CN216407346U - Self-adaptive sealing device of hydraulic cylinder - Google Patents
Self-adaptive sealing device of hydraulic cylinder Download PDFInfo
- Publication number
- CN216407346U CN216407346U CN202122645807.9U CN202122645807U CN216407346U CN 216407346 U CN216407346 U CN 216407346U CN 202122645807 U CN202122645807 U CN 202122645807U CN 216407346 U CN216407346 U CN 216407346U
- Authority
- CN
- China
- Prior art keywords
- end cover
- seal
- sealing
- piston
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model provides a self-adaptive sealing device of a hydraulic cylinder, wherein an upper end cover and a lower end cover are arranged at two ends of a cylinder body, a piston assembly is arranged in the cylinder body, a piston rod penetrates through the lower end cover and is connected with the lower end cover in a sliding and sealing manner, a sealing end cover is also arranged at one end of the lower end cover, a sealed cavity is formed between the lower end cover and the sealing end cover, a piston seal is arranged in the sealed cavity between the sealing end cover and the lower end cover, a combined seal is arranged between the piston seal and the lower end cover, the piston seal abuts against one end of the combined seal, and an adjusting device is also arranged and used for pushing the piston seal to extrude the combined seal so as to adjust the combined seal gap of the combined seal. The detection device controls the pressurizing device according to the measured conveying, and the adjusting device pushes the piston seal to move left to adjust the V-shaped combined seal gap.
Description
Technical Field
The utility model relates to the field of hydraulic sealing, in particular to a self-adaptive sealing device for a hydraulic cylinder.
Background
In engineering, a hydraulic cylinder is used as an actuator, a piston rod or a cylinder thereof reciprocates to transmit an acting force, and a V-type combined seal, a Y-type combined seal, a gray ring, an O-ring, or the like is generally used for sealing between moving members with hydraulic oil. However, due to the characteristics of the sealing structure of the sealing element, the wear-resisting property of materials, the admixture of impurities in hydraulic oil, the existence of working conditions such as offset load and the like, the wear of the dynamic sealing element of the hydraulic cylinder is aggravated, and a sealing gap is generated, so that the leakage of the hydraulic oil is caused.
At present, relevant researches are also made on the self-adaptive technology of the dynamic seal of the hydraulic cylinder, wherein firstly, pressure oil enters the bottom of a seal groove by utilizing a guide groove to play a role in extruding a seal piece and achieve the purpose of adjusting a seal gap, such as ' CN201310542667.X ' a self-sealing double-acting hydraulic cylinder '; secondly, a nested sealing structure is adopted, and pressure oil is introduced to deform the plastic sleeve to extrude a sealing element, so that the purpose of adjusting a sealing gap is realized, for example, CN201210398184.2 is a hydraulic cylinder piston self-adaptive sealing device; thirdly, an elastic damping ring is designed, and the tension degree is adjusted through oil pressure, so that the purpose of adjusting the gap of the sealing element is achieved.
In conclusion, the self-adaptive sealing technical scheme of the existing hydraulic cylinder has the following problems: firstly, the scheme of directly extruding a sealing element by utilizing pressure oil to adjust the gap is only suitable for special sealing such as U-shaped sealing, and the extrusion force of the sealing element is constant and cannot be adjusted, so that the kinetic friction force is overlarge; secondly, the scheme of adjusting the clearance is achieved by means of the compression deformation and extrusion of other parts, the compression deformation of a deformation part is complex, and the deformation is not suitable to be controlled, so that the extrusion of the sealing part is uneven, and the sealing effect is influenced.
Chinese patent 'CN 107605855A' is a V-shaped combined sealing structure in a plunger type oil cylinder, which comprises a plunger, a guide belt, a pressing ring and a cylinder opening guide sleeve; the structure also comprises a V-shaped cloth-clamping rubber combined sealing ring, and the guide belt is close to the lip surface and the back surface of the V-shaped cloth-clamping rubber combined sealing ring; a pressing ring is additionally arranged on the cylinder opening guide sleeve; and the clearance between the plunger and the cylinder opening guide sleeve is 1-2 mm. The scheme of adjusting the clearance is achieved by means of pressing, deforming and extruding the sealing element by other parts, the deformation of the deformed element is complex in pressing and deformation, and the deformation is not suitable to be controlled, so that the extrusion of the sealing element is uneven, and the sealing effect is influenced.
Chinese patent 'CN 211423068U' is a sealing protection structure for prolonging the service life of an oil cylinder, which comprises a piston rod, an oil cylinder cover and a combining cap, wherein the oil cylinder cover and the combining cap are sleeved on the piston rod; a stepped hole is formed in the oil cylinder cover, and a cap is embedded into the stepped hole and is in sliding fit with the stepped hole; the bottom surface of the step hole is provided with a plurality of threaded holes, and the cap is provided with through holes corresponding to the threaded holes. The scheme of adjusting the clearance is achieved by means of pressing, deforming and extruding the sealing element by other parts, the deformation of the deformed element is complex in pressing and deformation, and the deformation is not suitable to be controlled, so that the extrusion of the sealing element is uneven, and the sealing effect is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a self-adaptive sealing device of a hydraulic cylinder, and aims to provide a self-adaptive dynamic sealing device of the hydraulic cylinder, which can monitor sealing leakage in real time, automatically adjust the extrusion force of a sealing element and adjust a sealing gap.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides a pneumatic cylinder self-adaptation sealing device, cylinder body both ends are equipped with upper end cover and lower end cover, piston assembly establishes inside the cylinder body, the piston rod passes the lower end cover and is connected with lower end cover sliding seal, lower end cover one end still is equipped with the end cover, form airtight cavity between lower end cover and the end cover, be equipped with piston seal inside the airtight cavity between end cover and the lower end cover, be equipped with combined seal between piston seal and the lower end cover, piston seal supports and leans on combined seal one end, still be equipped with adjusting device, adjusting device is used for promoting piston seal extrusion combined seal, with the combined seal clearance of adjustment combined seal.
In a preferred scheme, the adjusting device is a self-adaptive adjusting device, and the structure is as follows: a cavity is arranged between the piston seal and the lower end cover, a pressurizing hole is arranged on the lower end cover, and the pressurizing device is communicated with the cavity through the pressurizing hole;
the pressurizing device pressurizes to enable the piston seal to extrude the combined seal so as to adjust the combined seal gap of the combined seal.
In the preferred scheme, the piston is sleeved inside the lower end cover in a sealing manner, the end part of the piston is provided with a boss, the end face of the boss abuts against the sealing end cover, the bottom surface of one side of the boss and the sealing end cover form a cavity IV, a pressurizing joint is arranged on a pressurizing hole of the lower end cover and is communicated with the cavity IV.
In the preferred scheme, adjusting device is screw rod adjusting device, and the structure is: the piston sealing device comprises an adjusting screw rod, wherein the adjusting screw rod penetrates through a sealing end cover to be in sealing connection with a piston, and the end part of the adjusting screw rod is abutted against the piston seal or in threaded connection with the piston seal;
and the adjusting screw rod is also provided with an adjusting nut, and the end face of the adjusting nut abuts against the sealing end cover to lock the adjusting screw rod.
In the preferred scheme, a first table top is arranged on the piston seal, a third cavity is formed by the first table top and a first boss surface inside the lower end cover, and a spring is arranged inside the third cavity.
In a preferable scheme, a second table top is further arranged on one side of the first table top, a first cavity is formed between the second table top and a second boss face in the lower end cover, the distance between the second table top and the diameter of the second boss face of the lower end cover is delta, and the delta is 0-4 mm.
In the preferred scheme, an oil hole is formed in the piston seal, an annular groove body is formed in the inner wall of the piston seal, a second cavity is formed by the groove body and the piston rod, the oil hole is communicated with the second cavity, a pressure measuring joint is arranged on the lower end cover, and the pressure measuring joint is communicated with the second cavity through the oil hole.
In the preferred scheme, the pressure measuring joint is electrically connected with the detection device, the detection device is electrically connected with the pressurizing device, and the pressurizing device is communicated with the pressurizing joint.
In the preferred scheme, the combined seal is a V-shaped combined seal, or a Y-shaped combined seal, or a Glae ring, or an O-shaped ring;
a plurality of groove bodies are arranged in the piston seal, and guide sleeves are arranged in the groove bodies;
a plurality of combined sealing grooves are formed in the inner part and the outer wall of the piston seal, and piston rod combined seals are arranged in the combined sealing grooves;
a first O-shaped sealing ring is arranged between the sealing end cover and the lower end cover;
a second O-shaped sealing ring is also arranged between the piston seal and the lower end cover, an O-shaped sealing groove is formed in the outer wall of the piston seal, and the second O-shaped sealing ring is arranged inside the O-shaped sealing groove.
The utility model provides a self-adaptive sealing device of a hydraulic cylinder, and compared with the prior art, the self-adaptive sealing device has the following advantages:
1. the concentric sealing piston is designed to uniformly extrude and adjust the V-shaped combined sealing gap, so that the phenomenon of nonuniform extrusion stress of the V-shaped combined sealing is effectively avoided, excessive friction damage of the V-shaped combined seal is reduced, and the service life of the V-shaped combined seal is prolonged.
2. The pressure measuring joint is arranged to monitor the hydraulic cylinder seal leakage on line, namely the V-shaped combined seal abrasion, the PLC control system gives an alarm for prompting, and controls the corresponding hydraulic system to feed oil from the pressure measuring joint to push the sealing piston to move left to adjust the V-shaped combined seal gap.
3. The damping spring is arranged in the accommodating cavity 3 and used for balancing the extrusion force of the V-shaped combined seal and the hydraulic thrust of the end face of the seal piston, so that the extrusion amount of the V-shaped combined seal is adjusted, the phenomenon that the hydraulic thrust of the end face of the seal piston is too large, the V-shaped combined seal is excessively extruded, and the abrasion of the V-shaped combined seal is aggravated is avoided.
4. The pressurizing connector is matched with the damping spring for use, and the axial compression amount of the V-shaped combined seal can be controlled in real time within the range of 0-delta of the seal adjusting gap.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a view of the piston seal configuration of the present invention;
FIG. 3 is a view showing the construction of the seal mounting position of the piston according to the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3A of the present invention;
FIG. 5 is a preferred block diagram of the adjusting screw of the present invention;
FIG. 6 is an enlarged, preferred, structural view of the adjusting screw of the present invention;
in the figure: an upper end cover 1; a cylinder body 2; a piston assembly 3; a piston rod 4; a lower end cap 5; a V-shaped combined seal 6; a pressure measuring joint 7; a spring 8; a pressure fitting 9; a piston seal 10; a seal end cap 11; an oil hole 12; an O-shaped seal groove 13; a piston rod combination seal 14; a guide sleeve 15; a detection device 16; a pressurizing device 17; a first cavity 18; a second cavity 19; a cavity III 20; a cavity four 21; a pressure tap 22; an adjusting screw 23; an adjusting nut 24; a first mesa 25; a second mesa 26.
Detailed Description
Example 1
As shown in fig. 1 to 6, an adaptive sealing device for a hydraulic cylinder, an upper end cover 1 and a lower end cover 5 are arranged at two ends of a cylinder body 2, a piston assembly 3 is arranged inside the cylinder body 2, a piston rod 4 penetrates through the lower end cover 5 and is connected with the lower end cover 5 in a sliding sealing manner, a sealing end cover 11 is further arranged at one end of the lower end cover 5, a sealed cavity is formed between the lower end cover 5 and the sealing end cover 11, a piston seal 10 is arranged inside the sealed cavity between the sealing end cover 11 and the lower end cover 5, a combined seal 6 is arranged between the piston seal 10 and the lower end cover 5, the piston seal 10 abuts against one end of the combined seal 6, and an adjusting device is further arranged and used for pushing the piston seal 10 to extrude the combined seal 6 so as to adjust a combined seal gap of the combined seal 6. The combined seal 6 is a V-shaped combined seal, and the adjusting device pushes the sealing piston to move left to adjust the V-shaped combined seal gap. The concentric sealing piston is designed to uniformly extrude and adjust the V-shaped combined sealing gap, so that the phenomenon of nonuniform extrusion stress of the V-shaped combined sealing is effectively avoided, excessive friction damage of the V-shaped combined seal is reduced, and the service life of the V-shaped combined seal is prolonged.
In a preferred scheme, the adjusting device is a self-adaptive adjusting device, and the structure is as follows: a cavity is arranged between the piston seal 10 and the lower end cover 5, a pressurizing hole is arranged on the lower end cover 5, a pressurizing device 17 is communicated with the cavity through the pressurizing hole, and the pressurizing device 17 pressurizes to enable the piston seal 10 to extrude the combined seal 6 so as to adjust the combined seal gap of the combined seal 6. And the pressure measuring oil port and the pressurizing oil port of the lower end cover 5 are respectively externally connected with a pressure measuring joint 7, wherein the pressure measuring joint 7 is used for measuring the sealing leakage pressure, and the pressurizing joint is used for introducing pressure oil and pushing the sealing piston to act so as to extrude the V-shaped seal, so that the V-shaped seal gap is adjusted.
In the preferred scheme, the piston seal 10 is sleeved inside the lower end cover 5, the end part of the piston seal 10 is provided with a boss, the end face of the boss abuts against the sealing end cover 11, the bottom surface of one side of the boss and the sealing end cover 11 form a cavity IV 21, a pressurizing joint 9 is arranged on a pressurizing hole of the lower end cover 5, and the pressurizing joint 9 is communicated with the cavity IV 21. The pressurizing connector 9 is used for pressurizing and extruding the V-shaped combined seal for the cavity four 21.
In the preferred scheme, adjusting device is screw rod adjusting device, and the structure is: the piston sealing device comprises an adjusting screw rod 23, wherein the adjusting screw rod 23 penetrates through a sealing end cover 11 to be connected with a piston seal 10, the end part of the adjusting screw rod 23 abuts against the piston seal 10 or is in threaded connection with the piston seal 10, an adjusting nut 24 is further arranged on the adjusting screw rod 23, and the end face of the adjusting nut 24 abuts against the sealing end cover 11 and is used for locking the adjusting screw rod 23. The adjusting nut 24 is rotated in the first direction, then the adjusting screw 23 is rotated, the adjusting screw 23 pushes the piston seal 10 to move left to adjust the V-shaped combined seal gap, and after the adjustment is finished, the adjusting nut 24 is rotated to lock the adjusting screw 23.
In a preferable scheme, a first table 25 is arranged on the piston seal 10, a third cavity 20 is formed by the first table 25 and a first boss surface inside the lower end cover 5, and a spring 8 is arranged inside the third cavity 20. The spring 8 in the cavity III 20 is used for balancing the extrusion force of the combined seal 6 and the hydraulic thrust of the end face of the piston seal 10, so that the extrusion amount of the combined seal 6 is adjusted, the hydraulic thrust of the end face of the piston seal 10 is too large, the combined seal 6 is excessively extruded, and the abrasion of the combined seal 6 is aggravated.
In a preferable scheme, a second table surface 26 is further arranged on one side of the first table surface 25, the first cavity 18 is formed between the second table surface 26 and a second boss surface inside the lower end cover 5, the distance between the second table surface 26 and the second boss surface of the lower end cover 5 is delta, and delta is 0-4 mm. The pressurizing connector is matched with a damping spring for use, the axial compression amount of the V-shaped combined seal can be controlled in real time within the range of 0-delta of the seal adjusting gap, the first cavity 18 is a seal containing cavity between the lower end cover 5 and the seal piston, and the gap delta is the maximum adjusting length of the V-shaped combined seal.
In the preferred scheme, an oil hole 12 is formed in the piston seal 10, an annular groove body is formed in the inner wall of the piston seal 10, the groove body and the piston rod 4 form a second cavity 19, the oil hole 12 is communicated with the second cavity 19, a pressure measuring joint 7 is arranged on the lower end cover 5, and the pressure measuring joint 7 is communicated with the second cavity 19 through the oil hole 12. The second cavity 19 forms an oil storage space for detecting oil pressure, and the oil pressure in the second cavity 19 is conveniently measured to observe the internal sealing condition of the piston rod 4.
In a preferable scheme, the pressure measuring joint 7 is electrically connected with the detection device 16, the detection device 16 is electrically connected with the pressurizing device 17, and the pressurizing device 17 is communicated with the pressurizing joint 9. After the pressure is measured by the pressure measuring joint 7, the pressure is automatically increased by the pressure increasing device 17.
In the preferred scheme, the combined seal 6 is a V-shaped combined seal, or a Y-shaped combined seal, or a Glae ring, or an O-shaped ring, and the V-shaped combined seal is preferred in the scheme.
A plurality of groove bodies are arranged inside the piston seal 10, a guide sleeve 15 is arranged inside each groove body, a plurality of combined seal grooves are arranged inside and on the outer wall of the piston seal 10, and piston rod combined seals 14 are arranged inside the combined seal grooves; a first O-shaped sealing ring is arranged between the sealing end cover 11 and the lower end cover 5, a second O-shaped sealing ring is also arranged between the piston seal 10 and the lower end cover 5, an O-shaped sealing groove 13 is formed in the outer wall of the piston seal, and the second O-shaped sealing ring is arranged inside the O-shaped sealing groove 13. The guide sleeve 15, the O-shaped sealing ring and the piston rod are combined for sealing, so that the whole piston seal 10 has a better sealing effect.
Example 2
Further described with reference to embodiment 1, as shown in fig. 1 to 6, the adaptive adjustment method includes:
a closed cavity is formed between the end cover 5 and the sealing end cover 11, and the piston seal 10 is arranged in the closed cavity.
And installing a pressure measuring joint 7, wherein the pressure measuring joint 7 is communicated with a second cavity 19 inside the piston seal 10, the pressure measuring joint 7 is used for measuring the seal leakage pressure, and the pressure measuring joint 7 is communicated with the detection device 16.
And installing a pressurizing connector 9, wherein the pressurizing connector 9 is communicated with the cavity IV 21, and the pressurizing connector 9 is communicated with a pressurizing device 17.
The detection device 16 measures the pressure in the cavity II 19, the pressure in the cavity II 19 is sealing leakage pressure, data are transmitted to the detection device 16 after the leakage pressure is measured, the detection device 16 controls the pressurization device 17 according to the measured transmission, the pressurization device 17 feeds oil from the pressurization joint 9 through a hydraulic system, and the piston seal 10 is pushed to move left to adjust the V-shaped combined seal gap.
The spring 8 in the cavity III 20 is used for balancing the extrusion force of the combined seal 6 and the hydraulic thrust of the end face of the piston seal 10, so that the extrusion amount of the combined seal 6 is adjusted, the hydraulic thrust of the end face of the piston seal 10 is too large, the combined seal 6 is excessively extruded, and the abrasion of the combined seal 6 is aggravated.
The screw adjusting method comprises the following steps:
and in the same first and second steps, installing an adjusting screw 23, wherein the adjusting screw 23 is in threaded connection with the sealing end cover 11, so that the end part of the adjusting screw 23 abuts against the piston seal 10 or is in threaded connection with the piston seal 10.
The pressure tap 7 is used to measure the seal leakage pressure, which is displayed by the detection means 16.
The adjusting nut 24 is turned in the first direction, and then the adjusting screw 23 is turned, and the adjusting screw 23 pushes the piston seal 10 to move left to adjust the V-shaped combined seal gap.
After the adjustment is finished, the adjusting nut 24 is rotated to lock the adjusting screw 23.
Example 3
Further described with reference to embodiments 1 and 2, as shown in fig. 1 to 6, the hydraulic cylinder adaptive dynamic sealing device includes a cylinder body 2, an upper end cover 1, a piston assembly 3, a piston rod 4, a lower end cover 5, a sealing end cover 11, and a sealing piston 10. Two ends of the cylinder body 2 are respectively connected to the upper end cover 1 and the lower end cover 5, the piston assembly 3 is fixedly arranged at one end of the piston rod 4 and moves inside the cylinder body 2, the sealing end cover 11 is connected to the lower end cover 5, and the sealing piston 10 is arranged between the lower end cover 5 and the sealing end cover 11.
The lower end cover 5, its pore wall is equipped with 2 hydraulic fluid ports, 1 be the pressure measurement hydraulic fluid port with the front end oilhole of sealed piston 10 communicates with each other, 1 be the pressure hydraulic fluid port and hold the chamber 4 and communicate with each other, be equipped with O type sealing washer between lower end cover 5 and cylinder body 2, with be equipped with V combination seal between piston rod 4, sealed end cover 11, its with lower end cover 5 is with bolted connection, uses O type circle to seal with lower end cover 5, and is equipped with combination seal and dust ring between piston rod 4, sealed piston 10, its front end orifice wall is equipped with the oilhole, and the oilhole upper end communicates with each other with the pressure measurement hydraulic fluid port, and the oilhole lower extreme communicates with each other with holding two 19 cavitys, be equipped with combination seal and guidance tape between sealed piston 10 and lower end cover 5 and piston rod 4.
Further, a pressure measuring oil port and a pressurizing oil port of the lower end cover 5 are respectively externally connected with a pressure joint, wherein the pressure measuring joint is used for measuring sealing leakage pressure, and the pressurizing joint is used for introducing pressure oil and pushing the sealing piston 10 to act so as to extrude the V-shaped seal, so that the V-shaped seal gap is adjusted.
Further, the end face of the sealing piston 10 is provided with a threaded hole, so that the sealing piston 10 is convenient to assemble.
Further, a spring is arranged in the accommodating cavity 3 and used for adjusting a friction gap between the V-shaped combined seal and the piston rod 4.
Further, the first cavity 18 is a sealed cavity between the lower end cover 5 and the sealing piston 10, and a gap δ of the first cavity is the maximum adjustment length of the V-shaped combined seal.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.
Claims (9)
1. The utility model provides a pneumatic cylinder self-adaptation sealing device which characterized by: the piston assembly is characterized in that an upper end cover (1) and a lower end cover (5) are arranged at two ends of a cylinder body (2), a piston assembly (3) is arranged inside the cylinder body (2), a piston rod (4) penetrates through the lower end cover (5) and is connected with the lower end cover (5) in a sliding and sealing mode, a sealing end cover (11) is further arranged at one end of the lower end cover (5), a sealed cavity is formed between the lower end cover (5) and the sealing end cover (11), a piston seal (10) is arranged inside the sealed cavity between the sealing end cover (11) and the lower end cover (5), a combined seal (6) is arranged between the piston seal (10) and the lower end cover (5), the piston seal (10) is abutted against one end of the combined seal (6), and an adjusting device is further arranged and used for pushing the piston seal (10) to extrude the combined seal (6) so as to adjust a combined seal gap of the combined seal (6).
2. The adaptive sealing device for the hydraulic cylinder as claimed in claim 1, wherein: the adjusting device is a self-adaptive adjusting device and has the structure that: a cavity is arranged between the piston seal (10) and the lower end cover (5), a pressurizing hole is arranged on the lower end cover (5), and the pressurizing device (17) is communicated with the cavity through the pressurizing hole;
the pressurizing device (17) pressurizes to enable the piston seal (10) to press the combined seal (6) so as to adjust the combined seal gap of the combined seal (6).
3. The adaptive sealing device for the hydraulic cylinder as claimed in claim 2, wherein: the piston seal (10) is sleeved inside the lower end cover (5), the end part of the piston seal (10) is provided with a boss, the end face of the boss abuts against the sealing end cover (11), the bottom surface of one side of the boss and the sealing end cover (11) form a cavity four (21), a pressurizing joint (9) is arranged on a pressurizing hole of the lower end cover (5), and the pressurizing joint (9) is communicated with the cavity four (21).
4. The adaptive sealing device for the hydraulic cylinder as claimed in claim 1, wherein: adjusting device is screw rod adjusting device, and the structure is: the piston sealing device comprises an adjusting screw rod (23), wherein the adjusting screw rod (23) penetrates through a sealing end cover (11) to be connected with a piston seal (10), and the end part of the adjusting screw rod (23) abuts against the piston seal (10) or is in threaded connection with the piston seal (10);
an adjusting nut (24) is further arranged on the adjusting screw rod (23), and the end face of the adjusting nut (24) abuts against the sealing end cover (11) and is used for locking the adjusting screw rod (23).
5. The adaptive sealing device for the hydraulic cylinder as claimed in claim 1, wherein: a first table board (25) is arranged on the piston seal (10), a cavity III (20) is formed by the first table board (25) and a first boss surface inside the lower end cover (5), and a spring (8) is arranged inside the cavity III (20).
6. The adaptive sealing device for the hydraulic cylinder as claimed in claim 1, wherein: a second table top (26) is further arranged on one side of the first table top (25), a first cavity (18) is formed between the second table top (26) and a second boss surface in the lower end cover (5), the distance between the second table top (26) and the diameter of the second boss surface of the lower end cover (5) is delta, and delta is 0-4 mm.
7. The adaptive sealing device for the hydraulic cylinder as claimed in claim 1, wherein: an oil hole (12) is formed in the piston seal (10), an annular groove body is formed in the inner wall of the piston seal (10), a second cavity (19) is formed by the groove body and the piston rod (4), the oil hole (12) is communicated with the second cavity (19), a pressure measuring joint (7) is arranged on the lower end cover (5), and the pressure measuring joint (7) is communicated with the second cavity (19) through the oil hole (12).
8. The adaptive sealing device for the hydraulic cylinder as claimed in claim 7, wherein: the pressure measuring joint (7) is electrically connected with the detection device (16), the detection device (16) is electrically connected with the pressurizing device (17), and the pressurizing device (17) is communicated with the pressurizing joint (9).
9. The adaptive sealing device for the hydraulic cylinder as claimed in claim 1, wherein: the combined seal (6) is a V-shaped combined seal, or a Y-shaped combined seal, or a Glare ring, or an O-shaped ring;
a plurality of groove bodies are arranged in the piston seal (10), and guide sleeves (15) are arranged in the groove bodies;
a plurality of combined sealing grooves are formed in the inner part and the outer wall of the piston seal (10), and piston rod combined seals (14) are arranged in the combined sealing grooves;
a first O-shaped sealing ring is arranged between the sealing end cover (11) and the lower end cover (5);
a second O-shaped sealing ring is also arranged between the piston seal (10) and the lower end cover (5), an O-shaped sealing groove (13) is formed in the outer wall of the piston seal, and the second O-shaped sealing ring is arranged inside the O-shaped sealing groove (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122645807.9U CN216407346U (en) | 2021-11-01 | 2021-11-01 | Self-adaptive sealing device of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122645807.9U CN216407346U (en) | 2021-11-01 | 2021-11-01 | Self-adaptive sealing device of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216407346U true CN216407346U (en) | 2022-04-29 |
Family
ID=81298569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122645807.9U Active CN216407346U (en) | 2021-11-01 | 2021-11-01 | Self-adaptive sealing device of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216407346U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017414A (en) * | 2021-11-01 | 2022-02-08 | 武汉力地液压设备有限公司 | Self-adaptive sealing device of hydraulic cylinder and self-adaptive adjusting method |
-
2021
- 2021-11-01 CN CN202122645807.9U patent/CN216407346U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017414A (en) * | 2021-11-01 | 2022-02-08 | 武汉力地液压设备有限公司 | Self-adaptive sealing device of hydraulic cylinder and self-adaptive adjusting method |
| CN114017414B (en) * | 2021-11-01 | 2024-05-07 | 武汉力地液压设备有限公司 | Hydraulic cylinder self-adaptive sealing device and self-adaptive adjusting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216407346U (en) | Self-adaptive sealing device of hydraulic cylinder | |
| CN213235618U (en) | Super wear-resisting leak-proof hydraulic oil cylinder | |
| US5823513A (en) | Delay return gas spring | |
| US5694965A (en) | Pneumatic pressure regulator | |
| CN216691703U (en) | Hydraulic cylinder online detection sealing leakage device and sealing clearance adjusting device thereof | |
| CN114017414A (en) | Self-adaptive sealing device of hydraulic cylinder and self-adaptive adjusting method | |
| ES8501497A1 (en) | An hydraulic piston and cylinder assembly | |
| CN219774845U (en) | Sealing assembly and hydraulic gate valve | |
| CN211288566U (en) | One-way air damper | |
| CN112392710B (en) | Automobile braking system plunger pump and friction force detection method thereof | |
| CN209892678U (en) | Balanced type air spring | |
| CA2118971A1 (en) | Internal Check Valve | |
| CN113898637A (en) | Clamping oil cylinder | |
| CN208184963U (en) | A kind of novel high-performance piston | |
| CN219932933U (en) | Wear-resistant piston | |
| JPS6011356Y2 (en) | Greasing device | |
| JP3780040B2 (en) | Fluid pressure cylinder | |
| CN217084081U (en) | Quick connector | |
| CN208907021U (en) | A kind of modified inclination cylinder structure for fork truck | |
| CN2171040Y (en) | Internal O shape compensating sealed ring | |
| CN112081792B (en) | Piston assembly with locking function | |
| CN220248538U (en) | Engineering hydro-cylinder buffer structure | |
| CN220081833U (en) | Hydraulic cylinder | |
| CN214998546U (en) | Single-rod hydraulic cylinder capable of being used for long stroke | |
| CN216044748U (en) | Floating piston buffer oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |