CN211715634U - Double-circulation anti-snaking oil pressure shock absorber for rail transit vehicle - Google Patents

Abstract

The utility model relates to an anti snakelike oil pressure shock absorber of dual cycle for rail transit vehicle mainly includes direction lid unit, piston unit and bottom valve unit, the utility model discloses a improve traditional piston valve system, cancel the normal through-hole on piston valve system core valve originally to cover at the direction and increase one set of check valve system, separately adjust tensile and compression damping power, influence each other falls to minimumly, is showing the degree of difficulty that has reduced shock absorber damping power and adjusts.

Description

Double-circulation anti-snaking oil pressure shock absorber for rail transit vehicle

Technical Field

The utility model belongs to the technical field of the track traffic shock absorber, concretely relates to anti snakeing oil hydraulic shock absorber of dual cycle for track traffic vehicle.

Background

The oil pressure shock absorber is a key part on the rail vehicle, particularly an anti-snaking shock absorber, has extremely high technical content, and the quality of the working performance of the oil pressure shock absorber is directly related to the riding comfort and the safety of the rail vehicle. In recent years, with the rapid development of the high-speed rail technology in China, the speed of rail vehicles is continuously improved, the technical requirements for resisting the snaking shock absorber are higher and higher, and the requirements for the damping force of the anti-snaking shock absorber are more and more diversified, particularly the damping performance at low speed and the damping performance of the shock absorber at low speed are mainly influenced by the common through hole of the valve system, in the prior dual-cycle anti-snake-like vibration absorber, the tensile damping force is mainly influenced by the constant through hole on the piston valve system, the compression damping force is the result of the combined action of the piston and the bottom valve, meanwhile, the flow of the normal through hole on the piston is more than N times of the normal through hole of the bottom valve, so that the figure of the indicator diagram of the shock absorber cannot have defects, and the indicator diagram cannot have defects when the damping force is qualified, when the indicator diagram is not defective, the damping force is unqualified, so that the flexibility of the damping adjustment of the shock absorber is limited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provided a rail transit vehicle is with anti snake oil hydraulic shock absorber of dual cycle, improved through being the system to traditional piston valve, the normal through-hole cancellation on piston valve system core valve originally to increase one set of check valve system on the direction is covered, separately adjust tensile and compression damping force, influence each other falls to minimumly, is showing the degree of difficulty that has reduced shock absorber damping force and adjust.

For solving above-mentioned technical problem at least, the utility model discloses the technical scheme who takes does:

a dual cycle anti-hunting oleo damper for a rail transit vehicle comprising: a guide cover unit including: direction lid and check valve system, the direction lid is equipped with oil return passage, the check valve system set up in the oil return passage, include: core valve, spring and valve bonnet, the both ends of spring respectively with return oil passageway's inner wall with the one end butt of core valve, the one end of core valve is equipped with first normal through-hole, and the lateral wall of core valve is equipped with first fluid window, during the tensile state, first fluid window passes through return oil passageway's inner wall seals, during the compression state, first fluid window with return oil passageway's inner wall dislocation is opened, the valve bonnet cover is located the other end of core valve is to its fixed seal.

Further, still be equipped with seal assembly in the direction lid, it includes: the clamping ring is arranged on the lower end face of the corrugated sealing ring, the clamping ring is sleeved on the corrugated sealing ring and abutted to the clamping ring, the sealing baffle ring is sleeved on the clamping ring and abutted to the clamping ring, the upper end of the sealing baffle ring is positioned on the clamping ring, the lower end of the sealing baffle ring is abutted to the clamping ring, and the nut is used for locking the sealing baffle ring.

Further, still include the piston unit, be equipped with the piston valve system in the piston through-hole of piston unit, the piston valve system includes: piston valve, piston valve spring and adjusting screw, the both ends of piston valve spring respectively with the inner wall of piston through-hole and the one end butt of piston valve, the other end of piston valve is equipped with adjusting screw, just be equipped with the second fluid window on the lateral wall of piston valve for the switching the piston valve.

Further, still include the bottom valve unit, the bottom valve unit includes: disk seat and bottom valve system, the disk seat is equipped with the middle part through-hole, the bottom valve system set up in the middle part through-hole, include: bottom core valve, adjusting screw and bottom valve spring, adjusting screw with the one end butt of bottom core valve, the one end of bottom core valve is equipped with second constant through-hole, and the lateral wall of bottom core valve is equipped with the third fluid window, is used for the switching bottom core valve, adjusting screw with the other end butt of bottom core valve.

Further, the bottom valve unit further includes: the compensating valve plate is arranged on the flow guide through hole and used for opening and closing the flow guide through hole, and two ends of the tower-shaped spring are respectively abutted to a convex shoulder of the valve seat and the compensating valve plate.

Further, the method also comprises the following steps: the oil return device comprises an inner cylinder and an outer cylinder, wherein an oil storage cavity is arranged between the inner cylinder and the outer cylinder, one end of the oil return channel is communicated with the oil storage cavity, and the other end of the oil return channel is communicated with the inner cylinder.

The beneficial effects of the utility model include at least: the utility model discloses guaranteeing to satisfy under the condition of original dual cycle shock absorber unique characteristic, through the overall arrangement that changes the valve system subassembly, change the shock absorber when low-speed and high-speed, the flow direction of fluid when the shock absorber is tensile and compressed separates the normal through-hole that influences the low-speed tensile and compression, does not influence each other, like this in design and debugging anti snake damping force, has increased the flexibility of design and debugging to greatly reduced the degree of difficulty of shock absorber damping force debugging.

Drawings

Fig. 1 is a schematic view of the structure of the guiding cover unit of the present invention.

Fig. 2 is a schematic diagram of the piston unit structure of the present invention.

Fig. 3 is a schematic view of the structure of the bottom valve unit of the present invention.

Fig. 4 is a working principle diagram of the oil pressure damper of the present invention at low speed.

Fig. 5 is a working principle diagram of the oil pressure damper of the present invention at high speed.

The oil-gas separating valve comprises a guide cover 1, an oil return channel 101, a core valve 2, a first constant through hole 201, a first oil window 202, a spring 3, a valve cover 4, an oil seal 5, a corrugated sealing ring 6, a pressing ring 7, a fastening ring 8, a sealing retainer ring 9 and a nut 10, wherein the guide cover is fixedly connected with the oil return channel 101; a piston valve 11, a second oil window 111, a piston valve spring 12 and an adjusting screw 13; the valve seat 14, the flow guide through hole 141, the shoulder 142, the bottom core valve 15, the second constant through hole 151, the third oil window 152, the adjusting screw 16, the bottom valve spring 17, the compensating valve plate 18 and the tower-shaped spring 19; a pilot cap unit 20, a piston unit 21, a base valve unit 22, an inner cylinder 23, an outer cylinder 24, and an oil reservoir chamber 25.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.

Example 1: rail transit vehicle is with anti snakeing oil hydraulic shock absorber of dual cycle, mainly include: the device comprises a guide cover unit, a piston unit, a bottom valve unit, an inner cylinder and an outer cylinder.

As shown in fig. 1, the guide cover unit includes: direction lid and check valve system, the direction lid is equipped with oil return passage, the check valve system set up in the oil return passage, include: the valve comprises a core valve, a spring and a valve cover, wherein two ends of the spring are respectively abutted against the inner wall of the oil return channel and one end of the core valve, one end of the core valve is provided with a first constant through hole, the side wall of the core valve is provided with a first oil window, and in a stretching state, the first oil window is closed through the inner wall of the oil return channel and only flows through the first constant through hole; during the compression state, because this spring force is very little, no matter be low-speed low discharge or high-speed large-traffic fluid pass through, it is all compressed by fluid easily, leads to core valve and oil return passage to throw off and produce relative displacement by the contact state, promptly first fluid window with oil return passage's inner wall dislocation is opened, and fluid is very easy to be passed through first fluid window circulation produces damping force during avoiding compressing. It can be understood that the caliber of the first oil window is larger than the first constant through hole.

The valve cover is sleeved at the other end of the core valve through bolts and fixedly seals the core valve.

In this embodiment, as shown in fig. 4, an oil storage chamber is provided between the inner tube and the outer tube, and one end of the oil return passage communicates with the oil storage chamber and the other end communicates with the inner tube.

As shown in fig. 1, a sealing assembly is further provided in the guide cover, and includes: the sealing device comprises an oil seal, a corrugated sealing ring, a pressing ring, a fastening ring, a sealing check ring and a nut, wherein the pressing ring is arranged on the lower end face of the corrugated sealing ring, the fastening ring is sleeved on the corrugated sealing ring and abutted to the pressing ring, the sealing check ring is sleeved on the fastening ring, the upper end of the sealing check ring is located on the upper end face of the corrugated sealing ring, the lower end of the sealing check ring is abutted to the pressing ring, and the nut is used for locking the sealing check ring and further locking all sealing components.

As shown in fig. 2, a piston valve system is disposed in the piston through hole of the piston unit, and the piston valve system includes: the two ends of the piston valve spring are respectively abutted against the inner wall of the piston through hole and one end of the piston valve, and the other end of the piston valve is provided with the adjusting screw for adjusting the pre-pressure of the piston valve spring; and a second oil window is arranged on the side wall of the piston valve, when low-speed small-flow oil passes through the piston valve, the second oil window passes through the outer wall of the adjusting screw to be closed, and when high-speed large-flow oil passes through the piston valve, the second oil window and the outer wall of the adjusting screw are opened in a staggered mode.

It can be understood that, as shown in fig. 4, the piston of the present invention is provided with two sets of piston valve systems with opposite directions, which respectively control the oil passages of stretching and compressing, which is a conventional technology in the field.

As shown in fig. 3, the base valve unit includes: disk seat and bottom valve system, the disk seat is equipped with the middle part through-hole, the bottom valve system set up in the middle part through-hole, include: the bottom core valve comprises a bottom core valve, an adjusting screw and a bottom valve spring, wherein the adjusting screw is abutted against one end of the bottom core valve, a second normal through hole is formed in one end of the bottom core valve, a third oil window is formed in the side wall of the bottom core valve, and when low-speed low-flow oil passes through the bottom core valve, the third oil window is closed through the outer wall of the adjusting screw and only passes through the second normal through hole; when high-speed large-traffic fluid passes through, restricted fluid through the second constant through-hole flows through, and the bottom valve spring is compressed this moment, and bottom core valve and adjusting screw are disengaged and produce relative displacement by the contact state, promptly the third fluid window is opened with the outer wall dislocation of adjusting screw. It can be understood that the aperture of the third oil window is larger than the second constant through hole.

The adjusting screw is abutted against the other end of the bottom core valve and used for adjusting the pre-pressure of the bottom valve spring.

In this embodiment, the base valve unit further includes: the compensating valve block is arranged on the flow guide through hole and used for opening and closing the flow guide through hole, and two ends of the tower-shaped spring are abutted against a convex shoulder of the valve seat and the compensating valve block respectively so as to facilitate complementation of the oil storage cavity and oil in the inner cylinder.

It can be understood that, as shown in fig. 4, two sets of bottom valve systems with opposite directions are arranged on the valve seat of the present invention, and the bottom valve systems respectively control the oil passage of stretching and compressing, which is a conventional technology in the field.

As shown in fig. 4, the working principle of the oil pressure damper of the present invention is as follows: in either the extended state (arrow shown in fig. a) or the compressed state (arrow shown in fig. b), the piston valve system on the piston cannot open the second oil window due to the low speed and small flow rate of oil, i.e. it does not work, and further: when the hydraulic cylinder is in a stretching state, oil only flows through the first normal through hole to generate stretching damping force, namely the damping force during stretching is controlled through the first normal through hole of the one-way valve system on the guide cover, and oil return is carried out through the second normal through hole and the flow guide through hole to supplement the inner cylinder; when the bottom valve is in a compression state, the third oil window cannot be opened by low-speed low-flow oil, at the moment, the oil only passes through the second normally-open hole to generate compression damping force, namely the damping force during compression is controlled by the second normally-open hole in the bottom core valve, and the first oil window is jacked open to return oil to supplement the inner cylinder, wherein the specific oil path is shown in the figure. Therefore, the stretching and the compression are controlled by different valve systems, the stretching and the compression damping forces can be respectively and specifically adjusted, and the adjustability of the damping force is improved.

As shown in fig. 5, the working principle of the oil pressure damper of the present invention at high speed is: in either the extended state (arrow shown in fig. c) or the compressed state (arrow shown in fig. d), the piston valve system on the piston opens the second oil window due to the high-speed large-flow oil, and the bottom valve system simultaneously opens the third oil window due to the high-speed large-flow oil, further: when the piston is in a stretching state, oil respectively flows through the first constant through hole and the second oil window to generate stretching damping force, namely the stretching damping force is jointly controlled by the valve system in the stretching direction of the piston and the constant through hole in the valve system of the guide cover, and oil return is carried out through the second constant through hole and the flow guide through hole to supplement the inner cylinder; when the piston is in a compression state, oil flows through the second oil window and the third oil window to generate compression damping force, namely the compression damping force is controlled by a valve system in the compression direction of the piston and a bottom valve system together, and the first oil window is jacked open to return oil to supplement the inner cylinder, wherein the specific oil path is shown in the figure. Therefore, the stretching and the compression are controlled by different valve systems, the stretching and the compression damping forces can be respectively and specifically adjusted, and the flexibility of adjusting the damping forces is improved.

To sum up, the utility model discloses under the condition of guaranteeing to satisfy original dual cycle shock absorber unique characteristic, through the overall arrangement that changes the valve system subassembly, change the shock absorber when low-speed and high-speed, the flow direction of fluid when the shock absorber is tensile and compression separates the normal through-hole that influences the low-speed tensile and compression, does not influence each other, like this in design and debugging anti snake line's damping force, has increased the flexibility of design and debugging to greatly reduced the degree of difficulty of shock absorber damping force debugging.

In the description of the present invention, it is to be understood that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "abutted," "fixed," and the like are to be construed broadly, e.g., as fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made in the above embodiments by those skilled in the art without departing from the scope of the present invention, and that various changes in the detailed description and applications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (6)

1. A dual cycle anti-hunting oleo damper for rail transit vehicles, comprising: a guide cover unit including: direction lid and check valve system, the direction lid is equipped with oil return passage, the check valve system set up in the oil return passage, include: core valve, spring and valve bonnet, the both ends of spring respectively with return oil passageway's inner wall with the one end butt of core valve, the one end of core valve is equipped with first normal through-hole, and the lateral wall of core valve is equipped with first fluid window, during the tensile state, first fluid window passes through return oil passageway's inner wall seals, during the compression state, first fluid window with return oil passageway's inner wall dislocation is opened, the valve bonnet cover is located the other end of core valve is to its fixed seal.

2. The dual cycle anti-hunting oleo damper for rail transit vehicles of claim 1 further including a seal assembly within said pilot cap including: the clamping ring is arranged on the lower end face of the corrugated sealing ring, the clamping ring is sleeved on the corrugated sealing ring and abutted to the clamping ring, the sealing baffle ring is sleeved on the clamping ring and abutted to the clamping ring, the upper end of the sealing baffle ring is positioned on the clamping ring, the lower end of the sealing baffle ring is abutted to the clamping ring, and the nut is used for locking the sealing baffle ring.

3. The dual cycle anti-hunting oleo damper for rail transit vehicles of claim 1 further comprising a piston unit having a piston valving disposed within a piston throughbore of said piston unit, said piston valving comprising: piston valve, piston valve spring and adjusting screw, the both ends of piston valve spring respectively with the inner wall of piston through-hole and the one end butt of piston valve, the other end of piston valve is equipped with adjusting screw, just be equipped with the second fluid window on the lateral wall of piston valve for the switching the piston valve.

4. The dual cycle anti-hunting oleo damper for rail transit vehicles of claim 3 further comprising a base valve unit, said base valve unit comprising: disk seat and bottom valve system, the disk seat is equipped with the middle part through-hole, the bottom valve system set up in the middle part through-hole, include: bottom core valve, adjusting screw and bottom valve spring, adjusting screw with the one end butt of bottom core valve, the one end of bottom core valve is equipped with second constant through-hole, and the lateral wall of bottom core valve is equipped with the third fluid window, is used for the switching bottom core valve, adjusting screw with the other end butt of bottom core valve.

5. The dual cycle anti-hunting oleo damper for rail transit vehicles of claim 4, wherein said base valve unit further comprises: the compensating valve plate is arranged on the flow guide through hole and used for opening and closing the flow guide through hole, and two ends of the tower-shaped spring are respectively abutted to a convex shoulder of the valve seat and the compensating valve plate.

6. The dual cycle anti-hunting oleo damper for a rail transit vehicle of claim 1, further comprising: the oil return device comprises an inner cylinder and an outer cylinder, wherein an oil storage cavity is arranged between the inner cylinder and the outer cylinder, one end of the oil return channel is communicated with the oil storage cavity, and the other end of the oil return channel is communicated with the inner cylinder.

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