CN112727855A - Oil absorption assembly, hydraulic oil circuit system and engineering machinery - Google Patents
Oil absorption assembly, hydraulic oil circuit system and engineering machinery Download PDFInfo
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- CN112727855A CN112727855A CN202110012388.7A CN202110012388A CN112727855A CN 112727855 A CN112727855 A CN 112727855A CN 202110012388 A CN202110012388 A CN 202110012388A CN 112727855 A CN112727855 A CN 112727855A
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- 239000003921 oil Substances 0.000 title claims abstract description 267
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 61
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 27
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000001556 precipitation Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
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- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to the technical field of oil inlet of hydraulic pumps and discloses an oil absorption assembly and a hydraulic oil circuit system. The oil absorption assembly comprises a pipe body, a hydraulic oil tank connecting part, a hydraulic pump connecting part and a jet device, wherein an oil inlet channel is arranged in the pipe body, and the hydraulic oil tank connecting part is used for connecting a hydraulic oil tank; the hydraulic pump connecting part is used for connecting a hydraulic pump, the hydraulic oil tank connecting part is communicated with the inlet of the oil inlet channel, and the hydraulic pump connecting part is communicated with the outlet of the oil inlet channel; the fluidic device includes efflux entry and the efflux export of intercommunication, and the fluidic device sets up on the body and the efflux export is located oil feed passageway. In actual use, can promote the suction capacity of follow hydraulic tank suction fluid, increase the oil absorption capacity of hydraulic pump and the pressure of hydraulic pump sunction inlet, avoid causing the precipitation of hydraulic pump sunction inlet bubble because the low pressure, reduce the empty influence of inhaling of hydraulic pump to improve the volumetric efficiency and the life of hydraulic pump.
Description
Technical Field
The invention relates to the technical field of oil inlet of hydraulic pumps, in particular to an oil suction assembly, a hydraulic oil circuit system and engineering machinery.
Background
At present, the hydraulic oil tank is of an open structure, namely, the hydraulic oil tank is communicated with the atmosphere through an oil tank vent valve directly, the pressure in the oil tank is low, when the liquid level of the oil tank is too low, an oil suction pipe connected with a hydraulic pump can suck air directly, or when the oil suction pipe of the hydraulic pump is unreasonable in design, the oil suction resistance is large, the local pressure of the oil suction pipe is reduced, even the pressure is lower than the atmospheric pressure, negative pressure is generated, and gas dissolved in oil can be separated to form bubbles. Both phenomena will cause a suction phenomenon of the hydraulic pump. The bubbles mixed in the oil are brought to a high-pressure area from the inlet of the hydraulic pump along with the oil, the volume of the bubbles can be rapidly reduced until the bubbles break due to high-pressure compression, the position occupied by the bubbles can be vacuumized, the high-pressure oil around the bubbles can be rapidly filled, the process is short, severe impact can occur in the oil, the oil temperature and the pressure at the position where the bubbles break can be rapidly increased, vibration noise is caused, if the position where the bubbles break is close to a solid wall surface, the metal surface can be damaged or even fall off due to the effects of long-term high temperature bearing, high pressure bearing, repeated severe impact, oxidation corrosion and the like, namely, the cavitation phenomenon is caused, and the direct damage or the performance reduction of the hydraulic pump.
In addition, the oil suction of the hydraulic pump is reduced due to the suction phenomenon, which may reduce the volumetric efficiency of the hydraulic pump, and may cause flow and pressure pulsation of the system, thereby deteriorating the stability of the system. In addition, due to the compressibility of the air bubbles, the elastic modulus of the oil liquid can be reduced, so that the execution mechanism is slow, false operations such as crawling and the like occur, and the normal work of the system is seriously influenced.
Disclosure of Invention
The invention aims to provide an oil absorption assembly, which can improve the oil suction capacity of a hydraulic oil tank in practical use, increase the oil absorption capacity of a hydraulic pump and the pressure of a suction inlet of the hydraulic pump, avoid the separation of bubbles at the suction inlet of the hydraulic pump caused by low pressure, reduce the suction effect of the hydraulic pump, and further improve the volumetric efficiency and the service life of the hydraulic pump.
In order to achieve the purpose, the invention provides an oil absorption assembly, which comprises a pipe body, a hydraulic oil tank connecting part, a hydraulic pump connecting part and a jet device, wherein an oil inlet channel is formed in the pipe body, and the hydraulic oil tank connecting part is used for connecting a hydraulic oil tank; the hydraulic pump connecting part is used for connecting a hydraulic pump, the hydraulic oil tank connecting part is communicated with an inlet of the oil inlet channel, and the hydraulic pump connecting part is communicated with an outlet of the oil inlet channel; the jet device comprises a jet flow channel with a jet inlet and a jet outlet, the jet device is arranged on the pipe body, and the jet outlet is located in the oil inlet channel.
In the technical scheme, the jet device comprises a jet inlet and a jet outlet which are communicated, the jet device is arranged on the pipe body, and the jet outlet is positioned in the oil inlet channel, so that in practical use, the oil suction assembly connects the hydraulic oil tank connecting part with the hydraulic oil tank, connects the hydraulic pump connecting part with the hydraulic pump, the hydraulic pump starts to suck oil from the hydraulic oil tank through the oil inlet channel, high-pressure oil can enter the jet device from the jet inlet and enter the oil inlet channel through the jet outlet, so that negative pressure or vacuum is generated in the oil inlet channel through entrainment diffusion to generate pressure lower than the pressure at the connecting part of the hydraulic oil tank, low-pressure oil in the hydraulic oil tank can be sucked into the oil inlet channel to flow forwards by utilizing the pressure difference, and partial energy of the high-pressure oil can be transferred to the low-pressure oil sucked into the oil inlet channel, make high pressure fluid and low pressure fluid fully mix and flow forward fast in the oil feed passageway, this not only has increased the oil absorption ability of hydraulic pump through the mixed fluid that flows at a high speed, simultaneously through the mixture of high pressure fluid and low pressure fluid, has improved the pressure of hydraulic pump entry, avoids causing the precipitation of hydraulic pump sunction inlet bubble owing to the low pressure, has solved the sky problem of inhaling of hydraulic pump, has improved the volumetric efficiency and the life of hydraulic pump.
Further, the oil inlet passage comprises an inner diameter tapered section, a first equal diameter section and an inner diameter tapered section which are sequentially arranged in the oil inlet direction, wherein the jet flow outlet is positioned on the inlet side of the inner diameter tapered section.
Still further, the hydraulic-tank connecting portion is connected to and extends radially outward from an inlet side of the inner diameter-tapered section.
Further, the inner peripheral surface of the hydraulic oil tank connecting portion and the inner peripheral surface of the inner diameter tapered section are connected by an arc-shaped surface having a convex surface facing the inside of the oil inlet passage.
Further, the oil inlet passage includes a second equal-diameter section connected to a large-mouth end of the inner-diameter gradually-expanding section.
In addition, the body is the stereoplasm body, the oil absorption subassembly still includes the hose, wherein, follows the oil feed direction of oil feed passageway, the end of body passes through the hose with hydraulic pump connecting portion connects.
Further, the hydraulic pump connection part is disposed at a corner with respect to the end of the pipe body, and the hose is located at the corner to serve as an elbow hose.
In addition, the oil absorption assembly comprises an auxiliary high-pressure oil pipe, one end of the auxiliary high-pressure oil pipe is connected with the jet inlet, the other end of the auxiliary high-pressure oil pipe is used for being connected with a high-pressure oil port of the hydraulic pump, and a switch current-limiting unit is arranged on the auxiliary high-pressure oil pipe.
Furthermore, the number of the jet inlets is two, the number of the auxiliary high-pressure oil pipes is two, one of the auxiliary high-pressure oil pipes is used as a rear pump auxiliary high-pressure oil pipe, one end of the rear pump auxiliary high-pressure oil pipe is connected with one jet inlet, the other end of the rear pump auxiliary high-pressure oil pipe is used for being connected with a rear pump of a hydraulic pump, and the rear pump auxiliary high-pressure oil pipe is provided with the switch current limiting unit; the other auxiliary high-pressure oil pipe is used as a front pump auxiliary high-pressure oil pipe, one end of the front pump auxiliary high-pressure oil pipe is connected with the other jet inlet, the other end of the front pump auxiliary high-pressure oil pipe is used for being connected with a front pump of the hydraulic pump, and the front pump auxiliary high-pressure oil pipe is provided with the switch current-limiting unit.
In addition, the jet flow channel comprises an annular oil equalizing cavity, and the jet flow inlet and the jet flow outlet are communicated with the annular oil equalizing cavity.
Further, one of the jet outlets is arranged on a central axis of the jet device as a central jet outlet; and/or the jet flow outlets are uniformly distributed at intervals in the circumferential direction around the central axis of the jet flow device.
Further, the jet device comprises a shell with the jet inlet and a nozzle with the jet outlet, wherein the shell is arranged on the pipe body, the nozzle is arranged in the shell, an annular oil equalizing cavity is formed between the nozzle and the shell, and the jet inlet and the jet outlet are communicated with the annular oil equalizing cavity.
Furthermore, the nozzle comprises a nozzle base body, an annular groove is formed on the outer peripheral surface of the nozzle base body, and the annular oil equalizing cavity is sealed and enclosed by the shell and the annular groove.
Furthermore, an assembling section is formed on the outer peripheral surface of the nozzle base body, the outer diameter of the assembling section is smaller than the inner groove wall of the annular groove and is connected with the inner groove wall, the assembling section is assembled in the assembling hole of the shell, and the inner groove wall axially stops on the orifice edge wall of the assembling hole.
Further, a jet flow channel is formed in the nozzle base body, the jet flow channel comprises the jet flow channel, the annular groove is arranged around the jet flow channel, and a plurality of through holes for communicating the annular oil equalizing cavity with the jet flow channel are formed in the bottom wall of the annular groove; the nozzle includes a nozzle needle having the jet outlet, a portion of the nozzle needle fitting within the jet passage.
Further, the nozzle comprises a plurality of nozzle needle tubes with the jet flow outlets, wherein the nozzle needle tubes are arranged on the nozzle seat body and are circumferentially and uniformly distributed around the central axis of the nozzle seat body at intervals, and the nozzle needle tubes are communicated with the annular oil distribution cavity.
In addition, the invention provides a hydraulic oil circuit system, which comprises a hydraulic oil tank, a hydraulic pump and the oil suction assembly, wherein the hydraulic oil tank connecting part is connected with the hydraulic oil tank, and the hydraulic pump connecting part is connected with the hydraulic pump.
Furthermore, the invention provides a construction machine comprising the above-described hydraulic oil circuit system.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a perspective view of an oil absorption assembly according to an embodiment of the present invention;
FIG. 2 is a cross-sectional structural schematic of one location of the oil absorption assembly of FIG. 1;
FIG. 3 is a perspective view of one configuration of a nozzle in the oil absorption assembly of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the nozzle of FIG. 3 in one location;
FIG. 5 is a perspective view of an alternative construction of the nozzle in the oil absorption assembly of FIG. 2;
FIG. 6 is a schematic cross-sectional view of the nozzle of FIG. 5 in one position;
FIG. 7 is a schematic structural diagram of a hydraulic oil circuit system according to an embodiment of the present invention, wherein the connection between the oil suction assembly of FIG. 1 and the hydraulic oil tank and the connection between the oil suction assembly and the hydraulic pump are shown;
fig. 8 is a schematic oil flow direction diagram of a hydraulic oil circuit system according to an embodiment of the present invention.
Description of the reference numerals
1-pipe body, 2-oil inlet channel, 3-hydraulic oil tank, 4-hydraulic oil tank connecting part, 5-hydraulic pump, 6-hydraulic pump connecting part, 7-fluidic device, 8-fluidic inlet, 9-fluidic outlet, 10-inner diameter reducing section, 11-first equal diameter section, 12-second equal diameter section, 13-inner diameter gradually expanding section, 14-hose, 15-switch flow limiting unit, 16-rear pump auxiliary high pressure oil pipe, 17-front pump auxiliary high pressure oil pipe, 18-annular oil equalizing cavity, 19-shell, 20-nozzle, 21-nozzle base body, 22-annular groove, 23-assembling section, 24-inner side groove wall, 25-fluidic channel, 27-through hole, 28-nozzle needle pipe and 29-oil absorbing component, 30-gear pump oil suction pipe.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, 2 and 8, the present invention provides an oil suction assembly 29 including a pipe body 1, a hydraulic tank connecting portion 4, a hydraulic pump connecting portion 6 and a jet device 7, wherein the pipe body 1 has an oil inlet passage 2 therein, the hydraulic tank connecting portion 4 is used for connecting a hydraulic tank 3, the hydraulic pump connecting portion 6 is used for connecting a hydraulic pump 5, wherein the hydraulic tank connecting portion 4 is communicated with an inlet of the oil inlet passage 2, the hydraulic pump connecting portion 6 is communicated with an outlet of the oil inlet passage 2, and the jet device 7 includes a jet flow passage having a jet inlet 8 and a jet outlet 9, the jet device 7 is disposed on the pipe body 1 and the jet outlet 9 is located in the oil inlet passage 2, so that high-pressure oil can enter the jet device 7 from the jet inlet 8 and can be jetted into the oil inlet passage 2 from the jet.
Because the fluidic device comprises the fluidic inlet and the fluidic outlet which are communicated, the fluidic device is arranged on the pipe body, and the fluidic outlet is positioned in the oil inlet channel, in the practical use of the oil suction assembly, the connecting part of the hydraulic oil tank is connected with the hydraulic oil tank, the connecting part of the hydraulic pump is connected with the hydraulic pump, the hydraulic pump is started to suck oil from the hydraulic oil tank through the oil inlet channel, high-pressure oil can enter the fluidic device from the fluidic inlet and enter the oil inlet channel through the fluidic outlet, so that negative pressure or vacuum is generated in the oil inlet channel through entrainment diffusion action to generate pressure lower than the pressure at the connecting part of the hydraulic oil tank, low-pressure oil in the hydraulic oil tank can be sucked into the oil inlet channel to flow forwards by utilizing the pressure difference, partial energy of the high-pressure oil can be transferred to the low-pressure oil sucked into the oil inlet channel, so that the high-pressure oil and the low-pressure oil, this has not only increased the oil absorption ability of hydraulic pump through the mixed fluid of high-speed flow, simultaneously through the mixture of high-pressure fluid and low pressure fluid, has improved the pressure of hydraulic pump entry, avoids causing the precipitation of hydraulic pump sunction inlet bubble because the low pressure, has solved the empty problem of inhaling of hydraulic pump, has improved the volumetric efficiency and the life of hydraulic pump.
In this oil absorption subassembly, hydraulic tank connecting portion 4 can be connected through the inlet of connecting pipe and oil feed passageway 2, perhaps, hydraulic tank connecting portion can set up on body 1 in order to be connected with the inlet of oil feed passageway 2.
In addition, in the oil suction assembly, the oil inlet passage 2 may have various structural shapes, for example, the oil inlet passage 2 may be a straight extended equal diameter pipe section. Alternatively, referring to fig. 2, in an embodiment, the oil inlet passage 2 includes an inner diameter tapered section 10, a first equal diameter section 11 and an inner diameter tapered section 13 arranged in sequence in the oil inlet direction, wherein the jet outlet 9 is located at the inlet side of the inner diameter tapered section 10, so that the jet outlet 9 can inject high-pressure oil into the inner diameter tapered section 10, a negative pressure or vacuum is generated in the inner diameter tapered section 10 through entrainment diffusion, the pressure in the inner diameter tapered section 10 is lower than that in the oil inlet passage part upstream of the inner diameter tapered section 10, the low-pressure oil in the hydraulic oil tank is pressed into the oil inlet passage 2 by using a pressure difference, then the low-pressure oil and the high-pressure oil flow forward in the first equal diameter section 10, and energy and momentum exchange is performed in the first equal diameter section 10, that is, part of energy of the high-pressure oil can be transferred to the low-pressure oil pumped into the oil inlet passage, and after being fully mixed, the oil is output through the inner diameter gradually-expanding section 13, so that oil which flows rapidly and has large cross section flow is formed, the pressure at the inlet of the hydraulic pump can be further improved, and the air suction problem of the hydraulic pump is further solved.
For the jet outlet 9 located at the inlet side of the inner diameter tapered section 10, the jet outlet 9 may partially protrude into the inner diameter tapered section 10, or the jet outlet 9 may not protrude into the inner diameter tapered section 10 and maintain a predetermined axial distance from the inlet side of the inner diameter tapered section 10.
In addition, in one embodiment, the connection position of the hydraulic tank connection portion 4 and the pipe body 1 may be maintained at a predetermined axial distance from the inlet side of the inner diameter-tapered section 10 in the axial direction of the pipe body 1. Alternatively, in another embodiment, in order to be able to further enhance the oil suction capacity from the hydraulic oil tank, referring to fig. 2, the hydraulic oil tank connection portion 4 is connected to the inlet side of the inner diameter-tapered section 10 and extends radially outward from the inlet side of the inner diameter-tapered section 10. Like this, refer to fig. 7, when the radial space convenient to utilize body 1 makes hydraulic tank connecting portion 4 and hydraulic tank 3 connect, because the distance between hydraulic tank connecting portion 4 and the internal diameter convergent section 10 is showing to shorten, like this, when producing negative pressure or vacuum in the internal diameter convergent section 10, low pressure fluid in the hydraulic tank 3 can be easily and fast through hydraulic tank connecting portion 4 in being inhaled internal diameter convergent section 10 to further promote oil absorption ability.
Of course, the inner peripheral surface of the hydraulic tank connecting portion 4 and the inner peripheral surface of the inner diameter-tapered section 10 may be connected by a right angle. Or, alternatively, the inner peripheral surface of the hydraulic oil tank connecting part 4 and the inner peripheral surface of the inner diameter tapered section 10 are connected by an arc surface facing the inside of the oil inlet channel 2, so that the low-pressure oil in the hydraulic oil tank can be more easily sucked into the inner diameter tapered section 10 through the corner by the arc surface.
Further, referring to fig. 1 and 2, the oil inlet passage 2 includes a second, equal-diameter section 12 connected to a large mouth end of an inner diameter-diverging section 13. Like this, the mixed fluid of following the internal diameter divergent section 13 output can make mixed fluid further flow steadily through the rectification of second constant diameter section 12, reduces mixed fluid and takes place the disturbance in the forward flow process to improve the pressure of hydraulic pump entry more steadily.
In addition, in the oil suction assembly, the pipe body 1 may be a hose or a hard pipe or a flexible pipe capable of being broken between the hose and the hard pipe. And the hydraulic pump connecting part 6 can be directly connected with the pipe body 1, for example, can be directly connected at the tail end of the pipe body 1 along the oil inlet direction. Alternatively, in an alternative embodiment, referring to fig. 1 and 2, the tube body 1 is a rigid tube body, so that the hydraulic oil tank connection portion 4 can be stably and reliably connected to the tube body 1, and the oil suction assembly further includes a hose 14, wherein, in the oil feeding direction of the oil feeding passage, the end of the tube body 1 (for example, the large-diameter end of the inner diameter gradually-expanded section 13 of the tube body or the end of the second equal-diameter section 12) is connected to the hydraulic pump connection portion 6 through the hose 14. Thus, the flexible pipe 14 can buffer the flow fluctuation of the mixed oil, so that the mixed oil can further flow smoothly, the disturbance of the forward flow process of the mixed oil is reduced, and the pressure at the inlet of the hydraulic pump is increased smoothly. In addition, the flexible characteristic of the hose 14 can further help the hydraulic pump connection part 6 and the pipe body 1 to be specifically arranged according to different occasions, namely, the pipeline installation arrangement.
Of course, the hose 14 may be a straight pipe, or, referring to fig. 1 and 2, the hydraulic pump connection portion 6 may be disposed at a corner, for example, 90 ° with respect to the end of the pipe body 1, and the hose 14 is located at the corner to serve as an elbow hose, for example, so that the elbow hose is bent to be a 90 ° elbow hose, so that the elbow hose may be bent to be a 90 ° elbow hose to achieve smooth transition, so that while ensuring installability and reducing the influence of pressure pulsation, the pressure loss and negative pressure influence caused by the 90 ° elbow of the hard pipe may be reduced, and the pressure at the inlet of the hydraulic pump may be further increased.
In addition, in order to further improve the smoothness of the forward flow of the mixed oil, in one embodiment, referring to fig. 2, the end of the pipe body 1 (the large-mouth end of the inner diameter-diverging section 13 of the pipe body or the end of the second equal diameter section 12), the hose 14 and the hydraulic pump connection 6 have the same inner diameter, so that the mixed oil can more smoothly flow forward to the inlet of the hydraulic pump to more smoothly increase the pressure of the inlet of the hydraulic pump. Of course, in alternative embodiments, the end of the pipe body 1, the hose 14 and the hydraulic pump connection 6 may have different inner diameters as long as a smooth forward flow of oil can be achieved.
Furthermore, in actual use, the jet inlet 8 may be connected to any high pressure oil source. For example, in an embodiment, referring to fig. 1, 2 and 3, the oil suction assembly includes an auxiliary high-pressure oil pipe, one end of the auxiliary high-pressure oil pipe is connected to the jet inlet 8, the other end of the auxiliary high-pressure oil pipe is used for being connected to a high-pressure oil port of the hydraulic pump 5, and the auxiliary high-pressure oil pipe is provided with a switch flow limiting unit 15. In this way, a portion of the high pressure oil output by the operation of the hydraulic pump 5 may flow through the auxiliary high pressure oil line to the jet inlet 8 and into the jet device 7.
Of course, the number of the auxiliary high-pressure oil pipes can be one, or can be multiple, and the number can be selected according to actual requirements.
For example, in an embodiment, referring to fig. 1, 2 and 3, the number of the jet inlets 8 is two, and the number of the auxiliary high-pressure oil pipes is two, wherein one auxiliary high-pressure oil pipe is used as a rear pump auxiliary high-pressure oil pipe 16, one end of the rear pump auxiliary high-pressure oil pipe 16 is connected with one jet inlet 8, and the other end is used for being connected with a rear pump of the hydraulic pump, and the rear pump auxiliary high-pressure oil pipe 16 is provided with a switch current-limiting unit 15; the other auxiliary high-pressure oil pipe is used as a front pump auxiliary high-pressure oil pipe 17, one end of the front pump auxiliary high-pressure oil pipe 17 is connected with the other jet flow inlet 8, the other end of the front pump auxiliary high-pressure oil pipe is used for being connected with a front pump of the hydraulic pump, and a switch current limiting unit 15 is arranged on the front pump auxiliary high-pressure oil pipe 17. For example, the high-pressure oil of the front and rear plunger pumps of the hydraulic pump may be injected into the fluidic device 7 from the two jet inlets 8 through the rear pump sub high-pressure oil pipe 16 and the front pump sub high-pressure oil pipe 17, respectively, to increase the supply amount of the high-pressure oil supplied into the fluidic device 7 by making full use of the structure of the hydraulic pump itself. In addition, in one embodiment, the on-off restriction unit 15 functions as a shut-off valve (or throttle or orifice) and a pressure reducing valve, when the shut-off valve is closed, no high-pressure oil enters the fluidic device 7 through the rear pump auxiliary high-pressure oil pipe 16 and/or the front pump auxiliary high-pressure oil pipe 17, and the hydraulic pump sucks oil by virtue of the low pressure generated by the hydraulic pump itself. When the stop valve is opened, part of high-pressure oil flows into the jet device through the rear pump auxiliary high-pressure oil pipe 16 and the front pump auxiliary high-pressure oil pipe 17 to generate jet flow, the auxiliary hydraulic pump sucks oil, and the opening degree of the stop valve can be adjusted. Therefore, whether the auxiliary jet function is added or not can be freely switched, and meanwhile, oil absorption is assisted by the high-pressure oil as little as possible, so that the oil absorption is convenient and fast. The pressure reducing valve is used for limiting the pressure at the front end of the jet device 7, preventing the jet device 7 from introducing too much high-pressure oil due to too high pressure, avoiding influencing or reducing the working efficiency of the hydraulic pump, and assisting in oil absorption by consuming as little high-pressure oil as possible. Of course, in practical use, the switching current limiting unit 15 may be controlled by a controller.
In addition, the switching restriction unit 15 may be an integral valve, or may include valves in series, for example, with reference to fig. 8.
Furthermore, the fluidic device 7 may have various configurations, for example, in one configuration, a straight fluidic channel may be formed in the fluidic device 7, with one end of the fluidic channel serving as a fluidic inlet and the other end serving as a fluidic outlet. Alternatively, in another embodiment, referring to fig. 2-6, the jet flow path includes an annular oil-equalizing chamber 18, that is, an annular oil-equalizing chamber 18 is formed in the jet device 7, and the jet inlets 8 and the jet outlets 9 are communicated with the annular oil-equalizing chamber 18, so that the high-pressure oil flows into the annular oil-equalizing chamber 18 from one or more of the jet inlets 8 and fills the annular oil-equalizing chamber, thereby forming a stable stored high-pressure oil, which can make the jet outlets 9 eject a stable and reliable high-pressure oil flow, thereby forming a stable and reliable continuous negative pressure or vacuum in the oil inlet passage 2, such as the inner diameter tapered section 10, and thus sucking the oil in the hydraulic oil tank from the hydraulic oil tank connection more stably and continuously.
In addition, the number of the jet outlets 9 may be one or plural, and may have various arrangements. For example, in an embodiment, referring to the embodiment shown in fig. 3 and 4, a jet outlet 9 is arranged on the central axis of the jet device 7 as a central jet outlet 9, so that central injection can be realized, and high-pressure and high-speed jet flow is generated at the center to drive the oil flow of the hydraulic oil tank connecting part 4 to move, thereby improving the filling capacity and oil supplementing efficiency of the hydraulic pump, avoiding the problem of pumping empty of the hydraulic pump, and improving the volumetric efficiency and service life of the hydraulic pump. Or, in another embodiment, referring to fig. 5 and 6, a plurality of jet outlets 9 are uniformly distributed at intervals in the circumferential direction around the central axis of the jet device 7, so that annular injection can be realized, and high-pressure and high-speed jet flow is generated to drive the oil flow beam of the hydraulic oil tank connecting part 4 to move, thereby improving the filling capacity and the oil supplementing efficiency of the hydraulic pump, avoiding the problem of pumping empty of the hydraulic pump, and improving the volumetric efficiency and the service life of the hydraulic pump. Alternatively, in another embodiment, one jet outlet 9 is arranged on the central axis of the jet device 7 to serve as the central jet outlet 9, and the plurality of jet outlets 9 are circumferentially and uniformly distributed around the central axis of the jet device 7, so that the central jet and the annular jet around the central jet can be formed, and the high-pressure oil liquid stored in the annular oil-equalizing chamber 18 can well meet the high-pressure oil liquid amount required by the central jet and the annular jet.
In the oil suction assembly, the jet device 7 can have various structural forms, but when it needs to be explained, the jet device 7 can be in any structural form as long as the annular oil equalizing chamber 18 can be formed in the jet device 7 and the annular oil equalizing chamber 18 is communicated with the jet outlet 9. For example, in one form of construction, an annular oil-distributing chamber 18 is integrally formed, e.g., injection molded, into the fluidic device 7. Alternatively, in another embodiment, the fluidic device 7 comprises a housing 19 with a fluidic inlet 8 and a nozzle 20 with a fluidic outlet 9, the housing 19 being arranged on the tubular body 1, the nozzle 20 being arranged in the housing 19, for example, the nozzle 20 being inserted axially into the housing 19, the housing 19 being connected at one end of the tubular body 1 at the port. An annular oil equalizing chamber 18 is formed between the nozzle 20 and the shell 19, and the jet flow inlet 8 and the jet flow outlet 9 are communicated with the annular oil equalizing chamber 18. Thus, by disassembling the nozzle 20 and the housing 19, the annular oil-equalizing chamber 18 is formed in the jet device 7, and the jet inlet 8 and the jet outlet 9 are communicated with the annular oil-equalizing chamber 18.
In addition, in the oil suction assembly, the annular oil-equalizing chamber 18 may be formed in various ways, for example, in a way that an annular groove is formed in the housing 19, and after the nozzle 20 is assembled in the housing 19, the annular oil-equalizing chamber 18 is enclosed between the nozzle 20 and the annular groove. Alternatively, referring to the embodiment shown in fig. 3 and 4 and the embodiment shown in fig. 5 and 6, the nozzle 20 includes a nozzle holder body 21, and an annular groove 22 is formed on the outer peripheral surface of the nozzle holder body 21, so that after the nozzle holder body 21 is assembled in the housing 19, the housing 19 and the annular groove 22 seal and enclose the annular oil-distributing chamber 18.
In addition, in order to facilitate the nozzle 20 to be more stably and reliably assembled in the housing 19, in an embodiment, referring to the embodiment shown in fig. 3 and 4 and the embodiment shown in fig. 5 and 6, an assembling section 23 is formed on the outer circumferential surface of the nozzle holder body 21, the assembling section 23 having an outer diameter smaller than the inner groove wall 24 of the annular groove 22 and being connected to the inner groove wall 24, for example, the assembling section 23 and the inner groove wall 24 are integrally formed, wherein the assembling section 23 is assembled in the assembling hole of the housing 19, and the inner groove wall 24 axially stops on the orifice edge wall of the assembling hole, referring to fig. 2, so that the inner groove wall 24 and the outer groove wall of the annular groove 22 are in abutting fit with the inner surface of the housing 19, and at the same time, the assembling section 23 and the assembling hole of the housing 19 are in insertion fit, and therefore, the assembling reliability of the nozzle and the housing.
In addition, the jet outlet 9 and the annular oil-equalizing chamber 18 may have various communication modes, for example, in the first communication mode, the central jet outlet 9 and the annular oil-equalizing chamber 18 are communicated through an oil pipe.
Alternatively, in a second communication mode, referring to fig. 1, 2, 3 and 4, a jet flow passage 25 is formed in the nozzle housing body 21, the jet flow passage includes the jet flow passage 25, and the annular groove 22 is disposed around the jet flow passage 25, wherein a plurality of through holes 27 communicating the annular oil-equalizing chamber 18 with the jet flow passage 25 are formed in a groove bottom wall 26 of the annular groove 22, the nozzle 20 includes a nozzle needle 28 having the jet outlet 9, and a part of a tube section of the nozzle needle 28 is fitted in the jet flow passage 25, for example, so that a central jet flow is formed. Thus, the high-pressure oil stored in the annular oil equalizing chamber 18 can enter the jet flow passage 25 through the plurality of through holes 27 and be injected into the oil inlet passage 2, for example, the inside diameter tapered section 10, through the central nozzle needle tube 28.
Alternatively, in a third communication mode, referring to fig. 5 and 6, the nozzle 20 includes a plurality of nozzle needle tubes 28 having the jet outlet 9, wherein the plurality of nozzle needle tubes 28 are disposed on the nozzle holder body 21 and are circumferentially spaced and uniformly distributed around the central axis of the nozzle holder body 21, and the plurality of nozzle needle tubes 28 are communicated with the annular oil-distributing chamber 18. For example, a plurality of nozzle needles 28 may be inserted into the inner wall of the annular groove to communicate with the annular oil-equalizing chamber 18. In this way, an annular jet flow is formed, so that the high-pressure oil stored in the annular oil-equalizing chamber 18 can be injected into the oil inlet passage 2, for example, the inner diameter-reduced section 10, through the plurality of nozzle needle pipes 28. Alternatively, when the nozzle includes the mounting section 23, a plurality of nozzle needle tubes 28 may be inserted on an axial end surface of the mounting section 23 and communicate with the annular oil-equalizing chamber 18. Alternatively, the nozzle needle 28 is integrally formed with the inner groove wall, or the nozzle needle 28 is integrally formed with the inner groove wall and the fitting section 23.
Alternatively, in the fourth communication mode, the jet flow passage 25 is formed in the nozzle holder body 21, the annular groove 22 is arranged around the jet flow passage 25, wherein the groove bottom wall 26 of the annular groove 22 is formed with a plurality of through holes 27 communicating the annular oil-equalizing chamber 18 with the jet flow passage 25, the nozzle 20 includes a nozzle needle 28 having the jet flow outlet 9, and a part of the nozzle needle 28 is fitted in the jet flow passage 25, for example, so that a central jet flow is formed. Meanwhile, a plurality of nozzle needle tubes 28 are arranged on the nozzle base body 21 and are circumferentially and evenly distributed around the central axis of the nozzle base body 21 at intervals, and the plurality of nozzle needle tubes 28 are communicated with the annular oil-distributing chamber 18 to form annular jet flow. Thus, the high pressure oil in the annular oil-equalizing chamber 18 can form both the central jet and the annular jet.
In addition, referring to fig. 1 and 2, the oil suction assembly 29 may include a gear pump oil suction pipe 30, and the gear pump oil suction pipe 30 is connected to the pipe body 1, for example, the second radial section 12, so that, in actual use, the mixed high-pressure oil can be supplied to the gear pump through the gear pump oil suction pipe 3.
Finally, the present invention provides a hydraulic oil circuit system, referring to fig. 7, comprising a hydraulic oil tank 3, a hydraulic pump 5 and an oil suction assembly 29 as described in any of the above, wherein the hydraulic oil tank connection portion 4 is connected to the hydraulic oil tank 3, and the hydraulic pump connection portion 6 is connected to the hydraulic pump 5. Therefore, as mentioned above, the oil pipe fitting can improve the oil suction capacity of the hydraulic pump for sucking oil from the hydraulic oil tank, increase the oil suction capacity of the hydraulic pump and the pressure of a suction inlet of the hydraulic pump, avoid the separation of bubbles at the suction inlet of the hydraulic pump caused by low pressure, reduce the suction effect of the hydraulic pump, and further improve the volumetric efficiency and the service life of the hydraulic pump.
Finally, the invention provides an engineering machine comprising a hydraulic oil circuit system as described in any of the above. The work machine may be of any type of work machine, such as a crane, excavator or other work machine.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (16)
1. An oil absorption assembly, comprising:
the oil-feeding device comprises a pipe body (1), wherein an oil-feeding channel (2) is arranged in the pipe body (1);
the hydraulic oil tank connecting part (4), the hydraulic oil tank connecting part (4) is used for connecting the hydraulic oil tank (3);
the hydraulic pump connecting part (6) is used for connecting a hydraulic pump (5), the hydraulic oil tank connecting part (4) is communicated with the inlet of the oil inlet channel (2), and the hydraulic pump connecting part (6) is communicated with the outlet of the oil inlet channel (2);
fluidic device (7), fluidic device (7) include the efflux runner that has efflux entry (8) and efflux export (9), fluidic device (7) set up on body (1) and efflux export (9) are located in oil feed passageway (2).
2. An oil suction assembly according to claim 1, characterized in that the oil inlet passage (2) comprises an inner diameter tapering section (10), a first diameter tapering section (11) and an inner diameter diverging section (13) arranged in succession in the oil inlet direction, wherein the jet outlet (9) is located at the inlet side of the inner diameter tapering section (10).
3. An oil suction assembly according to claim 2, wherein the hydraulic tank connection portion (4) is connected to an inlet side of the inner diameter-tapered section (10) and extends radially outwardly from the inlet side of the inner diameter-tapered section (10);
and/or the presence of a gas in the gas,
the oil inlet channel (2) comprises a second equal-diameter section (12) connected with the large opening end of the inner diameter gradually-expanding section (13).
4. An oil suction assembly as claimed in claim 1, wherein the pipe body (1) is a rigid pipe body, and the oil suction assembly further comprises a hose (14), wherein the end of the pipe body (1) is connected to the hydraulic pump connecting part (6) through the hose (14) in the oil feeding direction of the oil feeding passage.
5. An oil suction assembly as claimed in claim 4, characterized in that the hydraulic pump connection (6) is arranged in a corner with respect to the end of the pipe body (1), the hose (14) being located at the corner to act as an elbow hose.
6. An oil suction assembly according to claim 1, characterized in that the oil suction assembly comprises an auxiliary high pressure oil pipe, one end of the auxiliary high pressure oil pipe is connected with the jet inlet (8), the other end of the auxiliary high pressure oil pipe is used for being connected with a high pressure oil port of the hydraulic pump (5), and the auxiliary high pressure oil pipe is provided with a switch flow limiting unit (15).
7. An oil suction assembly according to claim 6, characterized in that the number of the jet inlets (8) is two and the number of the auxiliary high pressure oil pipes is two, wherein,
one auxiliary high-pressure oil pipe is used as a rear pump auxiliary high-pressure oil pipe (16), one end of the rear pump auxiliary high-pressure oil pipe (16) is connected with one jet flow inlet (8), the other end of the rear pump auxiliary high-pressure oil pipe is used for being connected with a rear pump of a hydraulic pump, and the rear pump auxiliary high-pressure oil pipe (16) is provided with the switch current limiting unit (15);
the other auxiliary high-pressure oil pipe is used as a front pump auxiliary high-pressure oil pipe (17), one end of the front pump auxiliary high-pressure oil pipe (17) is connected with the other jet flow inlet (8), the other end of the front pump auxiliary high-pressure oil pipe is used for being connected with a front pump of a hydraulic pump, and the switch current limiting unit (15) is arranged on the front pump auxiliary high-pressure oil pipe (17).
8. An oil absorption assembly as claimed in claim 1, wherein the jet flow passage comprises an annular oil-equalizing chamber (18), the jet inlet (8) and the jet outlet (9) communicating with the annular oil-equalizing chamber (18).
9. An oil suction assembly as claimed in claim 8, characterized in that one of the jet outlets (9) is arranged on the central axis of the jet means (7) as a central jet outlet (9);
and/or the presence of a gas in the gas,
the jet flow outlets (9) are circumferentially and evenly distributed around the central axis of the jet flow device (7) at intervals.
10. An oil absorption assembly according to claim 8 or 9 wherein the jet means (7) comprises a housing (19) having the jet inlet (8) and a nozzle (20) having the jet outlet (9), wherein the housing (19) is disposed on the pipe body (1) and the nozzle (20) is disposed within the housing (19), an annular oil-equalizing chamber (18) being formed between the nozzle (20) and the housing (19), the jet inlet (8) and the jet outlet (9) being in communication with the annular oil-equalizing chamber (18).
11. An oil absorption assembly as claimed in claim 10, wherein the nozzle (20) comprises a nozzle holder body (21), an annular groove (22) is formed on the outer peripheral surface of the nozzle holder body (21), and the housing (19) and the annular groove (22) seal the annular oil equalizing chamber (18).
12. An oil suction assembly as claimed in claim 11, wherein the nozzle holder body (21) has a mounting section (23) formed on its outer peripheral surface, the mounting section (23) having an outer diameter smaller than an inner groove wall (24) of the annular groove (22) and being connected to the inner groove wall (24), wherein the mounting section (23) is fitted in a mounting hole of the housing (19) and the inner groove wall (24) axially stops on an orifice rim wall of the mounting hole.
13. An oil absorption assembly as claimed in claim 11, wherein a jet flow passage (25) is formed in the nozzle housing (21), the jet flow passage includes the jet flow passage (25), the annular groove (22) is arranged around the jet flow passage (25), wherein a plurality of through holes (27) communicating the annular oil equalizing chamber (18) and the jet flow passage (25) are formed on a groove bottom wall (26) of the annular groove (22);
the nozzle (20) comprises a nozzle needle (28) with the jet outlet (9), a section of the nozzle needle (28) fitting into the jet channel (25).
14. An oil absorption assembly as claimed in claim 11, wherein the nozzle (20) comprises a plurality of nozzle needle tubes (28) having the jet outlet (9), wherein the plurality of nozzle needle tubes (28) are disposed on the nozzle holder body (21) and are circumferentially spaced and equispaced around a central axis of the nozzle holder body (21), and the plurality of nozzle needle tubes (28) are in communication with the annular oil equalizing chamber (18).
15. A hydraulic oil circuit system, characterized by comprising a hydraulic oil tank (3), a hydraulic pump (5) and an oil suction assembly (29) according to any one of claims 1 to 14,
the hydraulic oil tank connecting part (4) is connected with the hydraulic oil tank (3), and the hydraulic pump connecting part (6) is connected with the hydraulic pump (5).
16. A working machine, characterized in that it comprises a hydraulic oil circuit system according to claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110012388.7A CN112727855A (en) | 2021-01-06 | 2021-01-06 | Oil absorption assembly, hydraulic oil circuit system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110012388.7A CN112727855A (en) | 2021-01-06 | 2021-01-06 | Oil absorption assembly, hydraulic oil circuit system and engineering machinery |
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| Publication Number | Publication Date |
|---|---|
| CN112727855A true CN112727855A (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110012388.7A Pending CN112727855A (en) | 2021-01-06 | 2021-01-06 | Oil absorption assembly, hydraulic oil circuit system and engineering machinery |
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| CN1030281A (en) * | 1987-06-22 | 1989-01-11 | 鲍侃 | Flood pump |
| US4892463A (en) * | 1987-09-10 | 1990-01-09 | Deutsche Gesellschaft Fur Wiederaufarbeitung Von Kernbrennstoffen Mbh | Rail mounted ejector |
| CN101290064A (en) * | 2007-04-20 | 2008-10-22 | 丰田自动车株式会社 | vehicle fuel system |
| CN201297487Y (en) * | 2008-12-02 | 2009-08-26 | 沈阳东北电力调节技术有限公司 | Shooting-flow circulating lubrication system |
| JP2014156891A (en) * | 2013-02-15 | 2014-08-28 | Hitachi Constr Mach Co Ltd | Hydraulic transmission |
| CN206309666U (en) * | 2016-12-13 | 2017-07-07 | 四川航空工业川西机器有限责任公司 | Multiple jetses jet pump |
| CN209385415U (en) * | 2018-11-05 | 2019-09-13 | 新乡航空工业(集团)有限公司 | A kind of three nozzle arrangements of jet pump |
-
2021
- 2021-01-06 CN CN202110012388.7A patent/CN112727855A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030281A (en) * | 1987-06-22 | 1989-01-11 | 鲍侃 | Flood pump |
| US4892463A (en) * | 1987-09-10 | 1990-01-09 | Deutsche Gesellschaft Fur Wiederaufarbeitung Von Kernbrennstoffen Mbh | Rail mounted ejector |
| CN101290064A (en) * | 2007-04-20 | 2008-10-22 | 丰田自动车株式会社 | vehicle fuel system |
| CN201297487Y (en) * | 2008-12-02 | 2009-08-26 | 沈阳东北电力调节技术有限公司 | Shooting-flow circulating lubrication system |
| JP2014156891A (en) * | 2013-02-15 | 2014-08-28 | Hitachi Constr Mach Co Ltd | Hydraulic transmission |
| CN206309666U (en) * | 2016-12-13 | 2017-07-07 | 四川航空工业川西机器有限责任公司 | Multiple jetses jet pump |
| CN209385415U (en) * | 2018-11-05 | 2019-09-13 | 新乡航空工业(集团)有限公司 | A kind of three nozzle arrangements of jet pump |
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Application publication date: 20210430 |