阅读说明：本技术 吸震器、液压系统和作业机械设备 (Shock absorber, hydraulic system, and work machine apparatus ) 是由 朱雄文 于 2020-07-20 设计创作，主要内容包括：本发明提供了一种吸震器、液压系统和作业机械设备。吸震器包括：缸体,具有腔体；活塞,设于腔体内,并将腔体分隔为第一内腔和第二内腔；弹性件,设于第一内腔内,并与活塞和缸体连接；及流量调节阀组；其中,第一内腔通过流量调节阀组单向向外导通,且流量调节阀组用于限定流体介质进入第一内腔的通流面积,第二内腔用于充入工作介质。本发明能够使工作介质液压油缓慢进入液压系统,不会对液压回油管路造成新的压力冲击,回油更加平稳。(The invention provides a shock absorber, a hydraulic system and a working machine. The shock absorber includes: a cylinder body having a cavity; the piston is arranged in the cavity and divides the cavity into a first inner cavity and a second inner cavity; the elastic piece is arranged in the first inner cavity and is connected with the piston and the cylinder body; and a flow regulating valve group; the first inner cavity is communicated outwards in one way through the flow regulating valve group, the flow regulating valve group is used for limiting the flow area of fluid media entering the first inner cavity, and the second inner cavity is used for filling working media. The invention can ensure that the working medium hydraulic oil slowly enters the hydraulic system, does not cause new pressure impact on a hydraulic oil return pipeline, and has more stable oil return.)

1. A shock absorber, comprising:

a cylinder body having a cavity;

the piston is arranged in the cavity and divides the cavity into a first inner cavity and a second inner cavity;

the elastic piece is arranged in the first inner cavity and is connected with the piston and the cylinder body; and

a flow regulating valve group;

the first inner cavity is communicated outwards in one way through the flow regulating valve group, the flow regulating valve group is used for limiting the flow area of fluid media entering the first inner cavity, and the second inner cavity is used for filling working media.

2. The shock absorber according to claim 1, wherein said flow control valve block is disposed on said cylinder, said cylinder including a first inner chamber side wall, said flow control valve block comprising:

the flow hole is arranged on the side wall of the first inner cavity;

the one-way valve is arranged in the through hole, and the inlet end of the one-way valve is communicated to the first inner cavity; and

and the flow limiting structure is arranged on the side wall of the first inner cavity and is used for limiting the flow area of the fluid medium entering the first inner cavity.

3. A shock absorber according to claim 2, wherein said flow restricting structure comprises:

the adjustable throttle valve is used for adjusting the flow area of the fluid medium entering the first inner cavity; or

A damping orifice for restricting the flow area of fluid medium entering the first interior chamber.

4. The shock absorber according to claim 2, wherein said cylinder body further comprises:

the first circulation port is arranged on the side wall of the first inner cavity and is used for circulating fluid media to enter and exit the first inner cavity;

the flow regulating valve group is arranged in the first circulation port, and the first circulation port and the first inner cavity can be communicated with each other through the flow regulating valve group.

5. A shock absorber according to claim 4,

the flow regulating valve group is an electromagnetic valve and is used for controlling the flow of fluid media entering and exiting the first inner cavity; or

The flow regulating valve group is a one-way throttle valve, and the inlet end of the one-way throttle valve is communicated with the first inner cavity.

6. A shock absorber according to any one of claims 1 to 5, further comprising:

the oil groove is annularly arranged on the outer surface of the piston, which is in contact with the cylinder body;

wherein, the oil groove is provided with one or more.

7. The shock absorber according to claim 6, wherein said cylinder body further comprises:

a second lumen sidewall;

and the second circulation port is arranged on the side wall of the second inner cavity and used for circulating the working medium so as to enable the working medium to enter and exit the second inner cavity.

8. A hydraulic system, comprising:

a shock absorber according to any one of claims 1 to 7;

one end of the first hydraulic pipeline is communicated with the first inner cavity;

one end of the second hydraulic pipeline is communicated with the second inner cavity;

a hydraulic tank;

and the other end of the first hydraulic pipeline and the other end of the second hydraulic pipeline are communicated to the hydraulic tank respectively.

9. The hydraulic system of claim 8, further comprising:

an oil return line;

and the second hydraulic pipeline is communicated to the hydraulic tank through the oil return pipeline.

10. A work machine apparatus, comprising:

the shock absorber according to any one of claims 1 to 7, said shock absorber being provided on a hydraulic circuit of said work machine apparatus; or

A hydraulic system as claimed in claim 8 or 9.

Technical Field

The application relates to the technical field of hydraulic control systems, in particular to a shock absorber, a hydraulic system and operation mechanical equipment.

Background

In the related art, the reversing valve is used in a hydraulic system, when the control valve is reversed, a large pressure shock is generated, for example, on an oil return pipeline, the pressure shock generated by the reversing valve directly acts on low-pressure components such as a radiator, an oil return filter element and the like, so that the service life of the low-pressure components is shortened, and equipment failure is caused.

Disclosure of Invention

Embodiments according to the present invention aim to solve or improve at least one of the above technical problems.

A first object according to an embodiment of the present invention is to provide a shock absorber.

It is a second object according to an embodiment of the present invention to provide a hydraulic system.

A third object according to an embodiment of the present invention is to provide a work machine apparatus.

To achieve the first object according to an embodiment of the present invention, there is provided a shock absorber including: a cylinder body having a cavity; the piston is arranged in the cavity and divides the cavity into a first inner cavity and a second inner cavity; the elastic piece is arranged in the first inner cavity and is connected with the piston and the cylinder body; and a flow regulating valve group; the first inner cavity is communicated outwards in one way through the flow regulating valve group, the flow regulating valve group is used for limiting the flow area of fluid media entering the first inner cavity, and the second inner cavity is used for filling working media.

In this technical scheme, the second inner chamber is used for filling into working medium, and when system pressure impact produced, working medium got into the second inner chamber and acted on the piston, and the elastic component atress is compressed, and the fluid medium in the first inner chamber passes through flow control valves and flows out first inner chamber, because first inner chamber passes through one-way outside switch-on of flow control valves, and the fluid medium in the first inner chamber can discharge fast, therefore the second inner chamber can absorb working medium in order to reduce system impact fast. After the pressure impact of the system is eliminated, the elastic part extends, the flow regulating valve group performs flow regulation, negative pressure is formed in the first inner cavity after the elastic part extends, the flow regulating valve group is used for limiting the flow area of fluid media entering the first inner cavity, the fluid media slowly enter the first inner cavity under the throttling action, the extension speed of the elastic part is reduced, the piston slowly moves, and the working media in the second inner cavity slowly flow back, so that new pressure impact on a loop of the system can be avoided, and the service life of the impact element is prolonged.

In addition, the technical solution provided by the embodiment of the present invention may further have the following additional technical features:

among the above-mentioned technical scheme, flow control valves include: flow control valve group locates on the cylinder body, and the cylinder body includes first inner chamber lateral wall, and flow control valve group includes: the flow hole is arranged on the side wall of the first inner cavity; the one-way valve is arranged in the through hole, and the inlet end of the one-way valve is communicated to the first inner cavity; and the flow limiting structure is arranged on the side wall of the first inner cavity and is used for limiting the flow area of the fluid medium entering the first inner cavity.

In the technical scheme, the circulation hole is formed in the press cover and can be communicated with the external space and the first inner cavity, and the one-way valve is arranged in the circulation hole to enable the fluid medium to flow out of the first inner cavity. The flow limiting structure is arranged on the pressure cover and used for enabling the fluid medium to enter the first inner cavity in a negative pressure state of the first inner cavity. The flow hole is mainly used for installing a one-way valve, the one-way valve comprises a spring and a ball body, and the ball body can block a passage between the flow hole and the first inner cavity. In order to facilitate the installation of the one-way valve, the circulation hole extends to the first inner cavity and also extends to the outer surface of the gland, one end of a spring of the one-way valve is connected with the mounting seat, the mounting seat is installed on the gland, and a sealing structure is arranged between the mounting seat and the circulation hole to prevent leakage of fluid media.

In any of the above technical solutions, the flow restricting structure includes: the adjustable throttle valve is used for adjusting the flow area of the fluid medium entering the first inner cavity; or a damping orifice for restricting the flow area of the fluid medium into the first interior chamber.

In this solution, the flow of the fluid medium into the first interior chamber can be regulated by means of an adjustable throttle or a damping orifice. In particular, a damping orifice may be provided to achieve the effect of regulating the flow of fluid medium into the first interior chamber. The diameter of the damping hole is smaller than that of the circulation hole, the damping hole and the circulation hole are respectively communicated with an inlet and an outlet through fluid media, namely, the damping hole and the circulation hole form a parallel structure, and the damping hole is ensured to enable the fluid media to flow into the first inner cavity when the first inner cavity is in a negative pressure working state. The diameter of the damping hole is smaller than that of the circulation hole, the damping hole and the circulation hole are respectively communicated with an inlet and an outlet through fluid media, namely, the damping hole and the circulation hole form a parallel structure, and the damping hole is ensured to enable the fluid media to flow into the first inner cavity when the first inner cavity is in a negative pressure working state. The orifice may be replaced by an adjustable throttle valve, the function of which is equivalent to that of the orifice and will not be described further herein.

In any one of the above technical solutions, the cylinder body further includes: the first circulation port is arranged on the side wall of the first inner cavity and is used for circulating the fluid medium to enter and exit the first inner cavity; wherein, flow control valve group is located first circulation mouth, and flow control valve group can make first circulation mouth and first inner chamber communicate each other.

In the technical scheme, the first circulation port is arranged on a gland forming part of the cylinder body and used for circulating the fluid medium so as to enable the fluid medium to enter and exit the first inner cavity. Specifically, the gland has outside bulge, and first circulation opening runs through the bulge and communicates each other with damping hole and circulation hole respectively, and the internal diameter of first circulation opening is greater than the internal diameter of circulation hole, can guarantee more smoothly that fluid medium passes through first circulation opening business turn over first inner chamber.

In any of the above technical solutions, the flow regulating valve group is an electromagnetic valve for controlling the flow of the fluid medium into and out of the first inner cavity; or the flow regulating valve group is a one-way throttle valve, and the inlet end of the one-way throttle valve is communicated with the first inner cavity.

In the technical scheme, the damping hole and the one-way valve can be replaced by the electromagnetic valve, and the electromagnetic valve is an automatic basic element for controlling fluid media by electromagnetism, belongs to an actuator and is not limited to hydraulic pressure and pneumatic pressure. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. There are many types of solenoid valves, and different solenoid valves function at different locations in the control system and will not be described further herein. The flow rate of the fluid medium entering and exiting the first inner cavity is controlled by the outsourcing solenoid valve, the structure can be simplified, and the production efficiency of the shock absorber is improved. A throttle valve is a valve that controls the flow of fluid by changing the throttle section or throttle length. The throttle valve and the one-way valve are connected in parallel to form the one-way throttle valve.

In any one of the above technical solutions, the shock absorber further includes: the oil groove is annularly arranged on the outer surface of the piston, which is in contact with the cylinder body; wherein, the oil groove sets up one or more.

In this technical scheme, process several oil grooves on the lateral wall of piston, the oil groove uses as equalizer groove and seal groove, and the effect in equalizer groove prevents that the piston card from dying, falls to the minimum with frictional resistance simultaneously. The sealing groove is used for preventing liquid in the second inner cavity from largely leaking to the first inner cavity. A small amount of leakage is allowed between the first and second lumens, which can increase the sensitivity of the piston movement.

In any one of the above technical solutions, the cylinder body further includes: a second lumen sidewall; and the second circulation port is arranged on the side wall of the second inner cavity and used for circulating the working medium so as to enable the working medium to enter and exit the second inner cavity.

In this embodiment, the second fluid port may be used for the circulation of the working medium, so that the working medium enters and exits the second lumen. The cylinder body is provided with a convex part, and the second flow port penetrates through the convex part and is communicated to the second inner cavity. The second flow port is arranged to facilitate the working medium to enter and exit the second inner cavity.

To achieve the second object according to an embodiment of the present invention, there is provided a hydraulic system including: a shock absorber; one end of the first hydraulic pipeline is communicated with the first inner cavity; one end of the second hydraulic pipeline is communicated with the second inner cavity; an oil tank; the other end of the first hydraulic pipeline and the other end of the second hydraulic pipeline are respectively communicated to an oil tank.

In the technical scheme, the fluid medium is liquid, and the other end of the working hydraulic pipeline extends into an oil tank for containing the liquid. One end of the first hydraulic pipeline is communicated with the first circulation port, and the other end of the working hydraulic pipeline extends into the oil tank, so that fluid media can be conveyed conveniently. The working medium is the same as the fluid medium and is liquid, one end of the second hydraulic pipeline is connected with the second circulation port, and the other end of the second hydraulic pipeline can be connected into the oil tank, so that liquid can be filled into the second inner cavity more conveniently or the liquid can flow back to the oil tank more conveniently. In addition, since the hydraulic system according to the embodiment of the present invention has the shock absorber according to any one of the embodiments of the present invention, the hydraulic system according to the embodiment of the present invention has all the advantageous effects of the shock absorber according to any one of the embodiments of the present invention, and thus, will not be described in detail herein.

In any of the above technical solutions, the hydraulic system further includes: an oil return line; the second hydraulic pipeline is communicated to the oil tank through an oil return pipeline.

In the technical scheme, the second hydraulic pipeline is arranged on the hydraulic circuit, so that hydraulic oil on the hydraulic circuit is used as a working medium, energy is saved, and the structure is simplified. In addition, the shock absorber is arranged on a hydraulic circuit of the reversing hydraulic system, so that the impact on a low-pressure element after reversing can be reduced.

To achieve the third object according to an embodiment of the present invention, there is provided a work machine apparatus including: the shock absorber in any embodiment is arranged on a hydraulic circuit of the working machine equipment; or the hydraulic system of any embodiment.

In this technical solution, the work machine apparatus according to the embodiment of the present invention has the shock absorber according to any of the embodiments of the present invention, and therefore the work machine apparatus according to the embodiment of the present invention has all the advantageous effects of the shock absorber according to any of the embodiments of the present invention, which will not be described in detail herein.

Additional aspects and advantages of embodiments in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments in accordance with the invention.

Drawings

Fig. 1 is a longitudinal sectional structural view of an accumulator according to an embodiment of the related art;

FIG. 2 is a schematic structural diagram illustrating the use of an accumulator according to an embodiment of the related art;

figure 3 is one of schematic cross-sectional structural views of a shock absorber according to some embodiments of the present invention;

figure 4 is a second schematic cross-sectional view of a shock absorber according to some embodiments of the present invention;

FIG. 5 is a schematic structural diagram of a hydraulic system according to some embodiments of the present disclosure;

FIG. 6 is one of the components of a work machine apparatus according to some embodiments of the present disclosure;

fig. 7 is a second schematic diagram of a work machine apparatus according to some embodiments of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

100': spring accumulator, 110': cylinder structure, 112': air vent, 120': piston assembly, 130': tank, 140': and (4) the atmosphere.

Wherein, the correspondence between the reference numbers and the part names in fig. 3 to 7 is:

1: a work machine device; 10: a hydraulic system; 100: a shock absorber; 110: a cylinder body; 112: a cavity; 1122: a first lumen; 1124: a second lumen; 114: a first lumen sidewall; 116: a first circulation port; 118: a second flow port; 119: a second lumen sidewall; 120: a resilient piston assembly; 122: a piston; 1222: an outer surface; 124: an oil sump; 126: an elastic member; 130: a flow regulating valve group; 132: a flow-through hole; 134: a one-way valve; 1342: an inlet end; 136: a flow restricting structure; 160: a gland; 170: a mounting seat; 200: an oil tank; 300: a first hydraulic line; 400: a second hydraulic line; 500: an oil return line; 20: a hydraulic circuit.

Detailed Description

In order that the above objects, features and advantages of embodiments in accordance with the present invention can be more clearly understood, embodiments in accordance with the present invention are described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the invention, however, embodiments according to the invention may be practiced in other ways than those described herein, and therefore the scope of embodiments according to the invention is not limited by the specific embodiments disclosed below.

In the related art, an accumulator is used in many hydraulic systems to absorb pressure shocks in the return line. The energy accumulator is divided into an inflatable type and a spring type. As shown in fig. 1 and 2, the spring type accumulator 100' has a structure including: the cylinder body structure 110 ' is a cavity structure, the piston assembly 120 ' includes a tension spring, the piston assembly 120 ' divides the cavity structure into two chambers, one of the chambers is filled with hydraulic oil through the oil tank 130 ', and the hydraulic oil returns to the oil tank 130 '. The other part of the chamber is provided with a tension spring, the side wall of the other part of the chamber is provided with an air hole 112 ', and the air hole 112 ' is communicated with the atmosphere 140 '. As shown in fig. 2, the spring type accumulator 100' operates on the principle of storing and releasing pressure energy by compression and extension of a tension spring. When the system pressure impact is generated, the tension spring is compressed, the pressure impact is absorbed, and energy is stored in the form of deformation of the tension spring. After the system pressure shock disappears, the tension spring of the spring type energy accumulator 100' extends to release the energy stored before.