CN115217887B

CN115217887B - Hydraulic damper

Info

Publication number: CN115217887B
Application number: CN202210551842.0A
Authority: CN
Inventors: 李绍贵; 刘禹萱
Original assignee: Changsha Yite Fluid Technology Co ltd
Current assignee: Changsha Yite Fluid Technology Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2024-06-04
Anticipated expiration: 2042-05-18
Also published as: CN115217887A

Abstract

The invention relates to the technical field of hydraulic control, in particular to a hydraulic damper which comprises a piston body, wherein a piston rod is fixedly arranged in the center of the top wall of the piston body, four rotating blocks are uniformly connected to the top wall of the piston body in a threaded manner, four notches matched with the rotating blocks in a threaded manner are uniformly formed in the top wall of the piston body, curved paths and straight paths are arranged in the four rotating blocks, through holes I matched with the curved paths are formed in the bottom walls of the inner sides of the four notches, through holes II matched with the straight paths are formed in the bottom walls of the inner sides of the four notches, and the bottoms of the through holes I and the through holes II are communicated with the lower side of the piston body. According to the invention, the mutual staggered grooves are arranged on the inner side wall of the curved path to increase the passing resistance of hydraulic oil, and meanwhile, the curved path is internally provided with two pressure boosting valves, so that the integral damping characteristic is further improved, and the curved path and the straight path are internally provided with two one-way valves, so that the piston body motion is guided.

Description

Hydraulic damper

Technical Field

The invention relates to the technical field of hydraulic control, in particular to a hydraulic damper.

Background

The hydraulic damper is a device for slowing down mechanical vibration and consuming kinetic energy by utilizing damping characteristics, is sensitive to speed response, can be suitable for vibration resistance of pipelines and equipment of nuclear power plants, thermal power plants, chemical plants, steel plants and the like, and is commonly used for controlling impact fluid vibration (such as impact shock of main valve quick closing, relief valve discharging, water hammer, pipe breaking and the like) and seismic shock pipe system vibration;

For the hydraulic damper existing in the prior art, there are Magnetorheological (MR) dampers filled with magnetorheological fluid controlled by a magnetic field, in which the viscosity of the damping fluid is changed by changing the power of an electromagnet, so that the damping characteristic can be continuously controlled, but the magnetorheological material is expensive and is generally applicable to high-performance equipment and cannot be widely popularized in low-end equipment, and there are also the hydraulic dampers in which the damping characteristic is changed by changing the size of the diameter of a piston through hole of the damper, namely, the smaller the diameter of the piston through hole is, the larger the damping of the damper is;

based on the discovery and analysis of changing the damping characteristic of the damper in the prior art, the method of reducing the diameter of the through hole of the piston to improve the damping of the damper is discovered, and the damping device has the advantages of simple structure, easy maintenance, low cost in terms of production and manufacture, wide application in any equipment, but the problem of blocking of the narrow through hole after long-term use, and easy increase of the probability of failure of the damper;

For this purpose, a hydraulic damper is proposed and designed.

Disclosure of Invention

The invention aims to provide a hydraulic damper, which changes a through hole path in a piston by keeping the diameter of a through hole of the piston unchanged, namely, changing a straight-through path into a curved path, so that hydraulic oil is correspondingly rubbed by the side wall of the curved path when passing through the curved path, and simultaneously delays the time of the hydraulic oil passing through the curved path, thereby achieving the purpose of increasing the damping of the damper and solving the problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A hydraulic damper, comprising:

the piston body is fixedly provided with a piston rod in the center of the top wall of the piston body;

the top wall of the piston body is uniformly provided with four notches in threaded fit with the rotating blocks;

The inner sides of the four notches are respectively provided with a through hole I matched with the curved paths, and the bottom ends of the through holes I are communicated with the lower side of the piston body;

The inside of four rotatory piece all is equipped with the straight path, four all offer on the diapire of notch inboard with straight path mutually supporting through-hole two, and the bottom of through-hole two all communicates with the downside of piston body.

Sealing rubber rings are arranged on the bottom walls of the four notches.

Two clamping grooves are formed in the top walls of the four rotating blocks, two spring buckles are formed in the top walls of the four notches, and the two spring buckles are matched with the two clamping grooves.

Grooves which are staggered with each other are uniformly formed in the inner side wall of the curved path.

Permanent magnet filter screens are arranged on two sides of the second curved path opening and two sides of the first straight path opening.

The curved path is internally provided with two one-way valves I, and the two one-way valves I are respectively positioned on the upper side of the curved path and the lower side of the through hole I.

Two booster valves are arranged in the curved path, the two booster valves are located between the first two check valves, the conducting directions of the two booster valves are consistent with the conducting directions of the first two check valves, and the conducting directions of the first two check valves are conducted from the through hole to the upper side of the curved path.

The straight path is internally provided with two one-way valves II, the two one-way valves II are respectively positioned on the upper side of the straight path and the lower side of the through hole II, the conduction directions of the two one-way valves II are consistent, and the conduction directions of the two one-way valves II are conducted in the direction of the through hole II from the lower side of the straight path.

The top walls of the four rotating blocks are fixedly provided with rotating buttons, and button grooves matched with the rotating buttons are formed in the top walls of the four rotating blocks.

The four rotating blocks are composed of a first combination block and a second combination block, and the first combination block and the second combination block are positioned through positioning clamping blocks.

Compared with the prior art, the invention has the beneficial effects that:

1. According to the hydraulic damper, the mutual staggered grooves are formed in the inner side wall of the curved path, so that the resistance of hydraulic oil when the hydraulic oil passes through the curved path is increased, meanwhile, the two pressure boosting valves are arranged in the curved path, the integral damping characteristic is further improved, and the two one-way valves are arranged in the curved path and the straight path, so that the piston body has a guiding function when moving up and down, and the flexibility of the damper is improved.

2. According to the hydraulic damper, the permanent magnet filter screens are arranged at the two ends of the lower side of the curved path and the two ends of the upper side of the straight path, so that scrap iron existing in hydraulic oil can be magnetically absorbed through the permanent magnet filter screens, harmful friction generated by the scrap iron in the piston body is reduced, and the service life of the damper is prolonged.

3. The hydraulic damper is provided with the four rotating blocks which are connected to the piston body through the threads, the four rotating blocks are formed by splicing the first combining block and the second combining block, the detachable structure can facilitate cleaning or whole replacement of the inside of the rotating blocks, and the service life of the piston body is prolonged.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a perspective view of a piston body according to the present invention;

FIG. 3 is a diagram showing the internal structure of the piston body according to the present invention;

FIG. 4 is a cross-sectional view of a rotating block of the present invention;

FIG. 5 is a top view of the piston body of the present invention;

FIG. 6 is a bottom view of the piston body of the present invention;

FIG. 7 is a perspective view of a rotating block of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 4 at A in accordance with the present invention;

Fig. 9 is a cross-sectional view of a piston body of the present invention.

In the figure: 1. a piston body; 2. a piston rod; 11. a notch; 12. sealing the rubber ring; 13. a groove; 15. a curved path; 16. a straight path; 17. a clamping groove; 18. a spring buckle; 21. a rotating block; 22. rotating the button; 23. a button groove; 31. combining the first block; 32. a second combination block; 33. positioning a clamping block; 40. a permanent magnet filter screen; 51. a first through hole; 52. a second through hole; 61. a first check valve; 62. a second check valve; 63. a pressure increasing valve.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 9, the present invention provides a hydraulic damper, which has the following technical scheme:

A hydraulic damper, comprising:

the piston comprises a piston body 1, wherein a piston rod 2 is fixedly arranged in the center of the top wall of the piston body 1;

The top wall of the piston body 1 is uniformly provided with four notches 11 which are in threaded fit with the rotating blocks 21;

the inside of each of the four rotating blocks 21 is provided with a curved path 15, the bottom walls of the inner sides of the four notches 11 are provided with through holes I51 which are mutually matched with the curved paths 15, and the bottom ends of the through holes I51 are communicated with the lower side of the piston body 1;

the straight paths 16 are arranged in the four rotating blocks 21, through holes II 52 matched with the straight paths 16 are formed in the bottom walls of the inner sides of the four notches 11, and the bottom ends of the through holes II 52 are communicated with the lower side of the piston body 1.

Through being equipped with the recess 13 of mutual crisscross on the inside wall of curved path 15, increase the resistance when hydraulic oil passes through curved path 15, still be equipped with two booster valves 63 in curved path 15 simultaneously, further improved holistic damping characteristics, all be equipped with two check valves 61 and check valve two 62 in curved path 15 and the straight path 16 for piston body 1 has the guide effect when carrying out the up-and-down motion, has improved the flexibility of attenuator.

As an embodiment of the present invention, referring to fig. 9, sealing rubber rings 12 are provided on the bottom walls of the four notches 11.

Because four rotatory piece 21 all splice through combination piece one 31 and combination piece two 32 and form, in order to prevent that hydraulic oil from spilling over on the diapire of notch 11, all be equipped with sealing rubber circle 12 on the diapire of four notches 11 and improve the leakproofness.

As an embodiment of the present invention, referring to fig. 2 and 5, two clamping grooves 17 are formed on top walls of the four rotating blocks 21, two spring buckles 18 are formed on top walls of the four notches 11, and the two spring buckles 18 are matched with the two clamping grooves 17.

Because four rotatory piece 21 all pass through screw thread fixed mounting in piston body 1 inside, but four rotatory piece 21 below does not pierce through piston body 1 still include inside piston body 1, so through being equipped with spring buckle 18 on the roof of four notch 11, carry out further clamping and hasp to rotatory piece 21 in the top for whole more firm and reliable.

As an embodiment of the present invention, referring to fig. 8, grooves 13 are uniformly formed on the inner side wall of the curved path 15 to be staggered with each other.

By providing the curved path 15 with mutually staggered grooves 13 on its inner side walls, varying the smoothness of the grooves relative to a smooth inner side wall increases the resistance of the hydraulic oil as it passes through the curved path 15.

As an embodiment of the present invention, referring to fig. 4, permanent magnet screens 40 are provided at both lower ends of the curved path 15 and upper ends of the straight path 16.

There is a filter screen made of permanent magnetic material for magnetically attracting the iron filings existing in the hydraulic oil, and the permanent magnetic filter screen 40 is disposed at both lower ends of the curved path 15 and upper ends of the straight path 16 instead of at the inlet, so that the iron filings in the hydraulic oil can be prevented from directly blocking the curved path 15 and the inlet of the straight path 16, resulting in the non-passage of the oil path, and thus the problem of blocking can be avoided by the arrangement of the two sides.

As an embodiment of the present invention, referring to fig. 4 and 6, two check valves 61 are provided in the curved path 15, and the two check valves 61 are located at the upper side of the curved path 15 and the lower side of the through hole 51, respectively.

The inside of the curved path 15 is provided with two one-way valves 61, the conduction direction of the two one-way valves 61 is conducted from the lower side of the curved path 15 to the upper side of the curved path 15, so that hydraulic oil flows from the lower side of the curved path 15 to the upper side of the curved path 15 when the piston body 1 moves downwards, the hydraulic oil is ensured to pass through the curved path 15 instead of the straight path 16 when the piston body 1 moves downwards, and the damping characteristic of the damper is increased.

As an embodiment of the present invention, referring to fig. 4 and 6, two pressure-increasing valves 63 are provided in the curved path 15, the two pressure-increasing valves 63 are located between the two check valves 61, the conduction direction of the two pressure-increasing valves 63 is identical to the conduction direction of the two check valves 61, and the conduction direction of the two check valves 61 is conducted from the through hole 51 to the upper side of the curved path 15.

The two pressure increasing valves 63 are arranged in the curved path 15, so that the pressure of hydraulic oil passing through the curved path 15 can be further increased, the damping characteristic of the damper is further improved, and the conducting direction of the two pressure increasing valves 63 is consistent with the conducting direction of the two one-way valves 61.

As an embodiment of the present invention, referring to fig. 4 and 6, two check valves 62 are disposed in the straight path 16, the two check valves 62 are respectively located at the upper side of the straight path 16 and the lower side of the through hole 52, the conducting directions of the two check valves 62 are identical, and the conducting directions of the two check valves 62 are conducted from the lower side of the straight path 16 to the direction of the through hole 52.

The inside two check valves 62 that are provided with of straight route 16, the conduction direction of two check valves 62 is the same, the conduction direction of two check valves 62 is switched on by straight route 16 upside direction straight route 16 downside direction for piston body 1 when upward movement, let hydraulic oil flow straight route 16 upside flow straight route 16 downside, guaranteed that piston body 1 hydraulic oil passes straight route 16 rather than curved path 15 when upward movement, improve the rebound speed of attenuator, straight route 16 can set up a plurality ofly according to actual demand, in order to adapt to or adjust the rebound speed of attenuator under the different circumstances.

As an embodiment of the present invention, referring to fig. 2,5 and 7, rotary buttons 22 are fixedly installed on top walls of the four rotary blocks 21, and button grooves 23 which are matched with the rotary buttons 22 are formed on top walls of the four rotary blocks 21.

The rotary buttons 22 are arranged on the top walls of the four rotary blocks 21, so that operation support points are provided, and the rotary blocks 21 can be conveniently disassembled and assembled.

As an embodiment of the present invention, referring to fig. 7, each of the four rotating blocks 21 is composed of a first combination block 31 and a second combination block 32, and the first combination block 31 and the second combination block 32 are positioned by a positioning block 33.

The four rotating blocks 21 are formed by splicing the first combining block 31 and the second combining block 32, and are positioned by the positioning clamping blocks 33 so as to be convenient to install, and the detachable structure can conveniently clean the inside of the rotating blocks or replace the rotating blocks entirely, so that the service life of the piston body is prolonged.

Working principle: firstly, the motion direction of the piston body 1 can be wholly divided into upward motion and downward motion, because the inside of the curved path 15 and the straight path 16 is provided with the first one-way valve 61 and the second one-way valve 62, when the damper is stressed and compressed, the piston body 1 moves downwards, hydraulic oil flows in from the lower side of the curved path 15, hydraulic oil passes through the curved path 15 and flows out from the upper side of the curved path 15, the two booster valves 63 in the curved path 15 further pressurize hydraulic oil while the hydraulic oil passes through the curved path 15, the integral damping characteristic is improved, when the damper is rebounded by the upward acting force of an external spring, hydraulic oil flows in from the upper side of the straight path 16, hydraulic oil passes through the straight path 16 and flows out from the lower side of the straight path 16, the inner side wall of the straight path 16 is smoother than the inner side of the curved path 15, so that the friction force of the hydraulic oil passing through the straight path 16 is relatively smaller, the throughput and the passing speed of the hydraulic oil are relatively increased, the rebound speed of the damper is improved, the hydraulic oil further pressurizes the hydraulic oil when the hydraulic oil passes through the lower side of the curved path 15 and the upper side of the curved path 16, the permanent magnet filter screen 40 is arranged, the permanent magnet filter 40 is harmful to the hydraulic oil, the rotating blocks 21 are removed from the inner side of the rotary block 21, the rotary block 21 is formed by the rotary block 21, the rotary block 21 is convenient to replace the rotary block 21, and the rotary block 21 is convenient to replace the rotary block 21.

The electric elements are all connected with an external main controller and 220V mains supply through a transformer, and the main controller can be conventional known equipment for controlling a computer and the like.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A hydraulic damper, comprising:

the piston comprises a piston body (1), wherein a piston rod (2) is fixedly arranged in the center of the top wall of the piston body (1);

the piston comprises a piston body (1), a rotating block (21), four rotating blocks (21) and four notches (11) which are in threaded fit with the rotating blocks (21) are uniformly formed in the top wall of the piston body (1);

the inner parts of the four rotating blocks (21) are respectively provided with a curved path (15), the bottom walls of the inner sides of the four notches (11) are respectively provided with a first through hole (51) which is matched with the curved paths (15), and the bottom ends of the first through holes (51) are respectively communicated with the lower side of the piston body (1);

the inside of the four rotating blocks (21) is provided with straight paths (16), the bottom walls of the inner sides of the four notches (11) are provided with through holes II (52) which are matched with the straight paths (16), and the bottom ends of the through holes II (52) are communicated with the lower side of the piston body (1);

Two one-way valves (61) are arranged in the curved path (15), and the two one-way valves (61) are respectively positioned on the upper side of the curved path (15) and the lower side of the through hole I (51);

Two booster valves (63) are arranged in the curved path (15), the two booster valves (63) are positioned between the two one-way valves (61), the conducting direction of the two booster valves (63) is consistent with the conducting direction of the two one-way valves (61), and the conducting direction of the two one-way valves (61) is conducted from the through hole I (51) to the upper side direction of the curved path (15);

Two check valves II (62) are arranged in the straight path (16), the two check valves II (62) are respectively positioned on the upper side of the straight path (16) and the lower side of the through hole II (52), the conduction directions of the two check valves II (62) are consistent, and the conduction directions of the two check valves II (62) are conducted from the lower side of the straight path (16) to the direction of the through hole II (52).

2. A hydraulic damper according to claim 1, wherein: sealing rubber rings (12) are arranged on the bottom walls of the four notches (11).

3. A hydraulic damper according to claim 2, wherein: two clamping grooves (17) are formed in the top wall of each of the four rotating blocks (21), two spring buckles (18) are formed in the top wall of each of the four notch (11), and the two spring buckles (18) are matched with the two clamping grooves (17).

4. A hydraulic damper according to claim 1, wherein: the inner side wall of the curved path (15) is uniformly provided with mutually staggered grooves (13).

5. A hydraulic damper according to claim 1, wherein: permanent magnet filter screens (40) are arranged at the two ends of the lower side of the curved path (15) and the two ends of the upper side of the straight path (16).

6. A hydraulic damper according to claim 1, wherein: the top walls of the four rotating blocks (21) are fixedly provided with rotating buttons (22), and button grooves (23) matched with the rotating buttons (22) are formed in the top walls of the four rotating blocks (21).

7. A hydraulic damper according to claim 6, wherein: the four rotating blocks (21) are composed of a first combination block (31) and a second combination block (32), and the first combination block (31) and the second combination block (32) are positioned through positioning clamping blocks (33).