CN216812361U

CN216812361U - Hydraulic actuator oil cylinder

Info

Publication number: CN216812361U
Application number: CN202220643002.2U
Authority: CN
Inventors: 邱永宁; 廖为; 杜闯; 宋涛; 叶菁
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-06-24
Anticipated expiration: 2032-03-23

Abstract

The utility model relates to the technical field of oil cylinders, in particular to a hydraulic actuator oil cylinder, which comprises: the cylinder, the piston rod, end cover and uide bushing, the coaxial setting of piston rod is in the cylinder, the piston sets firmly the one end at the piston rod, the one end of establishing the piston suit is the rear end, the fixed rear end that sets up at the cylinder of end cover, the uide bushing sets firmly the front end at the cylinder, wear out in the uide bushing is followed to the front end of piston rod, the preceding terminal surface of end cover, form no pole low-pressure chamber between the rear end face of piston and the inner wall of cylinder, the preceding terminal surface of piston, form the pole high-pressure chamber between the rear end face of uide bushing and the cylinder, no pole low-pressure chamber all is equipped with the inlet port with having on the pole high-pressure chamber, the cover is equipped with 0 type sealing washer on the piston, in order to prevent to have pole high-pressure chamber fluid to leak to no pole low-pressure chamber. The oil cylinder is designed aiming at the project of a national astronomical table telescope (FAST) with the caliber of 500 meters, meets the requirements of sealing performance, convenient carrying, simple disassembly, convenient operation of an exhaust structure and good use effect.

Description

Hydraulic actuator oil cylinder

Technical Field

The utility model relates to the technical field of oil cylinders, in particular to a hydraulic actuator oil cylinder.

Background

At present, an actuator oil cylinder used in a national astronomical table 500-meter caliber telescope (FAST) project is of a common oil cylinder structure, and the following problems occur in the use process due to no deep research aiming at special working conditions of the FAST project:

1. the oil in the rod high-pressure cavity of the actuator leaks to the rodless low-pressure cavity, so that the displacement is not accurately measured; 2. the actuator has a complex overall structure and heavy overall mass, and cannot be manually carried; 3. when the existing actuator is used for exhausting air in a rodless cavity, a rod head of an actuator oil cylinder needs to be detached, and the existing actuator is difficult to exhaust and wastes time and labor; 4. electromagnetic waves generated by the sensor overflow the sensor cabin to interfere the normal signal reception of the telescope.

Therefore, a cylinder suitable for FAST project is needed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the oil cylinder used in the FAST project in the prior art is of a common oil cylinder structure, and the technical problem of adaptability occurs in the actual use process is solved. The utility model provides a hydraulic actuator oil cylinder, which optimizes the integral structure of the oil cylinder, can effectively avoid oil leakage, is convenient to exhaust and carry, and is simple to assemble.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a hydraulic actuator cylinder, comprising:

the piston rod is coaxially arranged in the cylinder barrel, the piston is fixedly sleeved at one end of the piston rod, the end, sleeved with the piston, of the piston is the rear end, the end cover is fixedly arranged at the rear end of the cylinder barrel, the guide sleeve is fixedly arranged at the front end of the cylinder barrel, the front end of the piston rod penetrates out of the guide sleeve, a rodless low-pressure cavity is formed among the front end face of the end cover, the rear end face of the piston and the inner wall of the cylinder barrel, a rod high-pressure cavity is formed among the front end face of the piston, the rear end face of the guide sleeve and the cylinder barrel, oil inlet holes are formed in the rodless low-pressure cavity and the rod high-pressure cavity, and a 0-type sealing ring is sleeved on the piston to prevent the leakage of oil in the rodless low-pressure cavity.

Furthermore, in order to prevent the guide sleeve from being corroded, an electroplated layer is arranged on the inner wall of the guide sleeve, a waterproof dustproof ring is arranged between the guide sleeve and the piston rod, and the waterproof dustproof ring is fixedly connected with the guide sleeve. Through having improved the anterior seal structure of hydro-cylinder, increase waterproof dustproof circle between uide bushing and piston rod, the uide bushing hole increases the plating layer, can prevent effectively that the uide bushing from corroding, increases the corrosion resisting capability of uide bushing, prevents effectively that the outer leakage from appearing in the hydro-cylinder.

Further, the hydraulic actuator cylinder further includes:

the sensor cabin is fixedly arranged at the front end of the end cover;

displacement sensor, displacement sensor includes interconnect's sensor body and sensor guide arm, the sensor body sets up in the sensor cabin, insert the piston rod after running through end cover, no pole low-pressure chamber and piston in proper order of sensor guide arm, the sensor guide arm with form exhaust passage between the piston rod inner wall, the front end of piston rod is provided with discharge valve, exhaust passage's one end intercommunication no pole low-pressure chamber, exhaust passage's the other end intercommunication discharge valve.

The actuator oil cylinder can perform exhaust operation without disassembling the rod head by forming an exhaust channel between the sensor guide rod and the inner wall of the piston rod, thereby simplifying the exhaust operation.

Furthermore, a low-resistance sealing ring is arranged on a step matched with the rear end of the end cover and the sensor cabin, the volume resistance of the low-resistance sealing ring is less than 0.1 omega.cm, and the low-resistance sealing ring is arranged at the rear end of the end cover, namely at one end close to the sensor cabin, so that external rainwater can be prevented from entering the sensor cabin to corrode an internal structure, and electromagnetic waves generated by the sensor can be shielded from overflowing the sensor cabin to interfere normal signal receiving of the telescope.

Furthermore, a connecting seat is fixedly arranged on the cylinder barrel and is made of aluminum alloy.

Further, the end cover and the sensor cabin are fixedly connected through flange screws.

Through improving the overall structure of cylinder body, use the material aluminum alloy of lightness, alleviateed hydro-cylinder weight, optimized the connected mode between end cover and the cylinder for the whole quality of hydro-cylinder reduces, the manual handling of being convenient for.

Further, the uide bushing includes the uide bushing body, the uide bushing body is fitted with a contraceptive ring and is equipped with the boss, the rear end face of boss with the preceding terminal surface of cylinder leans on.

Further, in order to facilitate connection, the rear end of the sensor cabin is connected with a cylinder bottom ear ring, and the front end of the piston rod is connected with a rod head ear ring.

Compared with the original actuator oil cylinder, the hydraulic actuator oil cylinder has the following advantages:

1. through set up seal structure on the piston, effectively avoid having the fluid of pole high-pressure intracavity to leak to no pole low pressure intracavity, set up seal structure between uide bushing and piston rod, and establish the plating layer in the uide bushing, effectively avoid having the fluid of pole high-pressure intracavity to leak outside the hydro-cylinder.

2. The overall structure of the actuator is optimized, the weight of the oil cylinder is reduced, the weight of the actuator is kept in a range capable of being manually carried, and the actuator is convenient to install and maintain.

3. The convenient and reliable exhaust structure can completely exhaust the rodless low-pressure cavity of the oil cylinder without disassembling the rod head, thereby facilitating the exhaust operation when the actuator is installed.

4. Compared with the original structure, the sensor cabin sealing structure of the actuator oil cylinder can effectively prevent electromagnetic signals from leaking.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the external configuration of a hydraulic actuator cylinder of the present invention;

FIG. 2 is a schematic cross-sectional view of the interior of the hydraulic actuator cylinder of the present invention;

FIG. 3 is an enlarged view at A of FIG. 2;

fig. 4 is an enlarged view of fig. 2 at B.

Reference numerals:

1. a cylinder barrel; 11. a rodless low pressure chamber; 12. a high pressure cavity with a rod; 13. an oil inlet hole; 14. a flange screw; 2. a piston; 21. a type 0 seal ring; 3. a piston rod; 4. an end cap; 41. a low resistance seal ring; 5. a guide sleeve; 51. a waterproof dustproof ring; 52. a boss; 6. a sensor pod; 61. a sensor body; 62. a sensor guide; 63. an exhaust passage; 64. an exhaust valve; 7. a connecting seat; 8. a cylinder bottom ear ring; 9. the ear ring of the club head.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1 to 4, which are preferred embodiments of the present invention, a hydraulic actuator cylinder includes: cylinder 1, piston 2, piston rod 3, end cover 4 and uide bushing 5.

The coaxial setting of piston rod 3 is in cylinder 1, the fixed suit of piston 2 is in the one end of piston rod 3, the one end of establishing the 2 suits of piston is the rear end, end cover 4 is fixed to be set up the rear end at cylinder 1, end cover 4 adopts welded connection with cylinder 1, uide bushing 5 sets firmly the front end at cylinder 1, the front end of piston rod 3 is worn out in uide bushing 5, the preceding terminal surface of end cover 4, form no pole low-pressure chamber 11 between the rear end face of piston 2 and the inner wall of cylinder 1, the preceding terminal surface of piston 2, be formed with pole high-pressure chamber 12 between the rear end face of uide bushing 5 and the cylinder 1, no pole low-pressure chamber 11 all is equipped with inlet port 13 with pole high-pressure chamber 12, the cover is equipped with 0 type sealing washer 21 on the piston 2, in order to prevent that there is pole high-pressure chamber 12 fluid to leak to no pole low-pressure chamber 11.

As shown in fig. 4, an electroplated layer is arranged on the inner wall of the guide sleeve 5, a waterproof dustproof ring 51 is arranged between the guide sleeve 5 and the piston rod 3, the waterproof dustproof ring 51 is fixedly connected with the guide sleeve 5, the guide sleeve 5 comprises a guide sleeve body, a boss 52 is annularly arranged on the guide sleeve body, and the rear end face of the boss 52 abuts against the front end face of the cylinder barrel 1.

Hydraulic actuator hydro-cylinder still includes:

the sensor cabin 6 is fixedly arranged at the front end of the end cover 4;

displacement sensor, displacement sensor includes interconnect's sensor body 61 and sensor guide arm 62, sensor body 61 sets up in sensor cabin 6, sensor guide arm 62 run through end cover 4 in proper order, insert in piston rod 3 behind rodless low-pressure chamber 11 and the piston 2, form exhaust passage 63 between sensor guide arm 62 and the 3 inner walls of piston rod, the front end of piston rod 3 is provided with discharge valve 64, the one end intercommunication rodless low-pressure chamber 11 of exhaust passage 63, the other end intercommunication discharge valve 64 of discharge passage 63.

A low-resistance sealing ring 41 is arranged on a step matched with the sensor cabin 6 at the rear end of the end cover 4, and the volume resistance of the low-resistance sealing ring 41 is less than 0.1 omega.

The connecting seat 7 is fixedly arranged on the cylinder barrel 1, the connecting seat 7 is made of aluminum alloy, and the end cover 4 and the sensor cabin 6 are fixedly connected through a flange screw 14.

The rear end of the sensor cabin 6 is connected with a cylinder bottom ear ring 8, and the front end of the piston rod 3 is connected with a rod head ear ring 9.

According to the utility model, the sealing structure is arranged on the piston 2, so that the oil in the rod high-pressure cavity 12 is effectively prevented from leaking into the rodless low-pressure cavity 11, the sealing structure is arranged between the guide sleeve 5 and the piston rod 3, and the electroplated layer is arranged in the guide sleeve 5, so that the oil in the rod high-pressure cavity 12 is effectively prevented from leaking out of the oil cylinder.

According to the utility model, the exhaust channel 63 is formed between the sensor guide rod 62 and the inner wall of the piston rod 3, the piston 2 moves towards the rodless low-pressure cavity 11 in the first exhaust mode, air in the rodless low-pressure cavity 11 is extruded by the piston 2 and is exhausted to the outside of the oil cylinder through the exhaust valve 64 along the exhaust channel 63, and in the second exhaust mode, oil is fed into the rodless low-pressure cavity 11, so that gas in the rodless low-pressure cavity 11 is exhausted to the outside of the oil cylinder through the exhaust valve 64 along the exhaust channel 63, and the gas is exhausted simply and conveniently without disassembling the end part of the piston rod 3.

The utility model optimizes the integral structure of the actuator, reduces the weight of the oil cylinder, keeps the weight of the actuator in a range of manual carrying and is convenient for the installation and maintenance of the actuator.

Compared with the original structure, the sealing structure of the sensor cabin 6 can effectively prevent electromagnetic signals from leaking.

In summary, the hydraulic actuator cylinder disclosed by the utility model is designed for a national astronomical telescope (FAST) project with a caliber of 500 meters, the overall structure of the cylinder is optimized, oil leakage can be effectively avoided, the exhaust and the carrying are convenient, the assembly is simple, and the using effect is good.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A hydraulic actuator cylinder, comprising:

the cylinder barrel (1), the piston (2), the piston rod (3), the end cover (4) and the guide sleeve (5), wherein the piston rod (3) is coaxially arranged in the cylinder barrel (1), the piston (2) is fixedly sleeved at one end of the piston rod (3), the sleeved end of the piston (2) is arranged as the rear end, the end cover (4) is fixedly arranged at the rear end of the cylinder barrel (1), the guide sleeve (5) is fixedly arranged at the front end of the cylinder barrel (1), the front end of the piston rod (3) penetrates out of the guide sleeve (5), a rodless low-pressure cavity (11) is formed between the front end face of the end cover (4), the rear end face of the piston (2) and the inner wall of the cylinder barrel (1), a rodless high-pressure cavity (12) is formed between the front end face of the piston (2), the rear end face of the guide sleeve (5) and the cylinder barrel (1), oil inlet holes (13) are formed in the rodless low-pressure cavity (11) and the rodless high-pressure cavity (12), the utility model discloses a piston, including piston (2), piston rod (5) and piston rod (3), the cover is equipped with 0 type sealing washer (21) on piston (2) to prevent that there is pole high-pressure chamber (12) fluid to no pole low-pressure chamber (11) to leak, be equipped with the plating layer on the inner wall of uide bushing (5), uide bushing (5) with be equipped with waterproof dust ring (51) between piston rod (3), waterproof dust ring (51) with uide bushing (5) fixed connection.

2. The hydraulic actuator cylinder of claim 1, further comprising:

the sensor cabin (6), the said sensor cabin (6) is fixed to set up in the front end of the said end cap (4);

displacement sensor, displacement sensor includes interconnect's sensor body (61) and sensor guide arm (62), sensor body (61) set up in sensor cabin (6), insert in piston rod (3) behind end cover (4), no pole low-pressure chamber (11) and piston (2) of running through in proper order of sensor guide arm (62), sensor guide arm (62) with form exhaust passage (63) between piston rod (3) the inner wall, the front end of piston rod (3) is provided with discharge valve (64), the one end intercommunication no pole low-pressure chamber (11) of exhaust passage (63), the other end intercommunication discharge valve (64) of exhaust passage (63).

3. The hydraulic actuator cylinder according to claim 2, wherein a low-resistance seal ring (41) is provided on a step where the rear end of the end cover (4) and the sensor chamber (6) are engaged, and the volume resistance of the low-resistance seal ring (41) is less than 0.1 Ω.

4. The hydraulic actuator cylinder according to claim 3, wherein the cylinder barrel (1) is fixedly provided with a connecting seat (7), and the connecting seat (7) is made of an aluminum alloy material.

5. A hydraulic actuator cylinder according to claim 4, characterized in that the end cover (4) and the sensor chamber (6) are fixedly connected by means of flange screws (14).

6. A hydraulic actuator cylinder according to claim 5, characterized in that the guide sleeve (5) comprises a guide sleeve body, a boss (52) is annularly arranged on the guide sleeve body, and the rear end face of the boss (52) abuts against the front end face of the cylinder barrel (1).

7. The hydraulic actuator cylinder according to claim 6, wherein a cylinder bottom lug (8) is connected to a rear end of the sensor chamber (6), and a head lug (9) is connected to a front end of the piston rod (3).