CN106438255A - Coaxial and same-side compact type variable structure applicable to bidirectional variable-displacement plunger pump - Google Patents
Coaxial and same-side compact type variable structure applicable to bidirectional variable-displacement plunger pump Download PDFInfo
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- CN106438255A CN106438255A CN201610966596.XA CN201610966596A CN106438255A CN 106438255 A CN106438255 A CN 106438255A CN 201610966596 A CN201610966596 A CN 201610966596A CN 106438255 A CN106438255 A CN 106438255A
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- variable valve
- variable
- valve element
- mouth
- plunger pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a coaxial and same-side compact type variable structure applicable to a bidirectional variable-displacement plunger pump, which is used for changing an inclined angle of an inclined disc of the bidirectional variable-displacement plunger pump. The structure comprises a variable valve element connecting rod pin, a variable valve element connecting rod, a variable spring, a variable valve element, a spring gasket, a variable valve sleeve and a screw plug, wherein the variable spring, the variable valve element and the variable valve sleeve are coaxially mounted on the same side of the inclined disc, and occupy a very small space volume. The size of a variable valve sleeve step hole and the size of three sections of external circles of the variable valve element can guarantee that the effective area of high-pressure oil on the variable valve element is not changed when an oil inlet and an oil outlet are exchanged due to reversing of the bidirectional variable-displacement plunger pump, that is to say that variable properties are the same in forward rotation and backward rotation process of the bidirectional variable-displacement plunger pump. According to the coaxial and same-side compact type variable structure, oil of the oil inlet and the oil outlet is directly introduced into the variable valve sleeve, so that a variable-displacement mechanism that the displacement of the bidirectional variable-displacement plunger pump is changed along linear changes of load pressure is realized, and the change amplitude is determined by the rigidity of the variable spring.
Description
Technical field
The present invention relates to a kind of variant structural of plunger displacement pump, particularly in aviation field, it is applied to two-way change displacement plunger pump
Coaxial homonymy compact variant structural.
Background technology
It is transmitted to the differentiation of power-by-wire with aircraft system by power liquid, electric hydrostatic actuator instead of the liquid of parts of traditional
Pressure system, and the bidirectional ram pump in electric hydrostatic actuator also presents to the high rotating speed of high pressure, high-power, high power to weight ratio, compact light
The directions such as quantization, low-pressure pulsation are developed.Pressurized strut reciprocating stroke in electric hydrostatic actuator is rotated forward by bidirectional ram pump and anti-
Transfer realization, the discharge capacity of pressurized strut required bidirectional ram pump under different load pressures is different, its displacement variation needs and bears
Carry pressure linear.Therefore, the bidirectional ram pump in electric hydrostatic actuator needs a kind of variant structural, has in space resources
Try one's best in the case of limit compact lightweight, realize no matter rotating forward or there are identical variable characteristics during reversion.
The structure increasing swash plate angle of inclination and reduction swash plate angle of inclination is separately pacified by traditional plunger displacement pump variant structural
Put, be respectively placed in the top and bottom of swash plate, be i.e. homonymy not placed coaxial, or be concurrently placed at one end of swash plate but be located at swash plate two
Side, i.e. coaxial not homonymy arrangement.So larger space volume will be occupied, be unfavorable for that two-way change displacement plunger pump realizes Gao Gongchong
Than.
Content of the invention
Present invention aims to the deficiencies in the prior art, provide and a kind of be applied to the same of two-way change displacement plunger pump
Axle homonymy compact variant structural, realizes discharge capacity with load pressure linear change, and variable characteristics are not with two-way change discharge capacity plunger
Pump direction of rotation changes and changes, compact overall structure and take up room little.
The present invention be employed technical scheme comprise that by its technical problem of solution：A kind of it is applied to two-way change displacement plunger pump
Coaxial homonymy compact variant structural, this structure is used for changing the angle of inclination of the swash plate of two-way change displacement plunger pump, this structure
Including variable valve element link pin, variable valve core link rod, variable spring, variable valve element, spring shim, variable valve pocket and screw plug；
A mouth cavity volume and B mouth cavity volume, A mouth cavity volume and A mouth flow passage, B are had on the housing of described two-way change displacement plunger pump
Mouth cavity volume and B mouth flow passage, A mouth runner is that during the oil-in of two-way change displacement plunger pump, B mouth runner is oil-out, A mouth stream
Road is that during the oil-out of two-way change displacement plunger pump, B mouth runner is oil-in；
Described swash plate upper end processes connecting rod fit, and on connecting rod fit two side, machining shape is in the same size and axle
To position corresponding round end flat key slit-like through-holes, variable valve element link pin sequentially passes through first round end flat key slit-like through-holes, change
Through hole on amount valve core link rod and second round end flat key slit-like through-holes, and tangent with two round end flat key slit-like through-holes inwalls,
And hinged with the through hole on variable valve core link rod, variable valve core link rod can be with variable valve core link rod pin along round end flat key slit-like through-holes
Inwall slides up and down；
Described variable valve element link pin is by axial limiting；
Described variable spring is in compressive state all the time, and one end is close to variable valve element connecting-rod head face, other end
It is close to spring shim, and spring shim is pressed on housing inner convex platform；
The cylindrical cooperation with housing of described variable valve pocket, one side end face is coordinated with housing inner convex platform, another side end face by with
The threaded screw plug of housing is pushed down spacing, and the shoulder hole at variable valve pocket center is by D1 internal diameter valve opening, D2 internal diameter valve opening, D3 internal diameter
Valve opening forms, and the A mouth of variable valve pocket is drawn oily groove and alignd with A mouth cavity volume, and B mouth is drawn oily groove and alignd with B mouth cavity volume, and A mouth draws oil
At least one A mouth radial direction through hole is had on groove, B mouth draws and has at least one B mouth radial direction through hole on oily groove, by A mouth runner
Connect with the shoulder hole at variable valve pocket center with B mouth runner.
Described variable valve element one end and variable valve core link rod are threaded connection, the ladder at the other end and variable valve pocket center
Hole coordinates, and variable valve element has the cylindrical of three sections of different-diameters, and D1 external diameter valve element is cylindrical to be coordinated with D1 internal diameter valve opening gap, D2 external diameter
Valve element is cylindrical to be coordinated with D2 internal diameter valve opening gap, and D3 external diameter valve element is cylindrical to be coordinated with D3 internal diameter valve opening gap, and diameter D1 is less than straight
Footpath D2, diameter D2 are less than diameter D3, and the circular area of diameter D2 deducts the difference of the circular area of diameter D1 equal to diameter D3
Circular area deduct diameter D2 circular area difference, variable center spool has by radial direction through hole and axial center hole group
The variable valve element becoming draws oilhole, has connected variable valve pocket end cavity and housing internal cavity.
Variable spring, variable valve element and variable valve pocket placed coaxial and be respectively positioned on swash plate homonymy, D1 external diameter on variable valve element
The outer distance of round variable spring of valve element is nearest.
Further, the gudgeon of described swash plate both sides and deep groove ball bearing inner ring interference fit, deep groove ball bearing outer ring with
Housing interference fit, swash plate can swing around trunnion axis.
Further, described variable valve element link pin one end has boss spacing, and the other end has through hole, pad endoporus and variable
Valve core link rod pin coordinates, and split pin is installed and blocked pad in through-holes.
Further, described variable valve pocket is cylindrical distributed three sections of o-ring grooves, disposes one in each o-ring groove
Individual O-ring seals, each O-ring seals each side disposes a back-up ring, and in order to seal, A mouth draws oily groove and B mouth draws oil
Pressure oil in groove.
Further, the D1 external diameter valve element of described variable valve element is cylindrical, D2 external diameter valve element is cylindrical, D3 external diameter valve element cylindrical on
Have balancing slit.
The invention has the beneficial effects as follows：The coaxial homonymy compact being applied to two-way change displacement plunger pump that the present invention provides
Variant structural directly the fluid of oil-in and oil-out is introduced in variable valve pocket it is achieved that the discharge capacity of two-way change displacement plunger pump
With the change discharge capacity mechanism of load pressure linear change, amplitude of variation is determined by the rigidity of variable spring；Variant structural is extremely compact,
Variable spring, variable valve element and variable valve pocket placed coaxial and be respectively positioned on swash plate homonymy, the volume that takes up room is very little；Variable flow valve
The size of set shoulder hole and three sections of cylindrical sizes of variable valve element can guarantee that and lead to oil-in in the commutation of two-way change displacement plunger pump
When exchanging with oil-out, the effective area that hydraulic oil acts on variable valve element does not change, and that is, variable characteristics are in two-way change
It is identical when displacement plunger pump rotates and reverse.
Brief description
Fig. 1 (a) is the perspective view of the present invention.
Fig. 1 (b) is the partial enlarged drawing in I portion in Fig. 1 (a).
Fig. 2 is the sectional view of A mouth runner side of the present invention.
Fig. 3 is the sectional view of B mouth runner side of the present invention.
Fig. 4 is part explosive view of the present invention.
In all of the figs, identical reference is used for representing identical part or structure, wherein：
1 swash plate, 1a round end flat key slit-like through-holes, 1b gudgeon, 1c connecting rod fit, 2 deep groove ball bearings,
3 variable valve element link pins, 4 variable valve core link rods, 5 variable springs, 6 variable valve elements, 6a D1 external diameter valve element is cylindrical,
6b D2 external diameter valve element is cylindrical, and 6c D3 external diameter valve element is cylindrical, and 6d variable valve element draws oilhole, 6e balancing slit, 7 spring pads
Piece, 8 variable valve pockets, 8a D1 internal diameter valve opening, 8b D2 internal diameter valve opening, 8c D3 internal diameter valve opening, 8d B mouth radial direction through hole,
8e A mouth radial direction through hole, 8f variable valve pocket end cavity, 8g B mouth draws oily groove, and 8h A mouth draws oily groove, and 9 O shapes are close
Seal, 10 back-up rings, 11 screw plugs, 12 housings, 12a housing inner convex platform, 12b A mouth cavity volume, 12c B mouth cavity volume,
12d B mouth runner, 12e A mouth runner, 13 split pins, 14 pads.
Specific embodiment
1 to 4 the invention will be further described below in conjunction with the accompanying drawings.
A kind of coaxial homonymy compact variant structural being applied to two-way change displacement plunger pump, this structure is used for changing two-way
Become the angle of inclination of the swash plate 1 of displacement plunger pump, this structure includes variable valve element link pin 3, variable valve core link rod 4, variable bullet
Spring 5, variable valve element 6, spring shim 7, variable valve pocket 8 and screw plug 11.
A mouth cavity volume 12b and B mouth cavity volume 12c, A mouth cavity volume 12b and A are had on the housing 12 of described two-way change displacement plunger pump
Mouth runner 12e connection, B mouth cavity volume 12c is connected with B mouth runner 12d, and A mouth runner 12e is the oil-in of two-way change displacement plunger pump
When B mouth runner 12d be oil-out, A mouth runner 12e is that during the oil-out of two-way change displacement plunger pump, B mouth runner 12d is oil-feed
Mouthful.
Left and right gudgeon 1b on described swash plate 1 and deep groove ball bearing 2 inner ring interference fit, deep groove ball bearing 2 outer ring and shell
Body 12 interference fit, swash plate 1 can be around gudgeon 1b axis oscillating；Swash plate 1 upper end processes connecting rod fit 1c, connecting rod fit
On 1c two side, machining shape is in the same size and axial location corresponding round end flat key slit-like through-holes 1a, variable valve element link pin 3
Sequentially pass through first round end flat key slit-like through-holes 1a, the through hole on variable valve core link rod 4 and second round end flat key flute profile to lead to
Hole 1a, and, variable flow valve tangent and hinged with the through hole on variable valve core link rod 4 with two round end flat key slit-like through-holes 1a inwalls
Core connecting rod 4 can slide up and down along round end flat key slit-like through-holes 1a inwall with variable valve core link rod pin 3.
There is boss described variable valve element link pin 3 one end, and the other end has through hole, pad 14 endoporus and variable valve element link pin
3 cooperations, split pin 13 is installed and is blocked pad 14 in through-holes, thus limiting the axial displacement of variable valve element link pin 3.
Described variable spring 5 is in compressive state all the time, and one end is close to variable valve core link rod 4 end face, the other end
Face is close to spring shim 7, and spring shim 7 is pressed on housing inner convex platform 12a.
Described variable valve pocket 8 is cylindrical to be coordinated with housing 12, and its left end face is coordinated with housing inner convex platform 12a, its right end face
Pushed down spacing by the screw plug 11 threadeded with housing 12, the shoulder hole at variable valve pocket 8 center is by D1 internal diameter valve opening 8a, D2 internal diameter
Valve opening 8b, D3 internal diameter valve opening 8c forms, and the A mouth of variable valve pocket 8 is drawn oily groove 8h and alignd with A mouth cavity volume 12b, and B mouth draws oily groove
8g is alignd with B mouth cavity volume 12c, and A mouth draws and has two orthogonal A mouth radial direction through hole 8e on oily groove 8h, and B mouth draws oily groove
Two orthogonal B mouth radial direction through hole 8d are had on 8g, the A mouth runner 12e of two-way change displacement plunger pump and B mouth stream are allowed with this
Fluid in road 12d flows in the shoulder hole at variable valve pocket 8 center.
Described variable valve element 6 one end and variable valve core link rod 4 are threaded connection, the other end and variable valve pocket 8 center
Shoulder hole coordinates, and variable valve element 6 has the cylindrical of three sections of different-diameters, and D1 external diameter valve element cylindrical 6a and D1 internal diameter valve opening 8a joins in gap
Conjunction, the cylindrical 6b of D2 external diameter valve element and the cooperation of D2 internal diameter valve opening 8b gap, the cylindrical 6c of D3 external diameter valve element and D3 internal diameter valve opening 8c gap
Cooperation, diameter D1 is less than diameter D2, and diameter D2 is less than diameter D3, and the circular area of diameter D2 deducts the circular area of diameter D1
Difference be equal to diameter D3 circular area deduct diameter D2 circular area difference it is ensured that in two-way change displacement plunger pump
When commutation leads to oil-in and oil-out to exchange, the effective area that hydraulic oil acts on variable valve element does not change.Variable
Valve element 6 center has the variable valve element being made up of radial direction through hole and axial center hole and draws oilhole 6d, has connected variable valve pocket end
Cavity 8f and housing internal cavity, prevent dead volume produce so that variable valve element 6 in variable valve pocket 8 along axial-movement time-varying
Amount valve pocket end cavity 8f inner fluid can supplement in time or discharge.
Variable spring 5, variable valve element 6 and variable valve pocket 8 placed coaxial and be respectively positioned on swash plate 1 homonymy, D1 on variable valve element 6
The cylindrical 6a of external diameter valve element is apart from variable spring 5 recently it is ensured that hydraulic oil acts on pressure and variable spring on variable valve element 6
The pressure direction of 5 pairs of variable valve core link rods 4 is contrary, and that is, variable spring 5 increases the pressure at its angle of inclination to all the time swash plate 1, becomes
Amount valve element 6 reduces the pulling force at its angle of inclination to all the time swash plate 1.
In the state of not working, swash plate 1 is produced two-way change displacement plunger pump due to the pre compressed magnitude of variable spring 5
Pressure is in maximum tilt angle position, and variable valve element 6 is in maximum and stretches out state.When two-way change displacement plunger pump rotates forward, A mouth
Runner 12e is oil-in, and B mouth runner 12d is oil-out, and the hydraulic oil in B mouth runner 12d flows into B mouth cavity volume 12c, then passes through
B mouth on variable valve pocket 8 draws in the shoulder hole that oily groove 8g and B mouth radial direction through hole 8d flows into variable valve pocket 8 center, acts on change
On the ladder end face of amount valve element 6.During the reversion of two-way change displacement plunger pump, A mouth runner 12e is oil-out, B mouth runner 12d be into
Hydraulic fluid port, the hydraulic oil in A mouth runner 12e flows into A mouth cavity volume 12b, then draws oily groove 8h and A mouth by the A mouth on variable valve pocket 8
Radial direction through hole 8e flows in the shoulder hole at variable valve pocket 8 center, acts on the ladder end face of variable valve element 6.Oil-out high pressure
The active force that oil acts on variable valve element 6 passes through variable valve core link rod 4, variable valve element link pin 3 is delivered to swash plate 1.
When load pressure raises, that is, during oil-out pressure rise, act on the pressure on variable valve element 6 and increase and more than change
Measure the pressure that spring 5 produces to swash plate 1, then variable valve element 6 subtracts to its angle of inclination in the drop-down swash plate of promotion 1 of high-voltage oil liquid
Little direction motion, and variable spring 5 then correspondingly increases decrement, swash plate is produced with bigger pressure with balance variable valve element
The pulling force of 6 generations.During balance, the angle of inclination of swash plate reduces, and the discharge capacity of two-way change displacement plunger pump reduces.When load pressure fall
Low, that is, during oil-out reduced pressure, act on what the pressure on variable valve element 6 reduced and less than variable spring 5, swash plate 1 produced
Pressure, then variable spring 5 promotion variable valve core link rod 4, move in the direction that pressure swash plate 1 increases to its angle of inclination, variable flow valve
Core 6 is also pulled out more elongations, and correspondingly variable spring 5 decrement reduces, and swash plate is produced with less pressure to balance change
The pulling force that amount valve element 6 produces.During balance, the angle of inclination of swash plate increases, and the discharge capacity of two-way change displacement plunger pump increases.To sum up institute
State, this variant structural achieves the change discharge capacity mechanism with load pressure linear change for the discharge capacity of two-way change displacement plunger pump, change
Amplitude is determined by the rigidity of variable spring 5, and variable characteristics are identical when two-way change displacement plunger pump rotates and reverse.
Described variable valve pocket 8 is cylindrical to distributed three sections of o-ring grooves, disposes an O shape sealing in each o-ring groove
Circle 9, each O-ring seals 9 each side disposes one back-up ring 10 in order to seal A mouth and draw oily groove 8h and B mouth draw oily recessed
Pressure oil in groove 8g.
Open on the cylindrical 6c of cylindrical 6b, D3 external diameter valve element of D1 external diameter valve element cylindrical 6a, D2 external diameter valve element of described variable valve element 6
There is balancing slit 6e, promote variable valve element 6 operationally preferably coaxial with variable valve pocket 8 centre bore axis, it is to avoid it is significantly
Tilt.
Claims (5)
1. a kind of coaxial homonymy compact variant structural being applied to two-way change displacement plunger pump, this structure is used for changing two-way change
The angle of inclination of the swash plate (1) of displacement plunger pump it is characterised in that：This structure includes variable valve element link pin (3), variable valve element
Connecting rod (4), variable spring (5), variable valve element (6), spring shim (7), variable valve pocket (8) and screw plug (11)；
A mouth cavity volume (12b) and B mouth cavity volume (12c), A mouth cavity volume (12b) are had on the housing (12) of described two-way change displacement plunger pump
Connect with A mouth runner (12e), B mouth cavity volume (12c) is connected with B mouth runner (12d), A mouth runner (12e) is two-way change discharge capacity post
During the oil-in of plug pump, B mouth runner (12d) is oil-out, and A mouth runner (12e) is B during the oil-out of two-way change displacement plunger pump
Mouth runner (12d) is oil-in；
Described swash plate (1) upper end processing connecting rod fit (1c), machining shape size on connecting rod fit (1c) two side
Consistent and axial location corresponding round end flat key slit-like through-holes (1a), variable valve element link pin (3) sequentially passes through first round end
Through hole on flat key slit-like through-holes (1a), variable valve core link rod (4) and second round end flat key slit-like through-holes (1a), and with two
Round end flat key slit-like through-holes (1a) inwall is tangent, and hinged with the through hole on variable valve core link rod (4), variable valve core link rod (4)
Can slide up and down along round end flat key slit-like through-holes (1a) inwall with variable valve core link rod pin (3)；
Described variable valve element link pin (3) is by axial limiting；
Described variable spring (5) is in compressive state all the time, and one end is close to variable valve core link rod (4) end face, the other end
Face is close to spring shim (7), and spring shim (7) is pressed on housing inner convex platform (12a)；
Described variable valve pocket (8) is cylindrical to be coordinated with housing (12), and one side end face is coordinated with housing inner convex platform (12a), opposite side
End face is pushed down spacing by the screw plug (11) threadeded with housing (12), and the shoulder hole at variable valve pocket (8) center is by D1 internal diameter valve
Hole (8a), D2 internal diameter valve opening (8b), D3 internal diameter valve opening (8c) composition, the A mouth of variable valve pocket (8) is drawn oily groove (8h) and is held with A mouth
Align in chamber (12b), B mouth drawn oily groove (8g) and alignd with B mouth cavity volume (12c), and A mouth draws and has at least one A on oily groove (8h)
Mouthful radial direction through hole (8e), B mouth draws and has at least one B mouth radial direction through hole (8d) on oily groove (8g), by A mouth runner (12e) and B
Mouth runner (12d) is connected with the shoulder hole at variable valve pocket (8) center.
Described variable valve element (6) one end and variable valve core link rod (4) are threaded connection, the other end and variable valve pocket (8) center
Shoulder hole cooperation, variable valve element (6) has the cylindrical of three sections of different-diameters, D1 external diameter valve element cylindrical (6a) and D1 internal diameter valve opening
(8a) gap cooperation, D2 external diameter valve element cylindrical (6b) and D2 internal diameter valve opening (8b) gap coordinate, D3 external diameter valve element cylindrical (6c) with
D3 internal diameter valve opening (8c) gap coordinates, and diameter D1 is less than diameter D2, and diameter D2 is less than diameter D3, and the circular area of diameter D2 subtracts
Go diameter D1 circular area difference be equal to diameter D3 circular area deduct diameter D2 circular area difference, variable flow valve
Core (6) center has the variable valve element being made up of radial direction through hole and axial center hole and draws oilhole (6d), has connected variable valve pocket end
End cavity (8f) and housing internal cavity.
Variable spring (5), variable valve element (6) and variable valve pocket (8) placed coaxial and be respectively positioned on swash plate (1) homonymy, variable valve element
(6) upper D1 external diameter valve element cylindrical (6a) is nearest apart from variable spring (5).
2. the coaxial homonymy compact variant structural being applied to two-way change displacement plunger pump according to claim 1, it is special
Levy and be：The gudgeon (1b) of described swash plate (1) both sides and deep groove ball bearing (2) inner ring interference fit, deep groove ball bearing (2) outer ring
With housing (12) interference fit, swash plate (1) can be around gudgeon (1b) axis oscillating.
3. the coaxial homonymy compact variant structural being applied to two-way change displacement plunger pump according to claim 1, it is special
Levy and be：Described variable valve element link pin (3) one end has boss spacing, and the other end has through hole, pad (14) endoporus and variable flow valve
Core link pin (3) coordinates, and split pin (13) is installed and blocked pad (14) in through-holes.
4. the coaxial homonymy compact variant structural being applied to two-way change displacement plunger pump according to claim 1, it is special
Levy and be：Described variable valve pocket (8) is cylindrical to distributed three sections of o-ring grooves, disposes an O shape close in each o-ring groove
Seal (9), each O-ring seals (9) each side dispose a back-up ring (10) in order to seal A mouth draw oily groove (8h) and
B mouth draws the pressure oil in oily groove (8g).
5. the coaxial homonymy compact variant structural being applied to two-way change displacement plunger pump according to claim 1, it is special
Levy and be：The D1 external diameter valve element cylindrical (6a) of described variable valve element (6), D2 external diameter valve element cylindrical (6b), D3 external diameter valve element are cylindrical
(6c) have balancing slit (6e) on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610966596.XA CN106438255B (en) | 2016-10-28 | 2016-10-28 | Coaxial homonymy compact variant structural suitable for two-way change displacement plunger pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610966596.XA CN106438255B (en) | 2016-10-28 | 2016-10-28 | Coaxial homonymy compact variant structural suitable for two-way change displacement plunger pump |
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| CN106438255A true CN106438255A (en) | 2017-02-22 |
| CN106438255B CN106438255B (en) | 2018-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317118A (en) * | 2018-04-03 | 2018-07-24 | 浙江大学 | A kind of novel clamp button separated column plug pump swash plate variable regulating mechanism and adjusting method |
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| Publication number | Publication date |
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| CN106438255B (en) | 2018-08-07 |
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