Bidirectional hydraulic damping shock absorber

Abstract

The utility model relates to a two-way hydraulic damping shock absorber which comprises a connecting part used for bearing force and an oil cavity extending in the axial direction, the connecting part is provided with an oil sealing end configured to linearly move in the oil cavity, and the oil cavity is divided into an upper cavity body and a lower cavity body by the oil sealing end; the oil sealing end is provided with a backflow area which keeps the upper cavity and the lower cavity communicated with each other, when the oil sealing end moves in the oil cavity, oil liquid passes through the backflow area, and the drift diameter of the backflow area is configured to change through oil liquid pressure. According to the shock absorber, the first oil way and the second oil way are alternately matched, so that when the supporting part moves in the oil cylinder at different speeds, the opening degrees of the two oil ways can be correspondingly controlled under the action of the blocking piece, the low-speed buffering effect of the whole shock absorber is considered, and the service life of the shock absorber is prolonged. And meanwhile, the damping force is prevented from being too large during high-speed buffering, so that the effect of protecting the shock absorber is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to damper technical field, concretely is two -way hydraulic damping shock absorber. BACKGROUND

[0002] Two -way hydraulic shock absorber is mainly suitable for the vibration resistance of pipeline and equipment of nuclear power plant, thermal power plant, chemical plant, steel plant and so on, and it is often used for controlling the fluid vibration of impact (such as the impact of main steam door fast closing, safety valve discharge, water hammer, pipe breaking etc.) and the vibration of piping system of seismic disturbance, specifically, the structure is mainly composed of buffer spring, sleeve and hydraulic damper, buffer spring cooperates with inner and outer sleeve to form buffer structure, and then cooperates with hydraulic damper to achieve damping effect, wherein, the damping part is the key of the whole damping process.

[0003] At present, the hydraulic damper cannot effectively control the low-amplitude high-frequency or high-amplitude low-frequency vibration, specifically: because the aperture of the piston damping hole is fixed, when the oil passes through the damping hole quickly or slowly, the aperture cannot be changed correspondingly, so that the high-speed damping and the low-speed damping cannot be well considered. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the following technical problems in the prior art: because the aperture of the damping hole is fixed, the high-speed damping and the low-speed damping cannot be effectively considered during the damping process. To solve this technical problem, the utility model provides the following technical scheme:

[0006] Two -way hydraulic damping shock absorber, including damper, the damper includes the oil cylinder that extends axially and the connecting part for receiving force, specifically:

[0007] The connecting part has an oil blocking end configured to move linearly in the oil cavity, which intercepts the oil cavity into an upper cavity and a lower cavity;

[0008] The oil blocking end is configured with a backflow area that keeps the upper cavity and the lower cavity in communication, and when the oil blocking end moves in the oil cavity, the oil passes through the backflow area, and the backflow area is configured to change the oil pressure;

[0009] The connecting part includes at least a pressure rod, and the pressure rod is fixedly provided with a support portion and a guide portion;

[0010] The pressing rod is axially movable in the oil cylinder through the guide part;

[0011] The support part is intercepted in the space in the oil cylinder, and at least a first oil path and a second oil path, which are communicated at two ends, are arranged on the support part.

[0012] The first oil path and the second oil path are both provided with a blocking piece, and the blocking piece is movable through oil pressure.

[0013] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, a gap channel is formed between the periphery of the support part and the inner wall of the oil cylinder, an oil channel is formed through the two ends of the support part, an adapter area is arranged between the gap channel and the oil channel, an adjusting piece is arranged in the adapter area, and when the support part moves towards the first direction and the second direction respectively, the two sides of the support part are kept in communication with the oil channel through the adjusting piece, and the blocking piece acts on both ends of the oil channel.

[0014] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, the adjusting piece comprises a sealing ring arranged in the adapter area and in contact with the inner peripheral wall of the oil cylinder.

[0015] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, the blocking piece comprises a valve plate fixedly connected with the pressing rod and located at the oil channel port, and the valve plate has an elastic feature.

[0016] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, the valve plate covers the oil channel port, a small hole is formed in the valve plate, and the oil channel and the inner cavity of the oil cylinder are kept in communication through the small hole.

[0017] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, the number of valve plates is adjustable.

[0018] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, a limiting node is formed on the pressing rod, a locking part is detachably arranged on the pressing rod, the support part, the valve plate and the guide part are all sleeved with the pressing rod, and are limited to a fixed position through the limiting node and the locking part.

[0019] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, the locking part is threadedly connected with the pressing rod.

[0020] As the preferred technical solution of the bidirectional hydraulic damping shock absorber, a pad is arranged between the valve plate and the limiting node and between the valve plate and the locking part.

[0021] As the preferred technical scheme of the bidirectional hydraulic damping shock absorber, the pad setting part comprises the pad block and the pad piece which are attached to each other, and the pad piece is in contact with the valve piece.

[0022] The bidirectional hydraulic damping shock absorber has the beneficial effects that: through the alternate cooperation between the first oil path and the second oil path, when the supporting part moves in the oil cylinder at different speeds, the opening degree of the two oil paths can be controlled correspondingly under the action of the blocking piece, so that the low-speed buffering effect of the whole shock absorber is considered, and the damping force is prevented from being too large when high-speed buffering is considered, so that the protection effect of the shock absorber is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor. Among them:

[0024] Figure 1 It is a partial structure schematic view of one of the embodiments of the utility model.

[0025] Figure 2 It is another view of Figure 1 .

[0026] Figure 3 It is a split view of Figure 1 .

[0027] Figure 4 It is a vertical cutting schematic view of the structure shown in Figure 1 .

[0028] Figure 5 It is a structure schematic view of the valve plate in the embodiment of the utility model.

[0029] Figure 6 It is Figure 1 in the use state.

[0030] Figure 7 It is Figure 1 in another use state.

[0031] The drawings show that 1 is an oil cylinder, 2 is a pressure rod, 3 is a supporting part, 4 is a guide part, 5 is a blocking piece, 501 is a valve piece, 6 is a gap channel, 7 is a connection area, 8 is an oil channel, 9 is an adjusting piece, 901 is a sealing ring, 10 is a small hole, 11 is a limiting node, 12 is a locking part, 13 is a pad setting part, 13a is a pad block, and 13b is a pad piece. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings of the specification.

[0033] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0034] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the utility model. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0035] Thirdly, the utility model is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the utility model, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the utility model herein. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacturing.

[0036] Referring to Figures 1-7 One embodiment of the utility model provides a bidirectional hydraulic damping shock absorber, which comprises a buffer spring, a sleeve ring part and a damper, the buffer spring and the sleeve part are not shown in the drawing, the damper comprises an oil cavity, a connecting part and a support part 3 and a guide part 4 fixedly arranged on the connecting part, the connecting part is used for connecting the outer sleeve of the shock absorber, which adopts the structure of a press rod 2 here, the oil cavity is used for loading oil, which is provided by an oil cylinder 1 here, the oil cavity is indicated inside the oil cylinder 1, specifically:

[0037] The guide part 4 is fixed on the press rod 2, the circumference diameter is matched with the inner diameter of the oil cylinder 1, so that the press rod 2 can move axially in the oil cylinder 1 through the guide part 4;

[0038] The support part 3 intercepts the space in the oil cylinder 1, and at least a first oil path and a second oil path keeping two ends communicating are arranged on the support part 3, when the support part 3 moves in the first direction and the second direction in the oil cylinder 1 respectively, the first oil path and the second oil path keep open respectively;

[0039] The first oil path and the second oil path are both provided with a blocking piece 5, which is used for forming a blocking effect on the oil passing through the first oil path and the second oil path, the blocking piece 5 can move away from the oil path port through the pressure of the oil.

[0040] As Figure 6 shown in the perspective view, the space in the oil cylinder 1 above the support part 3 is referred to as the upper cavity, and the space below the support part 3 to the bottom of the oil cylinder 1 is referred to as the lower cavity. In the process of damping, when the pressure rod 2 and the oil cylinder 1 are stretched in the damping direction, the support part 3 moves in the direction of pulling out the oil cylinder 1, that is Figure 6 , the support part 3 moves upward, and at this time, the oil in the upper cavity moves from the first oil path to the lower cavity. Normally, the blocking part does not completely block the first oil path port, and the oil can flow normally. When the support part 3 moves quickly during rapid damping, the oil quickly passes through the first oil path, the extrusion force of the oil on the blocking part increases, the blocking part moves correspondingly, thereby reducing the blocking effect of the first oil path port, and the oil flows more smoothly, so that the resistance of the pressure rod 2 moving in the oil cylinder 1 is correspondingly reduced, thereby preventing the damping force from being too large to damage the entire damper part;

[0041] When the pressure rod 2 and the oil cylinder 1 move in the compression direction, the principle is the same as above. At this time, the second oil path is opened and participates in the damping work, which corresponds to Figure 7 the state shown in the perspective view.

[0042] Further, referring to Figure 4 , Figure 6 and Figure 7 , regarding the configuration of the first oil path and the second oil path, specifically, a gap channel 6 is formed between the outer side of the support part 3 and the inner wall of the oil cylinder 1, an oil channel 8 is formed through the two ends of the support part 3, and an adapter area 7 is arranged between the gap channel 6 and the oil channel 8 to keep them in communication. An adjusting part 9 is arranged in the adapter area 7. When the support part 3 moves in the first direction and the second direction respectively, the two sides of the support part 3 keep in communication with the oil channel 8 through the adapter area 7 under the action of the adjusting part 9, thereby forming switchable first and second oil paths. The blocking part 5 is used to block the two ends of the oil channel 8, thereby realizing the effect that the oil passing speed of the first oil path and the second oil path changes correspondingly with the pressure.

[0043] Further, referring to Figures 2-7 , the adjusting part 9 includes a sealing ring 901 arranged in the adapter area 7 and in contact with the inner circumferential wall of the oil cylinder 1, as Figure 6 and Figure 7 shown in the perspective view, when the support part 3 moves upward or downward respectively, the sealing ring 901 moves downward or upward on the support part 3 respectively under the action of the oil cylinder 1, thereby contacting the lower wall surface and the upper wall surface of the adapter area 7 respectively, thereby guiding the oil in two directions and realizing the effect that the oil passes through the first oil path and the second oil path respectively.

[0044] Further, referring to Figures 2-7 , the blocking piece 5 includes a valve piece 501 which is fixedly connected with the pressing rod 2 and is located at the port of the oil passage 8, the valve piece 501 forms a covering effect at the port to limit the flow speed of the oil, the valve piece 501 has an elastic feature, when the oil speed increases, the valve piece 501 is elastically deformed under force to move away from the port to ensure the acceleration of the oil.

[0045] Further, referring to Figure 3 and Figure 5 , the valve piece 501 completely covers the port of the oil passage 8, regarding the passing of the oil, specifically, a small hole 10 is formed on the face of the valve piece 501, the oil passage 8 is in communication with the inner cavity of the oil cylinder 1 through the small hole 10, the oil flows through the small hole 10 when reaching the port of the oil passage 8; and the number of the valve piece 501 here is adjustable, so that according to the use of the whole shock absorber, how many valve pieces 501 need to be set can be selected, for example, when the shock absorber is used on large equipment, the damping force needs to be larger, a plurality of valve pieces 501 can be set, on the contrary, when the equipment is light, the setting of the valve piece 501 can be reduced.

[0046] Further, referring to Figures 2-7 , regarding the fixing mode of the supporting part 3 and the guiding part 4 on the pressing rod 2, specifically, a limiting node 11 is formed on the pressing rod 2, a locking part 12 is detachably arranged on the pressing rod 2, the supporting part 3, the valve piece 501 and the guiding part 4 are all sleeved with the pressing rod 2 and are limited at the fixed position on the pressing rod 2 through the limiting node 11 and the locking part 12, when the corresponding parts are replaced, the locking part 12 can be detached, so that the assembly of the utility model is facilitated; specifically, the locking part 12 can adopt a structure such as a nut, which is connected with the pressing rod 2 through thread cooperation.

[0047] Further, referring to Figures 2-7 , in the utility model, the damper further includes a pad part 13, the pad part 13 is arranged between the valve piece 501 and the limiting node 11 and between the valve piece 501 and the locking part 12, the pad part 13 can directly replace the contact between the valve piece 501 and the limiting node 11 and the locking part 12, thereby protecting the valve piece 501.

[0048] Further, referring to Figures 2-7 , the pad part 13 includes a pad block 13a and a pad piece 13b which are attached to each other, the pad piece 13b contacts the valve piece 501, the circumference of the pad piece 13b is smaller than that of the pad block 13a, so that the normal deformation process of the valve piece 501 is not blocked.

[0049] It is to be understood that the development of the particular implementations described herein was not determined merely by the availability of certain items or materials. Rather and more generally, specific implementations were developed to provide implementations that are functionally, economically, and / or esthetically practical, in light of ongoing technological changes having economic, business, and / or social consequences.

[0050] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, not to limit, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalent, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. Bidirectional hydraulic damping shock absorber, characterized by: It includes a connection portion for receiving force and an axially extending oil chamber, and: The connecting portion has an oil sealing end configured to move linearly in the oil chamber, which divides the oil chamber into an upper chamber and a lower chamber; The oil sealing end is provided with a reflux area for maintaining the upper cavity and the lower cavity in communication. When the oil sealing end moves in the oil cavity, the oil passes through the reflux area. The diameter of the reflux area is configured to change according to the oil pressure.

2. The bidirectional hydraulic damping shock absorber according to claim 1, characterized in that: The reflux zone includes a first oil circuit and a second oil circuit which are arranged on the oil sealing end and respectively maintain the upper cavity and the lower cavity to form mutual communication. When the oil sealing end moves in the first direction and the second direction respectively in the oil cylinder, the first oil circuit and the second oil circuit are respectively opened. The first oil circuit and the second oil circuit are both provided with a blocking member (5) which moves by oil pressure.

3. The bidirectional hydraulic damping shock absorber according to claim 2, characterized in that: The oil sealing end comprises a support portion (3) and a guide portion (4) fixedly arranged on the connecting portion; the connecting portion moves axially in the oil cylinder via the guide portion (4); and the first oil circuit and the second oil circuit are both arranged on the support portion (3).

4. The bidirectional hydraulic damping shock absorber according to claim 3, characterized in that: A gap channel (6) is formed between the peripheral side of the support portion (3) and the inner wall of the oil chamber, an oil channel (8) is formed between the two ends of the support portion (3), a connecting area (7) is provided between the gap channel (6) and the oil channel (8), and an adjusting member (9) is provided in the connecting area (7). When the support portion (3) moves toward the first direction and the second direction respectively, the two sides of the support portion (3) are kept in communication with the oil channel (8) through the adjusting member (9), and the blocking member (5) acts on the two ends of the oil channel (8).

5. The bidirectional hydraulic damping shock absorber according to claim 4, characterized in that: The regulating member (9) includes a sealing ring (901), which is arranged in the connecting area (7) and contacts the inner peripheral wall of the oil chamber.

6. The bidirectional hydraulic damping shock absorber according to claim 4, characterized in that: The blocking member (5) comprises a valve plate (501) which is fixedly connected to the connecting portion and is located at the end of the oil channel (8); the valve plate (501) has elastic characteristics.

7. The bidirectional hydraulic damping shock absorber according to claim 6, characterized in that: The valve plate (501) covers the port of the oil channel (8), and a small hole (10) is formed on the valve plate (501). The oil channel (8) and the oil chamber are kept in communication through the small hole (10).

8. The bidirectional hydraulic damping shock absorber according to claim 6, characterized in that: The number of the valve plates (501) is configured to be adjustable.

9. The bidirectional hydraulic damping shock absorber according to claim 8, characterized in that: A limit node (11) is constructed on the connecting portion, and a locking portion (12) is detachably provided on the connecting portion. The supporting portion (3), the valve plate (501) and the guide portion (4) are all fitted with the connecting portion and are restricted to a fixed position by the limit node (11) and the locking portion (12).

10. The bidirectional hydraulic damping shock absorber according to claim 9, characterized in that: It also includes a padding portion (13), and a padding portion (13) is provided between the valve plate (501) and the limit node (11) and between the valve plate (501) and the locking portion (12).

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