CN111895022A - Hydraulic damper with external leakage service prevention function - Google Patents

Hydraulic damper with external leakage service prevention function Download PDF

Info

Publication number
CN111895022A
CN111895022A CN202010617851.6A CN202010617851A CN111895022A CN 111895022 A CN111895022 A CN 111895022A CN 202010617851 A CN202010617851 A CN 202010617851A CN 111895022 A CN111895022 A CN 111895022A
Authority
CN
China
Prior art keywords
piston
end cover
oil tank
damper
hole
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.)
Withdrawn
Application number
CN202010617851.6A
Other languages
Chinese (zh)
Inventor
钱雪松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Campus of Hohai University
Original Assignee
Changzhou Campus of Hohai University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changzhou Campus of Hohai University filed Critical Changzhou Campus of Hohai University
Priority to CN202010617851.6A priority Critical patent/CN111895022A/en
Publication of CN111895022A publication Critical patent/CN111895022A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3221—Constructional features of piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods

Abstract

The invention discloses a hydraulic damper with an external leakage service-preventing function, which comprises a right pin head, a right end cover, an outer cylinder barrel, an auxiliary oil tank right piston, an inner cylinder barrel, a damper piston rod, a baffle ring, a floating valve seat, an auxiliary oil tank left piston, a left end cover, a left pin head, an auxiliary oil tank piston return spring and a middle cylinder barrel. According to the invention, through an innovative structural design, the double-layer sealing device is arranged between the piston rod and the end cover of the hydraulic damper, the oil leakage groove is formed between the two layers of sealing devices, and the oil leakage groove is led out into the low-pressure auxiliary oil tank through a related oil way, so that the external leakage risk of the hydraulic damper is greatly reduced, the reliable work of the hydraulic damper is ensured, and the hydraulic damper has a wide application prospect.

Description

Hydraulic damper with external leakage service prevention function
Technical Field
The invention relates to a hydraulic damper, in particular to a hydraulic damper with an external leakage service-proof function, and belongs to the fields of machinery, hydraulic pressure, damping buffering, shock resistance and the like.
Background
At present, the hydraulic damper is widely applied to the field of anti-seismic and shock absorption. In the application process of the hydraulic damper, the oil leakage condition of the hydraulic damper often occurs, once the oil leakage occurs to the hydraulic damper, on one hand, the environment can be polluted, on the other hand, the hydraulic damper can lose the damping function and cannot work normally. The leakage form of the hydraulic damper comprises an inner leakage form and an outer leakage form, particularly, the outer leakage needs to be strictly controlled, in some special occasions, the outer leakage of the hydraulic damper is strictly forbidden, and the outer leakage of a hydraulic oil cylinder is commonly existed in dynamic sealing occasions, such as between a piston rod and an end cover of the hydraulic damper.
Disclosure of Invention
In order to effectively solve the problem of external leakage of the hydraulic damper, the invention provides the hydraulic damper with the function of external leakage prevention.
The technical scheme of the invention is as follows:
a hydraulic damper with an external leakage service-prevention function comprises a right pin head, a right end cover, an outer cylinder barrel, an auxiliary oil tank right piston, an inner cylinder barrel, a damper piston rod, a baffle ring, a floating valve seat, an auxiliary oil tank left piston, a left end cover, a left pin head, an auxiliary oil tank piston return spring and a middle cylinder barrel;
a right end cover first step, a right end cover second step and a right end cover third step are sequentially processed on the outer circumferential wall of the right end cover from left to right, and a right end cover oil through hole is radially processed at the upper part of the right end cover second step; a right end cover damping hole is formed in the upper side of the left part of the right end cover, the left end of the right end cover damping hole penetrates through the left end face of the right end cover, and the right end of the right end cover damping hole is communicated with the right end cover oil through hole; a right end cover normally open one-way valve is mounted on the lower side of the left part of the right end cover, an outlet of the right end cover normally open one-way valve is communicated to the left end face of the right end cover, and an inlet of the right end cover normally open one-way valve is communicated with the right end cover oil through hole; an auxiliary oil tank right piston right side inner ring groove is processed on the inner side of the right end of the auxiliary oil tank right piston, an auxiliary oil tank right piston right side outer ring groove is processed on the outer side of the right end of the auxiliary oil tank right piston, an auxiliary oil tank right piston oil through hole which is radially communicated is processed between the auxiliary oil tank right piston right side inner ring groove and the auxiliary oil tank right piston right side outer ring groove, an auxiliary oil tank right piston left side ring groove is processed on the inner side of the left end of the auxiliary oil tank right piston, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank right piston, and an auxiliary oil tank right piston inner sealing ring and an; steps are processed at the left end and the right end of the damper piston, a first damper piston oil through hole which is radially communicated is processed on the left step of the damper piston, a second damper piston oil through hole which is radially communicated is processed on the right step of the damper piston, a first damper piston normally-open check valve and a second damper piston normally-open check valve are installed inside the damper piston, the outlet of the first damper piston normally-open check valve is communicated with the first damper piston oil through hole, the outlet of the second damper piston normally-open check valve is communicated with the second damper piston oil through hole, and the inlet of the first damper piston normally-open check valve is communicated with the inlet of the second damper piston normally-open check valve; a damper piston damping hole is formed in the damper piston, the left end of the damper piston damping hole is communicated with a first oil through hole of the damper piston, and the right end of the damper piston damping hole is communicated with a second oil through hole of the damper piston; a baffle ring groove is formed in the middle of the left side of the baffle ring, a baffle ring oil through hole is formed in the right side of the baffle ring, and the baffle ring oil through hole axially penetrates through the baffle ring groove and the right end face of the baffle ring; a sealing ring groove is processed in an inner hole of the floating valve seat, and a floating valve seat sealing ring is arranged in the sealing ring groove; an auxiliary oil tank left piston left side inner ring groove is processed on the inner side of the left end of the auxiliary oil tank left piston, an auxiliary oil tank left piston left side outer ring groove is processed on the outer side of the left end of the auxiliary oil tank left piston, an auxiliary oil tank left piston oil through hole which is radially communicated is processed between the auxiliary oil tank left piston left side inner ring groove and the auxiliary oil tank left piston left side outer ring groove, an auxiliary oil tank left piston right side ring groove is processed on the inner side of the right end of the auxiliary oil tank left piston, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank left piston, and an auxiliary oil tank left piston inner sealing ring and an auxiliary; a left end cover annular oil groove is processed in the middle of an inner hole of the left end cover, a left end cover first step, a left end cover second step and a left end cover third step are sequentially processed on the outer circumferential wall of the left end cover from right to left, a left end cover first oil through hole is radially processed in the upper portion of the left end cover second step and communicated with the left end cover annular oil groove, a left end cover second oil through hole is axially processed in the right end of the left end cover, the left end of the left end cover second oil through hole is communicated with the left end cover first oil through hole, and the right end of the left end cover second oil through hole penetrates to the right end face of the left end cover; the right end and the left end of the middle cylinder barrel are respectively provided with a middle cylinder barrel right oil through hole and a middle cylinder barrel left oil through hole which are radially communicated; the right pin head and the right end cover are reliably connected into a whole; the right end of the inner cylinder barrel is sleeved on the first step of the right end cover, and reliable sealing is formed between the right end inner hole of the inner cylinder barrel and the first step of the right end cover; the damper piston and the damper piston rod form reliable connection and sealing; the damper piston and the damper piston rod are inserted into the inner cylinder barrel, and reliable sealing and guiding are formed between the damper piston and the inner cylinder barrel; the baffle ring and the floating valve seat are sequentially sleeved on the damper piston rod from left to right, a seal with a certain tightness is formed between the floating valve seat and the damper piston rod, and the floating valve seat is accommodated in the baffle ring groove; the auxiliary oil tank right piston, the auxiliary oil tank piston reset spring and the auxiliary oil tank left piston are sequentially sleeved on the outer cylindrical wall of the inner cylinder barrel from left to right, the left end of the auxiliary oil tank piston reset spring is installed into the right annular groove of the auxiliary oil tank left piston, the right end of the auxiliary oil tank piston reset spring is installed into the left annular groove of the auxiliary oil tank right piston, the left end and the right end of the auxiliary oil tank piston reset spring respectively abut against the auxiliary oil tank left piston and the auxiliary oil tank right piston, and reliable sealing is formed between the auxiliary oil tank right piston and the auxiliary oil tank left piston and the outer cylindrical wall of the inner cylinder barrel; the middle cylinder barrel is sequentially sleeved on a left piston of the auxiliary oil tank, a right piston of the auxiliary oil tank and a third step of the right end cover from left to right, and reliable sealing is formed between an inner hole of the middle cylinder barrel and the outer walls of the left piston of the auxiliary oil tank and the right piston of the auxiliary oil tank respectively; the right end of the outer cylinder barrel is reliably connected and sealed with the right end cover; the left end cover is sleeved on the damper piston rod, the first step of the left end cover is inserted into the left end of the inner cylinder barrel, the third step of the left end cover is inserted into the left end of the middle cylinder barrel, and meanwhile, the outermost circumference of the left end cover is inserted into the left end of the outer cylinder barrel; the left end cover and the left end of the outer cylinder barrel form reliable connection and sealing; a reliable seal is formed between the first step of the left end cover and the left end of the inner cylinder barrel; a dustproof device and a sealing device are respectively arranged on the left side of the annular oil groove of the left end cover between the left end cover and the damper piston rod, and reliable dustproof and sealing are formed between the left end cover and the damper piston rod; a guide device is arranged between the left end cover and the damper piston rod on the right side of the annular oil groove of the left end cover, reliable guide is formed between the left end cover and the damper piston rod, and gap sealing is formed between the guide device and the damper piston rod; the left pin head is reliably connected with the left end of the damper piston rod; the right inner annular groove of the right piston of the auxiliary oil tank is communicated with the right end cover oil through hole; the inner annular groove in the left side of the left piston of the auxiliary oil tank is communicated with the first oil through hole of the left end cover; a damper left working cavity A is formed between the left side of the damper piston and the left end cover, a damper left working cavity B is formed between the right side of the damper piston and the right end cover, and a return spring cavity C is formed between the auxiliary oil tank left piston and the auxiliary oil tank right piston; an auxiliary oil tank left oil chamber D is formed between the left end cover and the auxiliary oil tank left piston; an auxiliary oil tank right oil chamber E is formed between the right end cover and the auxiliary oil tank right piston; an annular oil passage F is formed between the outer wall of the middle cylinder barrel and the inner wall of the outer cylinder barrel; the left end cover annular oil groove, the left end cover first oil through hole, the auxiliary oil tank left oil chamber D, the middle cylinder barrel left oil through hole, the annular oil through passage F, the middle cylinder barrel right oil through hole, the auxiliary oil tank right oil chamber E and the right end cover oil through hole are communicated with one another; the hydraulic damper working oil is filled in the damper left working cavity A, the damper left working cavity B, the auxiliary oil tank left oil chamber D, the auxiliary oil tank right oil chamber E, the annular oil passage F and the communicated oil through holes and oil grooves through oil filling ports; and working oil in the annular oil groove of the left end cover is in a low-pressure state.
And the working oil in the auxiliary oil tank left oil chamber D and the auxiliary oil tank right oil chamber E is in a low-pressure state.
The working process is as follows:
when the damper piston rod drives the damper piston to move leftwards at a low speed, firstly, the damper piston rod drives the floating valve seat to move leftwards together, the left side of the floating valve seat covers the second oil through hole of the left end cover, and working oil in the left working cavity A of the damper cannot flow into the left oil chamber D of the auxiliary oil tank through the second oil through hole of the left end cover and the first oil through hole of the left end cover; and secondly, the first normally-open check valve of the damper piston and the second normally-open check valve of the damper piston are in normally-open states. At the moment, on one hand, working oil in the left working cavity A of the damper can flow into the left working cavity B of the damper through the first damper piston oil through hole, the first damper piston normally-open check valve, the second damper piston normally-open check valve and the second damper piston oil through hole, on the other hand, working oil in the left working cavity A of the damper can also flow into the left working cavity B of the damper through the first damper piston oil through hole, the damper piston damping hole and the second damper piston oil through hole, and meanwhile, working oil in the right oil chamber E of the auxiliary oil tank can be supplemented into the left working cavity B of the damper through the right end cover oil through hole and the right end cover normally-open check valve and the right end cover damping hole respectively;
when the damper piston rod drives the damper piston to move rightwards at a low speed, firstly, the damper piston rod drives the floating valve seat to move rightwards together, and the left side of the floating valve seat leaves the second oil through hole of the left end cover; and secondly, the first normally-open check valve of the damper piston and the second normally-open check valve of the damper piston are in normally-open states. At the moment, on one hand, the working fluid in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole of the damper piston, the second normally open check valve of the damper piston, the first normally open check valve of the damper piston and the first oil through hole of the damper piston, on the other hand, the working fluid in the left working cavity B of the damper can also flow into the left working cavity A of the damper through the second oil through hole of the damper piston, the damping hole of the damper piston and the first oil through hole of the damper piston, and the redundant working fluid in the left oil chamber D of the auxiliary oil tank can also be supplemented into the left working cavity A of the damper through the first oil through hole of the left end cover, the second oil through hole of the left end cover, the baffle ring groove and the baffle ring, meanwhile, working oil in the left working cavity B of the damper can respectively flow into the right oil chamber E of the auxiliary oil tank through the right end cover normally open check valve and the right end cover damping hole and the right end cover oil through hole;
when the damper piston rod drives the damper piston to rapidly move leftwards, firstly, the damper piston rod drives the floating valve seat to move leftwards together, the left side of the floating valve seat covers the second oil through hole of the left end cover, and working oil in the left working cavity A of the damper cannot flow into the left oil chamber D of the auxiliary oil tank through the second oil through hole of the left end cover and the first oil through hole of the left end cover; secondly, the damper piston first normally open check valve is in a locked state. At the moment, the working oil in the left working cavity A of the damper can only flow into the left working cavity B of the damper through the first oil through hole of the damper piston, the damping hole of the damper piston and the second oil through hole of the damper piston, and when the working oil flows through the damping hole of the damper piston, a damping effect is formed, so that a damping force is generated on the damper piston, and the working oil can do work outwards, consume external energy and play a role in shock absorption and shock resistance; in the process, working oil in the left working cavity A of the damper is in a high-pressure state, certain working oil leakage can be formed at the joint of the floating valve seat and the second oil through hole of the left end cover and enters the left oil chamber D of the auxiliary oil tank, and the risk of working oil leakage is reduced and the working reliability of the oil damper is improved because the working oil in the annular oil groove of the left end cover is in a lower pressure state;
when the damper piston rod drives the damper piston to rapidly move rightwards, firstly, the damper piston rod drives the floating valve seat to move rightwards together, and the left side of the floating valve seat leaves the second oil through hole of the left end cover; and secondly, the second normally-open check valve of the damper piston and the normally-open check valve of the right end cover are in a locking state. At the moment, on the one hand, the working oil in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole of the damper piston, the damping hole of the damper piston and the first oil through hole of the damper piston, on the other hand, the working oil in the left working cavity B of the damper can also flow into the right oil chamber E of the auxiliary oil tank through the damping hole of the right end cover, when the working oil flows through the damping hole of the damper piston and the damping hole of the right end cover, a damping effect is formed, damping force is generated on the damper piston, work is done outwards, external energy is consumed, a shock absorption and shock resistance effect is achieved, and meanwhile, the redundant working oil in the left oil chamber D of the auxiliary oil tank can also be supplemented into the left working cavity A of the damper through the first oil through hole of the left end cover, the second oil through hole of the left end cover, the ring.
From the working process analysis of the hydraulic damper, the pressure of the working oil in the annular oil groove of the left end cover is in a lower state, and the sealing device on the left side of the annular oil groove of the left end cover between the left end cover of the hydraulic damper and the damper piston rod is always in a low-pressure working state, so that the risk of external leakage of the working oil is reduced, and the working reliability of the oil damper is improved.
The invention has the following beneficial effects:
according to the invention, the double-layer sealing device is arranged between the piston rod and the end cover of the hydraulic damper, the oil leakage groove is formed between the two layers of sealing devices, and the oil leakage groove is led out into the low-pressure auxiliary oil tank through the related oil way, so that the external leakage risk of the hydraulic damper is greatly reduced, and the reliable work of the hydraulic damper is ensured.
Drawings
The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a hydraulic damper with external leakage service prevention function comprises a right pin head 1, a right end cover 2, an outer cylinder 3, an auxiliary oil tank right piston 4, an inner cylinder 5, a damper piston 6, a damper piston rod 7, a baffle ring 8, a floating valve seat 9, an auxiliary oil tank left piston 10, a left end cover 11, a left pin head 12, an auxiliary oil tank piston return spring 13 and a middle cylinder 14;
a right end cover first step 2-4, a right end cover second step 2-5 and a right end cover third step 2-6 are sequentially processed on the outer circumferential wall of the right end cover 2 from left to right, and a right end cover oil through hole 2-3 is radially processed at the upper part of the right end cover second step 2-5; a right end cover damping hole 2-2 is formed in the upper side of the left portion of the right end cover 2, the left end of the right end cover damping hole 2-2 penetrates through the left end face of the right end cover 2, and the right end of the right end cover damping hole 2-2 is communicated with a right end cover oil through hole 2-3; a right end cover normally-open one-way valve 2-1 is installed on the lower side of the left part of the right end cover 2, an outlet of the right end cover normally-open one-way valve 2-1 is communicated to the left end face of the right end cover 2, and an inlet of the right end cover normally-open one-way valve 2-1 is communicated with a right end cover oil through hole 2-3; an auxiliary oil tank right piston right side inner ring groove 4-1 is processed on the inner side of the right end of the auxiliary oil tank right piston 4, an auxiliary oil tank right piston right side outer ring groove 4-3 is processed on the outer side of the right end of the auxiliary oil tank right piston 4, an auxiliary oil tank right piston oil through hole 4-4 which is radially communicated is processed between the auxiliary oil tank right piston right side inner ring groove 4-1 and the auxiliary oil tank right piston right side outer ring groove 4-3, an auxiliary oil tank right piston left side ring groove 4-2 is processed on the inner side of the left end of the auxiliary oil tank right piston 4, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank right piston 4, and an auxiliary oil tank right piston inner sealing ring and an; steps are respectively processed at the left end and the right end of the damper piston 6, a first damper piston oil through hole 6-1 which is radially communicated is processed on the left step of the damper piston 6, a second damper piston oil through hole 6-4 which is radially communicated is processed on the right step of the damper piston 6, a first damper piston normally-open one-way valve 6-2 and a second damper piston normally-open one-way valve 6-3 are arranged inside the damper piston 6, the outlet of the first damper piston normally-open one-way valve 6-2 is communicated with the first damper piston oil through hole 6-1, the outlet of the second damper piston normally-open one-way valve 6-3 is communicated with the second damper piston oil through hole 6-4, and the inlet of the first damper piston normally-open one-way valve 6-2 is communicated with the inlet of the second damper piston normally-open one-way valve 6-3; a damper piston damping hole 6-5 is formed in the damper piston 6, the left end of the damper piston damping hole 6-5 is communicated with a damper piston first oil through hole 6-1, and the right end of the damper piston damping hole 6-5 is communicated with a damper piston second oil through hole 6-4; a baffle ring groove 8-1 is formed in the middle of the left side of the baffle ring 8, a baffle ring oil through hole 8-2 is formed in the right side of the baffle ring 8, and the baffle ring oil through hole 8-2 axially penetrates through the baffle ring groove 8-1 and the right end face of the baffle ring 8; a sealing ring groove 9-1 is processed in an inner hole of the floating valve seat 9, and a floating valve seat sealing ring 9-2 is installed in the sealing ring groove 9-1; an auxiliary oil tank left piston left side inner annular groove 10-1 is processed on the inner side of the left end of the auxiliary oil tank left piston 10, an auxiliary oil tank left piston left side outer annular groove 10-3 is processed on the outer side of the left end of the auxiliary oil tank left piston 10, an auxiliary oil tank left piston oil through hole 10-4 which is radially communicated is processed between the auxiliary oil tank left piston left side inner annular groove 10-1 and the auxiliary oil tank left piston left side outer annular groove 10-3, an auxiliary oil tank left piston right side annular groove 10-2 is processed on the inner side of the right end of the auxiliary oil tank left piston 10, sealing ring grooves are processed on the inner side and the outer side of the middle part of the auxiliary oil tank left piston 10, and an auxiliary oil tank left piston inner sealing ring and an auxiliary oil tank; a left end cover annular oil groove 11-1 is machined in the middle of an inner hole of the left end cover 11, a left end cover first step 11-4, a left end cover second step 11-5 and a left end cover third step 11-6 are sequentially machined on the outer circumferential wall of the left end cover 11 from right to left, a left end cover first oil through hole 11-3 is radially machined in the upper portion of the left end cover second step 11-5, the left end cover first oil through hole 11-3 is communicated with the left end cover annular oil groove 11-1, a left end cover second oil through hole 11-2 is axially machined in the right end of the left end cover 11, the left end of the left end cover second oil through hole 11-2 is communicated with the left end cover first oil through hole 11-3, and the right end of the left end cover second oil through hole 11-2 penetrates to the right end face of the left end cover 11; the right end and the left end of the middle cylinder barrel 14 are respectively provided with a middle cylinder barrel right oil through hole 14-1 and a middle cylinder barrel left oil through hole 14-2 which are radially communicated; the right pin head 1 and the right end cover 2 are reliably connected into a whole; the right end of the inner cylinder 5 is sleeved on the first step 2-4 of the right end cover, and reliable sealing is formed between the inner hole at the right end of the inner cylinder 5 and the first step 2-4 of the right end cover; a reliable connection and sealing is formed between the damper piston 6 and the damper piston rod 7; the damper piston 6 and the damper piston rod 7 are inserted into the inner cylinder 5, and reliable sealing and guiding are formed between the damper piston 6 and the inner cylinder 5; the baffle ring 8 and the floating valve seat 9 are sequentially sleeved on the damper piston rod 7 from left to right, a seal with a certain tightness is formed between the floating valve seat 9 and the damper piston rod 7, and the floating valve seat 9 is accommodated in the baffle ring groove 8-1; the auxiliary oil tank right piston 4, the auxiliary oil tank piston return spring 13 and the auxiliary oil tank left piston 10 are sequentially sleeved on the outer cylindrical wall of the inner cylinder barrel 5 from left to right, the left end of the auxiliary oil tank piston return spring 13 is installed into the auxiliary oil tank left piston right annular groove 10-2, the right end of the auxiliary oil tank piston return spring 13 is installed into the auxiliary oil tank right piston left annular groove 4-2, the left end and the right end of the auxiliary oil tank piston return spring 13 respectively abut against the auxiliary oil tank left piston 10 and the auxiliary oil tank right piston 4, and reliable sealing is formed between the auxiliary oil tank right piston 4 and the auxiliary oil tank left piston 10 and the outer cylindrical wall of the inner cylinder barrel 5; the middle cylinder barrel 14 is sequentially sleeved on the auxiliary oil tank left piston 10, the auxiliary oil tank right piston 4 and the right end cover third steps 2-6 from left to right, and reliable sealing is formed between the inner hole of the middle cylinder barrel 14 and the outer walls of the auxiliary oil tank left piston 10 and the auxiliary oil tank right piston 4 respectively; the right end of the outer cylinder barrel 3 is reliably connected and sealed with the right end cover 2; the left end cover 11 is sleeved on the damper piston rod 7, the first step 11-4 of the left end cover is inserted into the left end of the inner cylinder 5, the third step 11-6 of the left end cover is inserted into the left end of the middle cylinder 14, and meanwhile, the outermost circumference of the left end cover 11 is inserted into the left end of the outer cylinder 3; the left end cover 11 and the left end of the outer cylinder barrel 3 form reliable connection and sealing; a reliable seal is formed between the first step 11-4 of the left end cover and the left end of the inner cylinder 5; a dustproof device and a sealing device are respectively arranged on the left side of the annular oil groove 11-1 of the left end cover between the left end cover 11 and the damper piston rod 7, and reliable dustproof and sealing are formed between the left end cover 11 and the damper piston rod 7; a guide device is arranged between the left end cover 11 and the damper piston rod 7 on the right side of the annular oil groove 11-1 of the left end cover, reliable guide is formed between the left end cover 11 and the damper piston rod 7, and gap sealing is formed between the guide device and the damper piston rod 7; the left pin head 12 and the left end of the damper piston rod 7 form a reliable connection; the right inner annular groove 4-1 of the right piston of the auxiliary oil tank is communicated with the right end cover oil through hole 2-3; the left inner annular groove 10-1 of the left piston of the auxiliary oil tank is communicated with the first oil through hole 11-3 of the left end cover; a damper left working cavity A is formed between the left side of the damper piston 6 and the left end cover 11, a damper left working cavity B is formed between the right side of the damper piston 6 and the right end cover 2, and a return spring cavity C is formed between the auxiliary oil tank left piston 10 and the auxiliary oil tank right piston 4; an auxiliary oil tank left oil chamber D is formed between the left end cover 11 and the auxiliary oil tank left piston 10; an auxiliary oil tank right oil chamber E is formed between the right end cover 2 and the auxiliary oil tank right piston 4; an annular oil passage F is formed between the outer wall of the middle cylinder barrel 14 and the inner wall of the outer cylinder barrel 3; the left end cover annular oil groove 11-1, the left end cover first oil through hole 11-3, the auxiliary oil tank left oil chamber D, the middle cylinder barrel left oil through hole 14-2, the annular oil through path F, the middle cylinder barrel right oil through hole 14-1, the auxiliary oil tank right oil chamber E and the right end cover oil through hole 2-3 are communicated with each other; the hydraulic damper working oil is filled in the damper left working cavity A, the damper left working cavity B, the auxiliary oil tank left oil chamber D, the auxiliary oil tank right oil chamber E, the annular oil passage F and the communicated oil through holes and oil grooves through oil filling ports; and the working oil in the annular oil groove 11-1 of the left end cover is in a low-pressure state.
And the working oil in the auxiliary oil tank left oil chamber D and the auxiliary oil tank right oil chamber E is in a low-pressure state.
The working process is as follows:
when the damper piston rod 7 drives the damper piston 6 to move leftwards at a low speed, firstly, the damper piston rod 7 drives the floating valve seat 9 to move leftwards together, the left side of the floating valve seat 9 covers the left end cover second oil through hole 11-2, and working oil in the damper left working cavity A cannot flow into the auxiliary oil tank left oil chamber D through the left end cover second oil through hole 11-2 and the left end cover first oil through hole 11-3; and secondly, the first normally-open check valve 6-2 of the damper piston and the second normally-open check valve 6-3 of the damper piston are in a normally-open state. At the moment, on one hand, the working oil in the left working cavity A of the damper can flow into the left working cavity B of the damper through the first oil through hole 6-1 of the damper piston, the first normally open check valve 6-2 of the damper piston, the second normally open check valve 6-3 of the damper piston and the second oil through hole 6-4 of the damper piston, on the other hand, the working oil in the left working cavity A of the damper can also flow into the left working cavity B of the damper through the first oil through hole 6-1 of the damper piston, the damping hole 6-5 of the damper piston and the second oil through hole 6-4 of the damper piston, meanwhile, working oil in the right oil chamber E of the auxiliary oil tank can be supplemented into the left working cavity B of the damper through the right end cover oil through hole 2-3 and the right end cover normally open check valve 2-1 and the right end cover damping hole 2-2 respectively;
when the damper piston rod 7 drives the damper piston 6 to move rightwards at a low speed, firstly, the damper piston rod 7 drives the floating valve seat 9 to move rightwards together, and the left side of the floating valve seat 9 leaves the second oil through hole 11-2 of the left end cover; and secondly, the first normally-open check valve 6-2 of the damper piston and the second normally-open check valve 6-3 of the damper piston are in a normally-open state. At this time, on one hand, the working fluid in the left working cavity B of the damper can flow into the left working cavity A of the damper through the second oil through hole 6-4 of the damper piston, the second normally open check valve 6-3 of the damper piston, the first normally open check valve 6-2 of the damper piston and the first oil through hole 6-1 of the damper piston, on the other hand, the working fluid in the left working cavity B of the damper can also flow into the left working cavity A of the damper through the second oil through hole 6-4 of the damper piston, the damping hole 6-5 of the damper piston and the first oil through hole 6-1 of the damper piston, the redundant working fluid in the left oil chamber D of the auxiliary oil tank can also be supplemented into the left working cavity A of the damper through the first oil through hole 11-3 of the left end cover, the second oil through hole 11-2 of the left end cover, the baffle ring groove 8-1 and the baffle ring oil through hole 8, meanwhile, working oil in the left working cavity B of the damper can respectively flow into the right oil chamber E of the auxiliary oil tank through the right end cover normally open one-way valve 2-1 and the right end cover damping hole 2-2 and the right end cover oil through hole 2-3;
when the damper piston rod 7 drives the damper piston 6 to rapidly move leftwards, firstly, the damper piston rod 7 drives the floating valve seat 9 to move leftwards together, the left side of the floating valve seat 9 covers the left end cover second oil through hole 11-2, and working oil in the damper left working cavity A cannot flow into the auxiliary oil tank left oil chamber D through the left end cover second oil through hole 11-2 and the left end cover first oil through hole 11-3; secondly, the damper piston first normally open check valve 6-2 is in a locked state. At the moment, the working oil in the left working cavity A of the damper can only flow into the left working cavity B of the damper through the first oil through hole 6-1 of the damper piston, the damping hole 6-5 of the damper piston and the second oil through hole 6-4 of the damper piston, when the working oil flows through the damping hole 6-5 of the damper piston, a damping effect is formed, a damping force is generated on the damper piston 6, the external work is done outwards, the external energy is consumed, and the shock absorption and shock resistance effects are achieved, meanwhile, the working oil in the right oil chamber E of the auxiliary oil tank can be supplemented into the left working cavity B of the damper through the oil through hole 2-3 of the right end cover and through the normally open check valve 2-1 of the right end cover and the damping hole 2-2 of the right end cover respectively; in the process, working oil in the left working cavity A of the damper is in a high-pressure state, certain working oil leakage is formed at the joint of the floating valve seat 9 and the second oil through hole 11-2 of the left end cover and enters the left oil chamber D of the auxiliary oil tank, and the risk of external leakage of the working oil is reduced and the working reliability of the oil damper is improved because the working oil in the annular oil groove 11-1 of the left end cover is in a lower pressure state;
when the damper piston rod 7 drives the damper piston 6 to move rightwards rapidly, firstly, the damper piston rod 7 drives the floating valve seat 9 to move rightwards together, and the left side of the floating valve seat 9 leaves the second oil through hole 11-2 of the left end cover; and secondly, the second normally-open check valve 6-3 of the damper piston and the normally-open check valve 2-1 of the right end cover are in a locking state. At this time, on one hand, the working fluid in the left working chamber B of the damper can flow into the left working chamber A of the damper through the second oil through hole 6-4 of the damper piston, the damping hole 6-5 of the damper piston and the first oil through hole 6-1 of the damper piston, on the other hand, the working fluid in the left working chamber B of the damper can also flow into the right oil chamber E of the auxiliary oil tank through the damping hole 2-2 of the right end cover and the oil through hole 2-3 of the right end cover, when the working fluid flows through the damping hole 6-5 of the damper piston and the damping hole 2-2 of the right end cover, a damping effect is formed, a damping force is generated on the damper piston 6, work is done outwards, external energy is consumed, a shock absorption and resistance effect is achieved, and meanwhile, the redundant working fluid in the left oil chamber D of the auxiliary oil tank can also flow through the first oil through hole, The second oil through hole 11-2 of the left end cover, the baffle ring groove 8-1 and the baffle ring oil through hole 8-2 are supplemented into the left working cavity A of the damper.
From the working process analysis of the hydraulic damper, it can be seen that the pressure of the working oil in the annular oil groove 11-1 of the left end cover is in a low state, and the sealing device between the left end cover 11 of the hydraulic damper and the damper piston rod 7 and on the left side of the annular oil groove 11-1 of the left end cover is always in a low-pressure working state, so that the risk of external leakage of the working oil is reduced, and the working reliability of the oil damper is improved.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (2)

1. The utility model provides a hydraulic damper with external leakage service prevention function which characterized in that: the hydraulic cylinder comprises a right pin head (1), a right end cover (2), an outer cylinder barrel (3), an auxiliary oil tank right piston (4), an inner cylinder barrel (5), a damper piston (6), a damper piston rod (7), a baffle ring (8), a floating valve seat (9), an auxiliary oil tank left piston (10), a left end cover (11), a left pin head (12), an auxiliary oil tank piston return spring (13) and a middle cylinder barrel (14);
a right end cover first step (2-4), a right end cover second step (2-5) and a right end cover third step (2-6) are sequentially processed on the outer circumferential wall of the right end cover (2) from left to right, and a right end cover oil through hole (2-3) is radially processed at the upper part of the right end cover second step (2-5); a right end cover damping hole (2-2) is formed in the upper side of the left part of the right end cover (2), the left end of the right end cover damping hole (2-2) penetrates through the left end face of the right end cover (2), and the right end of the right end cover damping hole (2-2) is communicated with the right end cover oil through hole (2-3); a right end cover normally-open one-way valve (2-1) is installed on the lower side of the left part of the right end cover (2), an outlet of the right end cover normally-open one-way valve (2-1) is communicated to the left end face of the right end cover (2), and an inlet of the right end cover normally-open one-way valve (2-1) is communicated with the right end cover oil through hole (2-3); an auxiliary oil tank right piston right side inner annular groove (4-1) is machined on the inner side of the right end of the auxiliary oil tank right piston (4), an auxiliary oil tank right piston right side outer annular groove (4-3) is machined on the outer side of the right end of the auxiliary oil tank right piston (4), an auxiliary oil tank right piston through oil hole (4-4) which is radially communicated is machined between the auxiliary oil tank right piston right side inner annular groove (4-1) and the auxiliary oil tank right piston right side outer annular groove (4-3), an auxiliary oil tank right piston left side annular groove (4-2) is machined on the inner side of the left end of the auxiliary oil tank right piston (4), sealing ring grooves are machined on the inner side and the outer side of the middle part of the auxiliary oil tank right piston (4), and an auxiliary oil tank right piston inner sealing ring and an auxiliary oil sealing; steps are processed at the left end and the right end of the damper piston (6), a first damper piston oil through hole (6-1) which is radially communicated is processed on the left step of the damper piston (6), a second damper piston oil through hole (6-4) which is radially communicated is processed on the right step of the damper piston (6), a first damper piston normally-open one-way valve (6-2) and a second damper piston normally-open one-way valve (6-3) are installed inside the damper piston (6), an outlet of the first damper piston normally-open one-way valve (6-2) is communicated with the first damper piston oil through hole (6-1), an outlet of the second damper piston normally-open one-way valve (6-3) is communicated with the second damper piston oil through hole (6-4), and an inlet of the first damper piston normally-open one-way valve (6-2) is communicated with an inlet of the second damper piston normally-open one-way valve (6-3) Are communicated with each other; a damper piston damping hole (6-5) is formed in the damper piston (6), the left end of the damper piston damping hole (6-5) is communicated with a damper piston first oil through hole (6-1), and the right end of the damper piston damping hole (6-5) is communicated with a damper piston second oil through hole (6-4); a ring retaining groove (8-1) is formed in the middle of the left side of the retaining ring (8), a ring retaining oil through hole (8-2) is formed in the right side of the retaining ring (8), and the ring retaining oil through hole (8-2) axially penetrates through the ring retaining groove (8-1) and the right end face of the retaining ring (8); a sealing ring groove (9-1) is processed in an inner hole of the floating valve seat (9), and a floating valve seat sealing ring (9-2) is installed in the sealing ring groove (9-1); an auxiliary oil tank left piston left side inner annular groove (10-1) is machined on the inner side of the left end of an auxiliary oil tank left piston (10), an auxiliary oil tank left piston left side outer annular groove (10-3) is machined on the outer side of the left end of the auxiliary oil tank left piston (10), an auxiliary oil tank left piston through oil hole (10-4) which is radially communicated is machined between the auxiliary oil tank left piston left side inner annular groove (10-1) and the auxiliary oil tank left piston left side outer annular groove (10-3), an auxiliary oil tank left piston right side annular groove (10-2) is machined on the inner side of the right end of the auxiliary oil tank left piston (10), sealing ring grooves are machined on the inner side and the outer side of the middle part of the auxiliary oil tank left piston (10), and an auxiliary oil tank left piston inner sealing ring and an auxiliary oil tank outer; a left end cover annular oil groove (11-1) is processed in the middle of an inner hole of the left end cover (11), a first step (11-4) of the left end cover, a second step (11-5) of the left end cover and a third step (11-6) of the left end cover are sequentially processed on the outer circumferential wall of the left end cover (11) from right to left, a first oil through hole (11-3) of the left end cover is radially processed at the upper part of the second step (11-5) of the left end cover, the first oil through hole (11-3) of the left end cover is communicated with the annular oil groove (11-1) of the left end cover, a left end cover second oil through hole (11-2) is axially processed at the right end of the left end cover (11), the left end of the left end cover second oil through hole (11-2) is communicated with the left end cover first oil through hole (11-3), and the right end of the left end cover second oil through hole (11-2) penetrates through the right end face of the left end cover (11); the right end and the left end of the middle cylinder barrel (14) are respectively provided with a middle cylinder barrel right oil through hole (14-1) and a middle cylinder barrel left oil through hole (14-2) which are radially communicated; the right pin head (1) and the right end cover (2) are reliably connected into a whole; the right end of the inner cylinder barrel (5) is sleeved on the first step (2-4) of the right end cover, and reliable sealing is formed between the inner hole of the right end of the inner cylinder barrel (5) and the first step (2-4) of the right end cover; the damper piston (6) and the damper piston rod (7) form reliable connection and sealing; the damper piston (6) and the damper piston rod (7) are inserted into the inner cylinder (5), and reliable sealing and guiding are formed between the damper piston (6) and the inner cylinder (5); the baffle ring (8) and the floating valve seat (9) are sequentially sleeved on the damper piston rod (7) from left to right, a seal with a certain tightness is formed between the floating valve seat (9) and the damper piston rod (7), and the floating valve seat (9) is accommodated in the baffle ring groove (8-1); the auxiliary oil tank right piston (4), the auxiliary oil tank piston reset spring (13) and the auxiliary oil tank left piston (10) are sequentially sleeved on the outer cylindrical wall of the inner cylinder barrel (5) from left to right, the left end of the auxiliary oil tank piston reset spring (13) is installed into an auxiliary oil tank left piston right annular groove (10-2), the right end of the auxiliary oil tank piston reset spring (13) is installed into an auxiliary oil tank right piston left annular groove (4-2), the left end and the right end of the auxiliary oil tank piston reset spring (13) respectively abut against the auxiliary oil tank left piston (10) and the auxiliary oil tank right piston (4), and reliable sealing is formed between the auxiliary oil tank right piston (4), the auxiliary oil tank left piston (10) and the outer cylindrical wall of the inner cylinder barrel (5); the middle cylinder barrel (14) is sequentially sleeved on the auxiliary oil tank left piston (10), the auxiliary oil tank right piston (4) and the right end cover third step (2-6) from left to right, and reliable sealing is formed between the inner hole of the middle cylinder barrel (14) and the outer walls of the auxiliary oil tank left piston (10) and the auxiliary oil tank right piston (4) respectively; the right end of the outer cylinder barrel (3) is reliably connected and sealed with the right end cover (2); the left end cover (11) is sleeved on the damper piston rod (7), the first step (11-4) of the left end cover is inserted into the left end of the inner cylinder barrel (5), the third step (11-6) of the left end cover is inserted into the left end of the middle cylinder barrel (14), and meanwhile, the outermost circumference of the left end cover (11) is inserted into the left end of the outer cylinder barrel (3); the left end cover (11) and the left end of the outer cylinder barrel (3) form reliable connection and sealing; a reliable seal is formed between the first step (11-4) of the left end cover and the left end of the inner cylinder barrel (5); a dustproof device and a sealing device are respectively arranged on the left side of the annular oil groove (11-1) of the left end cover between the left end cover (11) and the damper piston rod (7), and reliable dustproof and sealing are formed between the left end cover (11) and the damper piston rod (7); a guide device is arranged between the left end cover (11) and the damper piston rod (7) on the right side of the annular oil groove (11-1) of the left end cover, reliable guide is formed between the left end cover (11) and the damper piston rod (7), and gap sealing is formed between the guide device and the damper piston rod (7); the left pin head (12) is reliably connected with the left end of the damper piston rod (7); the right inner annular groove (4-1) of the right piston of the auxiliary oil tank is communicated with the right end cover oil through hole (2-3); the left inner annular groove (10-1) of the left piston of the auxiliary oil tank is communicated with the first oil through hole (11-3) of the left end cover; a damper left working cavity A is formed between the left side of the damper piston (6) and the left end cover (11), a damper left working cavity B is formed between the right side of the damper piston (6) and the right end cover (2), and a return spring cavity C is formed between the auxiliary oil tank left piston (10) and the auxiliary oil tank right piston (4); an auxiliary oil tank left oil chamber D is formed between the left end cover (11) and the auxiliary oil tank left piston (10); an auxiliary oil tank right oil chamber E is formed between the right end cover (2) and the auxiliary oil tank right piston (4); an annular oil through passage F is formed between the outer wall of the middle cylinder barrel (14) and the inner wall of the outer cylinder barrel (3); the left end cover annular oil groove (11-1), the left end cover first oil through hole (11-3), the auxiliary oil tank left oil chamber D, the middle cylinder barrel left oil through hole (14-2), the annular oil through path F, the middle cylinder barrel right oil through hole (14-1), the auxiliary oil tank right oil chamber E and the right end cover oil through hole (2-3) are communicated with each other; the hydraulic damper working oil is filled in the damper left working cavity A, the damper left working cavity B, the auxiliary oil tank left oil chamber D, the auxiliary oil tank right oil chamber E, the annular oil passage F and the communicated oil through holes and oil grooves through oil filling ports; and working oil in the annular oil groove (11-1) of the left end cover is in a low-pressure state.
2. The hydraulic damper with external leakage service prevention function according to claim 1, characterized in that: and working oil in the auxiliary oil tank left oil chamber D and the auxiliary oil tank right oil chamber E is in a low-pressure state.
CN202010617851.6A 2020-06-30 2020-06-30 Hydraulic damper with external leakage service prevention function Withdrawn CN111895022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010617851.6A CN111895022A (en) 2020-06-30 2020-06-30 Hydraulic damper with external leakage service prevention function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010617851.6A CN111895022A (en) 2020-06-30 2020-06-30 Hydraulic damper with external leakage service prevention function

Publications (1)

Publication Number Publication Date
CN111895022A true CN111895022A (en) 2020-11-06

Family

ID=73191117

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010617851.6A Withdrawn CN111895022A (en) 2020-06-30 2020-06-30 Hydraulic damper with external leakage service prevention function

Country Status (1)

Country Link
CN (1) CN111895022A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000320599A (en) * 1999-05-07 2000-11-24 Kayaba Ind Co Ltd Damping force generation structure of hydraulic damper
KR20110129023A (en) * 2010-05-25 2011-12-01 주식회사 만도 Sealing unit for a shock absorber
CN103527697A (en) * 2013-11-01 2014-01-22 武汉天捷重型装备股份有限公司 Hydro-pneumatic spring suspension cylinder
CN108533659A (en) * 2018-05-11 2018-09-14 南京林业大学 A kind of mechanical automatic adjustment pressure fluid linking damper
CN108953461A (en) * 2018-07-12 2018-12-07 河海大学常州校区 A kind of in-line arrangement hydraulic damper
CN109340295A (en) * 2018-12-12 2019-02-15 河海大学常州校区 A kind of hydraulic damper of the auxiliary fuel tank with air bag

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000320599A (en) * 1999-05-07 2000-11-24 Kayaba Ind Co Ltd Damping force generation structure of hydraulic damper
KR20110129023A (en) * 2010-05-25 2011-12-01 주식회사 만도 Sealing unit for a shock absorber
CN103527697A (en) * 2013-11-01 2014-01-22 武汉天捷重型装备股份有限公司 Hydro-pneumatic spring suspension cylinder
CN108533659A (en) * 2018-05-11 2018-09-14 南京林业大学 A kind of mechanical automatic adjustment pressure fluid linking damper
CN108953461A (en) * 2018-07-12 2018-12-07 河海大学常州校区 A kind of in-line arrangement hydraulic damper
CN109340295A (en) * 2018-12-12 2019-02-15 河海大学常州校区 A kind of hydraulic damper of the auxiliary fuel tank with air bag

Similar Documents

Publication Publication Date Title
CN108953461B (en) In-line hydraulic damper
CN101893010B (en) Hydraulic balanced valve
CN108506403B (en) Large-scale hydraulic damper
CN102086938B (en) Reducing valve
CN101435446A (en) Balance valve
CN101949397A (en) Balanced valve bank of derricking cylinder system
CN204226320U (en) Equilibrium valve and truck crane
CN202381448U (en) Hydraulic oil cylinder and hydraulic system
CN201428668Y (en) Balance valve with secondary pressure overflow
CN201232784Y (en) Load holding valve
CN111895022A (en) Hydraulic damper with external leakage service prevention function
CN201461569U (en) Hydraulic balance valve
CN106870499B (en) A kind of damping buffering valve
CN111895023A (en) Hydraulic damper with external leakage service prevention function
CN111895026A (en) Hydraulic damper with external leakage service prevention function
CN111895019A (en) Hydraulic damper with external leakage service prevention function
CN111895024A (en) Hydraulic damper with external leakage service prevention function
CN111895020A (en) Hydraulic damper with external leakage service prevention function
CN101929491B (en) Balance valve with secondary pressure overflow
CN111895021A (en) Hydraulic damper with external leakage service prevention function
CN111895025A (en) Hydraulic damper with external leakage service prevention function
CN2751169Y (en) Hydraulic controlled reversing valve
CN108589832A (en) Pressure limiting valve applied to water supply pipe
CN212226118U (en) Minimum flow valve
CN201610872U (en) Pressure tracing valve

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20201106