CN214331024U

CN214331024U - Piston type energy accumulator

Info

Publication number: CN214331024U
Application number: CN202120038681.6U
Authority: CN
Inventors: 江志杰
Original assignee: Zhejiang Aolaier Hydraulic Co ltd
Current assignee: Zhejiang Aolaier Hydraulic Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-10-01
Anticipated expiration: 2031-01-07

Abstract

The application relates to a piston accumulator relates to hydraulic pressure auxiliary component's technical field, and it includes the cylinder body and locates the hydraulic fluid port end cover of cylinder body bottom, and the hydraulic fluid port end cover is equipped with the fluid connection mouth along the axle center direction, is equipped with a filter screen in the fluid connection mouth. When hydraulic system external pressure is higher than the pressure in the piston accumulator, fluid can get into inside the piston accumulator through the fluid connector, and the impurity smugglied secretly in the fluid can effectively be filtered in setting up of fluid connector filter screen, reduces impurity and gets into the interior contaminated fluid of accumulator and the possibility of damaging the piston.

Description

Piston type energy accumulator

Technical Field

The application relates to the technical field of hydraulic auxiliary elements, in particular to a piston type energy accumulator.

Background

The accumulator is an energy storage device used in hydraulic starting system, which can convert the energy in the system into compression energy or potential energy at proper time for storage, and when the system needs, the compression energy or potential energy is converted into hydraulic or pneumatic energy for release, and the hydraulic or pneumatic energy is supplied to the system again. When the system pressure is increased instantaneously, it can absorb the energy of the part to ensure the pressure of the whole system is normal. Piston accumulators are one type of accumulators. The piston type energy accumulator separates gas and liquid by a piston, and a seal is arranged between the piston and the inner wall of the cylindrical energy accumulator, so that oil is not easy to oxidize. The energy accumulator has long service life, light weight, easy installation, simple structure and convenient maintenance.

The utility model discloses a utility model patent that present grant bulletin number is CN203835821U discloses a piston accumulator, including cylinder body, piston, gas port end cover and hydraulic fluid port end cover, inlay between piston and the cylinder body and be equipped with first sealing washer and second sealing washer, the cooperation forms the air cavity between piston, cylinder body and the gas port end cover, and the cooperation forms the oil pocket between piston, cylinder body and the hydraulic fluid port end cover, installs the inflation valve with the air cavity intercommunication on the gas port end cover, and the oil pocket is linked together through hydraulic fluid port end cover and hydraulic pressure pipeline, be provided with the oil groove along circumference on the piston.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: along with the change of pressure in the hydraulic pipeline, the oil in the oil cavity can repeatedly flow into and flow out of the oil cavity through the oil connecting port on the oil port end cover. And fluid can smuggle some impurity secretly at the flow in-process, and impurity can get into the oil pocket and constantly accumulate in the oil pocket along with fluid, hinders the motion of piston, reduces piston accumulator's sensitivity and even causes piston accumulator's damage.

SUMMERY OF THE UTILITY MODEL

In order to effectively reduce impurity entering piston accumulator, protection piston normal operating, this application provides a piston accumulator.

The application provides a piston accumulator adopts following technical scheme:

the utility model provides a piston accumulator, includes the cylinder body and locates the hydraulic fluid port end cover of cylinder body bottom, the hydraulic fluid port end cover is equipped with the fluid connection mouth along the axle center direction, be equipped with a filter screen in the fluid connection mouth.

Through adopting above-mentioned technical scheme, when hydraulic circuit's pressure is greater than the pressure of the inside compressed air of piston accumulator, fluid passes through the fluid connector and gets into the oil chamber from the accumulator outside. The filter screen is arranged to be favorable to reducing impurity and getting into the oil chamber along with fluid, reduces the piston because the existence of impurity movement obstructed probably for the piston is difficult impaired, increases piston accumulator's life.

Optionally, the oil connection port is provided with a caulking groove coaxial with the oil connection port on the outer side of the cylinder body, and the filter screen is fixed in the caulking groove.

Through adopting above-mentioned technical scheme, the filter screen imbeds completely in the fluid connection mouth, compares with the filter screen is outstanding on hydraulic fluid port end cover surface, and embedded installation makes piston energy accumulator dismantle the in-process, and the filter screen is difficult to receive the wearing and tearing that collide with, can keep the good filter effect of filter screen.

Optionally, the caulking groove is connected with the filter screen through a bolt.

Through adopting above-mentioned technical scheme, the filter screen adopts bolted connection with the caulking groove, has realized dismantling of filter screen. When excessive impurities are adhered to the filter screen or the filter screen is damaged, the bolt can be removed and then the filter screen can be cleaned or replaced.

Optionally, a positioning hole is formed in the edge of the filter screen, and a positioning pin matched with the positioning hole is arranged in the embedding groove.

Through adopting above-mentioned technical scheme, in order to match the position of the screw hole between filter screen and the caulking groove, insert the locating pin behind the locating hole, the screw hole on filter screen and the caulking groove will aim at, has made things convenient for the installation of follow-up bolt, has saved installation time.

Optionally, a sealing ring is arranged between the filter screen and the caulking groove.

Through adopting above-mentioned technical scheme, the setting of sealing ring can reduce the fluid of smuggleing impurity secretly and not filter, gets into the oil pocket from the junction of filter screen and caulking groove in, reduces the possibility that impurity got into the oil pocket.

Optionally, a sliding groove is formed in one side, away from the interior of the cylinder body, of the oil port end cover, and a protective cover capable of completely covering the filter screen is arranged in the sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, when piston accumulator is dismantling the in-process that gets off or transport, the visor can protect on the one hand the filter screen not to be damaged, and on the other hand closes the fluid connector for under the condition that piston accumulator is not using, impurity in the environment can not get into the oil intracavity.

Optionally, a shifting block is arranged on the end face, away from the inner cavity of the cylinder body, of the protective cover.

Through adopting above-mentioned technical scheme, setting up of shifting block makes the more laborsaving convenience of sliding of visor.

Optionally, a spring plunger is arranged at the bottom of the sliding groove, and when the protective cover completely covers the filter screen, the spring plunger abuts against the protective cover.

Through adopting above-mentioned technical scheme, when piston accumulator normal operating, spring plunger can be pressed in the hydraulic fluid port end cover by the visor. When the protective cover is required to play a protection role, the protective cover slides along the direction close to the filter screen, when the protective cover slides to the end of the sliding chute, the protective cover is separated from the spring plunger, and the spring plunger is popped out from the oil port end cover so that the plug head of the spring plunger is abutted against the protective cover. In the process of disassembly and transportation, the spring plunger enables the position of the protective cover to be fixed, and the protective cover always covers the filter screen and cannot easily slide.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the filter screen effectively reduces the possibility that impurities enter the oil cylinder along with the oil to damage the piston;

2. the arrangement of the protective cover ensures that the filter disc can be effectively protected when the piston type energy accumulator is not used, and impurities in the environment can be kept out of the protective cover;

3. the spring plunger is arranged to fix the position of the protective cover, so that the protective cover cannot slide in the transportation process.

Drawings

FIG. 1 is a cross-sectional view of a piston accumulator of an embodiment of the present application;

FIG. 2 is a partial block diagram of a piston accumulator;

FIG. 3 is a partial end view of the piston accumulator;

FIG. 4 is an enlarged view at A of FIG. 1;

fig. 5 is a schematic structural diagram of the filter screen covered by the protective cover.

Description of reference numerals: 1. a cylinder body; 2. a piston; 3. an air cavity; 31. an air port end cap; 311 air valves; 4. an oil chamber; 41. an oil port end cover; 411. an oil liquid connector; 412. a filter screen; 4121. positioning holes; 413. caulking grooves; 4131. Positioning pins; 414. a chute; 415. a spring plunger; 5. a bolt; 6. a seal ring; 7. a protective cover; 71. and (5) shifting blocks.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses piston accumulator. As shown in fig. 1, the piston accumulator includes a cylinder 1, a piston 2 slidably movable in the cylinder 1, the piston 2 dividing the cylinder 1 into two cavities. One is an air cavity 3, an air port end cover 31 is arranged at the end part of the air cavity 3, and an air valve 311 is arranged on the end surface of the air port end cover 31 far away from the air cavity 3; the other is an oil chamber 4, an oil port end cover 41 is arranged at the end part of the oil chamber 4, and an oil connection port 411 which axially penetrates through the whole oil port end cover 41 is arranged in the oil port end cover 41.

As shown in fig. 2, an end surface of the port cover 41 away from the piston 2 is provided with a caulking groove 413, and the caulking groove 413 is located around the oil connection port 411 and is coaxial with the oil connection port 411. The caulking groove 413 bottom is equipped with two bolt holes, and two bolt holes are about fluid connector diameter symmetry. A filter screen 412 is fixed in the caulking groove 413, two bolt holes matched with the caulking groove 413 are arranged at the edge of the filter screen 412, and the filter screen 412 and the caulking groove 413 are fixed through bolts 5. The piston type energy accumulator realizes energy storage and energy release through the inlet and outlet of oil, the oil can carry part of impurities in the process of entering and exiting the oil cavity 4, and the impurities can block the movement of the piston 2 after entering the oil cavity 4 and even damage the piston 2. Impurities can be effectively filtered through the filter screen 412, the possibility that the impurities enter the oil cavity 4 is reduced, and the piston 2 is effectively protected. And the filter screen 412 is connected with the caulking groove 413 through a bolt 5, and can be replaced and cleaned. Meanwhile, the filter screen 412 is provided with a positioning hole 4121 staggered with the bolt hole, and a positioning pin 4131 matched with the positioning hole 4121 is arranged in the embedding groove 413. The filter screen 412 is quickly positioned and installed through the positioning pin 4131 and the positioning hole 4121, and installation time is saved. A sealing ring 6 is arranged between the filter screen 412 and the caulking groove 413. The sealing ring 6 reduces the possibility that oil enters from the joint of the filter screen 412 and the caulking groove 413 without passing through the filter screen 412, and enhances the filtering effect.

As shown in fig. 3, the thickness of the filter screen 412 is smaller than the depth of the caulking groove 413, a radial sliding groove 414 is formed in the end surface of the port end cover 41 away from the piston 2, a rectangular protective cover 7 is arranged in the sliding groove 414, and the area of the protective cover 7 is larger than that of the oil connection port 411. The protective cover 7 can completely cover the oil connection port 411 or be completely separated from the oil connection port 411 by sliding in the sliding groove 414. When the protective cover 7 slides to the side of the sliding groove 414 close to the oil connection port 411, the protective cover 7 completely covers the oil connection port 411. The end surface of the protective cover 7 far away from the piston 2 is provided with a shifting block 71.

When the piston accumulator is not used, the protective cover 7 is covered on the oil connection port 411, so that impurities in the environment can be effectively reduced from entering the cylinder body 1.

As shown in fig. 4 and 5, a spring plunger 415 is arranged in the port end cover 41 along the axial direction of the cylinder 1, and a plug of the spring plunger 415 extends out of the bottom of the sliding groove 414. When the protective cover 7 is located on the side of the sliding groove 414 close to the oil connection port 411, the plug of the spring plunger 415 is just abutted against the protective cover 7, so that the protective cover 7 can always cover the oil connection port during transportation. When the piston accumulator is required to be used, the protective cover 7 is separated from the oil connection port 411 by sliding the dial block 71. The implementation principle of the piston type energy accumulator in the embodiment of the application is as follows:

when the piston type energy accumulator is not used or the transportation process is carried out, the shifting block 71 is pulled to enable the protective cover 7 to slide in the sliding groove 414 until the protective cover 7 completely covers the oil connection port 411, and the spring plunger 415 is just abutted to one side of the protective cover 7 away from the filter screen 412.

When the piston accumulator is required to work in a hydraulic system, the spring plunger 415 is partially pressed into the oil port end cover 411, then the protective cover 7 can press the spring plunger 415 into the oil port end cover 41, and then the protective cover 7 covering the oil connection port 411 slides to the protective cover 7 through the shifting block 71 to be completely separated from the oil connection port 411.

When the pressure of the hydraulic system is lower than the pressure of the compressed air in the air cavity 3 in the piston accumulator, the oil in the oil cylinder flows to the external system from the oil connection port 411 under the action of the compressed air. When the pressure of the hydraulic system is higher than the pressure of compressed air in the air cavity 3 in the piston type energy accumulator, the piston 2 can move towards the cylinder direction due to pressure difference, and oil enters the oil cylinder through the oil connection port 411 to store energy. When oil flows into the oil cylinder from an external system, impurities carried in the oil are filtered out through the filtering action of the filter screen 412, so that the impurities cannot enter the oil cylinder to hinder the movement of the piston 2 or influence the piston type energy accumulator.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a piston accumulator, includes cylinder body (1) and locates hydraulic fluid port end cover (41) of cylinder body bottom, its characterized in that: the oil port end cover (41) is provided with an oil connection port (411) along the axis direction, and a filter screen (412) is arranged in the oil connection port (411).

2. The piston accumulator of claim 1, wherein: the oil liquid connecting port (411) is provided with an embedded groove (413) coaxial with the oil liquid connecting port (411) on the outer side of the cylinder body (1), and the filter screen (412) is fixed in the embedded groove (413).

3. A piston accumulator as claimed in claim 2, wherein: the caulking groove (413) is connected with the filter screen (412) through a bolt (5).

4. A piston accumulator as claimed in claim 2, wherein: the edge of the filter screen (412) is provided with a positioning hole (4121), and a positioning pin (4131) matched with the positioning hole (4121) is arranged in the embedding groove (413).

5. A piston accumulator as claimed in claim 2, wherein: and a sealing ring (6) is arranged between the filter screen (412) and the caulking groove (413).

6. A piston accumulator as claimed in claim 1, wherein: the oil port end cover (41) is provided with a sliding groove (414) on one side deviating from the interior of the cylinder body (1), and a protective cover (7) capable of completely covering the filter screen (412) is arranged in the sliding groove (414) in a sliding mode.

7. A piston accumulator as claimed in claim 6, wherein: and a shifting block (71) is arranged on the end face, far away from the inner cavity of the cylinder body (1), of the protective cover (7).

8. A piston accumulator as claimed in claim 7, wherein: the bottom of the sliding groove (414) is provided with a spring plunger (415), and when the protective cover (7) completely covers the filter screen (412), the spring plunger (415) is abutted against the edge of the protective cover (7).