Accumulator vertical balance hydro-pneumatic suspension
阅读说明:本技术 蓄能器竖置平衡油气悬挂 (Accumulator vertical balance hydro-pneumatic suspension ) 是由 陈轶杰 韩小玲 郑冠慧 张亚峰 张旭 赵宁 徐梦岩 万义强 于 2020-02-25 设计创作,主要内容包括:本发明公开了一种蓄能器竖置平衡油气悬挂,属于液压机械技术领域。悬挂包括前油气弹簧、前平衡管路、后油气弹簧、后平衡管路、蓄能器和管路接头;前油气弹簧的主油腔油口与前平衡管路的一端连接,前平衡管路的另一端通过管路接头与蓄能器的第一进油口连接;后油气弹簧的主油腔油口与后平衡管路的一端连接,后平衡管路的另一端也通过管路接头与蓄能器的第二进油口连接,形成平衡悬挂。通过前后轮油气弹簧油室连通并外置蓄能器的方式实现单轮冲击载荷的大幅下降,以及轮胎接地能力的显著提升,在矿山机械等领域有着广阔的使用前景。(The invention discloses an energy accumulator vertical balance hydro-pneumatic suspension, and belongs to the technical field of hydraulic machinery. The suspension comprises a front hydro-pneumatic spring, a front balance pipeline, a rear hydro-pneumatic spring, a rear balance pipeline, an energy accumulator and a pipeline joint; the oil port of the main oil cavity of the front hydro-pneumatic spring is connected with one end of a front balance pipeline, and the other end of the front balance pipeline is connected with a first oil inlet of the energy accumulator through a pipeline joint; the oil port of the main oil cavity of the rear hydro-pneumatic spring is connected with one end of a rear balance pipeline, and the other end of the rear balance pipeline is also connected with a second oil inlet of the energy accumulator through a pipeline joint to form a balance suspension. The single-wheel impact load is greatly reduced by communicating the oil chambers of the hydro-pneumatic springs of the front wheel and the rear wheel and externally arranging the energy accumulator, the grounding capacity of the tire is remarkably improved, and the single-wheel impact load-reducing device has a wide application prospect in the fields of mining machinery and the like.)
1. The energy storage ware is erected and is put balanced hydro-pneumatic suspension, including preceding hydro-pneumatic spring (21), preceding balanced pipeline (24), back hydro-pneumatic spring (22), back balanced pipeline (23), energy storage ware (26), pipe joint (27), its characterized in that: an oil port of a main oil cavity of the front hydro-pneumatic spring (21) is connected with one end of a front balance pipeline (24), and the other end of the front balance pipeline (24) is connected with a first oil inlet of an energy accumulator (26) through a pipeline joint (27); an oil port of a main oil cavity of the rear hydro-pneumatic spring (22) is connected with one end of a rear balance pipeline (23), and the other end of the rear balance pipeline (23) is also connected with a second oil inlet of the energy accumulator (26) through a pipeline joint (27) to form balance suspension.
2. The accumulator vertical balance hydro-pneumatic suspension of claim 1, wherein: the energy accumulator (26) is a piston type energy accumulator and is arranged vertically.
3. The accumulator vertical balance hydro-pneumatic suspension of claim 1, wherein: the inner diameters of the front balance pipeline (24) and the rear balance pipeline (23) are not less than 20 mm.
4. The accumulator vertical balance hydro-pneumatic suspension of claim 1, wherein: the front hydro-pneumatic spring (21) and the rear hydro-pneumatic spring (22) comprise a cylinder barrel (1), oil filling holes (7), plug screws (8) for oil drainage, inflation valves (13), upper hinges (14), communication oil ports (18), upper limiting positions (85), oil passing grooves (82) and lower hinges (6), the upper ends of the cylinder barrels (1) of the front hydro-pneumatic spring (21) and the rear hydro-pneumatic spring (22) are provided with the communication oil ports (18), the oil filling holes (7) on the lower hinges (6) and the plug screws (8) for oil drainage are arranged in the same direction as the oil filling holes (7) on the upper hinges (14) and the inflation valves (13), face the outer side of the vehicle and are perpendicular to the axial direction of the communication oil ports (18) on the front hydro-pneumatic spring (21) and the rear hydro-pneumatic spring (22); the communication oil ports (18) of the front hydro-pneumatic spring (21) and the rear hydro-pneumatic spring (22) are arranged in opposite directions, wherein the communication oil port (18) of the front hydro-pneumatic spring (21) faces the rear direction of the vehicle, and the communication oil port (18) of the rear hydro-pneumatic spring (22) faces the front direction of the vehicle.
5. The accumulator vertical balance hydro-pneumatic suspension of claim 4, wherein: an upper limit (85) of an annular structure is machined at one end, facing the rodless oil cavity of the hydro-pneumatic spring, of the upper hinge (14), and the diameter of the outer circle of the upper limit (85) is smaller than that of the inner hole of the cylinder barrel (1).
6. The accumulator vertical balance hydro-pneumatic suspension of claim 5, wherein: an oil passing groove (82) which is circumferentially arranged is machined in the side wall of the upper limit (85), and the oil passing groove (82) is right opposite to the communicating oil port (18).
Technical Field
The invention relates to a vertically-arranged balanced hydro-pneumatic suspension of an energy accumulator, and belongs to the technical field of hydraulic machinery.
Background
The hydro-pneumatic suspension mainly comprises a hydro-pneumatic spring, integrates an elastic element and a damping element, has a certain guiding function on a cylinder body, requires a smaller vehicle body arrangement space, and can meet the requirement of smoothness of an engineering vehicle to the maximum extent by virtue of excellent nonlinear elastic characteristic and good vibration damping performance of the hydro-pneumatic suspension. From the view of the integral structure, the existing oil-gas suspension system applied to the engineering vehicle mainly has two types of independent type and interconnection type; from the form of the oil-gas spring, the oil-gas spring is divided into a single-air-chamber oil-gas separation type, a double-air-chamber oil-gas separation type, a multi-stage pressure type, an oil-gas mixing type and the like. Compared with other suspension systems, the hydro-pneumatic suspension has the characteristics of typical nonlinear variable rigidity and increasement, when a vehicle runs on a flat road surface, the suspension moving stroke is small, the rigidity generated by the elastic medium bearing instantaneous pressure is small, and the requirement on smoothness can be met; when the vehicle runs on the undulating ground, the elastic force changes in a nonlinear way and the rigidity is increased, so that more impact energy can be absorbed, the characteristic of high energy storage ratio per unit mass of gas is exerted, the buffer effect is effectively realized, the phenomena of direct transmission of ground excitation to the vehicle body and 'suspension breakdown' are avoided, the off-road speed of the vehicle is increased, and the maneuverability is improved.
At present, most domestic mining vehicles adopt a 6X4 driving mode, the two rear axles are relatively close in distance, mainly used for bearing the weight of cargos, the prior art mostly adopts a structure of a steel plate spring, the function of balanced suspension is realized through a structural part, namely, the bearing capacity of the two axles is mutually compensated, the limit impact load of a single axle is effectively inhibited, and the phenomenon of axle damage is avoided.
Disclosure of Invention
In view of the above, the invention provides an energy accumulator vertically-arranged balanced hydro-pneumatic suspension, which realizes the great reduction of single-wheel impact load and the obvious improvement of tire grounding capacity in a mode of communicating a front wheel hydro-pneumatic spring oil chamber and a rear wheel hydro-pneumatic spring oil chamber and externally arranging an energy accumulator, and has wide application prospect in the fields of mining machinery and the like.
A vertically-arranged balanced hydro-pneumatic suspension for an energy accumulator comprises a front hydro-pneumatic spring, a front balance pipeline, a rear hydro-pneumatic spring, a rear balance pipeline, the energy accumulator and a pipeline joint; an oil port of a main oil cavity of the front hydro-pneumatic spring is connected with one end of a front balance pipeline, and the other end of the front balance pipeline is connected with a first oil inlet of the energy accumulator through a pipeline joint; the oil port of the main oil cavity of the rear hydro-pneumatic spring is connected with one end of a rear balance pipeline, and the other end of the rear balance pipeline is also connected with a second oil inlet of the energy accumulator through a pipeline joint to form a balance suspension.
Further, the energy accumulator is a piston type energy accumulator and is arranged vertically.
Further, the inner diameter of the front balance pipeline and the inner diameter of the rear balance pipeline are not less than 20 mm.
Furthermore, the front hydro-pneumatic spring and the rear hydro-pneumatic spring comprise cylinder barrels, oil filling holes, plugs for oil drainage, inflation valves, upper hinges, communicating oil ports, upper limit positions, oil passing grooves and lower hinges, the upper ends of the cylinder barrels of the front hydro-pneumatic spring and the rear hydro-pneumatic spring are provided with the communicating oil ports, the oil filling holes and the plugs for oil drainage on the lower hinges are arranged in the same direction with the oil filling holes and the inflation valves on the upper hinges, face the outer side of the vehicle and are perpendicular to the axial direction of the communicating oil ports on the front hydro-pneumatic spring and the rear hydro-pneumatic spring; the front hydro-pneumatic spring and the rear hydro-pneumatic spring are arranged in opposite directions, wherein the front hydro-pneumatic spring is communicated towards the rear direction of the vehicle, and the rear hydro-pneumatic spring is communicated towards the front direction of the vehicle.
Furthermore, an upper limit of an annular structure is processed at one end, facing the rodless oil cavity of the hydro-pneumatic spring, of the upper hinge, and the diameter of an outer circle of the upper limit is smaller than that of an inner hole of the cylinder barrel.
Furthermore, an oil passing groove which is circumferentially arranged is machined in the side wall of the upper limit and is right opposite to the communicating oil port.
Has the advantages that:
1. the invention provides a balanced hydro-pneumatic suspension structure, which is characterized in that main oil cavities of hydro-pneumatic springs on the same sides of two axles are respectively communicated with two oil ports processed on an energy accumulator through pipelines.
2. The inner diameter of the front and rear balance pipelines is not less than 20mm, the on-way resistance loss of the pipelines can be effectively inhibited, and the superiority of balanced suspension can be fully embodied by testing that the compensation time difference of oil gas spring oil of the front and rear axles is less than 0.05 s.
3. The invention creatively provides that the upper limit is arranged at the hinge position of the hydro-pneumatic spring, so that the condition that the oil compensation is not smooth due to the interference of a communicating oil port with a balanced suspension when a suspension piston is compressed to a limit position is avoided.
4. Compared with the traditional bag type or diaphragm type energy accumulator (the compression ratio is 1: 8), the piston type or diaphragm type energy accumulator has no limitation of the compression ratio, can absorb more impact energy, and prevents the energy accumulator from being broken down and damaged; in addition, when the energy accumulator is vertically arranged, the energy accumulator is conveniently communicated with the front hydro-pneumatic spring and the rear hydro-pneumatic spring respectively, and the optimized pipeline arrangement is realized.
5. The invention adopts the scheme of vertically arranging the piston type energy accumulator, after the balance oil gas is hung on a vehicle, the oil filling hole and the plug for oil drainage on the lower hinge are arranged in the same direction with the oil filling hole and the inflation valve on the upper hinge and face the outer side of the vehicle, so that the oil gas spring is convenient to maintain; in addition, the communication oil ports of the front hydro-pneumatic spring and the rear hydro-pneumatic spring are arranged in opposite directions, wherein the communication oil port of the front hydro-pneumatic spring faces the rear direction of the vehicle, and the communication oil port of the rear hydro-pneumatic spring faces the front direction of the vehicle, so that the lengths of the front balance pipeline and the rear balance pipeline can be shortened to the maximum extent, and the influence of the on-way loss on the balance suspension performance is reduced.
Drawings
FIG. 1 is a schematic diagram of a transversely-arranged balanced hydro-pneumatic suspension structure of an energy accumulator;
FIG. 2 is a schematic diagram of a vertically-arranged balanced hydro-pneumatic suspension structure of an energy accumulator;
FIG. 3 is a front cross-sectional view of the hydro-pneumatic suspension;
FIG. 4 is a left side view of the hydro-pneumatic suspension;
FIG. 5 is a profile view of the hydro-pneumatic suspension;
FIG. 6 is a front cross-sectional view of the guide sleeve;
FIG. 7 is a left side view of the guide sleeve;
FIG. 8 is a front cross-sectional view of the master piston;
FIG. 9 is a left side view of the master piston;
FIG. 10 is a front cross-sectional view of the upper hinge;
fig. 11 is a bottom view of the upper hinge.
In the figure: 21. the oil cylinder comprises a front oil-gas spring, 22 a rear oil-gas spring, 23 a rear balance pipeline, 24 a front balance pipeline, 25 a three-way joint, 26 an energy accumulator, 27 a pipeline joint, 1 a cylinder barrel, 2 a piston rod, 3 a guide sleeve, 4 a steel ball, 5 a main piston, 6 a lower hinge, 7 an oil filling hole, 8 a plug, 9 a piston bolt, 10 a piston rod inner hole, 11 an oil drainage channel, 12 an inflation valve cap, 13 an inflation valve, 14 an annular cavity, 14 an upper hinge, 15 a small throttling hole, 16 a large throttling hole, 17 a guide sleeve bolt, 18 a communication oil port, 19 a large outer circle, 20 a small outer circle, 31 a guide threaded through hole, 32 a first guide belt, 33 a static seal, 34 a protection ring, 35 a dust ring, 36 a first oil seal, 37 a second oil seal, 38 a second guide belt, 39 a small guide outer circle, 40 a guide, 51 a piston inner hole, 52. the piston comprises an annular end face, 53 piston thread through holes, 54 piston annular bosses, 81 oil filling channels, 82 oil passing grooves, 84 upper hinge excircle and 85 upper limit.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention designs a balanced hydro-pneumatic suspension structure, which has wide application prospect in the fields of mining machinery and multi-shaft heavy-duty carrier vehicles. As shown in fig. 1 and 5, a schematic of a transversely-arranged balanced hydro-pneumatic suspension structure of an energy accumulator is provided, a
As shown in fig. 2 and 5, a schematic diagram of a vertically-arranged balanced hydro-pneumatic suspension structure of an energy accumulator is shown, a
As shown in fig. 1, 2, 3 and 5, after the balance oil gas is hung on a vehicle, the
The working principle of the balanced hydro-pneumatic suspension is as follows, when the front hydro-
In order to ensure that oil liquid in the balanced oil-gas suspension flows smoothly and compensates each other timely, and avoid the problem of idle stroke caused by compensation delay even too large loss along the stroke under the action of impact load, the inner diameters of the
The structure diagram of the hydro-pneumatic spring is shown in fig. 3-11, the upper end of the cylinder barrel 1 is fixedly connected with the
A radial damping valve is processed at the transition position of a
When the hydro-pneumatic
The
As shown in fig. 6-8, a
In addition, as shown in fig. 3, 5, 10 and 11, the communicating
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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