CN216554739U

CN216554739U - Plug-in hydraulic lock

Info

Publication number: CN216554739U
Application number: CN202122535873.0U
Authority: CN
Inventors: 潘贞周; 陈忠勇; 李明肤; 焦维佳; 雷贝贝
Original assignee: Guizhou Aerospace Control Technology Co Ltd
Current assignee: Guizhou Aerospace Control Technology Co Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-05-17
Anticipated expiration: 2031-10-21

Abstract

The utility model discloses a plug-in hydraulic lock, relates to the technical field of oil pressure sealing devices and aims to solve the problems that a traditional hydraulic lock is complex in oil path, easy to leak and difficult to lock for a long time. The outer valve sleeve is of a cavity structure, the inner valve sleeve is arranged on the outer valve sleeve, the control valve core is arranged in a cavity of the outer valve sleeve, an inner cavity of the outer valve sleeve is divided into an oil inlet cavity and a sliding cavity, a high-pressure oil port communicated with the oil inlet cavity is formed in the outer valve sleeve, an adjusting cavity of the inner valve sleeve faces the outer valve sleeve, the elastic sealing component is arranged in the sealing cavity, a connecting channel of the adjusting cavity and the sealing cavity is sealed, one end, facing the inner valve sleeve, of the control valve core penetrates through an opening in one end of the inner valve sleeve and abuts against the elastic sealing component, an oil inlet is formed in the outer wall of the adjusting cavity, the high-pressure oil port is used for feeding oil, the control valve core is pushed to drive the elastic sealing component to move far away from one side of the outer valve sleeve, the connecting channel is opened, and the oil inlet is communicated with the oil outlet. The plug-in type hydraulic lock is simple in structure, high in self-locking efficiency and capable of being accurately positioned for a long time.

Description

Plug-in hydraulic lock

Technical Field

The utility model relates to the technical field of oil pressure sealing devices, in particular to a plug-in type hydraulic lock.

Background

The servo actuator is one of the common actuators of an aircraft control system, and a piston rod of the servo actuator is required to be locked at a certain fixed position for a long time in many occasions. When the power oil is cut off, the piston rod of the actuator is self-locked under the action of load, and the unlocking function is realized after the power source is switched on at a specific time. The traditional scheme is that a plate-type installation hydraulic locking loop is designed on a servo actuator, but because the plate-type installation hydraulic locking loop is complex in oil circuit and large in structural volume, a large installation space for the servo actuator needs to be occupied, and the requirements of the structural space and the light weight of the servo actuator cannot be met; the hydraulic lock of the servo actuator is installed in a plate mode, the problem of oil leakage inevitably exists, the servo actuator is difficult to guarantee to be locked at a certain fixed position for a long time, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a plug-in type hydraulic lock, which is used for solving the problems that a plate-type installed hydraulic lock in a traditional servo actuator has a complex oil path, occupies a large space, cannot avoid leakage in the prior art, is difficult to ensure that a piston rod is locked at a certain fixed position for a long time and has potential safety hazards.

In order to achieve the above purpose, the utility model provides the following technical scheme:

there is provided a cartridge hydraulic lock comprising: the valve comprises an outer valve sleeve, a control valve core, an inner valve sleeve and an elastic sealing component;

the outer valve sleeve is of a cavity structure with an open end, the inner valve sleeve is arranged at the open end of the outer valve sleeve, the control valve core is arranged in the cavity of the outer valve sleeve, the inner cavity of the outer valve sleeve is divided into an oil inlet cavity and a sliding cavity, a high-pressure oil port communicated with the oil inlet cavity is arranged on the outer valve sleeve, two ends of the inner valve sleeve are opened and comprise an adjusting cavity and a sealing cavity, the adjusting cavity faces the outer valve sleeve, the elastic sealing component is arranged in the sealing cavity and seals a connecting channel between the adjusting cavity and the sealing cavity, the control valve core faces one end of the inner valve sleeve, penetrates through the opening at one end of the inner valve sleeve and is inserted in the adjusting cavity and abutted against one end of the elastic sealing component, an oil inlet is arranged on the outer wall of the adjusting cavity, and the high-pressure oil port feeds oil to push the control valve core to drive the elastic sealing component to move far away from one side of the outer valve sleeve, the connecting channel is opened, and the oil inlet is communicated with the oil outlet at the other end of the inner valve sleeve.

The plug-in type hydraulic lock provided by the utility model is of a plug-in type structure, the control valve core and the elastic sealing component are respectively plugged in the outer valve sleeve and the inner valve sleeve, when high-pressure oil is not injected into the oil inlet cavity of the outer valve sleeve, the elastic sealing component seals a connecting channel of the inner valve sleeve communicated with the adjusting cavity and the sealing cavity, the oil inlet is not communicated with the oil outlet, the oil in the two cavities of the servo actuator can not reversely flow through the one-way valve, the hydraulic lock is self-locked, after the high-pressure oil flows into the high-pressure oil port, the high-pressure oil pushes the control valve core to drive the elastic sealing assembly to move, and then open the interface channel of inner valve barrel, make oil inlet and oil-out intercommunication, the unblock of hydraulic pressure lock, make full use of the pressure of hydraulic oil and the inner structure of hydraulic valve subassembly, the ingenious auto-lock that has realized servo actuator, simple structure, convenient operation, the auto-lock is efficient, is applicable to servo actuator's auto-lock. Moreover, the plug-in type hydraulic lock adopts a special structure, is small in size, is embedded in the servo actuator, enables the actuator to bear large load when moving and stopping, has a long-time accurate positioning function at any position, and has high practicability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic diagram of a plug-in hydraulic lock according to an embodiment of the present invention.

Reference numerals are as follows:

1-outer valve sleeve, 2-second retainer ring, 3-third sealing ring, 4-second sealing ring, 5-adjusting bolt, 6-third retainer ring, 7-fourth sealing ring, 8-control valve core, 9-inner valve sleeve, 10-follow-up valve core, 11-return spring, 12-fifth sealing ring, 13-sealing screw sleeve, 14-first sealing ring, 15-first retainer ring, 16-gasket and 17-locking nut.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A hydraulic lock or a hydraulic valve with a similar principle is adopted in an oil circuit of a hydraulic system of the actuator to prevent liquid from entering and exiting the actuator, so that the movement of a piston rod is locked to realize the locking of the actuator. The hydraulic lock of this mode has board-like installation hydraulic lock and stack formula hydraulic lock, and this mode principle is simple, and locking performance depends on the leakage quantity through sealing washer and valve. The main problems of the mode are that the leakage through the sealing ring and the valve is difficult to control, the locking precision and the locking reliability are generally not high, and the mode is generally suitable for occasions with low locking requirements and short locking time. In addition, the two traditional hydraulic lock structures have the defects of relatively large volume and heavy weight, the valve body is complex in processing technology and high in manufacturing cost, and installation, use and related detection and disassembly are inconvenient.

As shown in fig. 1, the plug-in hydraulic lock provided by the utility model comprises an outer valve sleeve 1, a control valve core 8, an inner valve sleeve 9 and an elastic sealing component; the outer valve sleeve 1 is a cavity structure with an open end, the inner valve sleeve 9 is arranged at the open end of the outer valve sleeve 1, the control valve core 8 is arranged in the cavity of the outer valve sleeve 1, the inner cavity of the outer valve sleeve 1 is divided into an oil inlet cavity and a sliding cavity, the outer valve sleeve 1 is provided with a high-pressure oil port A communicated with the oil inlet cavity, the two ends of the inner valve sleeve 9 are opened and comprise an adjusting cavity and a sealing cavity, the adjusting cavity faces the outer valve sleeve 1, the elastic sealing component is arranged in the sealing cavity and seals a connecting channel between the adjusting cavity and the sealing cavity, one end of the control valve core 8 facing the inner valve sleeve 9 penetrates through the opening at one end of the inner valve sleeve 9 and is inserted into the adjusting cavity, and the oil inlet B is arranged on the outer wall of the adjusting cavity, the high-pressure oil port A is used for feeding oil, the control valve core 8 is pushed to drive the elastic sealing component to move towards one side far away from the outer valve sleeve 1, the connecting channel is opened, and the oil inlet B is communicated with the oil outlet C at the other end of the inner valve sleeve 9.

The specific working process is as follows: the plug-in hydraulic lock mainly comprises an outer valve sleeve 1, an inner valve sleeve 9, a control valve core 8, a follow-up valve core 10 and a return spring 11. The outer valve sleeve 1 is provided with internal threads, the inner valve sleeve 9 is provided with external threads, the outer valve sleeve 1 and the inner valve sleeve 9 are connected into a whole through threads, the outer valve sleeve 1 and the inner valve sleeve 9 are provided with hollow columnar cavities, a high-pressure oil port A is formed in the outer valve sleeve 1 to enable the inner cavity to be communicated with a control oil way, an oil inlet B is formed in the outer side wall of the inner valve sleeve 9 to be communicated with a servo valve control valve port, and an oil outlet C formed in the sealing screw sleeve 13 is communicated with an oil inlet and an oil outlet of the servo actuating cylinder.

When the system is not pressurized, a follow-up valve core 10 of the plug-in hydraulic lock is propped against an inner hole of an inner valve sleeve 9 under the action of a return spring 11 to cut off an oil path between an actuator and a load cavity of the servo valve, oil in two cavities of the actuator cannot reversely flow through a one-way valve, a piston rod is locked, and the hydraulic lock is self-locked.

After the system builds pressure, high-pressure oil at a high-pressure oil port A of the plug-in hydraulic lock acts on the control valve core 8, the control valve core 8 overcomes the thrust of a return spring 11 to enable the conical surface of a follow-up valve core 10 to be separated from contact with the annular groove of the inner valve sleeve 9, a channel from a high-pressure oil path to an oil outlet C of the inner cavity of the inner valve sleeve 9 is opened, a load cavity of a servo valve is communicated with the oil outlet C through an oil inlet B of the plug-in hydraulic lock, the hydraulic lock is unlocked, and at the moment, an actuator can randomly act under the control of the servo valve,

the cartridge hydraulic lock provided by the utility model is of a cartridge structure, a control valve core 8 and an elastic sealing component are respectively inserted in an outer valve sleeve 1 and an inner valve sleeve 9, when high-pressure oil is not filled in an oil inlet cavity of the outer valve sleeve 1, the elastic sealing component seals a connecting channel of the inner valve sleeve 9 communicated with a regulating cavity and a sealing cavity, an oil inlet B is not communicated with an oil outlet C, oil in two cavities of a servo actuator cannot reversely flow through a follow-up valve core 10, the hydraulic lock is self-locked, after the high-pressure oil flows into the high-pressure oil from a high-pressure oil port A, the high-pressure hydraulic oil pushes the control valve core 8 to drive the elastic sealing component to move, so that the connecting channel of the inner valve sleeve 9 is opened, the oil inlet B is communicated with the oil outlet C, the hydraulic lock is unlocked, the pressure of the hydraulic oil and the internal structure of the hydraulic valve component are fully utilized, the self-locking of the servo actuator is ingeniously realized, the structure is simple, the operation is convenient, and the self-locking efficiency is high, the self-locking mechanism is suitable for self-locking of the servo actuator. Moreover, the plug-in type hydraulic lock adopts a special structure, is small in size, is embedded in the servo actuator, enables the actuator to bear large load when moving and stopping, has a long-time accurate positioning function at any position, and has high practicability.

As an embodiment, the elastic closing assembly comprises a follower valve core 10 and a return spring 11; one end of the follow-up valve core 10 penetrates through the connecting channel and abuts against one end, facing the inner valve sleeve 9, of the control valve core 8, the return spring 11 is located in the sealing cavity and is in a compression state, the outer side wall, facing one side of the adjusting cavity, of the follow-up valve core 10 abuts against the inner side wall, facing the position of the connecting channel of the sealing cavity, and the connecting channel is closed.

The setting of the return spring 11 makes the outer side wall of the side of the servo valve core 10 facing the adjusting cavity better offset with the inner side wall of the connecting channel position of the sealing cavity, so as to realize the sealing of the connecting channel, and the return spring 11 can be in a micro-compression state in order to ensure the sealing effect.

As an implementation mode, the spool 10 is integrally formed, has a Y-shaped longitudinal section, and includes a connection column, a sealing bevel and a sliding ring; the connecting column, the sealing inclined plane and the sliding ring are sequentially connected, the sealing inclined plane inclines towards one side far away from the outer valve sleeve 1, the connecting column penetrates through the connecting channel to be abutted against the control valve core 8, the sealing inclined plane and the sealing cavity abut against the inner side wall of one side of the outer valve sleeve 1, and the sliding ring is slidably installed in the sealing cavity and abuts against one end of the return spring 11.

The follow-up valve core 10 of Y type structure can be better with the inside wall cooperation in connecting channel and sealed chamber, realize the sealed to connecting channel, also make follow-up valve core 10 can be better offset with control valve core 8 to after high-pressure oil port A flowed into high pressure oil, realize control valve core 8 to the drive of follow-up valve core 10, and then realize opening connecting channel. The position of the sealing inclined plane of the follow-up valve core 10 is a conical surface, an annular groove is arranged at the position, corresponding to the conical surface, of the inner valve sleeve 9, and when the connecting channel is sealed, the conical surface is positioned in the annular groove and is in close contact with the annular groove, and the restoring force of the restoring spring 11 is matched to ensure the sealing effect. In order to better realize the sealing of the connecting channel, the sliding ring is in sliding connection with the inner side wall of the sealing cavity nested in the sliding ring, the follow-up valve core 10 is prevented from shaking in the moving process, hydraulic oil leakage cannot occur between the inner side walls of the sealing cavity of the sliding ring, and the oil passing hole is formed in the position where the conical surface is connected with the sliding ring, so that the oil inlet B is communicated with the oil outlet C after the conical surface is separated from the annular groove.

As an embodiment, the inner valve housing 9 further comprises a sealing screw sleeve 13; the sealing threaded sleeve 13 is arranged at one end, far away from the outer valve sleeve 1, of the inner valve sleeve 9, the servo valve core 10 and the return spring 11 are fixed in the sealing cavity and abut against the other end of the return spring 11, and the oil outlet C is formed in the sealing threaded sleeve 13.

The arrangement of the sealing threaded sleeve 13 realizes the installation and fixation of the follow-up valve core 10 and the return spring 11, the installation between the sealing threaded sleeve 13 and the inner valve sleeve 9 adopts a thread installation mode, and the installation, combination and later maintenance are more convenient.

As an implementation mode, the control valve core 8 is a T-shaped structure, the control valve core 8 is slidably installed in the cavity of the outer valve sleeve 1, and the oil inlet cavity is not communicated with the sliding cavity.

The control valve core 8 with the T-shaped structure is slidably installed in the inner cavity of the outer valve sleeve 1, the inner cavity of the outer valve sleeve 1 is divided into an oil inlet cavity and a sliding cavity which are not communicated with each other, the oil inlet cavity is communicated with the outside only through a high-pressure oil port A, and the pushing effect of high-pressure oil on the control valve core 8 after entering the oil inlet cavity is ensured.

As an embodiment, the control valve core 8 further comprises a first retainer ring 15 and a first sealing ring 14; a first annular groove is formed in the position where the control valve core 8 is in contact with the inner cavity of the outer valve sleeve 1, a first check ring 15 and a first sealing ring 14 are installed in the first annular groove from inside to outside, and the first sealing ring 14 is in close contact with the inner cavity wall of the outer valve sleeve 1.

The arrangement of the first retainer ring 15 and the first seal ring 14 ensures the sealing effect between the control valve core 8 and the inner cavity wall of the outer valve sleeve 1, and the contact between the outer wall of the control valve core 8 and the inner cavity wall of the outer valve sleeve 1 is matched, so that the double sealing effect is realized, and the high-pressure oil leakage condition is avoided after the high-pressure oil enters the oil inlet cavity.

As an alternative, the end of the inner valve sleeve 9 facing the outer valve sleeve 1 is screwed and sealed to the end of the outer valve sleeve 1 facing the inner valve sleeve 9.

The inner valve sleeve 9 and the outer valve sleeve 1 are installed in a threaded mode, so that the combined installation of the plug-in hydraulic lock and the maintenance work in the later period are facilitated, the threaded installation mode can also play a good sealing effect, and the processing is more convenient.

As an implementation mode, the outer valve sleeve 1 further comprises an adjusting bolt 5 and a locking nut 17; the one end that interior valve barrel 9 was kept away from to outer valve barrel 1 is provided with the regulation hole, and adjusting bolt 5's one end is located the inner chamber of outer valve barrel 1, and its other end wears out the regulation hole, and lock nut 17 installs on adjusting bolt 5 to it is sealed with the regulation hole.

Adjusting bolt 5 and lock nut 17's setting, the installation and the later maintenance to control case 8 have been made things convenient for, when filling the fluid for servo actuator in later maintenance, lock nut 17 needs to be loosened, through adjusting bolt 5, just can move control case 8 towards interior valve barrel 9 direction, control case 8 overcomes the thrust of answer spring 11 and makes the conical surface of follow-up valve core 10 break away from the contact with the ring channel of interior valve barrel 9, make the passageway of high pressure oil circuit to the oil-out C of interior valve barrel 9 inner chamber open the back, the fluid of accomplishing servo actuator fills and fills. After the actuator is maintained, the control valve core 8 moves towards the direction of the outer valve sleeve 1 through the adjusting bolt 5, and the thrust of the return spring 11 enables the conical surface of the follow-up valve core 10 to be in contact with the annular groove of the inner valve sleeve 9 to realize self-locking of the actuator. Furthermore, the adjusting bolt 5 is connected with the outer valve sleeve 1 in a threaded manner, the position of the control valve core 8 in the outer valve sleeve 1 can be adjusted by rotating the adjusting bolt 5, and the long-time fixation of the response position of the control valve core 8 is realized by matching with the return spring 11 and the locking nut 17.

As an embodiment, the outer valve housing 1 further comprises a gasket 16 and a second sealing ring 4; the washer 16 is sleeved on the adjusting bolt 5 and is positioned between the locking nut 17 and the outer valve sleeve 1, a second annular groove is formed in one end, positioned in the inner cavity of the outer valve sleeve 1, of the adjusting bolt 5, and the second sealing ring 4 is installed in the second annular groove and is in close contact with the inner cavity wall of the outer valve sleeve 1.

The gasket 16 is arranged, so that the locking nut 17 can be conveniently mounted and dismounted, the sealing effect between the adjusting bolt 5 and the side wall of the inner cavity of the outer valve sleeve 1 is further ensured due to the arrangement of the second sealing ring 4, the leakage of high-pressure oil entering the oil inlet cavity is avoided, and the effect of pushing the control valve core 8 to move by the high-pressure oil is ensured.

As an implementation mode, the plug-in hydraulic lock further comprises a second retainer ring 2, a third retainer ring 6, a third seal ring 3, a fourth seal ring 7 and a fifth seal ring 12; the outer side wall of the outer valve sleeve 1 close to two ends is respectively provided with a third annular groove and a fourth annular groove, a second retainer ring 2 and a third seal ring 3 are arranged in the third annular groove, and a third retainer ring 6 and a fourth seal ring 7 are arranged in the fourth annular groove; one end of the inner valve sleeve 9, which is far away from the outer valve sleeve 1, is provided with a fifth annular groove, and a fifth sealing ring 12 is arranged in the fifth annular groove.

The second retainer ring 2, the third seal ring 3, the third retainer ring 6, the fourth seal ring 7 and the fifth seal ring 12 are arranged, so that the sealing effect of the plug-in hydraulic lock after being installed on the servo actuator is ensured. Meanwhile, the outer cavity wall of the hydraulic lock is divided into three parts which are respectively communicated with the cavities corresponding to the servo actuators and are sealed, and the combination and installation are more convenient.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cartridge hydraulic lock, comprising: the valve comprises an outer valve sleeve, a control valve core, an inner valve sleeve and an elastic sealing component;

2. The cartridge hydraulic lock according to claim 1, wherein the resilient closure assembly comprises a follower spool and a return spring; one end of the follow-up valve core penetrates through the connecting channel and abuts against one end, facing the inner valve sleeve, of the control valve core, the return spring is located in the sealing cavity and is in a compressed state, the outer side wall, facing one side of the adjusting cavity, of the follow-up valve core abuts against the inner side wall, located at the position of the connecting channel of the sealing cavity, of the follow-up valve core, and the connecting channel is closed.

3. The cartridge hydraulic lock according to claim 2, wherein the follower valve core is integrally formed, has a Y-shaped longitudinal section and comprises a connecting column, a sealing bevel and a sliding ring; the spliced pole sealed inclined plane and the slip ring is connected in proper order, sealed inclined plane is to keeping away from the one side slope of outer valve barrel, the spliced pole passes connect the passageway with the control case offsets, sealed inclined plane with the sealed chamber orientation the inside wall of outer valve barrel one side offsets, the slip ring slidingtype is installed sealed the intracavity, with the one end of replying the spring offsets.

4. The cartridge hydraulic lock of claim 3, wherein the inner valve housing further comprises a sealing nut; the sealing threaded sleeve is arranged at one end, far away from the outer valve sleeve, of the inner valve sleeve, the servo valve core and the return spring are fixed in the sealing cavity and are abutted against the other end of the return spring, and the oil outlet is formed in the sealing threaded sleeve.

5. The cartridge hydraulic lock according to claim 1, wherein the control valve core is of a T-shaped structure, the control valve core is slidably installed in the cavity of the outer valve sleeve, and the oil inlet cavity is not communicated with the sliding cavity.

6. The cartridge hydraulic lock according to claim 5, wherein the control valve spool further comprises a first check ring and a first seal ring; the control valve core is provided with a first annular groove at the position contacting with the inner cavity of the outer valve sleeve, the first check ring and the first sealing ring are arranged in the first annular groove from inside to outside, and the first sealing ring is in close contact with the inner cavity wall of the outer valve sleeve.

7. The cartridge hydraulic lock of claim 1, wherein an end of the inner housing facing the outer housing is threadably mounted and sealed with an end of the outer housing facing the inner housing.

8. The cartridge hydraulic lock according to claim 1, wherein the outer valve sleeve further comprises an adjusting bolt and a lock nut; the one end that interior valve barrel was kept away from to outer valve barrel is provided with the regulation hole, adjusting bolt's one end is located in the inner chamber of outer valve barrel, and its other end wears out the regulation hole, lock nut installs on adjusting bolt, and will the regulation hole is sealed.

9. The cartridge hydraulic lock of claim 8, wherein the outer valve housing further comprises a washer and a second seal ring; the adjusting bolt is sleeved on the adjusting bolt and is positioned between the locking nut and the outer valve sleeve, a second annular groove is formed in one end, positioned in an inner cavity of the outer valve sleeve, of the adjusting bolt, and a second sealing ring is installed in the second annular groove and is in close contact with the wall of the inner cavity of the outer valve sleeve.

10. The cartridge hydraulic lock according to claim 1, further comprising a second retainer ring, a third seal ring, a fourth seal ring, and a fifth seal ring; the outer side wall of the outer valve sleeve, which is close to two ends, is respectively provided with a third annular groove and a fourth annular groove, the second retaining ring and the third sealing ring are arranged in the third annular groove, and the third retaining ring and the fourth sealing ring are arranged in the fourth annular groove; one end of the inner valve sleeve, which is far away from the outer valve sleeve, is provided with a fifth annular groove, and a fifth sealing ring is arranged in the fifth annular groove.