CN220415852U

CN220415852U - Energy accumulator and engineering machinery

Info

Publication number: CN220415852U
Application number: CN202321843673.4U
Authority: CN
Inventors: 刘伟涛
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-01-30
Anticipated expiration: 2033-07-13

Abstract

The utility model relates to the technical field of energy accumulators, and provides an energy accumulator and engineering machinery, wherein the energy accumulator comprises: the energy accumulator comprises an energy accumulator body, an air bag and a bearing piece, wherein the energy accumulator body is provided with a cavity, a fungus valve is arranged at a first end of the energy accumulator body, and an inflation valve is arranged at a second end of the energy accumulator body; the air bag is arranged in the cavity and is communicated with the inflation valve; the bearing piece is arranged in the cavity and connected with the mushroom valve, one end of the bearing piece corresponding to the air bag is provided with a bearing surface, and the area of the bearing surface is larger than that of the supporting surface of the mushroom valve. The air bag provided by the utility model acts on the bearing piece in the expansion process, so that the air bag is prevented from directly acting on the mushroom valve, the bearing surface area of the bearing piece is larger than the area of the supporting surface of the mushroom valve, the contact area of the air bag is increased, the buffering effect is improved, the deformation degree of the contact surface of the air bag is reduced, the air bag cannot excessively contact with the mushroom valve, the air bag is prevented from being damaged due to collision of the air bag with the mushroom valve in each expansion process, the service life of the air bag of the energy accumulator is prolonged, and the cost is reduced.

Description

Energy accumulator and engineering machinery

Technical Field

The utility model relates to the technical field of energy accumulators, in particular to an energy accumulator and engineering machinery.

Background

The accumulator is an energy storage device in a hydropneumatic system that is used to store excess pressurized oil and is released to the system when needed. For example, when the hydraulic transmission system is needed, the pressure liquid stored in the accumulator is released under the action of the loading device and is conveyed into the hydraulic transmission system to work; when the working fluid in the hydraulic transmission system is excessive, the excessive fluid can overcome the acting force of the loading device and enter the energy accumulator to be stored. Therefore, the energy accumulator is not only a hydraulic source of the hydraulic transmission system, but also an absorbing and storing device for redundant energy of the hydraulic transmission system.

In the prior art, at the contact position of the fungus type valve and the air bag, the air bag is weakest, the air bag is more easily extruded and damaged, and particularly for a specific high impact working condition of a pump truck, due to large impact of a system, the instantaneous excessive oil discharge of an energy accumulator is often caused when oil is discharged, so that the air bag is excessively contacted with the top end of a valve rod of the fungus type valve, the air bag is clamped between the fungus type valve and a valve body, and due to sharp edges of the fungus type valve, the air bag is often directly cut and damaged.

Disclosure of Invention

The utility model provides an energy accumulator and engineering machinery, which are used for solving the defect that an air bag is damaged due to excessive contact between the air bag and a mushroom valve when the energy accumulator releases liquid in the prior art.

In a first aspect, the present utility model provides an accumulator comprising:

the energy accumulator body is provided with a cavity, a fungus valve is arranged at the first end of the energy accumulator body, and an inflation valve is arranged at the second end of the energy accumulator body;

the air bag is arranged in the cavity and is communicated with the inflation valve;

the bearing piece is arranged in the cavity, the bearing piece is connected with the mushroom valve, a bearing surface is arranged at one end of the bearing piece corresponding to the air bag and used for bearing the air bag, and the area of the bearing surface is larger than that of the supporting surface of the mushroom valve.

According to the energy accumulator provided by the utility model, the bearing surface of the bearing piece is a concave arc surface.

According to the energy accumulator provided by the utility model, the bearing surface of the bearing piece is a plane.

According to the energy accumulator provided by the utility model, the thickness of one end, close to the bearing surface, of the air bag is larger than the thickness of the part, used for being in contact with the inner wall of the cavity, of the air bag.

According to the energy accumulator provided by the utility model, the diameter of the bearing piece is smaller than the diameter of the cavity.

According to the accumulator provided by the utility model, the mushroom valve comprises a valve rod and a valve body, the valve body is arranged at a port of the second end of the accumulator body, the valve rod is axially and movably arranged in the valve body, the valve rod is sleeved with a spring, and one end of the valve rod corresponding to the air bag is connected with the supporting piece.

According to the energy accumulator provided by the utility model, the port at the second end of the energy accumulator body is provided with the sealing ring, and the valve body is connected with the energy accumulator body through the sealing ring.

According to the energy accumulator provided by the utility model, the outer part of the charging valve is provided with the protective cap.

According to the energy accumulator provided by the utility model, the supporting piece is fixedly connected with the valve rod.

In a second aspect, the utility model provides a working machine comprising a hydraulic system provided with an accumulator as described in the first aspect.

The energy accumulator provided by the utility model comprises an energy accumulator body, the mushroom valve, the air charging valve, the air bag, the mushroom valve and the bearing piece, wherein the air bag acts on the bearing piece in the expansion process, so that the air bag is prevented from directly acting on the mushroom valve, the contact area of the air bag is increased due to the fact that the area of the bearing surface of the bearing piece is larger than that of the supporting surface of the mushroom valve, the buffering effect is improved, meanwhile, the deformation degree of the contact surface of the air bag is reduced, the air bag cannot excessively contact with the mushroom valve, the air bag is prevented from being damaged due to the fact that the air bag impacts the mushroom valve in each expansion process, the service life of the air bag of the energy accumulator is prolonged, and the cost is reduced.

The utility model also provides a construction machine comprising a hydraulic system in which the accumulator described in the first aspect is arranged. When the energy accumulator is required to convey liquid to the hydraulic system, the air bag of the energy accumulator is expanded to contact with the bearing piece at first, the bearing surface area of the bearing piece is larger than the area of the supporting surface of the mushroom valve, the thickness of the air bag is increased, the contact area of the air bag is increased, the air bag can be compressed to buffer part of impact force, the pressure of gas in the air bag is gradually increased to be larger than the elastic force of the spring, the spring on the valve rod is compressed, and the air bag is arranged in such a way that the impact force born by the mushroom valve is reduced, and meanwhile, the air bag of the energy accumulator is firstly contacted with the bearing piece to be buffered, and the air bag is protected, so that the cost of replacing the energy accumulator can be reduced, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an accumulator provided in an embodiment of the present utility model;

FIG. 2 is a schematic view of a first end of an accumulator body according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a second end of an accumulator body according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an accumulator according to another embodiment of the present utility model;

fig. 5 is a schematic diagram of an accumulator of the prior art.

Reference numerals:

1. an accumulator body; 2. an air bag; 3. a support; 4. a mushroom valve; 41. a valve stem; 42. a valve body; 43. a spring; 44. a support block; 45. a self-locking nut; 5. a seal ring; 6. an inflation valve; 7. a gas valve stem; 8. a protective cap; 9. and (5) plugging.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 5, in the existing energy accumulator, an air bag 2 is arranged in a cavity of an energy accumulator body 1, an inflation valve 6 communicated with the air bag 2 is arranged at one end of the energy accumulator body 1, a mushroom valve 4 such as a mushroom valve is arranged at the other end of the energy accumulator body 1, during operation, air is filled in the air bag 2, along with the increase of oil inlet pressure, oil is filled in a gap between the air bag 2 and the energy accumulator body 1, the air bag 2 undergoes compression deformation, the stored oil is more and more, when the pressure of the oil port is reduced, the air in the air bag 2 expands, the oil in the energy accumulator body 1 is discharged, and the mushroom valve is extruded.

An accumulator and a construction machine provided in an embodiment of the present utility model are described below with reference to fig. 1 to 4.

The present embodiment provides an accumulator, including: the energy accumulator body 1, the mushroom valve 4, the inflation valve 6, the air bag 2 and the supporting piece 3.

Wherein, a cavity is arranged in the accumulator body 1, a fungus valve 4 is arranged at the first end of the accumulator body 1, and an inflation valve 6 is arranged at the second end of the accumulator body 1; the air bag 2 is arranged in the cavity, and the air bag 2 is communicated with the inflation valve 6 and is used for inflating air into the air bag 2 through the inflation valve 6; thus, the accumulator body 1 of the accumulator is divided into two chambers, a gas chamber and a liquid chamber, the gas chamber is provided in the air bag 2, the liquid chamber is provided outside the air bag 2, the liquid chamber is provided to allow oil to flow out and in, and the gas in the air bag 2 is compressed or expanded according to the operating hydraulic pressure.

The bearing piece 3 is arranged in the cavity, the bearing piece 3 is connected with the mushroom valve 4, one end of the bearing piece 3 corresponding to the air bag 2 is provided with a bearing surface for bearing the air bag 2, and the area of the bearing surface is larger than that of the supporting surface of the mushroom valve 4.

Compared with the prior art, the utility model has the advantages that the bearing piece 3 is arranged between the mushroom valve 4 and the air bag 2, and when the air bag 2 acts on the bearing piece 3 in the expansion process, the bearing surface area of the bearing piece 3 is larger than the area of the supporting surface of the mushroom valve 4, so that the contact area of the air bag 2 is increased, the buffering effect is improved, and meanwhile, the deformation degree of the contact surface of the air bag 2 is reduced, so that the air bag 2 cannot excessively contact with the mushroom valve 4, and the damage of the air bag 2 is avoided.

In the energy storage stage of the energy storage device, oil flows into the cavity of the energy storage device body 1 through the mushroom valve 4 to compress the air bag 2, the air bag 2 is compressed, the air pressure in the air bag 2 is increased, and the pressure of hydraulic oil is increased along with the increase until the hydraulic oil is charged to a set pressure; in the energy release stage, the air bag 2 is inflated and expanded to squeeze oil in the energy accumulator body 1, and the oil flows out of the energy accumulator through the fungus valve; at the same time, the balloon 2 acts on the mushroom valve 4 by pressing the support 3, causing the support 3 and the stem 41 of the mushroom valve 4 to move as the balloon 2 expands until the mushroom valve 4 closes.

Preferably, the air bag 2 is filled with an inert gas such as nitrogen, and has no oxidation or reduction property due to the stability of nitrogen, does not cause oxidation/reduction denaturation of hydraulic oil, and can maintain the property of hydraulic oil.

When the hydraulic accumulator is filled with hydraulic oil, the pressure of the hydraulic oil is equal to the pressure of the nitrogen, the air bag 2 is compressed along with the flushing of the hydraulic oil, the air pressure in the air bag 2 is increased, the pressure of the hydraulic oil is increased along with the pressure increase until the hydraulic oil is charged to the set pressure, and the energy storage is completed.

The support 3 may be a circular plate, a bowl-like structure or other supporting structure, which is only used for illustration and is not intended to limit the scope of protection.

In one embodiment, the bearing surface of the bearing member 3 is a concave arc surface. So set up, at the energy storage ware in-process of releasing, gasbag 2 inflation extrusion bearing piece 3, the indent circular surface of bearing piece 3 can laminate more with the surface of gasbag 2, when increasing area of contact, prevent gasbag 2 to diffusion all around and the contact of fungus shape valve 4, avoid fungus shape valve 4 to contact gasbag 2 and cause it to damage.

In one embodiment, the bearing surface of the bearing 3 is planar. So set up, at the energy storage ware in-process of releasing energy, gasbag 2 inflation extrusion bearing piece 3, through bearing piece 3 increase area of contact, prevent gasbag 2 to diffusion all around and the contact of fungus shape valve 4, avoid fungus shape valve 4 to contact gasbag 2 and cause it to damage.

In this embodiment, the accumulator body 1 is cylindrical with two ends necked down, and the diameter of the support member 3 is smaller than that of the cavity, so that the movement of the support member 3 in the axial direction in the accumulator body 1 is not affected. Based on this, the bearing surface of the bearing member 3 is preferably an arc surface with concave shape, and when the maximum outer circle diameter of the bearing member 3 is the same as the diameter of the plane, the arc surface with concave shape can have more contact area with the air bag 2, so as to provide better buffering effect.

In this embodiment, the thickness of the end of the bearing surface near the bearing surface is greater than the thickness of the portion of the airbag 2 that is used to contact the inner wall of the cavity.

So set up, improve the weak part of gasbag 2, when gasbag 2 promotes the supporting piece 3 course of moving together, through the thickness that increases the gasbag 2 is used for the one end that contacts with supporting piece 3, make its deformation degree reduce, reduce impaired possibility to improve the cushioning effect.

In this embodiment, the mushroom valve 4 is a mushroom valve, including a valve rod 41 and a valve body 42, the valve body 42 is mounted at a port of the second end of the accumulator body 1, the valve rod 41 is movably disposed in the valve body 42 along an axial direction, a support block 44 is disposed at one end of the valve rod 41 corresponding to the air bag 2, the support block 44 is disposed in the cavity, the support block 44 is connected with the support 3, a spring 43 is sleeved on the valve rod 41 between the support block 44 and the valve body 42, and an outer diameter of the support block 44 is larger than an inner diameter of a liquid port in the valve body 42, so that when the mushroom valve 4 is closed, the support block 44 can close the liquid port, and when the mushroom valve 4 is opened, the support block 44 is lifted away from the liquid port to enable liquid to enter the accumulator body 1. When the energy accumulator is discharged under the action of the spring 43 in a normally open state, the air bag 2 fully expands to press the valve rod 41, the fungus valve is closed, and the oil discharge stage is finished.

In some specific embodiments, a sealing ring 5 is arranged at a port of the second end of the accumulator body 1, the surface of the sealing ring 5 is fixedly connected with the port of the accumulator body 1, a valve body 42 is connected with the accumulator body 1 through the sealing ring 5, a part of the valve body 42 penetrating through the accumulator body 1 is positioned in the accumulator body 1, a supporting block 44 is arranged at one end of the valve rod 41 positioned in the accumulator body 1, the cross-sectional area of the supporting block 44 is larger than that of the valve rod 41, the other end of the valve rod 41 penetrates through the valve body 42 and extends to the inside of the valve body 42, a spring 43 is sleeved on the valve rod 41 between the supporting block 44 and the valve body 42, a check ring is fixedly connected with the part of the valve rod 41 positioned in the valve body 42 in sequence, the check ring is used for preventing the valve rod 41 from being separated from the valve body 42, a self-locking nut 45 is in threaded connection with the surface of the valve rod 41, the self-locking nut 45 is contacted with the check ring and is used for fixing the check ring, and the self-locking nut 45 is mainly used for locking by friction force.

In some embodiments, the air valve rod 7 is fixedly connected to the inside of the air bag 2, one end of the air valve rod 7 is communicated with the inside of the air bag 2, the other end of the air valve rod 7 is located outside the accumulator body 1 and is in threaded connection with the air charging valve 6, and a nut is in threaded connection with the surface of the air valve rod 7, so that the air valve rod 7 and the accumulator body 1 are locked and fixed.

In the embodiment of the utility model, the outer end surface of the air valve rod 7 is provided with the protective cap 8, the protective cap 8 can be in threaded connection with the surface of the air valve rod 7, the air valve 6 is covered by the protective cap 8, and the surfaces of the air valve 6 and the air valve rod 7 can be protected through the arrangement of the protective cap 8.

In the embodiment of the utility model, a screwed plug threaded hole is formed in one side of the valve body 42, which is positioned outside the accumulator body 1, and is in threaded connection with a screwed plug 9, and the screwed plug 9 is used for preventing leakage of a pipeline and has a sealing effect.

In some embodiments, the side wall of the supporting block 44 at the end of the valve rod 41 is obliquely provided with a buffering slope, so that the buffering slope plays a role in diversion and buffering during oil feeding.

The embodiment of the utility model also provides engineering machinery, such as a vehicle-mounted concrete pump, wherein the energy accumulator is arranged in a hydraulic system of the engineering machinery.

By providing the support 3 on the valve stem 41 of the mushroom valve 4, when the liquid (e.g., hydraulic oil) in the hydraulic system is pressed into the liquid chamber of the accumulator, the valve stem 41 is lifted upward by the increasing hydraulic pressure at the liquid port and the elastic force of the spring 43 reset to open the liquid port, so that the liquid flows into the liquid chamber; as the liquid in the liquid chamber increases gradually, the gas in the balloon 2 is compressed, thereby achieving pressurization and energy storage. When the accumulator is required to convey liquid to the hydraulic system, the air bag 2 is inflated to enable the pressure in the air bag 2 to be larger than the pressure at the liquid port, so that the liquid in the liquid chamber is gradually discharged to the hydraulic system through the liquid port, in the process, along with the fact that the pressure of the air bag 2 is larger and larger, the air bag 2 can contact with the bearing member 3 to press the bearing member 3, the hydraulic oil in the liquid chamber is completely emptied, meanwhile, the pressure of the air in the air bag 2 is gradually increased to be larger than the elastic force of the spring 43, the spring 43 is compressed, the bearing member 3 moves together with the valve rod 41, and accordingly the supporting block 44 of the valve rod 41 closes the liquid port, and energy supply to the hydraulic system is achieved. Because the bearing surface area of the bearing piece 3 is larger than the end surface area of the supporting block 44, the contact area of the air bag 2 is increased, meanwhile, the buffer effect is improved, the deformation degree of the contact surface of the air bag 2 is reduced by increasing the thickness of the contact part of the air bag 2 and the bearing piece 3, the air bag 2 cannot excessively contact with the mushroom valve 4, and cannot diffuse around and be clamped between the valve rod 41 and the valve body 42, so that the damage of the air bag 2 is avoided, the service life of the air bag 2 is prolonged, and the cost is saved.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "manner," "particular modes," or "some modes," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or mode is included in at least one embodiment or mode of the embodiments of the present utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or manner. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or ways. Furthermore, various embodiments or modes and features of various embodiments or modes described in this specification can be combined and combined by those skilled in the art without mutual conflict.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An accumulator, comprising:

the energy accumulator comprises an energy accumulator body (1), wherein a cavity is formed in the energy accumulator body (1), a fungus-shaped valve (4) is arranged at the first end of the energy accumulator body (1), and an inflation valve (6) is arranged at the second end of the energy accumulator body (1);

an air bag (2) arranged in the cavity, wherein the air bag (2) is communicated with the inflation valve (6);

the bearing piece (3) is arranged in the cavity, the bearing piece (3) is connected with the mushroom valve (4), and a bearing surface is arranged at one end of the bearing piece (3) corresponding to the air bag (2) and used for bearing the air bag (2), and the area of the bearing surface is larger than that of the supporting surface of the mushroom valve (4).

2. The accumulator according to claim 1, characterized in that the bearing surface of the bearing (3) is a concave arc surface.

3. The accumulator according to claim 1, characterized in that the bearing surface of the bearing (3) is planar.

4. An accumulator according to any one of claims 1-3, characterized in that the thickness of the balloon (2) near the end of the bearing surface is greater than the thickness of the balloon (2) for the contact portion with the inner wall of the cavity.

5. The accumulator according to claim 1, characterized in that the diameter of the support (3) is smaller than the diameter of the cavity.

6. The accumulator according to claim 5, characterized in that the mushroom valve (4) comprises a valve rod (41) and a valve body (42), the valve body (42) is mounted at a port of the second end of the accumulator body (1), the valve rod (41) is axially movably arranged in the valve body (42), the valve rod (41) is sleeved with a spring (43), and one end of the valve rod (41) corresponding to the air bag (2) is connected with the bearing piece (3).

7. The accumulator according to claim 6, characterized in that the port of the second end of the accumulator body (1) is provided with a sealing ring (5), the valve body (42) being connected to the accumulator body (1) by means of the sealing ring (5).

8. Accumulator according to claim 5, characterized in that the charging valve (6) is externally provided with a protective cap (8).

9. The accumulator according to claim 6, characterized in that the support (3) is fixedly connected to the valve stem (41).

10. A working machine, characterized by comprising a hydraulic system provided with an accumulator according to any one of claims 1-9.