CN107407263A - Rotating speed control Variable plunger pump - Google Patents
Rotating speed control Variable plunger pump Download PDFInfo
- Publication number
- CN107407263A CN107407263A CN201680017051.2A CN201680017051A CN107407263A CN 107407263 A CN107407263 A CN 107407263A CN 201680017051 A CN201680017051 A CN 201680017051A CN 107407263 A CN107407263 A CN 107407263A
- Authority
- CN
- China
- Prior art keywords
- thorax
- mentioned
- pump
- plunger
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- F04B1/20—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 having rotary cylinder block
- F04B1/22—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 having rotary cylinder block having two or more sets of cylinders or pistons
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
Abstract
The present invention provides a kind of rotating speed control Variable plunger pump, and the rotating speed control will not cause the reduction of the efficiency of pump, cost to uprise with Variable plunger pump, by forming for simplicity the abnormal pressure in the thorax room of cylinder body can be avoided to occur well.The rotating speed control Variable plunger pump makes each plunger back and forth movement in thorax by the rotation along with cylinder body with stroke corresponding with the angle of inclination of swash plate, so as to, the suction port of valve plate of the working oil through cylinder body sliding contact is drawn into thorax room from the suction oil circuit for being formed at pump body, and discharge aperture of the working oil through valve plate is spued to the discharge oil circuit for being formed at above-mentioned pump body；In the rotating speed control Variable plunger pump, when the pressure in the thorax room between the suction port of above-mentioned valve plate and discharge aperture exceedes pre-determined pressure, the hydraulic circuit for being used to avoid abnormal pressure that the working oil in the thorax room is escaped into outside thorax room is set to be arranged in the same pump housing in a manner of built-in in same unit construction.
Description
Technical field
The present invention relates to 2 capacity variable plunger pumps of such as rotating speed control, in detail, it is related to for avoiding cylinder body
The means of the abnormal pressure of thorax room.
Background technology
In the hydraulic planger pump that various species be present, such as have and rotation driving is carried out by AC servomotor, lead to
The hydraulic planger pump for being controlled to its rotating speed and can changing discharge-amount is crossed, using in order to which rotating speed controls and determines swash plate plunger pump
The hydraulic planger pump of quantization.
In addition, the capacity variable plunger pump of 2 capacity variable plunger pump 100,2 in such rotating speed control plunger pump be present
100 as shown in Fig. 3 loop diagram, may be switched to swash plate angle being set to big angle of inclination by solenoid directional control valve 118
Large Copacity and the low capacity that swash plate angle is set to small angle of inclination.
This inclined disc type plunger pump 100 as shown in the sectional view of figure 4 as, cylinder body 103 with by motor drive rotation
Axle 102 integratedly rotates, and is formed parallel to multiple thoraxes 104 in the inside of cylinder body 103 and rotary shaft 102, swash plate 107 is tiltably
It is supported on rotary shaft 102, each sliding contact of end crawler shoe 106 of plunger 105 that swash plate 107 possesses and is housed in each thorax 104
Inclined plane, with the rotation of rotary shaft 102 and cylinder body 103, each plunger 105 is with row corresponding with the angle of inclination of swash plate 107
Journey reciprocates in thorax 104, and the thorax room 109 formed via thorax 104 and plunger 105 sucks, discharge working oil.
Moreover, in 2 capacity variable plunger pumps 100, above-mentioned swash plate 107 is as shown in Fig. 4 (a) in solenoid directional control valve
The effect of pump discharge pressure is cut off under 118 "on" position, in this case from spring mechanism 116 to as maximum discharge-amount
Big oblique angular position vert loading, in addition, being switched to power off by above-mentioned solenoid directional control valve 118, so as to such as Fig. 4 (b)
A part for pump discharge pressure as shown acts on operation plunger 117, now, operates plunger 117 by this and revolts above-mentioned bullet
The loading force of spring mechanism 116 pushes swash plate 107 to as the small oblique angular position of minimum discharge-amount., can using this 2 capacity type
Make 1 pump that there is the function of 2 pumps, broader use range is obtained by same motor capacity.
In addition, in above-mentioned plunger pump 100, for example, as shown in Figure 5, share out the work oil relative to each thorax room 109
Suction port 113 and discharge aperture 114 be formed as the valve plate 108 of arc-shaped and be fixed in pump cover 120.Discharge aperture 114
And suction port 113 respectively with the pump housing (Japanese：ケ ー シ Application グ) discharge oil circuit 121 and suction oil communication.As each thorax
The kidney-shaped aperture 112 of discharge opening/suction inlet of working oil in room 109 side's cylinder body 103 end face opening, relative to
Flow table 108 slides, and each kidney-shaped aperture 112 overlaps with discharge aperture 114 or suction port 113, is operated discharge/suction of oil
Enter.
In addition, kidney-shaped aperture 112 be usually designed to from suction port 113 be completely transferred into discharge aperture 114 it
Preceding to be cut off relative to suction port 113, the plunger 105 in its corresponding thorax 104 reaches the volume of thorax room 109 after the cut-out
Lower dead center shown in maximum Fig. 4 (b).Therefore, in thorax room 109 after the cut-out of kidney-shaped aperture 112 and suction port 113
The air pocket that pressure reduces the reason for until arrival lower dead center, turning into high frequency becomes easily to occur.Then, in the kidney-shaped aperture
112 to discharge aperture 114 shift at the time of, direction that plunger 105 is compressed since lower dead center to the volume to thorax room 109
Mobile, the pressure in thorax room 109 sharp rises, and exists and the danger that oil is hit occurs.Made an uproar because the mutation of such pressure turns into
The reason for sound occurs, so, in order to prevent this problem, as shown in Fig. 5 (b), at least discharge hole of valve plate 108
The end of mouth 114 sets the escape groove 115 of the palpus shape extended to suction port 113 (referring for example to patent document 1.).
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2002-31039 publications
The content of the invention
Invent problem to be solved
However, in 2 inclined disc type capacity variable plunger pumps, a certain thorax plunger in lower dead center, its kidney-shaped aperture
(Japanese：キ ド ニ ー ポ ー ト) between the suction port of valve plate and discharge aperture when, when passing through solenoid directional control valve
Switching make swash plate from small angle of inclination from Fig. 4 (a) big angle of inclination to Fig. 4 (b) transfer when, the thorax room is by flow disk seal
Directly plunger is pushed into compression direction in the state of closing, the pressure in thorax room rapidly rises, and abnormal pressure occurs, existing causes
The worry of cylinder body damage.
Therefore, it is necessary to take the means of the generation for avoiding the abnormal pressure in such thorax room.Such as it is contemplated that with
Lower method, this method as shown in Figure 6, the escape groove 115 of the palpus shape in the discharge aperture 114 by extending valve plate, make
The kidney-shaped aperture 112 that must be covered between suction port 113 and discharge aperture 114, prevents thorax room to be fully closed,
Abnormal pressure is suppressed.However, in this occasion, deteriorate volumetric efficiency, sacrifice the energy saving as pump.
As other methods, although it is also contemplated that cylinder body itself is not avoided that using the material of high mechanical strength
Cost uprises.In addition, in the diameter for the operation plunger for reducing the effect for the part for receiving pump discharge pressure through solenoid directional control valve
To make in the method for compression area reduction, cause the deterioration for keeping the minimum control pressure at the small angle of inclination of swash plate.Although
It is also conceivable to suppressed using pressure-reducing valve to the pressure for operating plunger compartment, but in addition to cost uprises, also exist because
The response of pressure-reducing valve and the problem of the surge pressure of moment occurs.Thus, the reduction of the efficiency of pump, cost will not be caused to become highland
Avoid the effective means of the abnormal pressure in thorax room there is presently no.
It is an object of the present invention in view of the above problems, there is provided a kind of rotating speed control Variable plunger pump, rotating speed control
With Variable plunger pump the reduction of the efficiency of pump, cost will not be caused to uprise, can be avoided well from swash plate with the composition of simplicity
Big angle of inclination cylinder body between the discharge aperture of valve plate and suction port is closed in when switching to small angle of inclination
Abnormal pressure is produced in thorax room.
For solving the technological means of problem
In order to achieve the above object, the rotating speed control Variable plunger pump of the invention of technical scheme 1 is recorded in by same
As single unit construction assembling rotary shaft, cylinder body, multiple thoraxes, plunger and swash plate in the pump chamber that the inner space of the pump housing is formed；
The rotary shaft carries out rotation driving by motor；The cylinder body integratedly rotates with the rotary shaft；The plurality of thorax is in the inside of the cylinder body
It is formed parallel to above-mentioned rotary shaft；The plunger is housed in each thorax；Each end crawler shoe that the swash plate has each plunger slides
The inclined plane of contact, is tiltably supported on rotary shaft；Along with the rotation of above-mentioned rotary shaft and cylinder body, each plunger with it is above-mentioned
Stroke back and forth movement in thorax corresponding to the angle of inclination of swash plate, thus, the suction oil circuit from the inside for being formed at the above-mentioned pump housing
The suction port of valve plate of the working oil through above-mentioned cylinder body sliding contact is drawn into the thorax room formed by thorax and plunger, and
Discharge aperture of the working oil through above-mentioned valve plate is spued to the discharge oil circuit for the inside for being formed at the above-mentioned pump housing, in the rotating speed control
In system Variable plunger pump,
For avoiding the hydraulic circuit of abnormal pressure from being arranged on said units construction in a manner of built-in in the same pump housing
In, when the pressure in the thorax room between the suction port of above-mentioned valve plate and discharge aperture exceedes pre-determined pressure
When, this is used to be avoided the hydraulic circuit of abnormal pressure the working oil in the thorax room is escaped into outside thorax room.
The rotating speed control Variable plunger pump for being recorded in the invention of technical scheme 2 is being recorded in the rotating speed control of technical scheme 1
In system Variable plunger pump, above-mentioned abnormal pressure avoids mechanism from having the thorax between above-mentioned suction port and discharge aperture
Indoor working oil is discharged to the safety valve in said pump room.
The rotating speed control Variable plunger pump for being recorded in the invention of technical scheme 3 is being recorded in the rotating speed control of technical scheme 1
In system Variable plunger pump, above-mentioned abnormal pressure avoids mechanism from having pressure release oil circuit, and the pressure release oil circuit is located at through check valve connection
Thorax room and above-mentioned discharge oil circuit between above-mentioned suction port and discharge aperture.
The effect of invention
In the rotating speed control Variable plunger pump according to the present invention, using the hydraulic circuit for avoiding abnormal pressure,
When the pressure in the thorax room between the suction port of valve plate and discharge aperture exceedes pre-determined pressure, this can be made
Working oil in thorax room is escaped into outside thorax room, so, have the following effects that, i.e. when as above-mentioned thorax room in suction port with telling
When going out between aperture the state being closed in lower dead center, even if swash plate is inclined from the big angle of inclination of Large Copacity to the small of low capacity
Rake angle switches, and plunger sharp compresses the thorax room, due to the working oil escape in thorax room, abnormal pressure occur to prevent
Only, so, independent of the intensity enhancing for causing cost to uprise, pump performance can be maintained to avoid the danger of the damage of cylinder body like this.
In addition, this is used to be avoided the hydraulic circuit of abnormal pressure from being provided integrally in the same pump housing, can be by being built in the same of plunger pump
The easy composition of state in the construction of Unit one plays a role.
Brief description of the drawings
Fig. 1 is the schematic configuration diagram of the rotating speed control Variable plunger pump of the 1st embodiment of the present invention, and (a) is overall vertical
Sectional view, (b) are partial longitudinal sectional views.
Fig. 2 is the overall vertical profile of the schematic configuration for the rotating speed control Variable plunger pump for representing the 2nd embodiment of the present invention
View.
Fig. 3 is the hydraulic circuit diagram of rotating speed 2 capacity variable plunger pumps of control.
Fig. 4 is the overall longitudinal section for the schematic configuration for representing former rotating speed control Variable plunger pump, and (a) is swash plate
Big angle of inclination (spue greatly capacity) state, (b) is small angle of inclination (small discharge capacity) state of swash plate.
Fig. 5 is to represent valve plate entire surface, (b) with the approximate vertical view of the state representation valve plate overlapping with cylinder body, (a)
It is the enlarged drawing of the part by square enclosure of (a).
Fig. 6 is the magnified partial view for representing to extend the occasion of the escape groove in the discharge aperture of valve plate.
Embodiment
In the rotating speed control Variable plunger pump of the present invention, make in the pump chamber that the inner space by the same pump housing is formed
Assembling rotary shaft, cylinder body, multiple thoraxes, plunger and swash plate are constructed for single unit；The cylinder body integratedly rotates with the rotary shaft；Should
Multiple thoraxes are formed parallel in the inside of the cylinder body and above-mentioned rotary shaft；The plunger is housed in each thorax；The swash plate has each
The inclined plane of each end crawler shoe sliding contact of plunger, is tiltably supported on rotary shaft；With the rotation of cylinder body, each plunger with
Stroke back and forth movement in thorax corresponding with the angle of inclination of above-mentioned swash plate, the suction oil circuit from the inside for being formed at the above-mentioned pump housing
Working oil is drawn into the thorax room formed by thorax and plunger by the suction port of the valve plate through above-mentioned cylinder body sliding contact, and
Discharge oil circuit discharge working oil of the discharge aperture through above-mentioned valve plate to the inside for being formed at the above-mentioned pump housing；For avoiding exception
The hydraulic circuit of pressure is arranged in said units construction in the same pump housing in a manner of built-in, when the suction positioned at valve plate
When the pressure in thorax room between aperture and discharge aperture exceedes pre-determined pressure, this is used for the hydraulic pressure for being avoided abnormal pressure
Working oil in the Shi Gaitang rooms of loop is escaped into outside thorax room.
Therefore, when the state being closed as the thorax room between suction port and discharge aperture in lower dead center, i.e.,
Make small angle of inclination switching of the swash plate from the big angle of inclination of Large Copacity to low capacity, plunger sharp compresses the thorax room, also by
Utilized in the working oil in thorax room for avoiding the hydraulic circuit of abnormal pressure from escaping, abnormal pressure is able to prevent, institute
Independent of the intensity enhancing for causing cost to uprise, pump performance can be maintained to avoid the danger of the damage of cylinder body like this.And
And it is of the invention be used to avoid the hydraulic circuit of abnormal pressure from being provided integrally in the same pump housing, by being built in plunger pump
The easy composition of state in same unit construction plays a role.
As the hydraulic circuit for avoiding abnormal pressure, first, the liquid for being used to avoid abnormal pressure of safety valve is utilized
Push back road simplicity.Specifically, if setting what is connected in the thorax room made between suction port and discharge aperture with pump chamber
Drain passageway, make the downstream for suffering the close configuration safety valve i.e. composition of overflow valve in the thorax room, then can by the safety valve
The working oil in thorax room is discharged in the drain passageway at the time of more than defined pressure before as abnormal pressure, such as
Fruit pressure declines, then safety valve is closed, and the drain passageway is cut off immediately.
In addition, original plunger pump cell mesh is the such can of former construction, only it is by safety valve and above-mentioned row
Go out path to be built in the same pump housing i.e. configurable for the hydraulic circuit for avoiding abnormal pressure.The usual pump housing is integrally provided appearance
The pump housing main body of device shape and the pump cover closed, pump chamber are closed, and discharge oil circuit and suction oil circuit are internally formed in the pump cover.
Moreover, valve plate is fixed on the inner face of pump cover in a manner of the end face sliding contact of cylinder body.Therefore, the shape inside the pump cover is made
It is most easy into the composition of above-mentioned safety valve and drain passageway.Now, the drain passageway end side insertion valve plate with it is corresponding
Thorax room connects.
In addition, the hydraulic circuit for being used to avoid abnormal pressure as simplicity, can include and be used to keep away using check valve
Exempt from the hydraulic circuit of abnormal pressure.Specifically, if formed the thorax room between suction port and discharge aperture and upper
State the pressure release oil circuit of discharge oil communication, make the composition of the downstream for suffering the close configuration check valve in thorax room, then can be super
The working oil in thorax room is set to be escaped into from check valve through pressure release oil circuit at the time of the defined pressure crossed before turning into abnormal pressure
In discharge oil circuit, if pressure declines, pressure release oil circuit is immediately by the closed check valve.In this occasion, if it is basic form with
Plunger pump unit in the past is identical, then is also internally formed above-mentioned check valve and pressure release oil circuit in pump cover, makes the end of pressure release oil circuit
Portion side insertion valve plate, the composition connected with corresponding thorax room are most easy.
As more than, no matter it is above-mentioned which be used to avoid the hydraulic circuit of abnormal pressure, despite built-in
Easy composition in the pump housing, but deterioration of all no volumetric efficiency etc. has an impact to substantial pump performance, can avoid
The generation of the abnormal pressure for the reason for being likely to become cylinder body breakage.
Embodiment 1
As the 1st embodiment of the present invention, the liquid for being used to avoid abnormal pressure for possessing using safety valve is represented in Fig. 1
Push back the rotating speed 2 capacity variable plunger pumps of control on road.Fig. 1 (a) is overall longitudinal section, and (b) is to represent to be used to avoid exception
The phantom of the hydraulic circuit of pressure.
The rotating speed control of the present embodiment is with beyond the hydraulic circuit for avoiding abnormal pressure of 2 capacity variable plunger pumps 1
Plunger pump unit basic composition it is identical with the example shown in Fig. 3 and Fig. 4.
That is, in the pump chamber 11 that container-like pump housing main body 10 is closed and formed by pump cover 20, constructed as single unit
Assembling is carried out the rotary shaft 2 of rotation driving, the cylinder body 3 integratedly rotated with the rotary shaft 2 by motor, in the inside of the cylinder body 3
Multiple thoraxes 4 for being formed parallel to rotary shaft 2, the plunger 5 being housed in each thorax 4 and each end crawler shoe 6 with each plunger 5 are slided
Move the inclined plane of contact and be tiltably supported on the swash plate 7 of rotary shaft 2, also, swash plate 7 is from spring mechanism 16 to as most
The maximum tilt angle loading of big discharge capacity, and can revolt from the loading that the spring mechanism 16 is carried out and enter to swash plate 7
The direction that row pushes movably sets operation plunger 17.
The operation plunger 17 turns into the setting of the effect for the part that can receive pump oneself discharge pressure through solenoid directional control valve.
In the state of solenoid directional control valve is powered, a part for said pump oneself discharge pressure is cut off relative to the effect of operation plunger 17,
Swash plate 7 is loaded from spring mechanism 16 to maximum tilt angle, when solenoid directional control valve is switched to power-off, tells said pump oneself
The part for going out pressure acts on operation plunger 17, moves the operation plunger 17, swash plate 7 is pushed, to as minimum discharge-amount
Minimum cant vert.
Each plunger 5 of cylinder body 3 is existed with stroke corresponding with the angle of inclination of swash plate 7 with the rotation of rotary shaft 2 and cylinder body 3
Back and forth movement in thorax 4, from the suction of suction valve plate of the oil circuit through above-mentioned cylinder body sliding contact for the inside for being formed at the above-mentioned pump housing
Man-hole opening sucks working oil in thorax room 9, and the discharge aperture through above-mentioned valve plate is to the inside for being formed at the above-mentioned pump housing
Discharge oil circuit discharge working oil.
In the present embodiment, as the hydraulic circuit 30 for avoiding abnormal pressure, drain passageway 31 is formed at pump cover
20 inside, drain passageway 31 connect the thorax room 9 between the suction port of valve plate 8 and discharge aperture with pump chamber 11,
Safety valve 32 is configured in the drain passageway 31, thorax room 9 downstream position for suffering close.This drain passageway 31 wraps in end side
The through hole 31X that the valve plate 8 containing insertion connects with the kidney-shaped aperture 12 of corresponding thorax room 9.
Possess the composition of the above rotating speed control be powered with 2 capacity variable plunger pumps 1 in solenoid directional control valve, at swash plate 7
In driving under the big discharge capacity status at big angle of inclination, solenoid directional control valve by power-off switch when, in
The kidney-shaped aperture 12 is located in the thorax room 9 of the lower dead center between the suction port of valve plate 8 and discharge aperture, even if swash plate 7
Verted to the small oblique angular position as small discharge capacity and so that plunger 5 rises, produce compression drastically and turn into high pressure,
Also open safety valve 32 at the time of more than authorized pressure, the working oil in thorax room 9 is discharged in drain passageway 31.
By the work of such safety valve 32, thorax room 9 occurs may be in the abnormal pressure as cylinder body 3 produces breakage
Danger be avoided by.Then, if the pressure in thorax room 9 drops to, regulation is following, and safety valve 32 is closed immediately, by as
The swash plate 7 at small angle of inclination continues the pump driving under small discharge capacity without any obstacle.
Embodiment 2
As the present invention the 2nd embodiment, possess using check valve be used for avoid abnormal pressure hydraulic circuit turn
Speed control is shown in Fig. 2 longitudinal section with 2 capacity variable plunger pumps.
The rotating speed control of the present embodiment is with beyond the hydraulic circuit for avoiding abnormal pressure of 2 capacity variable plunger pumps 1
Plunger pump unit basic composition it is identical with the composition substantially of the plunger pump unit of above-described embodiment 1 shown in Fig. 1.
The present embodiment be used for avoid the hydraulic circuit 40 of abnormal pressure from being located at valve plate 8 in being internally formed for pump cover 20
Suction port and discharge aperture between the pressure release oil circuit 41 that is connected with discharge oil circuit 21 of thorax room 9, the pressure release oil circuit 41,
The downstream position for suffering the close configuration check valve 42 of thorax room 9.This pressure release oil circuit 41 end side include insertion valve plate 8, with
The through hole 41X that the kidney-shaped aperture 12 of corresponding thorax room 9 connects.
Possess the composition of the above rotating speed control be powered with 2 capacity variable plunger pumps 1 in solenoid directional control valve, at swash plate 7
In driving under the big discharge capacity status at big angle of inclination, solenoid directional control valve by power-off switch when, in
The kidney-shaped aperture 12 is located in the thorax room 9 of the lower dead center between the suction port of valve plate 8 and discharge aperture, even if swash plate 7
Verted to the small oblique angular position as small discharge capacity and so that plunger 5 rises, produce compression drastically and turn into high pressure,
Also open check valve 42 at the time of more than authorized pressure, the working oil in thorax room 9 is discharged to discharge oil through pressure release oil circuit 41
In road 21.
By the work of such check valve 42, thorax room 9 occurs may be in the abnormal pressure as cylinder body 3 produces breakage
Danger be avoided by.Then, if the pressure in thorax room 9 drops to, regulation is following, and check valve 42 is closed immediately, by as
The swash plate 7 at small angle of inclination continues the pump driving under small discharge capacity without any obstacle.
Description of reference numerals：
1、100：Rotating speed 2 capacity variable plunger pumps of control
2、102：Rotary shaft
3、103：Cylinder body
4、104：Thorax
5、105：Plunger
6、106：Plunger end crawler shoe
7、107：Swash plate
8、108：Valve plate
9、109：Thorax room
10、110：Pump housing main body
11、111：Pump chamber
12、112：Kidney-shaped aperture
113：Suction port
114：Discharge aperture
115：Escape groove
16、116：Spring mechanism
17、117：Operate plunger
118：Solenoid directional control valve
20、120：Pump cover
21、121：Discharge oil circuit
30：For avoiding the hydraulic circuit of abnormal pressure
31：Drain passageway
31X：Valve plate through hole
32：Safety valve
40：For avoiding the hydraulic circuit of abnormal pressure
41：Pressure release oil circuit
41X：Valve plate through hole
42：Check valve
Claims (3)
1. a kind of rotating speed control Variable plunger pump, single unit is used as in the pump chamber that the inner space by the same pump housing is formed
Construction assembling rotary shaft, cylinder body, multiple thoraxes, plunger and swash plate；The rotary shaft carries out rotation driving by motor；The cylinder body and the rotation
Rotating shaft integratedly rotates；The plurality of thorax is formed parallel in the inside of the cylinder body and above-mentioned rotary shaft；The plunger is housed in respectively
In thorax；The swash plate has the inclined plane of each end crawler shoe sliding contact of each plunger, is tiltably supported on rotary shaft；Along with
The rotation of above-mentioned rotary shaft and cylinder body, each plunger with stroke back and forth movement in thorax corresponding with the angle of inclination of above-mentioned swash plate,
Thus, oil circuit is sucked by the suction of valve plate of the working oil through above-mentioned cylinder body sliding contact from the inside for being formed at the above-mentioned pump housing
Aperture is drawn into the thorax room formed by thorax and plunger, and by discharge aperture of the working oil through above-mentioned valve plate on being formed at
The discharge oil circuit for stating the inside of the pump housing is spued, and the rotating speed control Variable plunger pump is characterised by：
For avoiding the hydraulic circuit of abnormal pressure from being arranged in the same pump housing in said units construction in a manner of built-in, when
When the pressure in thorax room between the suction port of above-mentioned valve plate and discharge aperture exceedes pre-determined pressure, the use
The working oil in the thorax room is set to escape into outside thorax room in avoiding the hydraulic circuit of abnormal pressure.
2. rotating speed control Variable plunger pump according to claim 1, it is characterised in that above-mentioned to be used to avoid abnormal pressure
Hydraulic circuit have the working oil in the thorax room between above-mentioned suction port and discharge aperture be discharged to above-mentioned pump chamber
Interior safety valve.
3. rotating speed control Variable plunger pump according to claim 1, it is characterised in that above-mentioned to be used to avoid abnormal pressure
Hydraulic circuit there is pressure release oil circuit, the pressure release oil circuit through check valve connect between above-mentioned suction port and discharge aperture
Thorax room and above-mentioned discharge oil circuit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015082392A JP6280517B2 (en) | 2015-04-14 | 2015-04-14 | Variable piston pump for speed control |
| JP2015-082392 | 2015-04-14 | ||
| PCT/JP2016/058125 WO2016167070A1 (en) | 2015-04-14 | 2016-03-15 | Rotational-speed-controlling variable piston pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107407263A true CN107407263A (en) | 2017-11-28 |
| CN107407263B CN107407263B (en) | 2019-07-02 |
Family
ID=57126127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680017051.2A Active CN107407263B (en) | 2015-04-14 | 2016-03-15 | Variable plunger pump is used in revolving speed control |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6280517B2 (en) |
| CN (1) | CN107407263B (en) |
| WO (1) | WO2016167070A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115711210A (en) * | 2022-12-02 | 2023-02-24 | 青岛力克川液压机械有限公司 | Variable mechanism and plunger pump and plunger motor adopting same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050029A (en) * | 2017-12-05 | 2018-05-18 | 宁波市奉化溪口威尔特制泵厂 | A kind of energy-efficient inclined disc type high-pressure plunger pump |
| CN110887974A (en) * | 2019-12-24 | 2020-03-17 | 中国商用飞机有限责任公司 | Method and device for measuring rotating speed of plunger pump |
| CN115013275B (en) * | 2022-05-31 | 2024-03-08 | 江苏大学流体机械温岭研究院 | Load-sensitive digital axial plunger pump with active valve flow distribution and working method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5642441Y2 (en) * | 1975-09-04 | 1981-10-05 | ||
| JPH08312524A (en) * | 1995-05-19 | 1996-11-26 | Hitachi Constr Mach Co Ltd | Hydraulic piston pump |
| JPH10252642A (en) * | 1997-03-11 | 1998-09-22 | Hitachi Constr Mach Co Ltd | Axial piston type hydraulic pump |
| CN200996367Y (en) * | 2007-01-22 | 2007-12-26 | 油研工业株式会社 | Capacity-variable pump |
| CN101949373A (en) * | 2009-07-10 | 2011-01-19 | 株式会社神崎高级工机制作所 | Sealing loop forming pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745402Y2 (en) * | 1979-04-19 | 1982-10-06 | ||
| JPH08210242A (en) * | 1995-02-01 | 1996-08-20 | Hitachi Constr Mach Co Ltd | Axial piston pump motor |
| JP6281931B2 (en) * | 2013-09-09 | 2018-02-21 | 株式会社 神崎高級工機製作所 | Axial piston device |
-
2015
- 2015-04-14 JP JP2015082392A patent/JP6280517B2/en active Active
-
2016
- 2016-03-15 WO PCT/JP2016/058125 patent/WO2016167070A1/en active Application Filing
- 2016-03-15 CN CN201680017051.2A patent/CN107407263B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5642441Y2 (en) * | 1975-09-04 | 1981-10-05 | ||
| JPH08312524A (en) * | 1995-05-19 | 1996-11-26 | Hitachi Constr Mach Co Ltd | Hydraulic piston pump |
| JPH10252642A (en) * | 1997-03-11 | 1998-09-22 | Hitachi Constr Mach Co Ltd | Axial piston type hydraulic pump |
| CN200996367Y (en) * | 2007-01-22 | 2007-12-26 | 油研工业株式会社 | Capacity-variable pump |
| CN101949373A (en) * | 2009-07-10 | 2011-01-19 | 株式会社神崎高级工机制作所 | Sealing loop forming pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115711210A (en) * | 2022-12-02 | 2023-02-24 | 青岛力克川液压机械有限公司 | Variable mechanism and plunger pump and plunger motor adopting same |
| CN115711210B (en) * | 2022-12-02 | 2023-10-13 | 青岛力克川液压机械有限公司 | Variable mechanism and plunger pump and plunger motor using variable mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016200115A (en) | 2016-12-01 |
| WO2016167070A1 (en) | 2016-10-20 |
| JP6280517B2 (en) | 2018-02-14 |
| CN107407263B (en) | 2019-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107407263A (en) | Rotating speed control Variable plunger pump | |
| CN1761817A (en) | Rotary closed type compressor and refrigerating cycle apparatus | |
| US9051935B2 (en) | Single screw compressor | |
| CN101054977A (en) | Variable capacity rotary compressor and method of varying capacity thereof | |
| CN101421516A (en) | Compressor | |
| CN105065272A (en) | Rotary compressor | |
| TW200615457A (en) | Compressor | |
| CN107061279B (en) | Cylinder assembly and compressor, air conditioner with it | |
| JP6109301B2 (en) | Multi-cylinder rotary compressor and vapor compression refrigeration cycle apparatus equipped with the multi-cylinder rotary compressor | |
| WO2005108794A1 (en) | Rotary fluid machine | |
| CN1793660A (en) | Rotary compressor of multi-cylinder | |
| CN105909498B (en) | Two level stroke type rotary compressor | |
| WO2021229797A1 (en) | Screw compressor | |
| CN205503461U (en) | Compressor | |
| CN204371654U (en) | Electromagnetic switch oblique plate plunger pump | |
| CN104912795B (en) | Varying capacity screw compressor | |
| CN202100467U (en) | Valve component and compressor with same | |
| KR101451472B1 (en) | Variable displacement swash plate type compressor | |
| CN204941943U (en) | Rotary compressor | |
| US20180180041A1 (en) | Reciprocating Compressor Provided with Arrangement of Suction Valves | |
| KR20120133034A (en) | valve unit of compressor | |
| CN108050065B (en) | Compressor and air conditioner with same | |
| CN106438363B (en) | A kind of pump assembly of rolling rotor compressor | |
| CN102933850A (en) | Valve arrangement for a scroll refrigeration compressor | |
| KR102130408B1 (en) | Variable displacement swash plate type compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |