacement of the third bearing 820; the fourth bearing 840 is interference fitted in the fifth connecting hole, and the fourth bearing cover 850 is screwed on the roller frame 400 to limit the axial displacement of the fourth bearing 840; when installing the roller 810, the roller 810 is first passed through the fourth bearing 840 in the fifth connecting hole, the interior of the second flange 750, the interior of the high-pressure steel sleeve 710, the interior of the first flange 720 and the third bearing 820 in the fourth connecting hole in sequence to ensure that the roller 810 can rotate relative to the high-pressure steel sleeve 710 and the roller frame 400; the roller 810 is designed as a rotatable structure, which is convenient for converting sliding friction into rolling friction when the roller 810 contacts the high-pressure steel sleeve 710, thereby reducing friction loss. In addition, it can avoid circumferential movement of the plastic layer caused by sliding.

[0050] The assembly steps of the steel sleeve rolling self-tightening device for a high-pressure plunger pump provided in this embodiment are as follows: The first step: Fix the installation base 100 on the ground and install the first fixing seat 200; The second step: First install the first bearing 740, then install the first flange 720 and the second flange 750 at both ends of the high-pressure steel sleeve 710, then sequentially sleeve the second gear 520 and the limit bushing 730 on the neck of the first flange 720, and finally fix the high-pressure steel sleeve 710 on the first fixing seat 200; The third step: First install the second bearing 760, then connect the second fixing seat 300 with the high-pressure steel sleeve 710 and fix the second fixing seat 300 on the installation base 100; The fourth step: First install the slideway and the slider, then install the roller frame 400 and adjust its position; The fifth step: First install the third bearing 820 and the fourth bearing 840, then install the roller 810, and finally install the third bearing cover 830 and the fourth bearing cover 850 to fix the roller 810; The sixth step: First install the first driving device 900, then fix the first gear 510 on the rotating shaft and engage it with the second gear 520; The seventh step: First install the rack 620, then fix the third gear 610 on the driving shaft, and finally install the second driving device 1000 and make the third gear 610 engage with the rack 620.

[0051] The working principle of the steel sleeve rolling self-tightening device for a high-pressure plunger pump provided in this embodiment is as follows: First, start the second driving device 1000, the second driving mechanism 600 starts to work, driving the roller frame 400 to move horizontally until the outer wall of the roller 810 contacts the inner wall of the high-pressure steel sleeve 710. At this time, continue to control the roller frame 400 to move forward, continuously squeezing the inner wall of the high-pressure steel sleeve 710 to cause a certain plastic deformation of the inner wall of the high-pressure steel sleeve 710, and then the second driving device 1000 stops working; Then, start the first driving device 900, the first driving mechanism 500 starts to work, driving the high-pressure steel sleeve 710 to rotate. At this time, the roller 810 also rotates by itself. After the high-pressure steel sleeve 710 rotates one week, the rolling self-tightening operation is completed.

[0052] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and the practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0053] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A steel sleeve rolling self-tightening device for a high-pressure plunger pump, characterized in that Including: An installation base (100), a first fixing seat (200), a second fixing seat (300), a roller frame (400), a first driving device (900), a first driving mechanism (500), a second driving device (1000), a second driving mechanism (600), a steel sleeve assembly (700), and a roller assembly (800); The first fixing seat (200) is installed on the installation base (100); The first fixing seat (200) has an L-shaped structure. One side wall of the first fixing seat (200) is parallel to the installation base (100) and is connected to the installation base (100), and the other side wall of the first fixing seat (200) is perpendicular to the installation base (100). A first slideway (210) is provided on the side wall of the first fixing seat (200) parallel to the installation base (100), and the first slideway (210) is laid along the length direction of the first fixing seat (200). A first communication hole and a second communication hole are formed on the side wall of the first fixing seat (200) perpendicular to the installation base (100); The second fixing seat (300) is installed on the installation base (100), and the second fixing seat (300) is arranged parallel to the first fixing seat (200); The second fixing seat (300) has an L-shaped structure. One side wall of the second fixing seat (300) is parallel to the installation base (100) and is connected to the installation base (100), and the other side wall of the second fixing seat (300) is perpendicular to the installation base (100). A second slideway (310) is provided on the side wall of the second fixing seat (300) parallel to the installation base (100), and the second slideway (310) is laid along the length direction of the second fixing seat (300). A third communication hole is formed on the side wall of the second fixing seat (300) perpendicular to the installation base (100), and the third communication hole is coaxially arranged with the second communication hole; The roller frame (400) is sleeved outside the first fixing seat (200) and the second fixing seat (300), and the roller frame (400) is slidably connected to the first fixing seat (200) and the second fixing seat (300); The first driving device (900) is located on the side of the first fixing seat (200) away from the second fixing seat (300) and is installed on the installation base (100); The first driving mechanism (500) is installed on the surface of the first fixing seat (200) close to the second fixing seat (300) and is connected to the first driving device (900); The second driving device (1000) is located on the side of the second fixing seat (300) away from the first fixing seat (200) and is installed on the installation base (100); The second driving mechanism (600) is installed on the roller frame (400) and is connected to the second driving device (1000); The steel sleeve assembly (700) is located between the first fixed seat (200) and the second fixed seat (300). After one end of the steel sleeve assembly (700) is connected to the first driving mechanism (500), it is rotatably connected to the first fixed seat (200), and the other end of the steel sleeve assembly (700) is rotatably connected to the second fixed seat (300). One end of the roller assembly (800) is rotatably connected to one side wall of the roller frame (400). After the other end of the roller assembly (800) passes through the interior of the steel sleeve assembly (700), it is rotatably connected to the other side wall of the roller frame (400).

2. The steel sleeve rolling self-tightening device for a high-pressure plunger pump according to claim 1, characterized in that, The roller frame (400) has a U-shaped structure. A first slider (410) and a fourth communication hole are provided on one side wall of the roller frame (400). The first slider (410) is located below one side wall of the roller frame (400) and is laid along the length direction of one side wall of the roller frame (400). The first slider (410) is slidably connected to the first slideway (210), and the fourth communication hole is coaxially arranged with the second communication hole. A second slider (420) and a fifth communication hole are provided on the other side wall of the roller frame (400). The second slider (420) is located below the other side wall of the roller frame (400) and is laid along the length direction of the other side wall of the roller frame (400). The second slider (420) is slidably connected to the second slideway (310), and the fifth communication hole is coaxially arranged with the third communication hole.

3. The steel sleeve rolling autofrettage device for a high-pressure plunger pump according to claim 1, characterized in that, The steel sleeve assembly (700) includes a high-pressure steel sleeve (710), a first flange (720), a limit bushing (730), a first bearing (740), a second flange (750), and a second bearing (760). The first bearing (740) is arranged in the second communication hole, and the second bearing (760) is arranged in the third communication hole. The two ends of the high-pressure steel sleeve (710) are respectively connected to the first flange (720) and the second flange (750). The first flange (720) is rotatably connected to the first fixed seat (200) through the first bearing (740). The second flange (750) is rotatably connected to the second fixed seat (300) through the second bearing (760). The limit bushing (730) is located between the high-pressure steel sleeve (710) and the first fixed seat (200) and is sleeved on the outside of the neck of the first flange (720).

4. The steel sleeve rolling self-tightening device for a high-pressure plunger pump according to claim 3, characterized in that, The first driving mechanism (500) includes a first gear (510) and a second gear (520). The first gear (510) is connected to the output end of the first driving device (900) through the first communication hole. The second gear (520) is located between the limit bushing (730) and the high-pressure steel sleeve (710) and is sleeved on the outside of the neck of the first flange (720). The second gear (520) meshes with the first gear (510).

5. The steel sleeve rolling autofrettage device for a high-pressure plunger pump according to claim 2, characterized in that, The second driving mechanism (600) includes a third gear (610) and a rack (620); the rack (620) is installed on the side wall of the roller frame (400) perpendicular to the mounting base (100), the third gear (610) is connected to the output end of the second driving device (1000), and meshes with the rack (620).

6. The steel sleeve rolling self-tightening device for a high-pressure plunger pump according to claim 2, characterized in that, The roller assembly (800) includes a roller (810), a third bearing (820), a third bearing cover (830), a fourth bearing (840) and a fourth bearing cover (850); the third bearing (820) is arranged in the fourth communication hole, the third bearing cover (830) is connected to the roller frame (400) and abuts against the third bearing (820); the fourth bearing (840) is arranged in the fifth communication hole, the fourth bearing cover (850) is connected to the roller frame (400) and abuts against the fourth bearing (840); one end of the roller (810) is rotatably connected to the roller frame (400) through the fourth bearing (840), and the other end of the roller (810) passes through the inside of the steel sleeve assembly (700) and is rotatably connected to the roller frame (400) through the third bearing (820).

Images