A wear-resistant flat plunger cylinder for recombinant material hydraulic equipment

Abstract

The present invention discloses a wear-resistant flat-lying plunger cylinder for recombinant material hydraulic equipment, comprising a cylinder body horizontally positioned on a positioning hole of a load-bearing frame of the hydraulic equipment, an oil inlet connected to an oil pump being opened at one end of the cylinder body, and a plunger which is equipped with an internal seal of the cylinder body and can perform a rotary reciprocating motion when the oil is in and out, so that the circumferential side wall is evenly worn. One end of the plunger extends out of the cylinder body and is rotatably arranged on a movable top beam via a bearing. The plunger equipped with an internal seal of the cylinder body of the present invention can perform a rotary reciprocating motion when the oil is in and out, thereby ensuring uniform contact between the circumferential side wall of the plunger and the guide sleeve, so that the circumferential side wall of the plunger is evenly worn, avoiding the phenomenon of only wearing one area, greatly extending the service life of the plunger, and effectively reducing the cost of repairing and replacing the plunger.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and more particularly to a wear-resistant flat-lying plunger cylinder for recombinant material hydraulic equipment. Background Art

[0002] The plunger cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It features a simple structure and reliable operation. Using it to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] Recombinant wood pressing technology and equipment involves forming bamboo and wood into sheets or rolling them into bamboo strands or bundles. These materials undergo drying, gluing, post-gluing drying, high-pressure pressing, high-temperature curing, cooling, and demolding processes, and are then further processed into recombinant bamboo and wood profiles. These profiles offer superior performance and a wide range of applications. The production and processing of recombinant wood utilizes a wide range of hydraulic equipment, including horizontal cylinders. Due to gravity, the weight of the plunger constantly presses against the guide sleeve during reciprocating motion. The bottom of the plunger experiences relatively high friction from the guide sleeve and wear-resistant belt. Over time, the bottom of the plunger wears more severely than any other part of its circumference. This increases the gap between the bottom of the plunger and the sleeve, leading to hydraulic oil leakage, which significantly reduces the plunger's service life and increases the cost of repairing and replacing it. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a wear-resistant flat-lying plunger cylinder for recombinant material hydraulic equipment to solve the problem of wear of the plunger bottom in the plunger cylinder and the short service life of the plunger, so that the circumferential side wall of the plunger is evenly worn, avoiding the phenomenon that the plunger only wears one area, thereby greatly extending its service life.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A wear-resistant flat-lying plunger cylinder for reconstituted material hydraulic equipment includes a cylinder body horizontally positioned on a positioning hole of a load-bearing frame of the hydraulic equipment, an oil inlet connected to an oil pump is opened at one end of the cylinder body, and an internal seal of the cylinder body is equipped with a plunger that can perform a rotating reciprocating motion when the oil enters and exits so that the circumferential side wall is evenly worn. One end of the plunger extends out of the cylinder body and is rotatably arranged on a movable top beam through a bearing.

[0007] To further optimize the technical solution, a guide sleeve is provided on the outer sleeve of the plunger located in the cylinder body, and a plurality of parallel spiral grooves are opened on the inner side wall of the front section of the guide sleeve for storing hydraulic oil and driving the plunger to rotate when the plunger moves back and forth.

[0008] To further optimize the technical solution, a wear-resistant belt groove is provided on the inner side wall of the rear section of the guide sleeve, and a wear-resistant belt that is slidably assembled with the plunger is embedded in the wear-resistant belt groove.

[0009] To further optimize the technical solution, a sealing ring groove is provided on the inner side wall of the rear section of the guide sleeve, and a sealing ring that is slidably assembled with the plunger is embedded in the sealing ring groove.

[0010] To further optimize the technical solution, a compression sleeve is further provided on the outside of the plunger, and the compression sleeve includes a flange portion fixedly connected to the cylinder body and a compression sleeve portion integrally provided with the flange portion and abutting against the guide sleeve.

[0011] To further optimize the technical solution, one end of the plunger extending out of the oil cylinder body is rotatably arranged on a connecting end cover fixed to the movable top beam through a bearing.

[0012] To further optimize the technical solution, the plunger is rotatably arranged on the connecting end cover through a radial bearing and a thrust bearing.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0014] The plunger of the internal sealing assembly of the oil cylinder body of the present invention can perform a rotary reciprocating motion when the oil enters and exits, thereby making the circumferential side wall of the plunger evenly contact with the guide sleeve, so that the circumferential side wall of the plunger is evenly worn, avoiding the phenomenon of only wearing one area, greatly extending the service life of the plunger, and effectively reducing the cost of repairing and replacing the plunger.

[0015] The guide sleeve of the present invention is provided with a plurality of parallel spiral grooves on the inner side wall of the front section. When the oil pump supplies oil to the cylinder body and pressurizes the piston to move left and right, the spiral grooves of the guide sleeve are filled with hydraulic oil with increasingly higher pressure. The edge of each spiral belt will generate friction on the piston in the direction of the normal line of the relative edge. The friction will be decomposed into longitudinal friction and transverse friction. At the same time, one end of the piston is rotatably set on the movable top beam. Therefore, the decomposed longitudinal friction will cause the piston to rotate, thereby ensuring the uniformity of the contact between the piston and the guide sleeve.

[0016] The plunger of the present invention is rotatably arranged on the connecting end cover through a centripetal bearing and a thrust bearing, which effectively ensures that there is no resistance when the plunger rotates, making the plunger rotate more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention installed on a recombinant material hydraulic device;

[0019] Figure 3This is a schematic diagram of the structure of the present invention when connected to a movable top beam;

[0020] Figure 4 It is a partial structural diagram of the present invention.

[0021] Among them: 1. Cylinder body, 2. Plunger, 3. Oil inlet, 4. Guide sleeve, 41. Spiral groove, 5. Press sleeve, 51. Screw, 6. Sealing ring, 7. Wear-resistant belt, 8. Connecting end cover, 9. Centripetal bearing, 10. Thrust bearing, 11. Oil pump, 12. Hydraulic equipment load-bearing frame, 13. Movable top beam, 14. Fixed top beam, 15. Compressed product. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Recombined hydraulic equipment, combined Figure 2 As shown, it includes a hydraulic equipment load-bearing frame 12, a horizontal plunger cylinder, a movable top beam 13, a fixed top beam 14 and an oil pump 11. The horizontal plunger cylinder is arranged inside the hydraulic equipment load-bearing frame 12, the movable top beam 13 is arranged at the end of the horizontal plunger cylinder, and the fixed top beam 14 is fixedly arranged inside the hydraulic equipment load-bearing frame 12. A pressing space for pressing the compressed product 15 is formed inside the hydraulic equipment load-bearing frame 12 between the movable top beam 13 and the fixed top beam 14. The movable top beam 13 presses the compressed product 15 under the drive of the horizontal plunger cylinder.

[0024] A wear-resistant flat plunger cylinder for recombinant material hydraulic equipment, combined with Figures 1 to 4 As shown, it includes a cylinder body 1, an oil inlet 3 and a plunger 2.

[0025] A positioning hole is provided on the hydraulic equipment bearing frame 12 , and the oil cylinder body 1 is horizontally positioned on the hydraulic equipment bearing frame 12 . Specifically, the oil cylinder body 1 is positioned on the positioning hole of the hydraulic equipment bearing frame 12 .

[0026] An oil inlet 3 connected to an oil pump 11 is formed at one end of the oil cylinder body 1 . The oil inlet 3 and the oil pump 11 are connected via a pipeline. The oil pump 11 can supply oil to the oil cylinder body 1 through the oil inlet 3 .

[0027] The internal sealing assembly of the oil cylinder body 1 is equipped with a plunger 2, which can perform a rotary reciprocating motion when the oil enters and exits, so that the circumferential side wall is evenly worn, avoiding the phenomenon of only wearing one area, and greatly extending its service life.

[0028] The outer sleeve of the plunger 2 located in the cylinder body 1 is provided with a guide sleeve 4. The inner side wall of the front section of the guide sleeve 4 is provided with a plurality of parallel spiral grooves 41. The spiral grooves 41 are used to store hydraulic oil and drive the plunger 2 to rotate when the plunger 2 moves back and forth.

[0029] A wear-resistant belt groove is provided on the inner side wall of the rear section of the guide sleeve 4 , and a wear-resistant belt 7 slidably fitted with the plunger 2 is embedded in the wear-resistant belt groove.

[0030] A sealing ring groove is provided on the inner side wall of the rear section of the guide sleeve 4 , and a sealing ring 6 slidably fitted with the plunger 2 is embedded in the sealing ring groove.

[0031] The outside of the plunger 2 is also provided with a pressing sleeve 5, which includes a flange portion fixedly connected to the cylinder body 1 and a pressing sleeve portion integrally arranged with the flange portion and abutting against the guide sleeve 4. The flange portion of the pressing sleeve 5 is in contact with the side wall of the cylinder body 1 and is connected to the cylinder body 1 by screws 51.

[0032] One end of the plunger 2 extends out of the oil cylinder body 1 and is rotatably arranged on the movable top beam 13. One end of the plunger 2 extending out of the oil cylinder body 1 is rotatably arranged on the connecting end cover 8, and the connecting end cover 8 is fixed to the movable top beam 13.

[0033] The plunger 2 is rotatably mounted on the connecting end cover 8 via a radial bearing 9 and a thrust bearing 10 to ensure that there is no resistance when the plunger rotates.

[0034] In the present invention, the helix angle of the spiral groove 41 is set to β. When the oil pump supplies oil to the cylinder body and pressurizes it to push the plunger 2 from right to left, the spiral groove 41 of the guide sleeve 4 is filled with hydraulic oil with increasingly higher pressure. In the spiral groove area of the guide sleeve 4, the circumference of the plunger 2 is tightly wrapped by the spiral hydraulic sleeve. Assuming that the friction coefficient between the hydraulic oil and the plunger is f1, when the plunger moves from right to left, each spiral edge of the spiral hydraulic sleeve will generate a friction force F1 relative to the edge normal direction on the plunger, and F1 will be decomposed into a longitudinal friction force F1x and a transverse friction force F1y. Similarly, when the hydraulic equipment needs to return, the plunger is pushed from left to right by the return mechanism, and the pressure in the cylinder is unloaded to zero. At this time, the plunger is supported by the spiral surface of the guide sleeve and the wear-resistant belt. Assuming that the friction coefficient between the spiral groove edge of the guide sleeve and the plunger is f2, when the plunger moves from left to right, the spiral groove edge of the guide sleeve will generate a friction force F2 on the plunger in the direction of the normal line relative to the edge, and F2 will be decomposed into longitudinal friction force F2x and transverse friction force F2y.

[0035] Because F1y and F2y are in opposite directions, the plunger rotates in opposite directions while moving longitudinally. Since f1 ≠ f2 (generally, f1 < f2), F1y ≠ F2y. This results in the plunger's rotation angle α1 during leftward motion not being equal to the reverse rotation angle α2 during rightward motion. The difference between α1 and α2 is the plunger's angular rotation for each reciprocating motion. This ensures that the plunger rotates during its left-right reciprocating motion, resulting in uniform wear around its circumference, preventing wear in a single area and significantly extending its service life.

Claims

1. A wear-resistant flat plunger cylinder for reconstituted material hydraulic equipment, characterized by: The invention comprises an oil cylinder body (1) horizontally positioned on a positioning hole of a load-bearing frame of a hydraulic device, an oil inlet (3) connected to an oil pump (11) being provided at one end of the oil cylinder body (1), an internal seal assembly of the oil cylinder body (1) being provided with a plunger (2) capable of rotating and reciprocating when the oil enters and exits the oil so as to uniformly wear the circumferential side wall, one end of the plunger (2) extending out of the oil cylinder body (1) and being rotatably arranged on a movable top beam (13) via a bearing; The outer sleeve of the plunger (2) in the oil cylinder body (1) is provided with a guide sleeve (4). A plurality of parallel spiral grooves (41) are provided on the inner side wall of the front section for storing hydraulic oil and driving the plunger (2) to rotate when the plunger (2) moves back and forth.

2. The wear-resistant flat-type plunger cylinder for recombinant material hydraulic equipment according to claim 1, characterized in that: A wear-resistant belt groove is provided on the inner side wall of the rear section of the guide sleeve (4), and a wear-resistant belt (7) is embedded in the wear-resistant belt groove and is slidably fitted with the plunger (2).

3. A wear-resistant flat-type plunger cylinder for recombinant material hydraulic equipment according to claim 1 or 2, characterized in that: A sealing ring groove is provided on the inner side wall of the rear section of the guide sleeve (4), and a sealing ring (6) is embedded in the sealing ring groove and is slidably fitted with the plunger (2).

4. The wear-resistant flat-type plunger cylinder for recombinant material hydraulic equipment according to claim 2, characterized in that: The plunger (2) is also provided with a pressing sleeve (5) on its exterior. The pressing sleeve (5) comprises a flange portion fixedly connected to the oil cylinder body (1) and a pressing sleeve portion integrally provided with the flange portion and abutting against the guide sleeve (4).

5. The wear-resistant flat-type plunger cylinder for recombinant material hydraulic equipment according to claim 1, characterized in that: One end of the plunger (2) extending out of the oil cylinder body (1) is rotatably arranged on a connecting end cover (8) fixed to the movable top beam (13) through a bearing.

6. The wear-resistant flat-type plunger cylinder for recombinant material hydraulic equipment according to claim 1, characterized in that: The plunger (2) is rotatably mounted on the connecting end cover (8) via a radial bearing (9) and a thrust bearing (10).

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