CN108105388A - For the improved seal structure of hydraulic motor - Google Patents
For the improved seal structure of hydraulic motor Download PDFInfo
- Publication number
- CN108105388A CN108105388A CN201810034536.3A CN201810034536A CN108105388A CN 108105388 A CN108105388 A CN 108105388A CN 201810034536 A CN201810034536 A CN 201810034536A CN 108105388 A CN108105388 A CN 108105388A
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- Prior art keywords
- motor
- ring
- flange
- sealing ring
- storage tank
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- 238000007789 sealing Methods 0.000 claims description 89
- 238000007667 floating Methods 0.000 claims description 74
- 239000004519 grease Substances 0.000 claims description 16
- 239000010426 asphalt Substances 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Motors (AREA)
Abstract
A kind of improved seal structure for hydraulic motor, including the first seal assembly and the second seal assembly, hydraulic motor includes motor dead axle and motor lower housing, motor bearing is equipped between the two, the motor bearing inner ring of the motor bearing is resisted against motor dead axle and extends outward from motor bearing, the outer end of the motor dead axle is fixed with end cap flange, the diameter of the end cap flange is more than motor dead axle to be covered in the outside of motor lower housing, first seal assembly includes at least two-way lip combined seal ring, the inner edge of the two-way lip combined seal ring is in close contact with motor bearing inner ring, outer rim is in close contact with motor lower housing, second seal assembly is arranged between end cap flange and motor lower housing；The configuration of the present invention is simple as a result, it is easy to loading and unloading, it can guarantee the reliability sealed under the larger operating mode of depth of mud, and can easily be replaced, and then bring from cost and in terms of the duration enormous benefits.
Description
Technical field
The present invention relates to motor sealing technical field more particularly to it is a kind of work under mud for hydraulic motor
Improved seal structure.
Background technology
With the development of Modern Construction Technology and construction, people propose higher requirement to Traditional project machinery,
A batch continues to bring out for the engineering machinery of special operation condition.Present document relates to
Hydraulic motor is applied to a kind of engineering equipment that can carry out Rock Cutting under hundreds of meters of operating mode under mud.Liquid
Hydraulic energy transfer is the critical piece that cutting wheel is driven to cut rock, to whole equipment into mechanical energy by pressure motor
Normal operation is most important.When equipment is run, motor is completely submerged in mud, with the not only increase of immersion depth, motor
The static pressure from mud that outside is born can be higher and higher, and this operating mode proposes higher to the voltage endurance capability of motor seal
Requirement, once motor seal goes wrong, then mud will enter motor shell, so as to pollute entire hydraulic system, give
Whole equipment belt carrys out destructive destruction.
As shown in Figs. 1-3, it is shown that on the motor of the sealing structure of hydraulic motor in the prior art, the wherein hydraulic motor
Housing 201 is attached by connecting bolt 202 with motor lower housing 203, and a motor dead axle 204 is arranged in hydraulic motor,
Sealing structure therein includes (as shown in Figure 2) clamp spring a101, bearing outer ring 102, bearing roller 103, reinforced seal
104th, clamp spring b105, dustband 106 and bearing inner race 107.
When in equipment running process, dead axle and the housing of hydraulic motor can rotate relative motion.
Motor dead axle, bearing inner race remain static, motor upper shell, motor lower housing, clamp spring a, clamp spring b, skeleton
Sealing, dustband rotate movement by axis of motor center's line.
As shown in Fig. 2, motor bearing inner ring is more wider than cylindrical roller, such bearing inner race can be used as wear ring with
Reinforced seal and dustband are in contact, and the lip of reinforced seal and dustband is made to deform, so as to play sealing function.Such as figure
Shown in 3 partial enlarged views, there are a step surface, the axial direction as dustband is determined for the position that dustband coordinates with motor shell
Position, therefore when each replacement sealing, in order to avoid dustband is scratched by step surface 108, motor upper casing can only be dismantled first
Connection bolt between body and motor lower housing, removes motor upper shell, then by motor lower housing push down on clamp spring a and
Clamp spring b, clamp spring a housing washer and reinforced seal again, clamp spring b promote dustband, then remove clamp spring a again, so as to from horse
It dismantles bearing outer ring and reinforced seal up to top, then removes clamp spring b, and then dustband is taken out above motor.
The limitation that this traditional seal form is sealed due to single lip, voltage endurance capability is limited, can not ensure in mud
Under the larger operating mode of depth, the reliability of sealing, and also replacement sealing needs to dismantle the upper-lower casing of motor, and outside motor shell
Other mechanical structures are connected with, therefore, sealing is replaced to bother very much, can not almost realize at the scene.Moreover, at the scene in order to
Equipment normal operation generally can only all prepare complete milling wheel drive assembly, comprising motor and external attached mechanical structure, once it is close
Envelope goes wrong, just can only be by entire unit replacement, and original assembly is beamed back genuine and is carried out maintenance, so to cost and duration
All bring huge loss.
For this purpose, the designer of the present invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time
The experience and achievement of related industry, research and design goes out a kind of improved seal structure for hydraulic motor, to overcome drawbacks described above.
The content of the invention
It is an object of the invention to provide a kind of improved seal structure for hydraulic motor, simple in structure, handling sides
Just, it can guarantee the reliability sealed under the larger operating mode of depth of mud, and can easily be replaced, and then from cost and duration
Aspect brings enormous benefits.
To solve the above problems, the invention discloses a kind of improved seal structure for hydraulic motor, it is close including first
Sealing assembly and the second seal assembly, hydraulic motor includes motor dead axle and motor lower housing, between the two equipped with motor bearing, institute
The motor bearing inner ring for stating motor bearing is resisted against motor dead axle and extends outward from motor bearing, outside the motor dead axle
End is fixed with end cap flange, and the diameter of the end cap flange is more than motor dead axle to be covered in the outside of motor lower housing, special
Sign is：
First seal assembly include at least two-way lip combined seal ring, the two-way lip combined seal ring it is interior
Edge is in close contact with motor bearing inner ring, and outer rim is in close contact with motor lower housing, and the two-way lip combined seal ring passes through
One clamp spring carries out axially position, and the clamp spring insertion is arranged in the groove of motor lower housing；
Second seal assembly is arranged between end cap flange and motor lower housing, and second seal assembly includes solid
Envelope flange and the upper floating sealing base being fixed on motor lower housing are floated downward due to end cap flange, described float downward seals flange and floating
Envelope seat is oppositely arranged, and the envelope flange of floating downward is equipped with a storage tank, and the outside of the upper floating sealing base, which is equipped with, stretches into the storage tank
Extension, form the accommodating space of an accommodating float grease seal so as to which extension is stretched into after storage tank.
Wherein：The two-way lip combined seal ring is made of two-way lip sealing ring, retainer and O-ring, the guarantor
The inner edge for holding frame is equipped with the square groove kept for the insertion of two-way lip sealing ring, and the outer rim of the retainer, which is equipped with, supplies the O
The recessed portion that the insertion of type circle is kept.
Wherein：The float grease seal includes the upper floating sealing ring being correspondingly arranged and lower floating sealing ring, and the storage tank includes upper appearance
Slot and lower storage tank are put, the upper floating sealing ring and lower floating sealing ring have pin hole, and the upper floating sealing base is provided with corresponding to floating
The through hole of seal ring inner pinhole, with by being mounted on the gear pin in the pin hole of upper floating sealing ring and the through hole of upper floating sealing base to floating
The upper floating sealing ring of oil sealing is driven, and the slot bottom of the storage tank for floating downward envelope flange is provided with corresponding to lower floating sealing ring inner pinhole
Uniformly distributed blind hole, to be carried out by the blind hole axis pin being mounted in the pin hole and blind hole of lower floating sealing ring to the lower floating sealing ring of float grease seal
Transmission.
Wherein：Be equipped with sealing ring between the upper floating sealing ring and the extension, the lower floating sealing ring and lower storage tank it
Between be equipped with sealing ring.
Wherein：The outside top of the bottom of the extension and the lower storage tank is equipped with internal projection with stable guarantor
Hold sealing ring.
Wherein：A wherein blind hole for the storage tank for floating downward envelope flange is communicated with an asphalt channel, the end cap flange
Equipped with oil circuit in flange, oil communication in the asphalt channel and the flange, the blind hole axis pin in a wherein blind hole
For oil circuit axis pin.
Wherein：The oil circuit axis pin includes the upper axle portion and lower shaft portion that are wholely set, under the diameter of the upper axle portion is less than
The diameter of axle portion, the upper axle portion stretch into the pin hole of the storage tank, and the lower shaft portion stretches into the blind hole for floating downward envelope flange,
And the lower shaft portion is equipped with a planar portions to ensure the blind hole epicoele being located on the outside of motor dead axle and asphalt channel in end cap flange
Communicate the cooperation with oil circuit axis pin and blind hole.
Wherein：The end cap flange bottom is provided with two circles and uniformly leads to stepped hole, passes through the fixation spiral shell in the stepped hole of outer ring
Bolt is bolted with floating downward envelope flange, and bolt company is carried out by the installation bolt in the stepped hole of inner ring and motor dead axle
It connects.
Wherein：The O-ring slot there are three different-diameter is opened in the upper surface of the end cap flange from outside to inside, is respectively provided with the
One O-ring, the second O-ring and the 3rd O-ring.
Wherein：The upper floating sealing base is provided with O-ring slot with motor lower housing joint face, and equipped with the 4th O-ring.
By said structure, the improved seal structure for hydraulic motor of the invention has the following effects that：
1st, dust-proof coil structures are eliminated, therefore the sealing structure of the present invention does not have to by dismantling motor upper-lower casing, and can
With in end cap flange of dismantling, float downward envelope flange and clamp spring after, directly by the threaded hole of retainer end face, after installation bolt, lead to
It crosses external force and is directly pulled out between bearing inner race and motor lower housing and replaced；
2nd, flange end cap in this sealing structure, motor dead axle, bearing inner race, two-way lip combined seal ring, upper floating sealing base,
Float grease seal can form a closing chamber with envelope flange is floated downward, and float downward envelope flange and be provided with an asphalt channel and oil circuit phase in end cap flange
It is logical, pressure oil can be injected into closing chamber by this oil circuit, coordinate external pressure compensation device, pressure in closing chamber can be made
Oil pressure is more slightly higher than external mud pressure always, so ensures that the pressure of exocoel in float grease seal remains balance,
Mud is made to cannot be introduced into closing chamber；
3rd, the characteristic of two-way lip combined seal ring two way seal, the oil that can be obstructed in closing chamber enter motor shell,
So as to form second layer protection to motor inside, and then it ensure that the reliability of motor seal.
The detailed content of the present invention can be obtained by aftermentioned explanation and institute's attached drawing.
Description of the drawings
Fig. 1 shows the structure diagram of the prior art.
Fig. 2 shows the enlarged diagram of part A in Fig. 1.
Fig. 3 shows the enlarged diagram of part B in Fig. 2.
Fig. 4 shows the improved seal structure for hydraulic motor of the present invention.
Fig. 5 shows the asphalt channel schematic diagram of the present invention.
Fig. 6 shows the blind hole axis pin schematic diagram of the present invention.
Fig. 7 shows the top view of Fig. 6.
Reference numeral：
Fixing bolt 1, the first O-ring 2, the second O-ring 3, installation bolt 4, end cap flange 5, the 3rd O-ring 6, motor are fixed
Axis 7, motor bearing inner ring 8, motor lower housing 9, two-way lip combined seal ring 10, clamp spring 11, fastening bolt the 12, the 4th are O-shaped
Circle 13, gear pin 14, upper floating sealing base 15, float grease seal 16, float downward envelope flange 17, blind hole axis pin 18, blind hole epicoele 19, oil circuit
Oil circuit 21, oil circuit axis pin 22, upper axle portion 221, lower shaft portion 222, transition part 223, planar portions 224 in passage 20, flange.
Specific embodiment
Referring to Fig. 4 to Fig. 7, it is shown that the improved seal structure for hydraulic motor of the invention.
The improved seal structure for hydraulic motor includes the first seal assembly and the second seal assembly, hydraulic motor
Comprising motor dead axle 7 and motor lower housing 9, between the two equipped with motor bearing, the motor bearing inner ring 8 of the motor bearing supports
It is against motor dead axle and extends outward from motor bearing, first seal assembly includes at least two-way lip combined seal ring
10, the inner edge of the two-way lip combined seal ring 10 is in close contact with the positive camber of motor bearing inner ring 8, under outer rim and motor
The negative camber of housing 9 is in close contact, and the two-way lip combined seal ring 10 carries out axially position by a clamp spring 10, described
The insertion of clamp spring 10 is arranged in the groove of motor lower housing 9, it is preferred that the two-way lip combined seal ring 10 is by two-way lip
Side sealing ring, retainer and O-ring composition, the inner edge of the retainer is equipped with keeps square for the insertion of two-way lip sealing ring
Groove, the outer rim of the retainer are equipped with the recessed portion kept for O-ring insertion, and the retainer be axially arranged with it is uniformly distributed
Threaded hole, in order to mount and dismount.
The outer end of the motor dead axle 7 is fixed with end cap flange 5 by multiple installation bolts 4, the end cap flange 5 it is straight
Footpath is more than motor dead axle 7 to be covered in the outside of motor lower housing 9, and second seal assembly is arranged at end cap flange 5 and horse
Envelope is floated downward up between lower housing 9, second seal assembly includes to be fixed on end cap flange 5 by multiple fixing bolts 1
Flange 17 and the upper floating sealing base 15 being fixed on by multiple fastening bolts 12 on motor lower housing 9, it is described to float downward envelope flange 17
It is oppositely arranged with upper floating sealing base 15, the envelope flange 17 of floating downward is equipped with a storage tank, and the outside of the upper floating sealing base 15, which is equipped with, stretches
Enter the extension of the storage tank, the accommodating space for housing a float grease seal 16 is formed so as to which extension is stretched into after storage tank.
Preferably, the float grease seal 16 includes the upper floating sealing ring being correspondingly arranged and lower floating sealing ring, the storage tank bag
Containing upper storage tank and lower storage tank, the outer diameter of the upper storage tank is more than the outer diameter of lower storage tank, and the two internal diameter is identical (referring to figure
4 and Fig. 5), and the extension of the upper floating sealing base 15 stretches into the outside of storage tank, so as to form what is inserted for float grease seal 16
Accommodating space, the upper floating sealing ring and lower floating sealing ring have pin hole, and the upper floating sealing base 15 is provided with corresponding to upper floating sealing ring
The through hole of inner pinhole, with by being mounted on the gear pin 14 in the pin hole of upper floating sealing ring and the through hole of upper floating sealing base 15 to floating
The upper floating sealing ring of oil sealing 16 is driven.
Preferably, it is equipped with sealing ring between the upper floating sealing ring and the extension, the lower floating sealing ring and lower accommodating
Sealing ring is equipped between slot, and the outside top of the bottom of the extension and the lower storage tank is equipped with internal projection with steady
Fixed holding sealing ring.
The slot bottom of the storage tank for floating downward envelope flange 17 is provided with the uniformly distributed blind hole corresponding to lower floating sealing ring inner pinhole, with logical
The blind hole axis pin 18 crossed in the pin hole and blind hole of lower floating sealing ring is driven the lower floating sealing ring of float grease seal 16.
Preferably, 18 transition of the blind hole axis pin cooperation is fixed in blind hole, and 14 transition of gear pin is matched with
In the through hole of upper floating sealing base 15.
Preferably, the upper floating sealing base 15 is provided with uniformly distributed stepped hole, and the stepped hole is under fastening bolt 12 and motor
Housing 9 is connected.
Preferably, 5 bottom surface of end cap flange is provided with two circles uniformly logical stepped hole, passes through consolidating in the stepped hole of outer ring
Determining bolt 1 can be bolted with floating downward envelope flange 17, can be with motor by the installation bolt 4 in the stepped hole of inner ring
Dead axle 7 is bolted.
Preferably, the O-ring slot there are three different-diameter is opened in the upper surface of the end cap flange from outside to inside, fills respectively
There are the first O-ring 2, the second O-ring 3 and the 3rd O-ring 6, wherein, first O-ring 2 is located at end cap flange 5 and floats downward envelope
Between flange 17,3 and the 3rd O-ring 6 of the second O-ring is between end cap flange 5 and motor dead axle 7.
Preferably, the upper floating sealing base 15 is provided with O-ring slot with 9 joint face of motor lower housing, and equipped with the 4th O-ring
13。
Referring to Fig. 5, it is shown that oil circuit of the invention is set, and a wherein blind hole for the storage tank for floating downward envelope flange 17 connects
An asphalt channel 20 is connected with, the end cap flange 5 is equipped with oil circuit 21 in flange, the asphalt channel 20 and oil circuit in the flange
21 connect, and the blind hole axis pin 18 in a wherein blind hole can be the oil circuit axis pin 22 especially set, certainly, art technology
Personnel understand that the blind hole axis pin 18 can also be all oil circuit axis pin 22.
The schematic diagram of the oil circuit axis pin 22 includes the upper axle portion being wholely set referring to Fig. 6 and Fig. 7, the oil circuit axis pin 22
221 and lower shaft portion 222, the diameter of the upper axle portion 221 is less than the diameter of lower shaft portion 222, and the upper axle portion 221 stretches into the appearance
The pin hole of slot is put, the lower shaft portion 222 stretches into the blind hole for floating downward envelope flange 17, and the lower shaft portion 222 is equipped with a plane
Portion 224 so as to ensure that the blind hole epicoele 19 for being located at 7 outside of motor dead axle is communicated with asphalt channel 20 in end cap flange 17, also may be used
To ensure that oil circuit axis pin 22 and the transition of blind hole coordinate.
Preferably, it is the transition part 223 of gradual change between the upper axle portion 221 and lower shaft portion 222.
Preferably, oil circuit 21 can be communicated in external oil circuit feedway in the flange, also can by oil-sealing arrangement into
Row seal operation.
It can be seen that the advantage of the invention is that：
1st, dust-proof coil structures are eliminated, therefore the sealing structure of the present invention does not have to by dismantling motor upper-lower casing, and can
With in end cap flange of dismantling, float downward envelope flange and clamp spring after, directly by the threaded hole of retainer end face, after installation bolt, lead to
It crosses external force and is directly pulled out between bearing inner race and motor lower housing and replaced；
2nd, flange end cap in this sealing structure, motor dead axle, bearing inner race, two-way lip combined seal ring, upper floating sealing base,
Float grease seal can form a closing chamber with envelope flange is floated downward, and float downward envelope flange and be provided with an asphalt channel and oil circuit phase in end cap flange
It is logical, pressure oil can be injected into closing chamber by this oil circuit, coordinate external pressure compensation device, pressure in closing chamber can be made
Oil pressure is more slightly higher than external mud pressure always, so ensures that the pressure of exocoel in float grease seal remains balance,
Mud is made to cannot be introduced into closing chamber；
3rd, the characteristic of two-way lip combined seal ring two way seal, the oil that can be obstructed in closing chamber enter motor shell,
So as to form second layer protection to motor inside, and then it ensure that the reliability of motor seal.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing in embodiment and embodiment being described in the drawings, the present invention does not limit
By attached drawing example and be described as in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention is by any embodiment of the description and appended claims including falling into front.
Claims (10)
1. a kind of improved seal structure for hydraulic motor, including the first seal assembly and the second seal assembly, hydraulic motor
Comprising motor dead axle and motor lower housing, between the two equipped with motor bearing, the motor bearing inner ring of the motor bearing against
Extend outward in motor dead axle and from motor bearing, the outer end of the motor dead axle is fixed with end cap flange, the end cap method
Blue diameter is more than motor dead axle to be covered in the outside of motor lower housing, it is characterised in that：
First seal assembly include at least two-way lip combined seal ring, the inner edge of the two-way lip combined seal ring with
Motor bearing inner ring is in close contact, and outer rim is in close contact with motor lower housing, and the two-way lip combined seal ring passes through a card
Spring carries out axially position, and the clamp spring insertion is arranged in the groove of motor lower housing；
Second seal assembly is arranged between end cap flange and motor lower housing, and second seal assembly, which includes, to be fixed on
End cap flange floats downward envelope flange and the upper floating sealing base being fixed on motor lower housing, and described float downward seals flange and upper floating sealing base
It is oppositely arranged, the envelope flange of floating downward is equipped with a storage tank, and the outside of the upper floating sealing base, which is equipped with, stretches into prolonging for the storage tank
Extending portion forms the accommodating space for housing a float grease seal so as to which extension is stretched into after storage tank.
2. the improved seal structure of hydraulic motor is used for as described in claim 1, it is characterised in that：The two-way lip combination
Sealing ring is made of two-way lip sealing ring, retainer and O-ring, and the inner edge of the retainer, which is equipped with, supplies two-way lip sealing ring
The embedded square groove kept, the outer rim of the retainer are equipped with the recessed portion kept for O-ring insertion.
3. the improved seal structure of hydraulic motor is used for as claimed in claim 1 or 2, it is characterised in that：The float grease seal
Comprising the upper floating sealing ring and lower floating sealing ring being correspondingly arranged, the storage tank includes upper storage tank and lower storage tank, the envelope that floats
Ring and lower floating sealing ring have pin hole, and the upper floating sealing base is provided with the through hole corresponding to upper floating sealing ring inner pinhole, to pass through peace
Gear pin in the pin hole of upper floating sealing ring and the through hole of upper floating sealing base is driven the upper floating sealing ring of float grease seal, institute
The slot bottom for stating the storage tank for floating downward envelope flange is provided with uniformly distributed blind hole corresponding to lower floating sealing ring inner pinhole, to be floated downward by being mounted on
Blind hole axis pin in the pin hole and blind hole of seal ring is driven the lower floating sealing ring of float grease seal.
4. the improved seal structure of hydraulic motor is used for as claimed in claim 3, it is characterised in that：The upper floating sealing ring and institute
It states and sealing ring is equipped between extension, sealing ring is equipped between the lower floating sealing ring and lower storage tank.
5. the improved seal structure of hydraulic motor is used for as claimed in claim 4, it is characterised in that：The bottom of the extension
And the outside top of the lower storage tank is equipped with internal projection with stable holding sealing ring.
6. the improved seal structure of hydraulic motor is used for as claimed in claim 3, it is characterised in that：Described float downward seals flange
A wherein blind hole for storage tank is communicated with an asphalt channel, and the end cap flange is equipped with oil circuit in flange, the asphalt channel with
Oil communication in the flange, the blind hole axis pin in a wherein blind hole are oil circuit axis pin.
7. the improved seal structure of hydraulic motor is used for as claimed in claim 6, it is characterised in that：The oil circuit axis pin includes
The upper axle portion and lower shaft portion being wholely set, the diameter of the upper axle portion are less than the diameter of lower shaft portion, and the upper axle portion stretches into described
The pin hole of storage tank, the lower shaft portion stretches into the blind hole for floating downward envelope flange, and the lower shaft portion is equipped with a planar portions to protect
The blind hole epicoele that card is located on the outside of motor dead axle communicates the cooperation with oil circuit axis pin and blind hole with asphalt channel in end cap flange.
8. the improved seal structure of hydraulic motor is used for as described in claim 1, it is characterised in that：The end cap flange bottom
It is provided with two circles and uniformly leads to stepped hole, be bolted, led to floating downward envelope flange by the fixing bolt in the stepped hole of outer ring
The installation bolt crossed in the stepped hole of inner ring is bolted with motor dead axle.
9. the improved seal structure of hydraulic motor is used for as described in claim 1, it is characterised in that：The end cap flange it is upper
The O-ring slot there are three different-diameter is opened in end face from outside to inside, is respectively provided with the first O-ring, the second O-ring and the 3rd O-ring.
10. the improved seal structure of hydraulic motor is used for as described in claim 1, it is characterised in that：The upper floating sealing base with
Motor lower housing joint face is provided with O-ring slot, and equipped with the 4th O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034536.3A CN108105388B (en) | 2018-01-15 | 2018-01-15 | Improved sealing structure for hydraulic motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027241A (en) * | 2018-08-02 | 2018-12-18 | 安徽海蚨祥橡胶有限公司 | A kind of rubber-plastic sealing part for automobile engine |
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| CN104329287A (en) * | 2014-10-24 | 2015-02-04 | 天津天易海上工程有限公司 | Underwater hydraulic motor and shaft sealing device |
| JP2016121753A (en) * | 2014-12-25 | 2016-07-07 | 株式会社ジェイテクト | Bearing device for wheel |
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| CN101737006A (en) * | 2009-11-25 | 2010-06-16 | 煤炭科学研究总院太原研究院 | Dry wet-type drill box of anchor rod drill carriage |
| CN103089978A (en) * | 2013-01-24 | 2013-05-08 | 徐州科源液压股份有限公司 | Combined sealing device for caterpillar crane chassis to drive hydraulic motor speed reducer |
| CN104329287A (en) * | 2014-10-24 | 2015-02-04 | 天津天易海上工程有限公司 | Underwater hydraulic motor and shaft sealing device |
| JP2016121753A (en) * | 2014-12-25 | 2016-07-07 | 株式会社ジェイテクト | Bearing device for wheel |
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| CN109027241A (en) * | 2018-08-02 | 2018-12-18 | 安徽海蚨祥橡胶有限公司 | A kind of rubber-plastic sealing part for automobile engine |
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