CN106930995B - A kind of compression apparatus for adjusting force of plunger hydraulic element - Google Patents
A kind of compression apparatus for adjusting force of plunger hydraulic element Download PDFInfo
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- CN106930995B CN106930995B CN201710320179.2A CN201710320179A CN106930995B CN 106930995 B CN106930995 B CN 106930995B CN 201710320179 A CN201710320179 A CN 201710320179A CN 106930995 B CN106930995 B CN 106930995B
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- oil duct
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- mounting hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
Abstract
The present invention relates to a kind of compression apparatus for adjusting force of plunger hydraulic element,Including plunger pallet,Valve plate and bearing device,It further include pressing force adjusting part,The pressing force adjusting part is set on valve plate or on bearing device,Pass through the pressing force adjusting part being installed in mounting hole,High pressure oil can be introduced between the plunger pallet and valve plate with relative rotation or be introduced between valve plate and bearing device,Pass through the introducing of high pressure oil,A part of frictional force of Port Plate Pair can be offset,And then it can ensure under the premise of suitable residual clamping force coefficient,Reduce the frictional force between valve plate and plunger case or reduces the frictional force between valve plate and bearing device,Avoid the generation of " burning disk " phenomenon,Simultaneously,Leakage rate will not be caused to increase because the gap between Port Plate Pair is excessive,It ensure that volumetric efficiency.
Description
Technical field
The present invention relates to technical field of hydraulic pressure more particularly to a kind of compression apparatus for adjusting force of plunger hydraulic element.
Background technology
Plunger hydraulic element includes mainly axial plunger pump（Motor）, floating-cup type hydraulic pump（Motor）With based on the above two
Hydraulic transformer etc., above-mentioned Hydraulic Elements Port Plate Pair in the design process, generally use residual clamping force factor design
Principle.Residual clamping force coefficient is very big for the performance influence of Port Plate Pair, if residual clamping force coefficient is excessive, valve plate
With the increased friction of plunger case, mechanical efficiency reduces, or even will appear " burning disk "；If residual clamping force coefficient is too small,
Valve plate and plunger case fit clearance is excessive that leakage rate is caused to increase, volumetric efficiency reduces.It is remaining according to current design method
It compresses force coefficient and depends on the structure sizes such as diameter of plunger and valve plate kidney slot, therefore shape in elements such as radial plunger pumps
Afterwards, residual clamping force coefficient will be unable to change, and seriously affect the entirety of the elements such as lubrication property and the radial plunger pump of Port Plate Pair
Efficiency.
Therefore, how to prevent in plunger hydraulic element Port Plate Pair friction excessive, avoid " burning disk ", be current this field skill
Art personnel's technical issues that need to address.
Invention content
In order to solve the above technical problems, the present invention provides a kind of compression apparatus for adjusting force of plunger hydraulic element, the dress
Setting can be efficiently against the technical problems existing in the prior art.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of pressing force adjusting dress of plunger hydraulic element
It sets, including plunger pallet, valve plate and bearing device；The plunger pallet is circumferentially with multiple cavitys for accommodating plunger
Structure；High pressure kidney slot and low pressure kidney slot are offered on the valve plate；The bearing device is equipped with high-pressure oil passage and low
Pressure oil road；The plunger pallet, the valve plate and the bearing device are bonded arrangement installation successively；Unlike the prior art
It further includes pressing force adjusting part, mounting hole, the first oil duct and the second oil duct to be, the pressing force adjusting part is installed on institute
It states in mounting hole, the mounting hole, first oil duct and second oil duct are opened on the valve plate；Described first
The Single port of oil duct is communicated in the mounting hole, and another port is communicated in the top surface and/or bottom surface of the valve plate；Described second
The Single port of oil duct is communicated in the high pressure kidney slot, and another port is communicated in the mounting hole；The pressing force adjusting part
Including spool, elastic damping unit, the lateral surface of the spool is connected with the mounting hole, and can be in the mounting hole
Free to slide, the side of the spool offers first annular groove, and one end of the spool is overcoming institute after by outer power drive
The elastic force for stating elastic damping unit moves axially in the mounting hole, and then the first annular groove is oily by described first
Road and the conducting of the second oil duct, after external force reduces or loses, the elastic damping unit goes back to the spool top, and then described in disconnection
Conducting between first oil duct and second oil duct.
Based on the above technical solution, the present invention can also improve further below.
Further, the elastic damping unit is spring, and the spool is cylinder, and offers bullet on one bottom surface
Spring putting hole, the spring part are positioned in the spring putting hole, and rest part is exposed at the outer of the spring putting hole
Portion.
Further, the pressing force adjusting part further includes fixed block, and the fixed block is fixedly installed in the mounting hole
Hole at the top of, the spool is installed on the hole bottom of the mounting hole, and the spool does not open up the one of the spring putting hole
Bottom surface is bonded with the fixed block, and one end of the spring and the bottom of the mounting hole offset；The fixed block and the valve
Core fitting opens up dynamic hole on one side, and jacking block built in the power hole, the jacking block is connected with the power hole, described
The lateral wall of fixed block offers second annular groove, and the hole underrun of the second annular groove and the power hole
Third oil duct is connected, and the 4th oil duct, Single port and the high pressure kidney-shaped of the 4th oil duct are offered on the valve plate
Slot is connected to, and another port connects with the second annular groove；High pressure oil in the high pressure kidney slot is through the 4th oil duct
Enter power hole bottom into the second annular groove, then through the third oil duct, the jacking block is jacked up, the top
Block slides after driving the spool and compressed spring in the mounting hole, after sliding the first annular groove simultaneously with it is described
First oil duct and second oil duct connect.
Further, the bottom hole of the mounting hole offers the first through hole outside connection, the bottom of the spring putting hole
The second through-hole outside connection is offered, and second through-hole will not block aperture by the jacking block.
Further, second oil duct connects with the first annular groove, and the first annular groove has top ring
Shape face and base circle face, and the area in the top annular face is more than the area in the base circle face, first oil
Road is opened in close to the side in the top annular face；High pressure oil in the high pressure kidney slot enters by second oil duct
The first annular groove pushes the spool to be slid in the mounting hole, and the first annular groove moves closer to described
First oil duct, and at the same time the spring is compressed by the spool.
Further, at the initial installation position of the spool, first oil duct is not located at the peace by lateral surface
The port for filling hole side blocks, and first oil duct is connected to through the mounting hole with outer low pressure area.
Further, first oil duct, which is located at the top surface of the valve plate and/or the oil duct junction of bottom surface, is equipped with recess
Groove, the oil duct junction are arranged in the center of groove, and the groove is arc-shaped, and the circular arc and the valve plate are same
The center of circle.
Similar with above-mentioned technical proposal principle, the present invention also provides following technical schemes.
A kind of compression apparatus for adjusting force of plunger hydraulic element, including plunger pallet, valve plate and bearing device；It is described
Plunger pallet is circumferentially with multiple cavity structures for accommodating plunger；High pressure kidney slot and low is offered on the valve plate
Press kidney slot；The bearing device is equipped with high-pressure oil passage and low pressure oil way；It the plunger pallet, the valve plate and described holds
Rest device is bonded arrangement installation successively；Unlike the prior art, further include pressing force adjusting part, mounting hole, the first oil
Road and the second oil duct, the pressing force adjusting part are installed in the mounting hole, the mounting hole, first oil duct and institute
The second oil duct is stated to be opened on the bearing device；The Single port of first oil duct is communicated in the mounting hole, the other end
Mouth is communicated in the one side of the bearing device to connect with the valve plate；The Single port of second oil duct is communicated in the height
Pressure oil road, another port are communicated in the mounting hole；The pressing force adjusting part includes spool, elastic damping unit, described
The lateral surface of spool is connected with the mounting hole, and can be free to slide in the mounting hole, and the side of the spool is opened
Equipped with first annular groove, one end of the spool is in the elastic force for overcoming the elastic damping unit after by outer power drive, in institute
Axial movement in mounting hole is stated, and then first oil duct and the second oil duct are connected the first annular groove, external force reduces
Or after losing, the elastic damping unit goes back to the spool top, so disconnect first oil duct and second oil duct it
Between conducting.
Equally, said program can also have following further improvement project.
Further, the elastic damping unit is spring, and the spool is cylinder, and offers bullet on one bottom surface
Spring putting hole, the spring part are positioned in the spring putting hole, and rest part is exposed at the outer of the spring putting hole
Portion.
Further, the pressing force adjusting part further includes fixed block, and the fixed block is fixedly installed in the mounting hole
Hole at the top of, the spool is installed on the hole bottom of the mounting hole, and the spool does not open up the one of the spring putting hole
Bottom surface is bonded with the fixed block, and one end of the spring and the bottom of the mounting hole offset；The fixed block and the valve
Core fitting opens up dynamic hole on one side, and jacking block built in the power hole, the jacking block is connected with the power hole, described
The lateral wall of fixed block offers second annular groove, and the hole underrun of the second annular groove and the power hole
Third oil duct is connected, and the 4th oil duct, Single port and the high pressure oil of the 4th oil duct are offered on the bearing device
Road is connected to, and another port connects with the second annular groove；High pressure oil in the high-pressure oil passage through the 4th oil duct into
Enter the second annular groove, then enter power hole bottom through the third oil duct, the jacking block is jacked up, the jacking block
It is slid in the mounting hole after driving the spool and compressed spring, the first annular groove is simultaneously with described the after sliding
One oil duct and second oil duct connect.
Further, the bottom hole of the mounting hole offers the first through hole outside connection, the bottom of the spring putting hole
The second through-hole outside connection is offered, and second through-hole will not block aperture by the jacking block.
Further, second oil duct connects with the first annular groove, and the first annular groove has top ring
Shape face and base circle face, and the area in the top annular face is more than the area in the base circle face, first oil
Road is opened in close to the side in the top annular face；High pressure oil in the high-pressure oil passage enters institute by second oil duct
First annular groove is stated, the spool is pushed to be slid in the mounting hole, the first annular groove moves closer to described
One oil duct, and at the same time the spring is compressed by the spool.
Further, at the initial installation position of the spool, first oil duct is not located at the peace by lateral surface
The port for filling hole side blocks, and first oil duct is connected to through the mounting hole with outer low pressure area.
Further, the 5th oil duct is offered on the valve plate, the Single port of the 5th oil duct is located at and the support
The one side that device fits, and connect with first oil duct, the another port of the 5th oil duct is located at the valve plate
The one side to fit with the plunger pallet.
Further, at least one is equipped with the groove of recess, two oil ducts at two oil duct junctions of the 5th oil duct
Mouth is arranged in the center of groove, and the groove is arc-shaped, and the circular arc and the valve plate concentric.
The invention has the advantages that by the pressing force adjusting part being installed in mounting hole, high pressure oil can be drawn
Enter to the plunger pallet with relative rotation and between valve plate or be introduced between valve plate and bearing device, passes through high pressure
The introducing of oil, can offset a part of frictional force of Port Plate Pair, and then can ensure before suitable residual clamping force coefficient
It puts, reduce the frictional force between valve plate and plunger case or reduces the frictional force between valve plate and bearing device, avoid
The generation of " burning disk " phenomenon, meanwhile, leakage rate will not be caused to increase because the gap between Port Plate Pair is excessive, ensure that
Volumetric efficiency.
Description of the drawings
Fig. 1 is that a kind of overall structure of the plunger pump provided by the present invention being equipped with after the compression apparatus for adjusting force is shown
It is intended to；
Fig. 2 is a kind of schematic diagram of the specific embodiment of valve plate in the present invention；
Fig. 3 is the valve plate and a kind of disassemblying structure schematic diagram of pressing force adjusting part；
Fig. 4 is the disassemblying structure schematic diagram of the valve plate and another pressing force adjusting part；
Fig. 5 is a kind of schematic diagram of specific embodiment of the spool；
Fig. 6 to Fig. 9 is that pressing force adjusting part is installed on the schematic cross-sectional view in valve plate；
Figure 10 to Figure 12 is that pressing force adjusting part is installed on the schematic cross-sectional view in rear cover；
Figure 13 to Figure 15 be the pressure-regulating device with three stage structure respectively first section, stage casing, back segment section view knot
Structure schematic diagram；
Figure 16 is the force diagram using plunger case and valve plate after compression apparatus for adjusting force provided by the invention.
Wherein, the piece number in figure is expressed as：
1, shell, 2, bearing, 3, main shaft, 4, plunger pallet, 5, plunger, 6, valve plate, 7, rear cover, 8, plunger cavity, 9, pressure
Clamp force adjusting part, 61, high pressure kidney slot, 62, low pressure kidney slot, 63, groove, 64, first through hole, 65, mounting hole, 66,
One oil duct, the 67, second oil duct, the 68, the 4th oil duct, the 69, the 5th oil duct, 71, high-pressure oil passage, 91, spring, 92, spool, 93, top
Block, 94, fixed block, 95, circlip, 921, first annular groove, 922, spring putting hole, the 923, second through-hole, 941,
Second ring groove, 942, power hole, 943, third oil duct.
Specific implementation mode
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.Below in conjunction with attached drawing to the principle of the present invention
It is described with feature, it should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application
It can be combined with each other.The given examples are served only to explain the present invention, is not intended to limit the scope of the present invention.
Since compression apparatus for adjusting force provided by the present invention can be used for axial plunger pump（Motor）, floating-cup type hydraulic pump
（Motor）It is exactly that all there is Port Plate Pair with Hydraulic Elements, the common trait of this class component such as hydraulic transformer based on the above two,
The present invention is mainly elaborated by taking axial plunger pump as an example below.
Fig. 1 is please referred to, Fig. 1 is a kind of plunger pump provided by the present invention being equipped with after the compression apparatus for adjusting force
Overall structure diagram.In Fig. 1, which includes shell 1, bearing 2, main shaft 3, plunger pallet 4, plunger 5, flow
Disk 6, rear cover 7, main shaft 3 drive plunger pallet 4 to rotate and drive plunger 5 in the stretching and indentation of 8 periodically of plunger cavity, fix
The left and right end face of motionless valve plate 6 is bonded with the left side of the right side of the plunger case of rotation 4 and rear cover 7 respectively, works as plunger
5 in plunger cavity 8 when stretching out, and the low pressure oil of external fuel tank enters plunger cavity 8 by the low pressure kidney slot 62 of valve plate 6, works as column
When plug 5 is pressed into plunger cavity 8, the high pressure oil in plunger cavity 8 is discharged by the high pressure kidney slot 61 of valve plate 6.
A kind of compression apparatus for adjusting force of plunger hydraulic element provided by the present invention includes mainly two kinds of realization sides
Formula, a method of it being mounted to valve plate 6, another kind is mounted to the mode of rear cover 7.
Fig. 2 to Fig. 9 is the mode for being installed on valve plate, in this way, a kind of plunger type liquid provided by the present invention
Press the compression apparatus for adjusting force of element, including plunger pallet 4, valve plate 6 and bearing device；The bearing device is shown in Fig. 1
In axial plunger pump, as rear cover 7, in some other elements, or the zero of support pallet or similar other forms
Part.The plunger pallet 4 is circumferentially with multiple cavity structures for accommodating plunger 5；High pressure is offered on the valve plate 6
Kidney slot 61 and low pressure kidney slot 62；The bearing device is equipped with high-pressure oil passage 71 and low pressure oil way；The plunger pallet 4,
The valve plate 6 and the bearing device are bonded arrangement installation successively；Further include pressing force adjusting part 9, mounting hole 65, first
Oil duct 66 and the second oil duct 67, the pressing force adjusting part 9 are installed in the mounting hole 65, the mounting hole 65, described
First oil duct 66 and second oil duct 67 are opened on the valve plate 6；The Single port of first oil duct 66 is communicated in
The mounting hole 65, another port are communicated in the top surface or bottom surface of the valve plate 6, or are communicated in two sides simultaneously；Fig. 6 is
First oil duct 66 is communicated in the schematic diagram of top surface, and Fig. 7 is while being communicated in the schematic diagram on two sides.One end of second oil duct 67
Mouth is communicated in the high pressure kidney slot 61, and another port is communicated in the mounting hole 65；The pressing force adjusting part 9 includes valve
Core 92, elastic damping unit, the lateral surface of the spool 92 are connected with the mounting hole 65, and can be in the mounting hole 65
Interior free to slide, the side of the spool 92 offers first annular groove 921, and one end of the spool 92 is by outer power drive
The elastic force for overcoming the elastic damping unit afterwards, the axial movement in the mounting hole 65, and then the first annular groove 921
First oil duct, 66 and second oil duct 67 is connected, external force reduces or after losing, and the elastic damping unit is by the spool
92 push up back, and then disconnect the conducting between first oil duct 66 and second oil duct 67.
Pass through above-mentioned compression apparatus for adjusting force, after entering high pressure oil in the high pressure kidney slot 61 of valve plate 6, original state
Under, due to the plugging action of spool 92, it is not connected between the first oil duct 66 and the second oil duct 67, after spool 92 is by external force,
It can be moved in mounting hole 65, and elasticity of compression damping unit, when the first annular groove 921 on spool 92 is moved to simultaneously
When connecting with the first oil duct 66 and the second oil duct 67, the two is connected, at this point, high pressure oil will flow into Port Plate Pair, and then is produced
A raw plunger case 4 and the separating force between the separating force or valve plate 6 and rear cover 7 of valve plate 6, reduce plunger case 4 and match
The pressing force of flow table 6, or reduce the pressing force between valve plate 6 and rear cover 7, friction is reduced, the hair of " burning disk " phenomenon is avoided
It is raw.
The elastic damping unit can be able to be made of rubber material, or spring there are many embodiment
91, at this point it is possible to be to be designed as cylinder, and spring putting hole 922 is offered on one bottom surface by the spool 92, it is described
91 part of spring is positioned in the spring putting hole 922, and rest part is exposed at the outside of the spring putting hole 922, this
Sample may insure the stabilization elastic force of spring.
Also there are many embodiments for pressing force adjusting part, in a kind of preferred embodiment, such as institute in Fig. 3, Fig. 6, Fig. 7
Show, the pressing force adjusting part 9 further includes fixed block 94, and the fixed block 94 is fixedly installed in the hole top of the mounting hole 65
Portion, the spool 92 are installed on the hole bottom of the mounting hole 65, and the spool 92 does not open up the spring putting hole 922
One bottom surface is bonded with the fixed block 94, and one end of the spring 91 and the bottom of the mounting hole 65 offset；The fixed block
94 be bonded with the spool 92 open up dynamic hole 942 on one side, jacking block 93 built in the power hole 942, the jacking block 93 with
The power hole 942 is connected, and the lateral wall of the fixed block 94 offers second annular groove 941, and described second
Annular groove 941 is connected with the hole underrun third oil duct 943 in the power hole 942, and is offered on the valve plate 6
The Single port of four oil ducts 68, the 4th oil duct 68 is connected to the high pressure kidney slot 61, another port and second annular
Groove 941 connects；High pressure oil in the high pressure kidney slot 61 enters the second annular groove through the 4th oil duct 68
941, then enter 942 bottom of power hole through the third oil duct 943, the jacking block 93 is jacked up, the jacking block 93 drives
Slid in the mounting hole 65 after the spool 92 and compressed spring 91, after sliding the first annular groove 921 simultaneously with
First oil duct 66 and second oil duct 67 connect.
In the embodiment of above-mentioned pressing force component, therefore, to assure that fixed block 94 is fixed, therefore, can will be installed
Hole 65 is designed as step-like, one end of fixed block 65 is mutually butted on step, the other end is placed at the aperture of mounting hole 65, uses bullet
Property baffle ring 95 is fixed.
Since spool 92 is installed on the hole bottom part of mounting hole 65, and its outer wall and hole inner wall are connected, so
In order to ensure spool energy normal movement, avoids not moving due to generating negative pressure, the bottom hole of the mounting hole 65 can be opened
Equipped with the first through hole 64 outside connection, the bottom of the spring putting hole 922 offers the second through-hole 923 outside connection,
And second through-hole 923 will not block aperture by the jacking block 93.In this way, when spool 92 by it is open-top after, spool 92 and solid
Determine to form negative pressure between block 94, it can be by the fluid in outer low pressure area from the spring putting hole 922 of 64 inhalation valve 92 of first through hole
It is interior, and then entered between spool 92 and fixed block 94 by the second through-hole 923 again, to keep internal and external pressure balance, it is ensured that spool
62 normal movement.
Fig. 8 and Fig. 9 is the another embodiment schematic diagram of pressing force component 9, in as shown in the figure, second oil duct 67
Connecting with the first annular groove 921, the first annular groove 921 has top annular face and base circle face, and
The area in the top annular face is more than the area in the base circle face, to form pressure difference.First oil duct 66 opens up
In the side close to the top annular face；High pressure oil in the high pressure kidney slot 61 enters institute by second oil duct 67
First annular groove 921 is stated, the spool 92 is pushed to be slid in the mounting hole 65, the first annular groove 921 is gradual
Close to first oil duct 66, and at the same time the spring 91 is compressed by the spool 92.
For above two pressing force adjusting part 9, spool 92 can do different variations, by taking Fig. 8 as an example, this knot
Under structure, the first oil duct 66 is located at the aperture in mounting hole 65 and blocked by spool 92 in the initial state, at this point, high pressure oil into
Before entering Port Plate Pair, it is not connected to always with outer low pressure area between Port Plate Pair；In structure as shown in Figure 9, in the spool
When 92 initial installation position, the port that first oil duct 66 is not located at 65 side of the mounting hole by lateral surface blocks,
First oil duct 66 is connected to through the mounting hole 65 with outer low pressure area, under this structure, enters high pressure kidney-shaped in high pressure oil
After slot, when pressure in the higher-pressure region of valve plate 6 is by low increase, the axial force of spool 92 also increases, then 92 meeting of spool
Compressed spring 91 is slided, and valve plate 6 is connected to low-pressure area first with the Port Plate Pair on 4 contact surface of plunger pallet, such as Figure 13
It is shown, it is then obstructed with high and low pressure, it as shown in figure 14, is finally connected to higher-pressure region, as shown in figure 15.Lead to flow in this way
There is " ladder-like " increase of three-stage to the reaction force of plunger pallet 4 in disk 6, then plunger pallet 4 presses the residue of valve plate 6
Accordingly there is " ladder-like " reduction of three-stage in clamp force coefficient, prevents Port Plate Pair friction excessive, avoids " burning disk "；Conversely, high pressure waist
When pressure oil in shape slot 61 is reduced by height, there is " ladder-like " increase of three-stage in residual clamping force coefficient, prevents Port Plate Pair from letting out
Leakage increases, and improves efficiency.
When the first oil duct 66 is located at the aperture in mounting hole 65 and blocked by spool 92 in the initial state, plunger at this time
Pallet 4 two-part " ladder-like " can occurs to the residual clamping force coefficient of valve plate 6 and be decreased or increased, and can also preferably avoid
It rubs excessive, and promotes whole efficiency.
In above-mentioned various schemes, in order to which the pressure adjusted in Port Plate Pair is better achieved, in first oil duct 66
The groove 63 of recess is equipped at the oil duct junction of the top surface of the valve plate 6 and/or bottom surface, the groove 63 is arc-shaped, and
And preferably above-mentioned oil duct junction is arranged in the center of groove 63, and the circular arc and 6 concentric of the valve plate, such as Fig. 2 or
Shown in Fig. 4.
Since core of the invention is, how the oil of higher-pressure region to be introduced into Port Plate Pair, and plunger pallet 4, flow
Two Port Plate Pairs are formd between disk 6 and bearing device three passes through phase after pressing force adjusting part 9 is installed in valve plate 6
The oil circuit answered opens up, and invention effect may be implemented, same principle can also be by the pressing force adjusting part in said program
It is installed in bearing device, still by taking axial plunger pump shown in FIG. 1 as an example, wherein bearing device is rear cover 7. Figure 10 to Figure 12
As pressing force adjusting part is installed on the schematic cross-sectional view in rear cover.In this kind of structure, since rear cover 7 is located at flow
The bottom surface side of disk 6 needs in order to which fluid to be introduced into the Port Plate Pair between plunger pallet 4 and valve plate 6 in valve plate 6
The 5th oil duct 69 is inside opened up, this structure does not have between valve plate 6 and rear cover 7 element relatively rotated.
Since principle is similar, the structure being set in rear cover 7 for pressing force adjusting part 9 at this does not do repeated explanation,
Its structure type can refer to the above-mentioned structure type being installed in valve plate 6.
No matter pressing force adjusting part 9 is installed in valve plate 6 or rear cover 7, can be arranged it is multiple, as Fig. 2, Fig. 3,
Shown in Fig. 4, three are could be provided as, corresponding mounting hole 65 and groove 63 are also three, to facilitate installation, also for just
In the connection of related oil circuit, mounting hole 65 can be arranged in the exterior circumference of 61 place circumference of high pressure kidney slot；Similarly, if
When setting groove 63, one of them can be arranged near the high pressure kidney slot 61 at middle part, other two is symmetrically arranged at
The both sides of connecting line between port center on valve plate/bearing device axle center and intermediate groove 63.Use three pressing force tune
Save component when, as shown in figure 3, can one of them be arranged near the high pressure kidney slot 61 at middle part, be denoted as E2, other two point
Not in the both sides of the axis by the component, it is denoted as E1 and E3, and E1 and E3 is about the axisymmetrical.The pressing force tune at middle part
The operating pressure for saving the spring in component is P2, and the operating pressure of the spring in two pressing force adjusting parts being arranged symmetrically is
P1, and P1<P2.
Thus, as described in Figure 16, as operating pressure P<When P1, as pressure P increases, valve plate 6 and plunger pallet 4
Separating force change according to curve ab, as operating pressure P=P1, pressing force adjusting part E1, E3 at is started to work, and is detached
Power increases to c points by b points " staged ", as operating pressure P1<P<When P2, as pressure P increases, separating force becomes according to curve cd
Change, as operating pressure P=P2, pressing force adjusting part is started to work at E2, and separating force increases to e points by d points " staged ",
As operating pressure P>When P2, separating force according to curve ef change, using compress apparatus for adjusting force separation force curve abcdef and
It is not compared using the separation force curve ag for compressing apparatus for adjusting force, separation force curve abcdef and the difference for compressing force curve mn
Smaller, the residual clamping force smaller of the two, reduces friction, avoids " burning disk ".
In the description of the present invention, it is to be understood that, term "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside", " circumferential direction " is side based on ... shown in the drawings
Position or position relationship, are merely for convenience of description of the present invention and simplification of the description, do not indicate or imply the indicated device or member
Part must have a particular orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (15)
1. a kind of compression apparatus for adjusting force of plunger hydraulic element, including plunger pallet (4), valve plate (6) and bearing device；
The plunger pallet (4) is circumferentially with multiple cavity structures for accommodating plunger (5)；
High pressure kidney slot (61) and low pressure kidney slot (62) are offered on the valve plate (6)；
The bearing device is equipped with high-pressure oil passage (71) and low pressure oil way；
The plunger pallet (4), the valve plate (6) and the bearing device are bonded arrangement installation successively；
It is characterized in that, further include pressing force adjusting part (9), mounting hole (65), the first oil duct (66) and the second oil duct (67),
The pressing force adjusting part (9) is installed in the mounting hole (65), the mounting hole (65), first oil duct (66) and
Second oil duct (67) is opened on the valve plate (6)；The Single port of first oil duct (66) is communicated in the peace
It fills hole (65), another port is communicated in the top surface and/or bottom surface of the valve plate (6)；The Single port of second oil duct (67)
It is communicated in the high pressure kidney slot (61), another port is communicated in the mounting hole (65)；
The pressing force adjusting part (9) includes spool (92), elastic damping unit, the lateral surface of the spool (92) with it is described
Mounting hole (65) is connected, and can be free to slide in the mounting hole (65), and the side of the spool (92) offers the
One annular groove (921), one end of the spool (92) in the elastic force for overcoming the elastic damping unit after by outer power drive,
Axial movement in the mounting hole (65), and then the first annular groove (921) is oily by first oil duct (66) and second
Road (67) is connected, and external force reduces or after losing, and the spool (92) push up back by the elastic damping unit, and then disconnection described the
Conducting between one oil duct (66) and second oil duct (67).
2. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 1, which is characterized in that the bullet
Property damping unit be spring (91), the spool (92) is cylinder, and spring putting hole is offered on one bottom surface
(922), spring (91) part is positioned in the spring putting hole (922), and rest part is exposed at the spring and places
The outside in hole (922).
3. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 2, which is characterized in that the pressure
Clamp force adjusting part (9) further includes fixed block (94), and the fixed block (94) is fixedly installed in the hole top of the mounting hole (65)
Portion, the spool (92) are installed on the hole bottom of the mounting hole (65), and the spool (92) does not open up the spring and places
One bottom surface in hole (922) is bonded with the fixed block (94), the bottom of one end and the mounting hole (65) of the spring (91)
It offsets；
What the fixed block (94) was bonded with the spool (92) opens up dynamic hole (942) on one side, and the power hole (942) is interior
Top set block (93), the jacking block (93) are connected with the power hole (942), and the lateral wall of the fixed block (94) offers
Second annular groove (941), and the hole underrun third of the second annular groove (941) and the power hole (942)
Oil duct (943) is connected, and offers the 4th oil duct (68) on the valve plate (6), the Single port of the 4th oil duct (68) with
High pressure kidney slot (61) connection, another port connects with the second annular groove (941)；
High pressure oil in the high pressure kidney slot (61) enters the second annular groove (941) through the 4th oil duct (68),
Enter power hole (942) bottom through the third oil duct (943) again, the jacking block (93) is jacked up, the jacking block (93)
It is slid in the mounting hole (65) after driving the spool (92) and compressed spring (91), the first annular groove after sliding
(921) while with first oil duct (66) and second oil duct (67) connect.
4. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 3, which is characterized in that the peace
The bottom hole of dress hole (65) offers the first through hole (64) outside connection, and the bottom of the spring putting hole (922) offers company
Lead to external the second through-hole (923), and second through-hole (923) will not block aperture by the jacking block (93).
5. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 2, which is characterized in that described
Two oil ducts (67) connect with the first annular groove (921), and the first annular groove (921) has top annular face and bottom
Portion's annular surface, and the area in the top annular face is more than the area in the base circle face, and first oil duct (66) is opened
It is provided close to the side in the top annular face；High pressure oil in the high pressure kidney slot (61) passes through second oil duct (67)
Into the first annular groove (921), the spool (92) sliding in the mounting hole (65) is pushed, it is described first annular
Groove (921) moves closer to first oil duct (66), and at the same time the spring (91) is compressed by the spool (92).
6. a kind of compression apparatus for adjusting force of plunger hydraulic element according to any one of claims 1 to 5, feature exist
In at the initial installation position of the spool (92), first oil duct (66) is not located at the mounting hole by lateral surface
(65) port of side blocks, and first oil duct (66) is connected to through the mounting hole (65) with outer low pressure area.
7. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 6, which is characterized in that described
One oil duct (66) is located at the groove (63) that recess is equipped at the top surface of the valve plate (6) and/or the oil duct junction of bottom surface, the oil
In the center of groove (63), the groove (63) is arc-shaped, and the arc groove and the valve plate for road junction setting
(6) concentric.
8. a kind of compression apparatus for adjusting force of plunger hydraulic element, including plunger pallet (4), valve plate (6) and bearing device；
The plunger pallet (4) is circumferentially with multiple cavity structures for accommodating plunger (5)；
High pressure kidney slot (61) and low pressure kidney slot (62) are offered on the valve plate (6)；
The bearing device is equipped with high-pressure oil passage (71) and low pressure oil way；
The plunger pallet (4), the valve plate (6) and the bearing device are bonded arrangement installation successively；
It is characterized in that, further include pressing force adjusting part (9), mounting hole (65), the first oil duct (66) and the second oil duct (67),
The pressing force adjusting part (9) is installed in the mounting hole (65), the mounting hole (65), first oil duct (66) and
Second oil duct (67) is opened on the bearing device；The Single port of first oil duct (66) is communicated in the installation
Hole (65), another port are communicated in the one side of the bearing device to connect with the valve plate (6)；Second oil duct (67)
Single port be communicated in the high-pressure oil passage (71), another port is communicated in the mounting hole (65)；
The pressing force adjusting part (9) includes spool (92), elastic damping unit, the lateral surface of the spool (92) with it is described
Mounting hole (65) is connected, and can be free to slide in the mounting hole (65), and the side of the spool (92) offers the
One annular groove (921), one end of the spool (92) in the elastic force for overcoming the elastic damping unit after by outer power drive,
Axial movement in the mounting hole (65), and then the first annular groove (921) is oily by first oil duct (66) and second
Road (67) is connected, and external force reduces or after losing, and the spool (92) push up back by the elastic damping unit, and then disconnection described the
Conducting between one oil duct (66) and second oil duct (67).
9. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 8, which is characterized in that the bullet
Property damping unit be spring (91), the spool (92) is cylinder, and spring putting hole is offered on one bottom surface
(922), spring (91) part is positioned in the spring putting hole (922), and rest part is exposed at the spring and places
The outside in hole (922).
10. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 9, which is characterized in that described
Pressing force adjusting part (9) further includes fixed block (94), and the fixed block (94) is fixedly installed in the hole of the mounting hole (65)
Top, the spool (92) are installed on the hole bottom of the mounting hole (65), and the spool (92) does not open up the spring and puts
The bottom surface for setting hole (922) is bonded with the fixed block (94), the bottom of one end and the mounting hole (65) of the spring (91)
Portion offsets；
What the fixed block (94) was bonded with the spool (92) opens up dynamic hole (942) on one side, and the power hole (942) is interior
Top set block (93), the jacking block (93) are connected with the power hole (942), and the lateral wall of the fixed block (94) offers
Second annular groove (941), and the hole underrun third of the second annular groove (941) and the power hole (942)
Oil duct (943) is connected, and the 4th oil duct (68), the Single port of the 4th oil duct (68) and institute are offered on the bearing device
High-pressure oil passage (71) connection is stated, another port connects with the second annular groove (941)；
High pressure oil in the high-pressure oil passage (71) enters the second annular groove (941) through the 4th oil duct (68), then
Enter power hole (942) bottom through the third oil duct (943), the jacking block (93) is jacked up, jacking block (93) band
It is slid in the mounting hole (65) after moving the spool (92) and compressed spring (91), the first annular groove after sliding
(921) while with first oil duct (66) and second oil duct (67) connect.
11. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 10, which is characterized in that described
The bottom hole of mounting hole (65) offers the first through hole (64) outside connection, and the bottom of the spring putting hole (922) offers
The second through-hole (923) outside connection, and second through-hole (923) will not block aperture by the jacking block (93).
12. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 9, which is characterized in that described
Second oil duct (67) connects with the first annular groove (921), the first annular groove (921) have top annular face and
Base circle face, and the area in the top annular face is more than the area in the base circle face, first oil duct (66)
It is opened in close to the side in the top annular face；High pressure oil in the high-pressure oil passage (71) passes through second oil duct (67)
Into the first annular groove (921), the spool (92) sliding in the mounting hole (65) is pushed, it is described first annular
Groove (921) moves closer to first oil duct (66), and at the same time the spring (91) is compressed by the spool (92).
13. according to a kind of compression apparatus for adjusting force of plunger hydraulic element of claim 8 to 12 any one of them, feature
It is, at the initial installation position of the spool (92), first oil duct (66) is not located at the installation by lateral surface
The port of hole (65) side blocks, and first oil duct (66) is connected to through the mounting hole (65) with outer low pressure area.
14. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 13, which is characterized in that described
The 5th oil duct (69) is offered on valve plate (6), the Single port of the 5th oil duct (69) is located to be affixed with the bearing device
The one side of conjunction, and connect with first oil duct (66), the another port of the 5th oil duct (69) is located at the valve plate
(6) one side to fit with the plunger pallet (4).
15. a kind of compression apparatus for adjusting force of plunger hydraulic element according to claim 14, which is characterized in that described
At least one is equipped with the groove (63) of recess at two oil duct junctions of the 5th oil duct (69), and two oil duct junctions are arranged in groove
(63) center, the groove (63) are arc-shaped, and the arc groove and the valve plate (6) concentric.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710320179.2A CN106930995B (en) | 2017-05-09 | 2017-05-09 | A kind of compression apparatus for adjusting force of plunger hydraulic element |
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| CN201710320179.2A CN106930995B (en) | 2017-05-09 | 2017-05-09 | A kind of compression apparatus for adjusting force of plunger hydraulic element |
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| CN106930995B true CN106930995B (en) | 2018-09-25 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108386413A (en) * | 2018-05-09 | 2018-08-10 | 哈尔滨理工大学 | A kind of valve plate of super-low speed continuous rotary sliding-vane motor |
| CN109578358B (en) * | 2018-12-12 | 2023-12-26 | 无锡鹰贝精密液压有限公司 | Bimetal valve plate |
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