CN205544801U - Piston type protector - Google Patents
Piston type protector Download PDFInfo
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- CN205544801U CN205544801U CN201620020541.5U CN201620020541U CN205544801U CN 205544801 U CN205544801 U CN 205544801U CN 201620020541 U CN201620020541 U CN 201620020541U CN 205544801 U CN205544801 U CN 205544801U
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- piston
- chamber
- housing
- piston rod
- bearing
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Abstract
The utility model discloses a piston type protector belongs to drilling tool motor technical field, including the support of casing with the inside medium chamber of connection, the support is fixed on the casing, its characterized in that: still including fixing the piston rod on the support, the piston rod is located the casing, between piston rod and the casing through the sealing washer be connected with first piston and with the communicating second piston of outside medium chamber, first piston, second piston, casing and piston rod enclose into the adapter cavity, first piston, casing, piston rod and support enclose into the thin oil chamber, it has the oil through to open on the support, and the oil through communicates with thin oil chamber and inside medium chamber respectively. The utility model discloses a double -piston structure has realized internal -external differential pressure's self -balancing, and has effectively reduced the pressure fluctuation in the whole protector working process, has improved the operational reliability to can the long -time normal stable operation of ensured motor.
Description
Technical field
This utility model relates to down-hole equipment technical field of motors, particularly relates to a kind of down-hole equipment motor of being applicable to
Piston type protector.
Background technology
Motor is in when underground work under high temperature and high pressure environment, and high temperature makes motor internal media expansion, and outside motor
The environment under high pressure in portion also makes the inside and outside portion of motor produce depositing of the biggest pressure reduction, the expansion of interior media and the huge pressure reduction in inside and outside
Seal making motor to realize, the most also the structure member of motor can be produced huge destruction.Therefore, in underground work
Motor usually can arrange protector, and the Main Function of protector is exactly the internal pressure with outside motor of balance motor, makes motor
Inside and outside portion pressure reduction diminishes or there is not pressure reduction.
Publication No. CN 201726224U, publication date is that the Chinese patent literature of on 01 26th, 2011 discloses one
Metal bellow type high-temperature motor protector, including top connection, lower contact, lower contact is arranged above thrust shaft block, thrust
Bearing block is arranged above thrust bearing, has transition joint, transition joint to be arranged above metal bellows above thrust bearing
Shoe cream room, it is characterised in that: described metal bellows shoe cream room includes protecting central siphon, protects central siphon bottom thread and connects that to protect central siphon short
Joint, protect have on central siphon pipe nipple make to protect central siphon in the oblique through hole that is interlinked to the outside, protect and be fixed with in the convex annular of central siphon pipe nipple excircle
Big corrugated tube, big corrugated tube is fixedly arranged above relative to protecting the cover plate that central siphon can slide, and cover plate upper surface is fixed with ripplet
Pipe, small corrugated pipe is fixedly arranged above positioning sleeve, and positioning sleeve is enclosed within the upper end protecting central siphon, big corrugated tube and small corrugated pipe and protects central siphon
Between ring cavity be shoe cream room.
Metal bellow type high-temperature motor protector disclosed in this patent documentation, big corrugated tube is fixed on and protects outside central siphon pipe nipple
In the convex annular of circumference, big corrugated tube cover plate fixed above, cover plate upper surface fixes small corrugated pipe, and this structure, in its balance
External differential is to promote cover plate to realize by big corrugated tube, and the effect of small corrugated pipe is fairly limited, is in high temperature for a long time due to motor
In environment under high pressure, after using a period of time, easily produce gap between big corrugated tube and cover plate, cause inside and outside differential pressure to be difficult to
Self-balancing, causes protector to lose protective effect, affects the properly functioning of motor.
Publication No. CN 203488422U, publication date is that the Chinese patent literature of on 03 19th, 2014 discloses one
Self-action exempts from oiling submersible electric motor protector, including being positioned at the lower contact that protector lower end is connected with submersible electric machine with oil, it is characterized in that:
Having fixing baffle plate on center shaft in lower contact inner chamber, baffle plate bottom connects piston by spring, piston is fixed with O ring,
Ball-and-seat is arranged at the axis hole oil circuit bottom of lower contact.
Self-action disclosed in this patent documentation exempts from oiling submersible electric motor protector, owing to structure design is unreasonable, especially
Connecting the spring of piston, after life-time service, elastic force declines, and piston is difficult under the action of the spring by O ring seal annular space oil
Road, and external agency the most directly contacts O ring, causes O ring to damage, causes inside and outside differential pressure to be difficult to self-balancing, and then make guarantor
Protect device and lose protective effect, affect the properly functioning of motor.
Utility model content
This utility model is in order to overcome the defect of above-mentioned prior art, it is provided that a kind of piston type protector, this utility model
Pass through dual-piston structure, it is achieved that the self-balancing of inside and outside differential pressure, and effectively reduce the pressure in whole protector work process
Pulsation, improves functional reliability such that it is able to ensure the operation of the long-time normal table of motor.
This utility model is achieved through the following technical solutions:
A kind of piston type protector, including housing and the bearing in connection interior media chamber, bearing is fixed on housing, and it is special
Levying and be: also include the piston rod being fixed on bearing, piston rod is positioned at housing, by close between described piston rod and housing
Seal connects first piston and the second piston communicated with external agency chamber, described first piston, the second piston, housing and work
Stopper rod surrounds adapter cavity, and described first piston, housing, piston rod and bearing surround thin oil chamber, and described bearing has oil through,
Oil through connects with thin oil chamber and interior media chamber respectively.
Described adapter cavity is built with flexible member.
Described flexible member is spring, and one end of spring is connected with first piston, and the other end of spring and the second piston are even
Connect.
Described flexible member is gas, and gas is full of adapter cavity.
Described flexible member is spring and gas.
Have outer ring seal oils and fats chamber between described second piston and housing, between the second piston and piston rod, have internal ring
Seal grease chamber.
The outer ring anti-soil ring contacted with external agency chamber, outer ring anti-soil ring set it is provided with between described second piston and housing
On the second piston, between the second piston and piston rod, it is provided with the inner ring anti-soil ring contacted with external agency chamber, inner ring anti-soil
Ring set is on the piston rod.
Described piston rod be internally provided with flowing lumen, flowing lumen connects with external agency chamber and interior media chamber respectively.
Described housing and bearing are threaded connection or Flange joint.
Being cased with O ring on described bearing, bearing is connected by flange is fixing with housing.
Operation principle of the present utility model is as follows:
Motor is during going into the well, along with the rising of external agency pressure and temperature, due to the increasing of external agency cavity pressure
Adding and the high compressibility of flexible member in adapter cavity, the second piston will move to the right, be entered by oil through meanwhile
The oil of thin oil intracavity, owing to having thermal expansivity, moves to the left by promotion first piston, makes external agency chamber, adapter cavity, dilute
The pressure in oil pocket and interior media chamber reaches autobalance, it is achieved the pressure compensation of motor is protected by protector.
Motor is during going out well, and along with the reduction of external agency pressure and temperature, the gas in adapter cavity will be the most swollen
Swollen, the oil volume of thin oil intracavity also can reduce simultaneously, and now the volume of adapter cavity is continuously increased, and makes the second piston the most to the left
Mobile, first piston moves the most to the right, it is achieved the pressure in external agency chamber, adapter cavity, thin oil chamber and interior media chamber is put down
Weighing, the external agency on the second piston is also gradually released, and the pollutant of shell inner surface and piston rod surface are also resisted by outer ring
Dirty ring and inner ring anti-soil ring are scraped and are wiped clean, and effectively prevent pollutant from sealing ring is caused damage.
The beneficial effects of the utility model are mainly manifested in the following aspects:
One, this utility model, piston rod is positioned at housing, is connected by sealing ring and has first to live between piston rod with housing
Plug and the second piston of communicating with external agency chamber, first piston, the second piston, housing and piston rod surround adapter cavity, and first
Piston, housing, piston rod and bearing surround thin oil chamber, and bearing has oil through, and oil through is situated between with thin oil chamber and inside respectively
Matter chamber connects, and forms dual-piston structure, along with the rising of external agency pressure and temperature, due to the increasing of external agency cavity pressure
Adding, the second piston will move to the right, meanwhile, be entered the oil of thin oil intracavity by oil through, owing to having thermal expansivity, will push away
Dynamic first piston moves to the left, makes the pressure in external agency chamber, adapter cavity, thin oil chamber and interior media chamber reach the most flat
Weighing apparatus, it is achieved the pressure compensation of motor is protected, as a complete technical scheme, by dual-piston structure, effectively by protector
Reduce the pressure fluctuation in whole protector work process, improve functional reliability such that it is able to ensure that motor is long-time
The operation of normal table.
Two, this utility model, adapter cavity has high compressibility built with flexible member, flexible member, when outside is situated between
When matter pressure and temperature constantly raises, external agency cavity pressure increases therewith, and the second piston will move to the right；Due to thin oil chamber
The thermal expansivity of interior oil and the high compressibility of flexible member, it is possible to quickly promote first piston to move to the left, outside making
The pressure in portion's dielectric cavity, adapter cavity, thin oil chamber and interior media chamber reaches self-balancing, thus protects motor properly functioning.
Three, this utility model, flexible member is spring, and one end of spring is connected with first piston, the other end of spring with
Second piston connects, and spring has good elastic acting force, under pressure, it is possible to easily promote first piston and second
Piston produces in opposite directions or reverse motions, it is simple to realize pressure balance.
Four, this utility model, flexible member is gas, and gas is full of adapter cavity, owing to gas can fill whole transition
Chamber, in whole adapter cavity, gas density uniformity is good, acts on the power on first piston and the second piston more uniform such that it is able to
Stable realizes pressure self-balancing.
Five, this utility model, flexible member is spring and gas, by using spring and gas jointly to coordinate, possesses height
Degree compressibility, greatly improves the speed realizing pressure self-balancing, effectively reduces in whole protector work process
Pressure fluctuation, improves functional reliability.
Six, this utility model, has an outer ring seal oils and fats chamber between the second piston and housing, the second piston and piston rod it
Between have inner ring seal oils and fats chamber, it is possible to effectively prevent the particulate matter in external agency from directly contacting first piston, the second piston
And the sealing ring on piston rod, protection sealing ring is without damage, thus ensures that pressure self-balancing can well realize.
Seven, this utility model, is provided with the outer ring anti-soil ring contacted with external agency chamber, outward between the second piston and housing
Circle anti-soil ring set, on the second piston, is provided with the inner ring anti-soil contacted with external agency chamber between the second piston and piston rod
Ring, on the piston rod, inner ring anti-soil ring and outer ring anti-soil ring have good wearability to inner ring anti-soil ring set, depart from height at motor
During temperature, environment under high pressure, it is possible to effectively remove inner walls and piston rod surface pollutant, effectively prevent in external agency
Pollutant sealing ring is caused damage.
Eight, this utility model, piston rod be internally provided with flowing lumen, flowing lumen respectively with external agency chamber and internal be situated between
Matter chamber connects, and external agency can be communicated with the interior media in interior media chamber by flowing lumen, it is possible to prevent interior external pressure anxious
Acute expansion, protection sealing ring is injury-free, extends the service life of sealing ring.
Nine, this utility model, housing and bearing are threaded connection or Flange joint, can not only make housing and bearing jail
Solid connection, and dismounting and change is the most convenient.
Ten, this utility model, bearing is cased with O ring, and bearing is connected, by setting on bearing by flange is fixing with housing
Put O ring, it is possible to make linking together of bearing and housing more close and firm.
Accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, this utility model is described in further detail, its
In:
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of this utility model embodiment 2；
Fig. 3 is the structural representation of this utility model embodiment 3；
Fig. 4 is the structural representation of this utility model embodiment 4；
Fig. 5 is the structural representation of this utility model embodiment 5；
Fig. 6 is the structural representation of this utility model embodiment 6；
Labelling in figure: 1, housing, 2, interior media chamber, 3, bearing, 4, piston rod, 5, first piston, 6, external agency chamber,
7, the second piston, 8, adapter cavity, 9, thin oil chamber, 10, oil through, 11, flexible member, 12, outer ring seal oils and fats chamber, 13, internal ring
Seal grease chamber, 14, outer ring anti-soil ring, 15, inner ring anti-soil ring, 16, flowing lumen, 17, O ring.
Detailed description of the invention
Embodiment 1
Seeing Fig. 1, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
The present embodiment is most basic embodiment, and piston rod is positioned at housing, by sealing between piston rod and housing
Circle connects first piston and the second piston communicated with external agency chamber, and first piston, the second piston, housing and piston rod enclose
Becoming adapter cavity, first piston, housing, piston rod and bearing surround thin oil chamber, bearing have oil through, and oil through is respectively with dilute
Oil pocket connects with interior media chamber, forms dual-piston structure, along with the rising of external agency pressure and temperature, due to external agency
The increase of cavity pressure, the second piston will move to the right, meanwhile, be entered the oil of thin oil intracavity by oil through, owing to having heat
Dilatancy, moves to the left by promotion first piston, makes external agency chamber, adapter cavity, thin oil chamber and the pressure in interior media chamber
Reach autobalance, it is achieved the pressure compensation of motor is protected by protector, as a complete technical scheme, passes through double-piston
Structure, effectively reduces the pressure fluctuation in whole protector work process, improves functional reliability such that it is able to ensure electricity
The operation of captain's time normal table.
Embodiment 2
Seeing Fig. 2, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
Described adapter cavity 8 is built with flexible member 11.
Described flexible member 11 is spring, and one end of spring is connected with first piston 5, the other end of spring and the second piston
7 connect.
The present embodiment is a better embodiment, and adapter cavity has the most compressible built with flexible member, flexible member
Property, when external agency pressure and temperature constantly raises, external agency cavity pressure increases therewith, and the second piston is by sidesway to the right
Dynamic；Thermal expansivity and the high compressibility of flexible member due to thin oil intracavity oil, it is possible to quickly promote first piston to
Left side is mobile, makes the pressure in external agency chamber, adapter cavity, thin oil chamber and interior media chamber reach self-balancing, thus protects motor
Properly functioning.Flexible member is spring, and one end of spring is connected with first piston, and the other end of spring and the second piston connect,
Spring has good elastic acting force, under pressure, it is possible to easily promote first piston and the second piston to produce in opposite directions
Or reverse motions, it is simple to realize pressure balance.
Embodiment 3
Seeing Fig. 3, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
Described adapter cavity 8 is built with flexible member 11.
Described flexible member 11 is gas, and gas is full of adapter cavity 8.
The present embodiment is another better embodiment, and flexible member is gas, and gas is full of adapter cavity, owing to gas can
Filling whole adapter cavity, in whole adapter cavity, gas density uniformity is good, acts on the power on first piston and the second piston relatively
Uniformly such that it is able to stable realizes pressure self-balancing.
Embodiment 4
Seeing Fig. 4, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
Described adapter cavity 8 is built with flexible member 11.
Described flexible member 11 is spring and gas.
The present embodiment is another better embodiment, and flexible member is spring and gas, by using spring and gas altogether
With coordinating, possess high compressibility, greatly improve the speed realizing pressure self-balancing, effectively reduce whole protector
Pressure fluctuation in work process, improves functional reliability.
Embodiment 5
Seeing Fig. 5, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
Described adapter cavity 8 is built with flexible member 11.
Described flexible member 11 is spring and gas.
Have outer ring seal oils and fats chamber 12 between described second piston 7 and housing 1, open between the second piston 7 and piston rod 4
There is inner ring seal oils and fats chamber 13.
The present embodiment is another better embodiment, has outer ring seal oils and fats chamber between the second piston and housing, second
Inner ring seal oils and fats chamber is had, it is possible to effectively prevent the particulate matter in external agency from directly contacting first between piston and piston rod
Sealing ring on piston, the second piston and piston rod, protection sealing ring is without damage, thus ensures that pressure self-balancing can be good
Good realization.
Embodiment 6
Seeing Fig. 6, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
Described adapter cavity 8 is built with flexible member 11.
Described flexible member 11 is spring and gas.
Have outer ring seal oils and fats chamber 12 between described second piston 7 and housing 1, open between the second piston 7 and piston rod 4
There is inner ring seal oils and fats chamber 13.
Being provided with the outer ring anti-soil ring 14 contacted with external agency chamber 6 between described second piston 7 and housing 1, outer ring resists
Dirty ring 14 is enclosed within the second piston 7, is provided with the inner ring anti-soil contacted with external agency chamber 6 between the second piston 7 and piston rod 4
Ring 15, inner ring anti-soil ring 15 is enclosed within piston rod 4.
Described piston rod 4 be internally provided with flowing lumen 16, flowing lumen 16 respectively with external agency chamber 6 and interior media chamber
2 connections.
Described housing 1 is threaded connection with bearing 3.
The present embodiment is another better embodiment, is provided with and contacts with external agency chamber between the second piston and housing
Outer ring anti-soil ring, outer ring anti-soil ring set, on the second piston, is provided with between the second piston and piston rod and connects with external agency chamber
The inner ring anti-soil ring touched, on the piston rod, inner ring anti-soil ring and outer ring anti-soil ring have good wearability to inner ring anti-soil ring set,
During motor departs from high temperature, environment under high pressure, it is possible to effectively remove inner walls and piston rod surface pollutant, the most anti-
Only sealing ring is caused damage by the pollutant in external agency.Piston rod be internally provided with flowing lumen, flowing lumen is respectively with outward
Portion's dielectric cavity connects with interior media chamber, and external agency can be communicated with the interior media in interior media chamber by flowing lumen,
Being prevented from interior external pressure drastically to expand, protection sealing ring is injury-free, extends the service life of sealing ring.Housing passes through with bearing
Threaded, housing can not only be made firmly to be connected with bearing, and dismounting and change is the most convenient.
Embodiment 7
Seeing Fig. 6, a kind of piston type protector, including housing 1 and the bearing 3 in connection interior media chamber 2, bearing 3 is fixed
On housing 1, also including the piston rod 4 being fixed on bearing 3, piston rod 4 is positioned at housing 1, described piston rod 4 and housing 1
Between connected by sealing ring and to have first piston 5 and the second piston 7 communicated with external agency chamber 6, described first piston 5, the
Two pistons 7, housing 1 and piston rod 4 surround adapter cavity 8, and described first piston 5, housing 1, piston rod 4 and bearing 3 surround thin oil
Chamber 9, described bearing 3 has oil through 10, and oil through 10 connects with thin oil chamber 9 and interior media chamber 2 respectively.
Described adapter cavity 8 is built with flexible member 11.
Described flexible member 11 is spring and gas.
Have outer ring seal oils and fats chamber 12 between described second piston 7 and housing 1, open between the second piston 7 and piston rod 4
There is inner ring seal oils and fats chamber 13.
Being provided with the outer ring anti-soil ring 14 contacted with external agency chamber 6 between described second piston 7 and housing 1, outer ring resists
Dirty ring 14 is enclosed within the second piston 7, is provided with the inner ring anti-soil contacted with external agency chamber 6 between the second piston 7 and piston rod 4
Ring 15, inner ring anti-soil ring 15 is enclosed within piston rod 4.
Described piston rod 4 be internally provided with flowing lumen 16, flowing lumen 16 respectively with external agency chamber 6 and interior media chamber
2 connections.
Being cased with O ring 17 on described bearing 3, bearing 3 is connected by flange is fixing with housing 1.
The present embodiment is preferred forms, and piston rod is positioned at housing, between piston rod and housing by sealing ring even
Being connected to first piston and the second piston communicated with external agency chamber, first piston, the second piston, housing and piston rod surrounded
Crossing chamber, first piston, housing, piston rod and bearing surround thin oil chamber, and bearing has oil through, oil through respectively with thin oil chamber
Connect with interior media chamber, form dual-piston structure, along with the rising of external agency pressure and temperature, owing to external agency chamber is pressed
The increase of power, the second piston will move to the right, meanwhile, be entered the oil of thin oil intracavity by oil through, owing to having thermal expansion
Property, promotion first piston is moved to the left, makes the pressure in external agency chamber, adapter cavity, thin oil chamber and interior media chamber reach
Autobalance, it is achieved the pressure compensation of motor is protected by protector, as a complete technical scheme, is tied by double-piston
Structure, effectively reduces the pressure fluctuation in whole protector work process, improves functional reliability such that it is able to ensure motor
The operation of long-time normal table.Being cased with O ring on bearing, bearing is connected, by setting on bearing by flange is fixing with housing
Put O ring, it is possible to make linking together of bearing and housing more close and firm.
Claims (7)
1. a piston type protector, including housing (1) and the bearing (3) of connection interior media chamber (2), bearing (3) is fixed on
On housing (1), it is characterised in that: also including the piston rod (4) being fixed on bearing (3), piston rod (4) is positioned at housing (1),
It is connected by sealing ring between described piston rod (4) with housing (1) and has first piston (5) and communicate with external agency chamber (6)
Second piston (7), described first piston (5), the second piston (7), housing (1) and piston rod (4) surround adapter cavity (8), described
First piston (5), housing (1), piston rod (4) and bearing (3) surround thin oil chamber (9), and described bearing has oil through on (3)
(10), oil through (10) connects with thin oil chamber (9) and interior media chamber (2) respectively.
A kind of piston type protector the most according to claim 1, it is characterised in that: described adapter cavity (8) is built with elasticity
Element (11).
A kind of piston type protector the most according to claim 2, it is characterised in that: described flexible member (11) is spring,
One end of spring is connected with first piston (5), and the other end of spring and the second piston (7) connect.
A kind of piston type protector the most according to claim 2, it is characterised in that: described flexible member (11) is gas,
Gas is full of adapter cavity (8).
A kind of piston type protector the most according to claim 2, it is characterised in that: described flexible member (11) be spring and
Gas.
A kind of piston type protector the most according to claim 2, it is characterised in that: described second piston (7) and housing (1)
Between have outer ring seal oils and fats chamber (12), have inner ring seal oils and fats chamber (13) between the second piston (7) and piston rod (4).
A kind of piston type protector the most according to claim 6, it is characterised in that: described second piston (7) and housing (1)
Between be provided with outer ring anti-soil ring (14) contacted with external agency chamber (6), outer ring anti-soil ring (14) is enclosed within the second piston (7)
On, it being provided with inner ring anti-soil ring (15) contacted with external agency chamber (6) between the second piston (7) with piston rod (4), inner ring resists
Dirty ring (15) is enclosed within piston rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620020541.5U CN205544801U (en) | 2016-01-11 | 2016-01-11 | Piston type protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620020541.5U CN205544801U (en) | 2016-01-11 | 2016-01-11 | Piston type protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544801U true CN205544801U (en) | 2016-08-31 |
Family
ID=56764374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620020541.5U Withdrawn - After Issue CN205544801U (en) | 2016-01-11 | 2016-01-11 | Piston type protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515284A (en) * | 2016-01-11 | 2016-04-20 | 东方电气集团东方电机有限公司 | Piston type protector |
-
2016
- 2016-01-11 CN CN201620020541.5U patent/CN205544801U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515284A (en) * | 2016-01-11 | 2016-04-20 | 东方电气集团东方电机有限公司 | Piston type protector |
| CN105515284B (en) * | 2016-01-11 | 2018-05-04 | 东方电气集团东方电机有限公司 | A kind of piston type protector |
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