CN221003605U

CN221003605U - Nonlinear damper for oil groove section of pressure variable cylinder

Info

Publication number: CN221003605U
Application number: CN202322897979.4U
Authority: CN
Inventors: 曾鹏程; 张卫华; 代亮成; 池茂儒; 郭兆团
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2023-10-26
Filing date: 2023-10-26
Publication date: 2024-05-24
Anticipated expiration: 2033-10-26

Abstract

The utility model relates to the technical field of vibration absorbers and discloses a nonlinear damper for the section of an oil groove of a pressure variable cylinder, which comprises a pressure cylinder and an oil storage barrel, wherein the pressure cylinder is fixedly arranged in the oil storage barrel, an oil storage cavity is formed between the inner wall of the oil storage barrel and the outer wall of the pressure cylinder, oil and air are stored in the oil storage cavity, a piston cavity is arranged in the pressure cylinder, a piston mechanism is arranged in the piston cavity, a variable-section oil groove is arranged on one inner side wall of the pressure cylinder, the opening depth of the variable-section oil groove is gradually increased along the axial direction of the pressure cylinder, and a one-way oil inlet valve and a one-way oil outlet valve are arranged at the bottom end of the pressure cylinder. By changing the sectional area of the variable-section oil groove on the pressure cylinder under different displacement amounts, the shock absorber can generate damping forces with different magnitudes under different displacement amounts.

Description

Nonlinear damper for oil groove section of pressure variable cylinder

Technical Field

The utility model relates to the technical field of vibration dampers, in particular to a nonlinear damper with a variable pressure cylinder oil groove cross section.

Background

The damping force generated by the existing shock absorber is constant along with the change of displacement under the constant speed, but in practical engineering and equipment application, the required damping force requirements of the shock absorber are often different under different displacement conditions. For example, anti-roll dampers in the railway vehicle industry generally maintain a low amplitude vibration condition at an installed length when the vehicle is traveling in a straight line, and a large damping force is required to ensure vehicle stability, whereas anti-roll dampers generally maintain a large amplitude vibration condition in a stretched or compressed condition when the vehicle is traveling through a curved line, and a small damping force is required to ensure smooth traveling of the vehicle through the curve, whereas conventional dampers cannot achieve different damping force magnitudes at different displacements, most of the damping force of the conventional damper schemes are substantially constant with displacement. The damping device mainly comprises a piston, a piston rod, a pressure cylinder, an oil storage barrel, a damping valve and the like, wherein the piston is used for making a round trip motion in the pressure cylinder to force viscous medium in the shock absorber to pass through the damping valve in the piston and at the bottom of the pressure cylinder, the viscous medium generates intense friction among molecules and between the viscous medium and the interior of the pressure cylinder, the damping valve has a huge throttling effect on the viscous medium, the internal factors enable the shock absorber to generate damping force, the damping effect of damping energy consumption is realized, and the damping force of the traditional shock absorber is basically unchanged along with the displacement because the damping effect of the damping valve and the displacement of the shock absorber have no correlation.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provide a nonlinear damper with the cross section of an oil groove of a pressure cylinder, and the sectional area of the oil groove with the variable cross section on the pressure cylinder under different displacement amounts is changed, so that the damper can generate damping forces with different magnitudes under different displacement amounts.

The aim of the utility model is realized by the following technical scheme: the utility model provides a pressure variable cylinder oil groove cross-section's nonlinear damper, includes pneumatic cylinder and oil storage bucket, the pneumatic cylinder is fixed to be set up in the oil storage bucket, the inner wall of oil storage bucket with be formed with the oil storage lacuna between the outer wall of pneumatic cylinder, store up oil and air in the oil storage lacuna, be equipped with the piston chamber in the pneumatic cylinder, be provided with piston mechanism in the piston chamber, an inside wall of pneumatic cylinder is equipped with the variable cross-section oil groove, the depth of seting up of variable cross-section oil groove is followed the axial of pneumatic cylinder increases gradually, the bottom of pneumatic cylinder is equipped with one-way inlet valve and one-way delivery valve.

In some embodiments, the piston mechanism comprises a piston rod and a piston, the piston is slidably arranged in the pressure cylinder, the piston divides the piston cavity into a left piston cavity and a right piston cavity, the piston rod is coaxially fixed at one end of the piston, one end of the piston rod, which is far away from the piston, penetrates out of the pressure cylinder, and the variable-section oil groove is gradually increased in the opening depth along the extending direction of the piston rod.

In some embodiments, the piston and piston rod are both precision polished.

In some embodiments, the one-way oil inlet valve comprises an oil inlet spring and an oil inlet valve plate, the pressure cylinder is provided with an oil inlet hole, two ends of the oil inlet hole are respectively communicated with the oil storage cavity and the piston cavity, the oil inlet valve plate is positioned in the piston cavity, the oil inlet valve plate and the oil inlet hole are coaxially arranged, the diameter of the oil inlet valve plate is larger than that of the oil inlet hole, an oil inlet mounting ring is fixed in the oil inlet hole, two ends of the oil inlet spring are respectively connected with the oil inlet mounting ring and the oil inlet valve plate, and when the oil inlet spring is in a normal state, the oil inlet valve plate contacts the pressure cylinder.

In some embodiments, the one-way oil outlet valve comprises an oil outlet spring and an oil outlet valve plate, the oil outlet is formed in the pressure cylinder, two ends of the oil outlet are respectively communicated with the oil storage cavity and the piston cavity, the oil outlet valve plate is positioned in the oil storage cavity, the oil outlet valve plate and the oil outlet are coaxially arranged, the diameter of the oil outlet valve plate is larger than that of the oil outlet, an oil outlet mounting ring is fixed in the oil outlet, two ends of the oil outlet spring are respectively connected with the oil outlet mounting ring and the oil outlet valve plate, and when the oil outlet spring is in a normal state, the oil outlet valve plate is in contact with the pressure cylinder.

In some embodiments, the oil storage barrel is slidably sleeved with a dust cover at the penetrating end of the piston rod, and one end of the piston rod, which is far away from the piston, is fixedly connected with the dust cover.

In some embodiments, the end of the dust cap and the end of the oil storage barrel are both fixed with rubber nodes.

The beneficial effects of the utility model are as follows:

1. Compared with the traditional shock absorber, the displacement-related shock absorber can provide damping force values with different magnitudes under the same stretching or compressing speed, when the size of the section diameter of the variable-section oil groove is linearly reduced along with the displacement, the damping force provided by the displacement-related shock absorber is in nonlinear rising under the corresponding displacement, so that the shock absorber can adjust the displacement section used by the shock absorber by adjusting the initial installation length, and further the damping force of the shock absorber is conveniently controlled.

2. Under the actual complex application state, the variable cross-section oil groove section diameter under different sections does not need to be linearly increased or decreased, and the change of the variable cross-section oil groove section diameter can be specially customized according to the actual application state so as to realize special matching with the actual application, so that the displacement related type shock absorber can effectively solve the problem that the conventional shock absorber can not meet the actual requirements under the complex application working condition at present, and can be effectively applied to the fields of machinery and construction.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a non-linear damper of the present utility model with a variable pressure cylinder oil sump cross section;

FIG. 2 is a cross-sectional view taken along the direction A-A of the pressure tube of FIG. 1;

FIG. 3 is a B-B cross-sectional view of the pressure tube of FIG. 1;

FIG. 4 is an enlarged view of FIG. 1 at A;

FIG. 5 is a graph of a comparative experiment of damping forces of a conventional shock absorber and a displacement-related shock absorber;

In the figure, a 1-pressure cylinder, a 2-oil storage barrel, a 3-oil storage cavity gap, a 4-variable-section oil groove, a 5-piston rod, a 6-piston, a 7-oil inlet spring, an 8-oil inlet valve plate, a 9-oil inlet hole, a 10-piston left cavity, a 11-piston right cavity, a 13-oil inlet mounting ring, a 14-oil outlet spring, a 15-oil outlet valve plate, a 16-oil outlet hole, a 17-oil outlet mounting ring, an 18-dust cover and a 19-rubber node.

Detailed Description

The technical solution of the present utility model will be described in further detail with reference to the accompanying drawings, but the scope of the present utility model is not limited to the following description.

As shown in fig. 1 to 4, a nonlinear damper for varying the section of an oil groove of a pressure cylinder comprises a pressure cylinder 1 and an oil storage barrel 2, wherein the pressure cylinder 1 is fixedly arranged in the oil storage barrel 2, an oil storage cavity 3 is formed between the inner wall of the oil storage barrel 2 and the outer wall of the pressure cylinder 1, oil and air are stored in the oil storage cavity 3, the oil storage and oil discharge functions of the shock absorber during working are ensured, a piston cavity is arranged in the pressure cylinder 1, a piston mechanism is arranged in the piston cavity, a variable section oil groove 4 is arranged on the inner side wall of the pressure cylinder 1, the opening depth of the variable section oil groove 4 is gradually increased along the axial direction of the pressure cylinder 1, a one-way oil inlet valve and a one-way oil outlet valve are arranged at the bottom end of the pressure cylinder 1, the piston mechanism comprises a piston rod 5 and a piston 6, the piston 6 is arranged in the pressure cylinder 1 in a sliding manner, the piston 6 divides a piston cavity into a left piston cavity 10 and a right piston cavity 11, the piston rod 5 is coaxially fixed at one end of the piston 6, one end of the piston rod 5, which is far away from the piston 6, penetrates out of the pressure cylinder 1, the opening depth of the variable-section oil groove 4 is gradually increased along the extending direction of the piston rod 5, when the piston 6 runs in the stretching direction (namely, leftwards), oil flows into the right piston cavity 11 from the left piston cavity 10 of the pressure cylinder 1 through the variable-section oil groove 4, and because the areas of the left side and the right side of the piston 6 are different, the oil flowing into the right piston cavity 11 from the left piston cavity 10 is insufficient, and therefore a certain amount of oil enters the right piston cavity 11 from the inside of the oil storage barrel 2 through the one-way oil inlet valve; when the piston 6 is operated in the compression direction (i.e., rightward), oil flows from the piston right chamber 11 of the pressure cylinder 1 into the piston left chamber 10 through the variable-section oil groove 4, and a certain amount of oil also flows from the piston right chamber 11 into the oil storage tank 2 through the one-way oil outlet valve. Because the oil liquid needs to pass through the narrow gap brought by the variable-section oil groove 4, the one-way oil inlet valve and the one-way oil outlet valve quickly, damping force can be generated when the shock absorber stretches or compresses, the cross-sectional area of the variable-section oil groove 4 is continuously changed along with the difference of the running stroke of the piston 6, the smooth degree of the oil liquid passing through the variable-section oil groove 4 is different, and further the damping force of the shock absorber at the same speed can be changed along with the change of displacement. Referring to fig. 5, compared with the conventional shock absorber, the displacement-related shock absorber can provide damping force values of different magnitudes under different displacements at the same stretching or compressing speed, and when the size of the section diameter of the variable-section oil groove is linearly reduced with the displacement, the damping force provided by the displacement-related shock absorber is non-linearly increased under the corresponding displacement, so that the shock absorber can adjust the displacement section used by the shock absorber by adjusting the initial installation length, and further conveniently control the damping force of the shock absorber. Meanwhile, the variable-section oil groove section diameter under different sections does not need to be linearly increased or decreased in the actual complex application state, and the change of the variable-section oil groove section diameter can be specially customized according to the actual application state so as to realize special matching with the actual application, so that the displacement-related type shock absorber can effectively solve the problem that the conventional shock absorber cannot meet the actual requirements under the complex application working condition at present, and can be effectively applied to the fields of machinery and construction.

Further, the piston 6 and the piston rod 5 are precisely polished to match the inner cavity of the shock absorber pressure cylinder 1 to ensure that the gap of the contact surface is as small as possible and no clamping stagnation occurs.

In some embodiments, as shown in fig. 1 and 4, the one-way oil inlet valve comprises an oil inlet spring 7 and an oil inlet valve plate 8, an oil inlet hole 9 is formed in the pressure cylinder 1, two ends of the oil inlet hole 9 are respectively communicated with the oil storage cavity 3 and the piston cavity, the oil inlet valve plate 8 is positioned in the piston cavity, the oil inlet valve plate 8 and the oil inlet hole 9 are coaxially arranged, the diameter of the oil inlet valve plate 8 is larger than that of the oil inlet hole 9, an oil inlet mounting ring 13 is fixed in the oil inlet hole 9, two ends of the oil inlet spring 7 are respectively connected with the oil inlet mounting ring 13 and the oil inlet valve plate 8, and when the oil inlet spring 7 is in a normal state, the oil inlet valve plate 8 contacts the pressure cylinder 1; the unidirectional oil outlet valve comprises an oil outlet spring 14 and an oil outlet valve plate 15, an oil outlet hole 16 is arranged on the pressure cylinder 1, two ends of the oil outlet hole 16 are respectively communicated with an oil storage cavity 3 and a piston cavity, the oil outlet valve plate 15 is positioned in the oil storage cavity 3, the oil outlet valve plate 15 and the oil outlet hole 16 are coaxially arranged, the diameter of the oil outlet valve plate 15 is larger than that of the oil outlet hole 16, an oil outlet mounting ring 17 is fixed in the oil outlet hole 16, two ends of the oil outlet spring 14 are respectively connected with the oil outlet mounting ring 17 and the oil outlet valve plate 15, when the oil outlet spring 14 is in a normal state, the oil outlet valve plate 15 contacts the pressure cylinder 1, when the piston 6 moves towards a stretching direction, oil flowing into a piston right cavity 11 from a piston left cavity 10 is insufficient, so that the oil in the oil storage barrel 2 acts on the oil inlet valve plate 8 to drive the oil inlet spring 7 to stretch, the oil inlet valve plate 8 is separated from the pressure cylinder 1, the oil in the oil storage barrel 2 enters the piston cavity through the oil inlet hole 9, the oil flows into the left piston cavity 10 from the right piston cavity 11 of the pressure cylinder 1 through the variable-section oil groove 4 when the piston 6 moves towards the compression direction (namely, to the right), and a certain amount of oil flows into the oil storage barrel 2 from the right piston cavity 11 through the one-way oil outlet valve, the oil outlet valve plate 15 moves away from the pressure cylinder 1, the oil outlet valve plate 15 stretches the oil outlet spring 14 to open the oil outlet hole 16, the oil in the piston cavity enters the oil storage cavity 3 through the oil outlet hole 16, the oil inlet valve plate 8 abuts against the pressure cylinder 1 under the action of the oil in the piston cavity to close the oil inlet hole 9, the one-way oil outlet valve and the one-way oil outlet valve are closed normally, thereby effectively separating the piston chamber from the oil reservoir gap 3.

In some embodiments, the oil storage barrel 2 is slidably sleeved with a dust cover 18 at the penetrating end of the piston rod 5, one end of the piston rod 5 away from the piston 6 is fixedly connected with the dust cover 18, and the dust cover 18 is used for preventing dust, sand and foreign matters from damaging or striking and invading the piston rod 5; the end of the dust cover 18 and the end of the oil storage barrel 2 are both fixed with rubber nodes 19, so that a buffering effect is achieved.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model; and those of ordinary skill in the art will appreciate that the benefits achieved by the present utility model are merely better than those achieved by the current embodiments of the prior art in certain circumstances and are not intended to be the most excellent uses directly in the industry.

The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a pressure variable cylinder oil groove cross-section nonlinear damper, its characterized in that, including pneumatic cylinder (1) and oil storage bucket (2), pneumatic cylinder (1) is fixed to be set up in oil storage bucket (2), the inner wall of oil storage bucket (2) with be formed with oil storage cavity (3) between the outer wall of pneumatic cylinder (1), oil storage cavity (3) internal storage has fluid and air, be equipped with the piston chamber in pneumatic cylinder (1), the piston intracavity is provided with piston mechanism, an inside wall of pneumatic cylinder (1) is equipped with variable cross-section oil groove (4), the offer degree of depth of variable cross-section oil groove (4) is followed the axial of pneumatic cylinder (1) is crescent, the bottom of pneumatic cylinder (1) is equipped with one-way inlet valve and one-way delivery valve.

2. A non-linear damper of a variable pressure cylinder oil groove cross section according to claim 1, characterized in that the piston mechanism comprises a piston rod (5) and a piston (6), the piston (6) is slidably arranged in the pressure cylinder (1), the piston (6) divides the piston cavity into a left piston cavity (10) and a right piston cavity (11), the piston rod (5) is coaxially fixed at one end of the piston (6), one end of the piston rod (5) far away from the piston (6) penetrates out of the pressure cylinder (1), and the opening depth of the variable cross section oil groove (4) is gradually increased along the extending direction of the piston rod (5).

3. A non-linear damper for a cross section of an oil groove of a pressure variable cylinder according to claim 2, wherein the piston (6) and the piston rod (5) are subjected to precision polishing.

4. The non-linear damper of the oil groove section of the pressure cylinder according to claim 1, wherein the one-way oil inlet valve comprises an oil inlet spring (7) and an oil inlet valve plate (8), the pressure cylinder (1) is provided with an oil inlet hole (9), two ends of the oil inlet hole (9) are respectively communicated with the oil storage cavity (3) and the piston cavity, the oil inlet valve plate (8) is positioned in the piston cavity, the oil inlet valve plate (8) and the oil inlet hole (9) are coaxially arranged, the diameter of the oil inlet valve plate (8) is larger than that of the oil inlet hole (9), an oil inlet mounting ring (13) is fixed in the oil inlet hole (9), two ends of the oil inlet spring (7) are respectively connected with the oil inlet mounting ring (13) and the oil inlet valve plate (8), and when the oil inlet spring (7) is in a normal state, the oil inlet valve plate (8) contacts the pressure cylinder (1).

5. The non-linear damper of the oil groove section of the pressure cylinder according to claim 4, wherein the one-way oil outlet valve comprises an oil outlet spring (14) and an oil outlet valve plate (15), the oil outlet hole (16) is formed in the pressure cylinder (1), two ends of the oil outlet hole (16) are respectively communicated with the oil storage cavity (3) and the piston cavity, the oil outlet valve plate (15) is located in the oil storage cavity (3), the oil outlet valve plate (15) and the oil outlet hole (16) are coaxially arranged, the diameter of the oil outlet valve plate (15) is larger than that of the oil outlet hole (16), an oil outlet mounting ring (17) is fixed in the oil outlet hole (16), two ends of the oil outlet spring (14) are respectively connected with the oil outlet mounting ring (17) and the oil outlet valve plate (15), and when the oil outlet spring (14) is in a normal state, the oil outlet valve plate (15) contacts the pressure cylinder (1).

6. A non-linear damper of a pressure cylinder oil groove cross section according to claim 2, characterized in that the oil storage barrel (2) is slidably sleeved with a dust cover (18) at the penetrating end of the piston rod (5), and one end of the piston rod (5) far away from the piston (6) is fixedly connected with the dust cover (18).

7. A non-linear damper of variable pressure cylinder oil sump cross section according to claim 6, characterized in that the end of the dust cap (18) and the end of the oil storage barrel (2) are both fixed with rubber nodes (19).