CN106471253B - gear pump or motor - Google Patents
gear pump or motor Download PDFInfo
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- CN106471253B CN106471253B CN201480079130.7A CN201480079130A CN106471253B CN 106471253 B CN106471253 B CN 106471253B CN 201480079130 A CN201480079130 A CN 201480079130A CN 106471253 B CN106471253 B CN 106471253B
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- Prior art keywords
- gear
- sliding
- hydraulic pressure
- sliding surface
- receiving room
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A kind of gear pump or motor are provided, even if in the both sides of gear raw material mutually different using sliding, also can effectively assure mechanical efficiency and durability, gear pump of the invention or motor include：Gear mesh is intermeshed；Shell structure body, in the internal gear receiving room for having and storing the gear mesh；And a side plate, it is contained in the gear receiving room；And in the inside of the gear receiving room, the one side of the gear mesh and the shell structure body sliding contact, and the another side of the gear mesh and the side plate sliding contact, and in the sliding between sliding between the gear mesh and the shell structure body and the gear mesh and the side plate, make the hydraulic pressure for acting on the gear side of the low one side of sliding active area be more than the gear side for acting on the high one side of sliding hydraulic pressure active area.
Description
Technical field
The present invention relates to a kind of for the gear pump (gear pump) of industrial machinery etc. or motor (motor).
Background technology
In the past, following hydraulic gear pump or motor be as we all know there are：With main body (body) and cover (cover)
A pair of of gear is contained in shell (housing) tectosome.In the gear pump or motor, have on the proposition of a pair of of gear as follows
Person：In order to assure mechanical efficiency and durability, and (example is clipped by a pair of side plates for being different from main body and cover and forming from both sides
As referring to patent document 1).
Herein, in start, hydraulic pressure is slidingly contacted at slip side of the surface side towards gear of gear from the side plate
Effect.The intensity of the size, that is, hydraulic pressure in the region of the hydraulic action is usually by gear compared with the anglec of rotation of main body, with bridgeing across
Both sealing (seal) length of the side plate slided from the region in bottom of the tooth portion towards the axle center of gear and determine.Moreover, tooth
The cyclically-varying all the time of the anglec of rotation of wheel, and the seal length is with the bottom of the tooth footpath with gear and arranged on the aperture of side plate
The comparable seal length of difference and determine.That is, the region of the hydraulic action when shape of gear is identical is by the sealing
Length and determine.In addition, in back side, that is, non-slip face of the sliding surface of side plate, acted on to the direction opposite with the hydraulic pressure
Hydraulic pressure is determined by the shape for the three word washers (gasket) for separating high-low pressure.That is, in existing hydraulic pump or motor, lead to
It crosses and the shape of the seal length and the washer is carried out suitably to adjust so that hydro-cushion, and with appropriate power by side plate pressure
Gear is butted on, so as to inhibit the internal leakage from gear side.As a result, such as mekydro recorded in the patent document 1
Pump or motor since gear being sandwiched using the side plate of the same shape, so towards gear two sides act on hydraulic pressure in front side
(front side) is equal with rear side (rear side).As a result it is, axially to the liquid from both side plate side of gearing
Pressure offsets, and gear is in the state of mechanics neutrality in axial direction.
[prior art literature]
[patent document]
[patent document 1] Japanese Patent Laid-Open 2012-077686 publications
The content of the invention
The subject that the invention solves
In addition, following situation is also contemplated at present：For the purpose of increase by design freedom etc., in the both sides of gear using not
Same raw material.In the case, if the hydraulic pressure from both sides that will act on gear samely is set as equal, have
Following worry：In the sliding surface for being slidingly contacted at gear, the raw material side of sliding difference and the raw material side of excellent in sliding property
It is big compared to friction, thus the possibility of clamping stagnation (seizure) becomes higher.Furthermore, it is believed that in the case, make with the both sides in gear
It is compared with the existing situation of the equal sliding material of sliding, mechanical efficiency and durability are also deteriorated.
Currently invention addresses such unfavorable condition, and it is an object of the present invention to provide a kind of gear pump or motor, i.e., box lunch is in gear
Both sides using sliding mutually different raw material when, also can effectively assure mechanical efficiency and durability.
Technical means to solve problem
The present invention takes following means to reach such purpose.
That is, gear pump or motor of the invention includes：Gear mesh is intermeshed；Shell structure body has in inside and receives
Receive the gear receiving room of the gear mesh；And a side plate, it is housed in the gear receiving room；And in the gear receiving room
Inside, the one side of the gear mesh and the shell structure body sliding contact, and the another side of the gear mesh and institute
Side plate sliding contact is stated, the gear pump or motor are characterized in that：Cunning between the gear mesh and the shell structure body
In dynamic sliding between property and the gear mesh and the side plate, make the gear side for acting on the low one side of sliding
The active area of hydraulic pressure is more than the active area of the hydraulic pressure for the gear side for acting on the high one side of sliding.
In addition, the gear pump or motor of the present invention include：Gear mesh is intermeshed；And shell structure body, in inside
With the gear receiving room for storing the gear mesh, and in the inside of the gear receiving room and the two sides of the gear mesh point
Other sliding contact；The gear pump or motor are characterized in that：Sliding between the gear mesh and the shell structure body
In, it is more than the active area for the hydraulic pressure for acting on the gear side of the low one side of sliding and acts on the high one side of sliding
The active area of the hydraulic pressure of gear side.
Moreover, the gear pump or motor of the present invention include：Gear mesh is intermeshed；Shell structure body, has in inside
Store the gear receiving room of the gear mesh；And two side plates, be configured to the inside of the gear receiving room respectively with institute
State the two sides sliding contact of gear mesh；The gear pump or motor are characterized in that：In the gear mesh and described two sides
In sliding between plate, it is more than the active area for the hydraulic pressure for acting on the gear side of the low one side of sliding and acts on cunning
The active area of the hydraulic pressure of the gear side of the high one side of dynamic property.
If person as described above, then in start, the low one side of sliding is produced to the gear mesh towards sliding
The power of high one side force.It can inhibit as a result, and easily cause the unfavorable condition of clamping stagnation in the low one side of sliding.In addition, with inciting somebody to action
The active area and sliding are compared when being set to equal, are also inhibited the phenomenon that together caused by making the sliding of one side low
The decline of mechanical efficiency.As a result it is that is, box lunch, also can be effective in the both sides of gear raw material mutually different using sliding
Ground keeps mechanical efficiency and durability, therefore, it is possible to provide effectively improves the gear pump for the design freedom for forming gear receiving room
Or motor.
The effect of invention
According to the present invention, it is possible to provide following gear pump or motor：I.e. box lunch the both sides of gear using sliding mutually not
During identical raw material, mechanical efficiency and durability also can be effectively assured.
Description of the drawings
Fig. 1 is to represent the skeleton diagram of composition of gear pump of first embodiment of the present invention and the amplification of major part
Figure.
Fig. 2 is the definition graph of the major part of Fig. 1.
Fig. 3 is the skeleton diagram corresponding with Fig. 1 of second embodiment of the present invention and the enlarged drawing of major part.
Fig. 4 is the definition graph of the major part of Fig. 3.
Fig. 5 is the skeleton diagram corresponding with Fig. 1 of third embodiment of the present invention and the enlarged drawing of major part.
Fig. 6 is the definition graph of the major part of Fig. 5.
Fig. 7 is the skeleton diagram corresponding with Fig. 1 of the 4th embodiment of the present invention and the enlarged drawing of major part.
Fig. 8 is the definition graph of the major part of Fig. 7.
[explanation of symbol]
1：Shell structure body
2：Gear (drive gear)
3：Gear (driven gear)
2a、3a：Side
6d、61d、62d、11d、12d：Sliding surface
L6、L61、L62、L11、L12：Active area (seal length)
Specific embodiment
Hereinafter, various embodiments of the present invention will be described referring to the drawings.
The gear pump of the embodiments of the present invention performs following pumping action：When forming via extending outward out one end
The drive shaft 4, when being driven to the drive gear 2 and driven gear 3, the start fluid-tight imported from suction inlet is entered
Into the volume space closed between the inner circumferential of the tooth top and shell structure body 1 of drive gear 2 and driven gear 3, and guide
It spues to discharge opening.Moreover, the gear motor that the gear pump also may be performed as following motor effect certainly plays work
With, i.e. high pressure is made into hydrodynamic importing, as a result, from the drive shaft 4 extraction rotating torques (torque) and to external loading into
Row driving, and spue become low pressure make hydrodynamic.
＜ first embodiments ＞
Hereinafter, the first embodiment of the present invention is illustrated referring to FIG. 1 and FIG. 2.
The gear pump of present embodiment mainly includes：Shell structure body 1 has gear receiving room 11a in inside；External gear
It is right, i.e. drive gear 2 and driven gear 3, storage are held in the gear receiving room 11a of the shell structure body 1 and are intermeshed
It forms；And a side plate 6, gear 2, the front side of gear 3 are connected in the present embodiment.That is, the gear of present embodiment
Pump includes：Gear 2, gear 3；Shell structure body 1, in the internal gear receiving room 11a for having and storing the gear 2, gear 3；With
And a side plate 6, it is contained in the gear receiving room 11a；And in the inside of gear receiving room 11a, gear 2, the one of gear 3
11 sliding contact of main body of side 2a, side 3a and the shell structure body 1, and another side 2a, side 3a and side plate 6 slide
Contact.Specifically, shell structure body 1 is respectively provided with sliding surface 11d, sliding surface 6d, the sliding surface 11d, sliding surface with side plate 6
6d the inside of gear receiving room 11a from front side and rear side respectively with gear 2, the side 2a of gear 3, side 3a sliding contacts.
Drive gear 2 and driven gear 3 are that multiple denticles are i.e. outer from bottom of the tooth 2b, bottom of the tooth 3b towards tooth top 2c, tooth top 3c
The well-known gear that circumferential surface is arranged radially at predetermined intervals.In addition, in the present embodiment, make drive shaft 4
Integrally extend from the center of the drive gear 2 along rotation direction of principal axis and set, and make driven shaft 5 from 3 edge of driven gear
Rotation direction of principal axis integrally extends and sets, but also can drive gear 2 and drive shaft 4 be configured to Different Individual, and will be driven
Gear 3 is configured to Different Individual with driven shaft 5.
Shell structure body 1 for example including：Main body 11 has the gear receiving room 11a；And the protecgulum as cover
(front cover) 12, by the opening face closure of the gear receiving room 11a.In addition, in the present embodiment, by main body 11
It itself is set to rear side can be closed, but can also be set to that the rear side of the main body 11 is made also to be open certainly and utilize other rear cover
The composition that (rear cover) is closed.
In the present embodiment, main body 11 is for example using by cast iron former.It is formed in main body 11：Substantially glasses shape
Gear receiving room 11a accommodates the gear mesh, i.e. drive gear 2 and driven gear 3 with meshing state；And bearing hole
11b, bearing hole 11c are connected with the rear side of gear receiving room 11a, can be inserted into respectively for the drive shaft 4 and driven shaft 5.It is driving
Embedded with bushing (bush) 7 in bearing hole 11b near the position that moving gear 2 should be inserted into, the insertion drive in the bushing 7
The one end of moving axis 4 and rotatably supported.On the other hand, the bearing hole near position that should be inserted into driven gear 3
Also the one end of the driven shaft 5 is inserted into the bushing 7 and is rotatably supported embedded with bushing 7 in 11c.Separately
Outside, in main body 11, in the tangential direction side of the drive gear 2 and the operating pitch circle (pitch circle) of driven gear 3
Assigned position, i.e. the position closed on the operating pitch circle of the drive gear 2 and driven gear 3 offers not shown respectively
Suction inlet and discharge opening.
Moreover, in the present embodiment, the main body 11 be formed with sliding surface 11d, the sliding surface 11d and gear 2,
The side 2a of the rear side of gear 3, side 3a sliding contacts.Moreover, sliding surface 11d and side 2a, the face of side 3a sliding contacts
Product, i.e. from sliding surface 11d sides push side 2a, side 3a hydraulic pressure active area by bearing hole 11b, bearing hole 11c it is straight
The setting in footpath and determine.In other words, as shown in by the II portions amplification in Fig. 1, by from the end of bearing hole 11b, bearing hole 11c
11b1, end 11c1 to bottom of the tooth 2b, bottom of the tooth 3b distance, that is, seal length L11 and determine.That is, in the start of gear pump, tooth
That takes turns the high pressure in receiving room 11a makees gap of the hydrodynamic always between sliding surface 11d and side 2a, side 3a to be flowed into, as a result,
Effect has the active force that sliding surface 11d to be made is separated with side 2a, side 3a always, i.e. pushes the effect of side 2a, side 3a
Power.Moreover, the size of the active force is proportional to the area of sliding surface 11d and side 2a, side 3a sliding contacts.Moreover,
In the present embodiment, the area with using the size of seal length L11 as the region of the side view of thickness annular shape (not shown)
Size it is proportional.That is, described seal length L11 is longer, then makees side in gear receiving room 11a caused by hydrodynamic
The active force that 2a, side 3a are pushed to front side is bigger.
Protecgulum 12 is releasably installed on main body 11 such as using bolt (bolt), and by the gear receiving room
The front openings face closure of 11a is, for example, die casting aluminium (aluminium die casting) system, and is formed with for the drive
Bearing hole 12b, the bearing hole 12c that moving axis 4 and driven shaft 5 are inserted into respectively.The bearing near position that should be inserted into drive gear 2
Hole 12b is embedded with bushing 7, and the one end of the drive shaft 4 is inserted into the bushing 7 and is rotatably supported.It is another
Aspect, the bearing hole 12c near the position that should be inserted into driven gear 3 is also embedded with bushing 7, the insertion institute in the bushing 7
It states the one end of driven shaft 5 and is rotatably supported.
Side plate 6 is, for example, using corrosion resistances, intensity, the appropriate raw material of excellent wear resistance such as lead or lead bronze castings
The plate person formed, and it is formed with bearing hole 6b, the bearing hole 6c being inserted into respectively for the drive shaft 4 and driven shaft 5.At this
In embodiment, as shown in Figure 1, side plate 6 be in order to be connected in the side 2a of the front side of the drive gear 2 and driven gear 3,
Side 3a and be arranged, for by the side 2a of drive gear 2 and driven gear 3, side 3a seal.On the other hand, such as the figure
It is shown, the non-slip face 6e of the side plate 6 is provided with gasket groove 6f, so that washer 8 is embedded in the gasket groove 6f.
Moreover, in the present embodiment, sliding surface 6d, the sliding surface 6d and gear 2, tooth are formed in the side plate 6
The side 2a of the front side of wheel 3, side 3a sliding contacts.Moreover, sliding surface 6d and side 2a, the area of side 3a sliding contacts,
That is, from sliding surface 6d sides push side 2a, side 3a hydraulic pressure active area bearing hole 6b, bearing hole 6c as shown in Figure 2
Diameter phi S size setting and determine.In other words, as shown in by the I portions amplification in Fig. 1, by from bearing hole 6b, bearing hole 6c
End 6b1, end 6c1 to bottom of the tooth 2b, bottom of the tooth 3b distance, that is, seal length L6 and determine.That is, in the start of gear pump,
High pressure in gear receiving room 11a makees gap of the hydrodynamic always between sliding surface 6d and side 2a, side 3a to be flowed into, by
This, effect always has the active force that sliding surface 6d to be made is separated with side 2a, side 3a, i.e. pushes side 2a, the work of side 3a
Firmly.Moreover, the size of the active force is proportional to the area of sliding surface 6d and side 2a, side 3a sliding contacts.Moreover,
In the present embodiment, the area with using the size of seal length L6 as the region of the side view of thickness annular shape (not shown)
Size is proportional.That is, described seal length L6 is longer, then makees side 2a, side in gear receiving room 11a caused by hydrodynamic
The active force that face 3a is pushed to rear side is bigger.
Then, the gear pump of present embodiment or motor it is as described above as, have：It is intermeshed gear 2, the gear formed
3；In the internal gear receiving room 11a for having and storing the gear 2, gear 3；And two sides 2a, 3a of gear 2, gear 3 are point
The inside of gear receiving room 11a described in other sliding contact, and sliding between gear 2, gear 3 and main body 11 and described
In sliding between gear 2, gear 3 and side plate 6, make to act on gear 2 that the low one side of sliding faces with main body 11,
The side 2a of gear 3, the active area of the hydraulic pressure of side 3a, which are more than, acts on the tooth that the high one side of sliding is faced with side plate 6
Wheel 2, the side 2a of gear 3, side 3a hydraulic pressure active area.Specifically, with the one side 2a of gear 2, gear 3,
Sliding, i.e. of the sliding of the sliding of one sliding surface 11d of side 3a sliding contacts, i.e. cast iron less than another sliding surface 6d
Under the situation of the sliding of the raw material such as lead or lead bronze casting, decision is made to act on gear 2, gear 3 from a sliding surface 11d sides
One side 2a, side 3a hydraulic pressure active area seal length L11 be more than determine acted on from another sliding surface 6d sides
Gear 2, the side 2a of gear 3, side 3a hydraulic pressure active area seal length L6.
As a result, as shown in Figure 1, the sliding surface 11d sides of autonomous agent 11 by gear 2, the side 2a of gear 3, side 3a forward
Side push active force, that is, hydraulic pressure X be more than from the sliding surface 6d sides of side plate 6 by gear 2, the side 2a of gear 3, side 3a backward
Active force, that is, hydraulic pressure Y that side pushes.As a result it is that gear 2, gear 3 are applied in the difference for the active force for being equivalent to hydraulic pressure X and hydraulic pressure Y
Divide the power of Z.As a result it is that the friction that the main body 11 low from sliding generates is mitigated.
Herein, in the present embodiment, gear 2, gear 3 apply the gear of same shape or symmetric shape in both sides.That is,
For gear, do not change any shape headed by bottom of the tooth, the size of tooth top and realize the composition of the present embodiment.That is,
As shown in Fig. 2, in the present embodiment, only by the way that the diameter phi B of bearing hole 11b, bearing hole 11c is made to be less than bearing hole 6b, axis
The diameter phi S of bearing bore 6c, and as shown in amplification in Fig. 1, seal length L11 is made to be more than seal length L6, makes hydraulic action as a result,
Active area increase.
By being set to such as above composition, in the present embodiment, by generating the power Z applied towards side plate 6, and it is effective
The sliding surface 11d that ground inhibits in the low one side of sliding easily causes the unfavorable condition of clamping stagnation.In addition, also inhibit together because of main body
The sliding of 11 sliding surface 11d is less than the decline of mechanical efficiency caused by the situation of the sliding of the sliding surface 6d of side plate 6.
As a result it is when that is, box lunch is for two sides 2a, 3a of gear 2, gear 3 raw material mutually different using sliding, can also have
Effect ground guarantee mechanical efficiency and durability.Therefore, gear pump or the horse for effectively improving the design freedom for forming sliding surface are realized
It reaches.
Especially in the present embodiment, even if not setting side plate in 11 side of rear side, that is, main body, it may have same
Mechanical efficiency and durability, therefore, gear pump or motor dimension reduce the thickness for the side plate at least corresponding to can be not provided with
Size and formed small-sizedly on the direction of principal axis of gear.
Hereinafter, various embodiments of the present invention will be described.In the following embodiments, pair with the embodiment
In the suitable person of inscape mark identical symbol and omit detailed description.
＜ second embodiments ＞
In the first embodiment, disclose by side plate 6 only be arranged on gear 2, gear 3 front side embodiment,
But the rear side as present embodiment that certainly also can be as shown in Figures 3 and 4 only in gear 2, gear 3 sets side plate 6.
That is, the gear pump of present embodiment includes：Gear 2, gear 3；Shell structure body 1 has in inside and stores the tooth
Wheel 2, the gear receiving room 11a of gear 3；And a side plate 6, it is contained in the gear receiving room 11a；And it is stored in gear
The inside of room 11a, 12 sliding contact of protecgulum of gear 2, the one side 2a of gear 3, side 3a and shell structure body 1, and it is another
Side 2a, side 3a and 6 sliding contact of side plate.Specifically, shell structure body 1 is respectively provided with sliding surface 12d with side plate 6, slides
Face 6d, the sliding surface 12d, sliding surface 6d are in the inside of gear receiving room 11a respectively from front side and rear side and gear 2, gear 3
Side 2a, side 3a sliding contacts.In other words, in the present embodiment, it is formed with sliding surface 12d, the cunning in protecgulum 12
Dynamic face 12d and gear 2, the side 2a of the front side of gear 3, side 3a sliding contacts.Moreover, sliding surface 12d and side 2a, side
The area of 3a sliding contacts, i.e. from sliding surface 12d sides push side 2a, side 3a hydraulic pressure active area as shown in Figure 4
Bearing hole 12b, bearing hole 12c diameter phi B size setting and determines, in other words, scheme as will be described shown in III portions amplify,
By end 12b1, the end 12c1 from bearing hole 12b, bearing hole 12c to bottom of the tooth 2b, distance, that is, seal length L12 of bottom of the tooth 3b
And it determines.That is, in the start of gear pump, high pressure in gear receiving room 11a make hydrodynamic always sliding surface 12d to be flowed into
Gap between side 2a, side 3a, effect plays the role of sliding surface 12d to be made and side 2a always as a result, side 3a is separated
Power, i.e. push side 2a, the active force of side 3a.Moreover, the size of the active force and sliding surface 12d and side 2a, side
The area of 3a sliding contacts is proportional.Moreover, in the present embodiment, the area with using the size of seal length L12 to be thick
The size in the region of the side view annular shape (not shown) of degree is proportional.That is, described seal length L12 is longer, then gear receiving room
The active force for making to push side 2a, side 3a to rear side caused by hydrodynamic in 11a is bigger.
In addition, in the present embodiment, side plate 6 is in symmetric shape with the first embodiment, and is formed with sliding surface
6d, the sliding surface 6d and gear 2, the side 2a of the rear side of gear 3, side 3a sliding contacts.Moreover, sliding surface 6d and side
2a, the area of side 3a sliding contacts, i.e. from sliding surface 6d sides push side 2a, side 3a hydraulic pressure active area by Fig. 4
Shown bearing hole 6b, the diameter phi S of bearing hole 6c size setting and determine.In other words, as the IV portions in Fig. 3 are amplified institute
Show, by end 6b1, the end 6c1 from bearing hole 6b, bearing hole 6c to bottom of the tooth 2b, bottom of the tooth 3b distance, that is, seal length L6 and
It determines.That is, in the start of gear pump, high pressure in gear receiving room 11a makees hydrodynamic sliding surface 6d to be flowed into and side always
Gap between face 2a, side 3a, effect has the active force that sliding surface 6d to be made is separated with side 2a, side 3a always as a result,
That is, side 2a, the active force of side 3a are pushed.Moreover, the size of the active force is slided with sliding surface 6d and side 2a, side 3a
The area of dynamic contact is proportional.Moreover, in the present embodiment, the area with using the size of seal length L6 as the side of thickness
Size depending on the region of annular shape (not shown) is proportional.That is, described seal length L6 is longer, then in gear receiving room 11a
It is bigger to make the active force for pushing side 2a, side 3a to front side caused by hydrodynamic.
Then, the gear pump of present embodiment or motor are the sliding between gear 2, gear 3 and protecgulum 12 and institute
It states in the sliding between gear 2, gear 3 and side plate 6, makes to act on the gear that the low one side of sliding is faced with protecgulum 12
2nd, the side 2a of gear 3, side 3a hydraulic pressure active area be more than act on what the high one side of sliding was faced with side plate 6
Gear 2, the side 2a of gear 3, side 3a hydraulic pressure active area.Specifically, in the one side with gear 2, gear 3
2a, side 3a sliding contacts front side a sliding surface 12d sliding, i.e. die casting aluminium sliding be less than rear side another cunning
Under the situations of the sliding of raw material such as sliding, i.e. lead or the lead bronze casting of dynamic face 6d, make decision from a sliding surface 12d sides
Gear 2, the one side 2a of gear 3, the seal length L12 of active area of hydraulic pressure of side 3a is acted on to be more than and determine from another
Sliding surface 6d sides act on gear 2, the side 2a of gear 3, side 3a hydraulic pressure active area seal length L6.
As a result, as shown in figure 3, from the sliding surface 12d sides of protecgulum 12 by gear 2, the side 2a of gear 3, side 3a backward
Side push active force, that is, hydraulic pressure X be more than from the sliding surface 6d sides of side plate 6 by gear 2, the side 2a of gear 3, side 3a forward
Active force, that is, hydraulic pressure Y that side pushes.Gear 2, gear 3 are applied in the difference Z for the active force for being equivalent to hydraulic pressure X and hydraulic pressure Y as a result,
Power.As a result it is that the friction that the protecgulum 12 low from sliding generates is mitigated.
In the present embodiment, only by the way that the diameter phi F of bearing hole 12b, bearing hole 12c is made to be less than bearing hole 6b, bearing
The diameter phi S of hole 6c, and as shown in amplification in Fig. 3, seal length L12 is made to be more than seal length L6, makes hydraulic action as a result,
Active area increases.
Such embodiment is realized and effectively assures mechanical efficiency and durable also in the same manner as the first embodiment
Property, and small-sized the gear pump or motor formed.
The 3rd embodiment ＞ of ＜
Following gear pump or motor are disclosed in each embodiment, i.e. by being set to only in front side or rear side
Either side set side plate 6 and opposite side be not provided with the composition of side plate 6 and it is small-sized form, but can also be set to preceding certainly
Side, the both sides of rear side are not provided with the embodiment of side plate 6.In other words, the structure that shell structure body 1 does not have side plate 6 can be also set to
Into.
That is, as shown in figure 5, the gear pump or motor of present embodiment include：Gear 2, gear 3；And shell structure body 1,
In the internal gear receiving room 11a for having and storing the gear 2, gear 3, and possess sliding surface 12d, sliding surface 11d, the cunning
Dynamic face 12d, sliding surface 11d are slided in two sides 2a, the 3a of the inside of the gear receiving room 11a respectively with gear 2, gear 3
Contact.In other words, the gear pump is respectively formed with sliding surface 11d, slip in the main body 11 and protecgulum 12 for forming shell structure body 1
Face 12d.Moreover, as shown in amplification in Fig. 5, by the way that seal length L11 is set greater than seal length L12, in start, meeting
The power Z applied to gear 2, gear 3 is generated near protecgulum 12.
It is concretely demonstrated, in the present embodiment, in protecgulum 12, is identically formed with the second embodiment
With gear 2, the side 2a of the front side of gear 3, side 3a sliding contacts sliding surface 12d.Moreover, sliding surface 12d and side 2a,
The area of side 3a sliding contacts, i.e. from sliding surface 12d sides push side 2a, side 3a hydraulic pressure active area by Fig. 4 institutes
The bearing hole 12b that shows, the diameter phi B of bearing hole 12c size setting and determine, in other words, such as the figure V portions enlarged drawing institute
Show, by end 12b1, the end 12c1 from bearing hole 12b, bearing hole 12c to bottom of the tooth 2b, distance, that is, seal length of bottom of the tooth 3b
L12 and determine.That is, in the start of gear pump, high pressure in gear receiving room 11a makees hydrodynamic sliding surface to be flowed into always
Gap between 12d and side 2a, side 3a, effect has sliding surface 12d to be made and side 2a, side 3a to separate always as a result,
Active force, i.e. push side 2a, the active force of side 3a.Moreover, the size of the active force and sliding surface 12d and side
2a, the area of side 3a sliding contacts are proportional.Moreover, in the present embodiment, the area and the ruler with seal length L12
The size in the region of the very little side view for thickness annular shape (not shown) is proportional.That is, described seal length L12 is longer, then gear
The active force for making to push side 2a, side 3a to rear side caused by hydrodynamic in receiving room 11a is bigger.
Moreover, in the present embodiment, in the main body 11, it is identically formed with the first embodiment and gear
2nd, the side 2a of the rear side of gear 3, the sliding surface 11d of side 3a sliding contacts.Moreover, sliding surface 11d and side 2a, side 3a
The area of sliding contact, i.e. from sliding surface 11d sides push side 2a, side 3a hydraulic pressure active area by bearing hole 11b,
The setting of the diameter of bearing hole 11c and determine, and as to shown in figure VI portions amplification, by from bearing hole 11b, bearing hole 11c
End 11b1, end 11c1 to bottom of the tooth 2b, bottom of the tooth 3b distance, that is, seal length L11 and determine.That is, in the start of gear pump
In, high pressure in gear receiving room 11a makees gap of the hydrodynamic always between sliding surface 11d and side 2a, side 3a to be flowed into,
Effect has the active force that sliding surface 11d to be made is separated with side 2a, side 3a always as a result, i.e. pushes side 2a, side 3a
Active force.Moreover, the size of the active force is proportional to the area of sliding surface 11d and side 2a, side 3a sliding contacts.
Moreover, in the present embodiment, the area with it is (not shown) circular by the side view of thickness of the size of seal length L11
The size in region is proportional.That is, described seal length L11 is longer, then makees side in gear receiving room 11a caused by hydrodynamic
The active force that face 2a, side 3a are pushed to front side is bigger.
Then, the gear pump of present embodiment or motor are the sliding between gear 2, gear 3 and main body 11 and institute
It states in the sliding between gear 2, gear 3 and protecgulum 12, makes to act on the tooth that the low one side of sliding is faced with main body 11
Wheel 2, the side 2a of gear 3, side 3a hydraulic pressure active area be more than act on the high one side of sliding i.e. with 12 face of protecgulum
To gear 2, the side 2a of gear 3, side 3a hydraulic pressure active area.Specifically, in the one side with gear 2, gear 3
Face 2a, side 3a sliding contacts a sliding surface 11d sliding, i.e. cast iron sliding be less than another sliding surface 12d cunning
It moves under property, the i.e. situation of the sliding of die casting aluminium, decision is made to act on the one side of gear 2, gear 3 from a sliding surface 11d sides
2a, the seal length L11 of active area of hydraulic pressure of side 3a are more than and determine from another sliding surface 12d sides to act on gear 2, tooth
Wheel 3 side 2a, side 3a hydraulic pressure active area seal length L12.
As a result, as shown in figure 5, the sliding surface 11d sides of autonomous agent 11 by gear 2, the side 2a of gear 3, side 3a forward
Side push active force, that is, hydraulic pressure X be more than from the sliding surface 12d sides of protecgulum 12 by gear 2, the side 2a of gear 3, side 3a to
Active force, that is, hydraulic pressure Y that rear side pushes.As a result it is that gear 2, gear 3 are applied in the active force that is equivalent to hydraulic pressure X and hydraulic pressure Y
The power of difference Z.As a result it is that the friction that the main body 11 low from sliding generates is mitigated.
Especially in the present embodiment, as shown in fig. 6, only by making the diameter phi B of bearing hole 11b, bearing hole 11c big
In bearing hole 12b, the diameter phi F of bearing hole 12c, and as shown in amplification in Fig. 5, seal length L11 is set greater than sealing
Length L12 as a result, increases the active area of hydraulic action.
By the composition as above, the gear pump or motor of present embodiment in the same manner as each embodiment effectively
Assure mechanical efficiency and durability, and each embodiment is smaller.
The 4th embodiment ＞ of ＜
As shown in each embodiment, according to the present invention, the choosing with the raw material of the side sliding contact of gear can be made
The scope increase selected.I.e., as shown in the embodiment, can also apply the present invention to be both provided in the front side of gear, rear side
The gear pump or motor of side plate 6.
That is, the gear pump of present embodiment or motor have each other in gear 2, the front side of gear 3, rear side substantially in symmetrical
Two side plates 6 of shape.Moreover, the side plate 6 of rear side in the same manner as the embodiment by raw material such as lead or lead bronze castings
It is formed, on the other hand, the sliding such as using iron plate of side plate 6 of front side is lower compared with rear side, in other words coefficient of friction is compared with rear side
Higher raw material.Moreover, in the same manner as the embodiment, these paired side plates 6 are respectively formed with and gear 2, gear 3
Front side, the side 2a of rear side, the sliding surface 61d of side 3a sliding contacts, sliding surface 62d.Moreover, sliding surface 61d, sliding surface
62d and side 2a, side 3a sliding contacts area, that is, hydraulic pressure active area bearing hole 6b, bearing hole 6c as shown in Figure 8
Diameter phi S1, diameter phi S2 size difference and determine.In other words, such as the figure VII portions enlarged drawing and enlarged drawing institute of VIII portions
Show, by end 6b1, the end 6c1 from bearing hole 6b, bearing hole 6c to bottom of the tooth 2b, bottom of the tooth 3b distance, that is, seal length L61,
Seal length L62 and determine.That is, in the start of gear pump, the hydrodynamic of making of the high pressure in gear receiving room 11a is intended to flow into always
Gap between sliding surface 61d and side 2a, side 3a, effect has sliding surface 61d to be made and side 2a, side always as a result,
The active force that 3a is separated, i.e. push side 2a, the active force of side 3a.Moreover, the size of the active force and sliding surface 61d
It is proportional with the area of side 2a, side 3a sliding contacts.Moreover, in the present embodiment, the area with seal length
The size of L61 is proportional for the size in the region of the side view annular shape (not shown) of thickness.That is, described seal length L61 is longer,
The active force for making to push side 2a, side 3a to front side caused by hydrodynamic then in gear receiving room 11a is bigger.The opposing party
Face, the gap for making hydrodynamic always between sliding surface 62d and side 2a, side 3a to be flowed into, as a result, effect always have and make
The active force that sliding surface 62d is separated with side 2a, side 3a, i.e. push side 2a, the active force of side 3a.Moreover, the work
Size firmly is proportional to the area of sliding surface 62d and side 2a, side 3a sliding contacts.Moreover, in the present embodiment,
The area is proportional as the size in the region of the side view of thickness annular shape (not shown) to using the size of seal length L62.That is,
The seal length L62 is longer, then makees to push away side 2a, side 3a to rear side caused by hydrodynamic in gear receiving room 11a
The active force of pressure is bigger.
Then, the gear pump of present embodiment or motor are the slips between the side plate 6 of gear 2, gear 3 and front side
In sliding between property and the side plate 6 of the gear 2, gear 3 and rear side, make to act on the low one side of sliding i.e. with it is preceding
Gear 2 that the side plate 6 of side faces, the side 2a of gear 3, the active area of hydraulic pressure of side 3a are more than that act on sliding high
One side be faced with the side plate 6 of rear side gear 2, the side 2a of gear 3, side 3a hydraulic pressure active area.Specifically,
Sliding in the sliding surface 62d with the one side 2a of gear 2, gear 3, the front side of side 3a sliding contacts, i.e. iron plate
Sliding is less than the situation of the slidings of raw material such as sliding, i.e. lead or the lead bronze casting of another sliding surface 61d of rear side
Under, make decision from sliding surface 62d sides act on gear 2, the one side 2a of gear 3, side 3a hydraulic pressure active area
Seal length L62 is more than the hydraulic pressure for determining that gear 2, the side 2a of gear 3, side 3a are acted on from another sliding surface 61d sides
The seal length L61 of active area.
As a result, as shown in fig. 7, from the sliding surface 62d sides of the side plate 6 of front side by gear 2, the side 2a of gear 3, side 3a
Active force, that is, hydraulic pressure the X pushed to rear side be more than from the sliding surface 61d sides of the side plate 6 of rear side by gear 2, gear 3 side 2a,
The active force that side 3a is pushed to front side, that is, hydraulic pressure Y.Gear 2, gear 3 are applied in the work for being equivalent to hydraulic pressure X and hydraulic pressure Y as a result,
The power of difference Z firmly.As a result it is that the friction that the side plate 6 of the front side low from sliding generates is mitigated.
In the present embodiment, only by the way that the bearing hole 6b of front side, the diameter phi S2 of bearing hole 6c is made to be relatively shorter than rear side
Bearing hole 6b, the diameter phi S1 of bearing hole 6c, and as in Fig. 7 amplification shown in, make seal length L62 be more than seal length L61,
As a result, increase the active area of hydraulic action.
Such embodiment is realized and effectively assures mechanical efficiency and durability also in the same manner as each embodiment
Gear pump or motor.
More than, embodiments of the present invention are illustrated, but the specific composition in each portion be not limited to it is described
Embodiment can carry out various modifications without departing from the spirit and scope of the invention.
For example, in each embodiment, disclose an axis only possess a gear embodiment gear pump or horse
It reaches, can also apply the present invention to hydraulic pump or motor that an axis possesses the so-called twin of two gears certainly.In the duplex
In the case of the gear pump or motor of formula, it can also apply and mode is implemented as follows：The bushing of a bearing side is omitted, the diameter of axle is made to become smaller phase
When in the size of the omission, and increase seal length i.e. active area.
In addition, the specific form of gear, side plate and then bushing is not limited to the form of the embodiment, comprising both
The form deposited can apply various forms inside.
In addition, the specific composition in each portion is also not necessarily limited to the embodiment, without departing from the spirit and scope of the invention
It can carry out various modifications.
[industrial availability]
The present invention can be used as the gear pump for industrial machinery etc. or motor.
Claims (3)
1. a kind of gear pump or motor, including：Gear mesh is intermeshed；Shell structure body has in inside and stores the tooth
The gear receiving room of wheel pair；And a side plate, it is contained in the gear receiving room, and in the inside of the gear receiving room,
The one side of the gear mesh and the shell structure body sliding contact, and the another side of the gear mesh is slided with the side plate
Dynamic contact, the gear pump or motor are characterized in that：
The sliding between sliding and the gear mesh and the side plate between the gear mesh and the shell structure body
In, it is more than the active area for the hydraulic pressure for acting on the gear side of the low one side of sliding and acts on the high one side of sliding
The active area of the hydraulic pressure of gear side.
2. a kind of gear pump or motor, including：Gear mesh is intermeshed；And shell structure body, there is storage institute in inside
The gear receiving room of gear mesh is stated, and slides and connects respectively in the two sides of the inside of the gear receiving room and the gear mesh
It touches, the gear pump or motor are characterized in that：
In sliding between the gear mesh and the shell structure body, make the gear side for acting on the low one side of sliding
Hydraulic pressure active area be more than act on the high one side of sliding gear side hydraulic pressure active area.
3. a kind of gear pump or motor, including：Gear mesh is intermeshed；Shell structure body has in inside and stores the tooth
The gear receiving room of wheel pair；And two side plates, be configured to the inside of the gear receiving room respectively with the gear mesh
Two sides sliding contact；The gear pump or motor are characterized in that：
In sliding between the gear mesh and described two side plates, make the gear side for acting on the low one side of sliding
Hydraulic pressure active area be more than act on the high one side of sliding gear side hydraulic pressure active area.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/064132 WO2015181908A1 (en) | 2014-05-28 | 2014-05-28 | Gear pump or motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106471253A CN106471253A (en) | 2017-03-01 |
| CN106471253B true CN106471253B (en) | 2018-05-22 |
Family
ID=54698290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480079130.7A Active CN106471253B (en) | 2014-05-28 | 2014-05-28 | gear pump or motor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6226067B2 (en) |
| CN (1) | CN106471253B (en) |
| TW (1) | TWI586892B (en) |
| WO (1) | WO2015181908A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102231824B1 (en) * | 2017-10-13 | 2021-03-24 | 가부시키가이샤 시마쓰세사쿠쇼 | Gear pump or motor |
| WO2020165963A1 (en) * | 2019-02-13 | 2020-08-20 | 株式会社島津製作所 | Gear pump or motor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6331273U (en) * | 1986-08-12 | 1988-02-29 | ||
| TW468002B (en) * | 2000-04-13 | 2001-12-11 | Bosch Gmbh Robert | Gear-wheel pump, in particular for a high-pressure fuel pump |
| CN201047347Y (en) * | 2007-06-04 | 2008-04-16 | 胡远祥 | External gear type oil pump |
| CN101379295A (en) * | 2006-02-20 | 2009-03-04 | 岛津麦库泰姆株式会社 | Gear pump |
| CN102128165A (en) * | 2011-03-27 | 2011-07-20 | 长治液压有限公司 | Dual-oil inlet hydraulic gear pump |
| JP2012202254A (en) * | 2011-03-24 | 2012-10-22 | Hitachi Automotive Systems Ltd | Pump device |
| JP2013181446A (en) * | 2012-03-01 | 2013-09-12 | Sumitomo Precision Prod Co Ltd | Hydraulic device |
| TW201350681A (en) * | 2012-06-11 | 2013-12-16 | Shimadzu Corp | Gear pump and motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5441873B2 (en) * | 2010-12-01 | 2014-03-12 | 日立オートモティブシステムズ株式会社 | External gear pump |
-
2014
- 2014-05-28 WO PCT/JP2014/064132 patent/WO2015181908A1/en active Application Filing
- 2014-05-28 JP JP2016523026A patent/JP6226067B2/en active Active
- 2014-05-28 CN CN201480079130.7A patent/CN106471253B/en active Active
-
2015
- 2015-05-19 TW TW104115869A patent/TWI586892B/en active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6331273U (en) * | 1986-08-12 | 1988-02-29 | ||
| TW468002B (en) * | 2000-04-13 | 2001-12-11 | Bosch Gmbh Robert | Gear-wheel pump, in particular for a high-pressure fuel pump |
| CN101379295A (en) * | 2006-02-20 | 2009-03-04 | 岛津麦库泰姆株式会社 | Gear pump |
| CN201047347Y (en) * | 2007-06-04 | 2008-04-16 | 胡远祥 | External gear type oil pump |
| JP2012202254A (en) * | 2011-03-24 | 2012-10-22 | Hitachi Automotive Systems Ltd | Pump device |
| CN102128165A (en) * | 2011-03-27 | 2011-07-20 | 长治液压有限公司 | Dual-oil inlet hydraulic gear pump |
| JP2013181446A (en) * | 2012-03-01 | 2013-09-12 | Sumitomo Precision Prod Co Ltd | Hydraulic device |
| TW201350681A (en) * | 2012-06-11 | 2013-12-16 | Shimadzu Corp | Gear pump and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI586892B (en) | 2017-06-11 |
| CN106471253A (en) | 2017-03-01 |
| TW201544706A (en) | 2015-12-01 |
| JPWO2015181908A1 (en) | 2017-04-20 |
| WO2015181908A1 (en) | 2015-12-03 |
| JP6226067B2 (en) | 2017-11-08 |
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