WO2022166045A1 - 一种用于子母叶片泵的侧板及双作用子母叶片泵 - Google Patents

一种用于子母叶片泵的侧板及双作用子母叶片泵 Download PDF

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Publication number
WO2022166045A1
WO2022166045A1 PCT/CN2021/097020 CN2021097020W WO2022166045A1 WO 2022166045 A1 WO2022166045 A1 WO 2022166045A1 CN 2021097020 W CN2021097020 W CN 2021097020W WO 2022166045 A1 WO2022166045 A1 WO 2022166045A1
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Prior art keywords
pressure
oil
groove
blade
cavity
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PCT/CN2021/097020
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English (en)
French (fr)
Inventor
王洪继
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台州弘一液压伺服科技有限公司
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Publication of WO2022166045A1 publication Critical patent/WO2022166045A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member

Definitions

  • the invention relates to a vane pump technology, in particular to a double-acting mother and daughter vane pump technology.
  • Vane pump is a kind of shell pressure hydraulic pump with vane as extruder. This kind of pump has a long history of development, and its prototype can often be found in many ancient water lifting tools at home and abroad. There are usually spring-loaded vane pumps and pin-pin vane pumps, depending on how the vanes slide out of the radial chute.
  • the sub-mother vane pump is developed on the basis of the spring pressurized vane pump, which abandons the spring pressurization method and adopts the hydraulic variable pressure pressurization method, so that the vane pump has better performance at low speed and high speed. good feature.
  • relevant books or patent documents such as Chinese utility model patent documents with publication numbers CN209261810U or CN209761714U.
  • the multi-acting vane pump there are usually single-acting vane pumps and multi-acting vane pumps according to the number of oil suction and oil pressure cycles completed by one rotation of the rotor.
  • the multi-acting vane pump it is usually a double-acting vane pump.
  • the rotor and stator of the vane pump are coaxial.
  • the rotor is provided with evenly distributed radial sliding grooves, and the blades are installed in the radial sliding grooves of the rotor and can be flexibly retracted.
  • the rotor, blades and stator are all sandwiched between the front and rear side plates.
  • the vanes divide the space formed between the two side plates and the rotor and stator into sealed vane cavities with the same number of vanes (both are even numbers) along the circumference.
  • the mother and daughter blades need to slide against each other through the pressure difference.
  • the mother blade is pressed against the inner surface of the stator under the action of centrifugal force and the pressure oil passing through the gap between the high-pressure oil groove and the high-pressure chamber connecting the child and mother blades.
  • the gap between the child and mother blades gradually increases, and the pressure at the bottom of the blade groove that communicates with the blade cavity also gradually increases, but the high-pressure oil pressure in the gap between the child and mother blades is the same as the blade groove bottom.
  • the mother blade is still in close contact with the inner surface of the stator.
  • the mother blade begins to be compressed by the surface of the inner cavity of the stator and shrinks, and the gap between the mother blade and the mother blade begins to gradually decrease.
  • the damping oil passage on the high-pressure oil groove communicating with the blade gap it is difficult for the pressure in the blade gap to quickly balance with the high-pressure cavity.
  • the instantaneous pressure on the surface of the mother blade and the inner cavity of the stator is too large. , which causes the wear of the oil pressure area on the surface of the inner cavity of the stator to be too fast, resulting in early failure of various parameters on the inner surface of the stator, which in turn affects the service life and reliability of the product.
  • an object of the present invention is to provide a side plate for a sub-vane pump, and at the same time, also provide a double-acting sub-vane pump using the side plate, which passes the high pressure on the side plate at the side plate.
  • balance groove between the oil groove and the high pressure groove, which can effectively balance the high pressure of the mother blade at the oil pressure dead point position, thereby effectively reducing the wear of the oil pressure area on the surface of the stator cavity at this position, and effectively improving the service life of the product reliability.
  • the present invention adopts the following technical solutions to realize:
  • a side plate for a sub-mother vane pump comprising a first ring structure positioned on the outer peripheral side, and an oil suction window communicating with a low pressure chamber of the vane pump and an oil suction window communicating with the low pressure chamber of the vane pump and the The oil pressure window communicated with the high pressure chamber of the vane pump;
  • the third ring structure is positioned on the inner peripheral side, and the third ring structure is provided with the oil suction window and the oil pressure window respectively and arranged at intervals a low-pressure groove and a high-pressure groove;
  • a second ring structure positioned between the first ring structure and the third ring structure, a high-pressure oil groove communicating with the high-pressure chamber is provided on the second ring structure;
  • the high pressure oil tank communicates with the high pressure tank through a balance tank;
  • the high pressure oil tank communicates with the high pressure chamber through a damping oil passage.
  • the setting of the balance slot makes up for the rapid increase in the pressure in the blade gap caused by the rapid change in the diameter of the inner cavity surface of the stator and the current limiting effect of the damping oil passage when the blade assembly is close to the oil pressure dead point, thereby effectively solving the problem. It solves the technical problem that the oil pressure area on the surface of the inner cavity of the stator is seriously worn, which in turn affects the service life and reliability of the product.
  • the balance groove extends obliquely.
  • the balance groove By setting the balance obliquely, it can be ensured that the pressure in the blade gap can have a certain rotation angle for a long time, which effectively ensures the balance of the pressure in the blade gap when the rotor rotates rapidly.
  • the balance tank extends obliquely from the high pressure tank to the high pressure oil tank.
  • the arrangement of the balance groove of this structure can better form a corresponding relationship with the gradual indentation of the mother blade, and the pressure balance characteristic is relatively linear.
  • the high pressure oil tank is arranged in sections corresponding to the oil suction window and the oil pressure window, and the damping oil passage communicates with the high pressure oil tank in each section; the opening section of the damping oil passage is smaller than that of the high pressure oil tank.
  • This structure enables the pressure change rate in the high pressure oil groove to gradually decrease from the corresponding oil suction window to the corresponding oil pressure window due to the effect of the damping oil passages between the high pressure oil grooves, thereby improving the pressure balance ability in the blade gap.
  • the high-pressure oil groove is communicated with the high-pressure chamber through a high-pressure oil hole; the high-pressure oil holes are arranged corresponding to two circumferential sides of the oil suction window respectively.
  • a double-acting mother-and-son vane pump comprising a front pump cover, which is provided with an oil outlet and a high-pressure chamber; a rear pump cover, which is provided with an oil inlet and a low-pressure chamber; a stator , an inner cavity is arranged in the stator, and an oil suction hole is arranged on the peripheral wall of the inner cavity; a rotor, the rotor is rotated and arranged in the inner cavity of the stator through a drive shaft, and is connected with the inner cavity A working cavity is formed; the rotor includes a rotor body and a vane assembly; the rotor body is provided with vane grooves that are uniformly distributed in the circumferential direction, and the vane assemblies are slidably arranged in the vane grooves; wherein, the vane assemblies include mutually slidably arranged
  • the mother blade and the sub-blade are provided with a blade gap between the mother blade and the sub-blade; the mother blade is separated in the working cavity to form
  • the setting of the balance slot on the side plate makes up for the rapid increase in the pressure in the blade gap caused by the rapid change of the diameter of the inner cavity surface of the stator and the current limiting effect of the damping oil passage when the blade assembly is close to the oil pressure dead point. Therefore, the technical problem of serious wear of the oil pressure area on the surface of the inner cavity of the stator caused by this can be effectively solved, thereby affecting the service life and reliability of the product.
  • a balance groove is provided between the high pressure oil groove and the high pressure groove of the side plate, so that the high pressure of the mother blade at the oil pressure dead point can be effectively balanced, thereby effectively reducing the surface pressure of the inner cavity of the stator at this position.
  • the wear of the oil area effectively improves the reliability of the service life of the product.
  • FIG. 1 is a schematic structural diagram of a side plate in the present invention.
  • FIG. 2 is a schematic structural diagram of the positional relationship between the rotor and the stator in the present invention.
  • FIG. 3 is a schematic structural diagram of the double-acting mother and daughter vane pump in the present invention.
  • orientation words such as the terms “center”, “horizontal”, “longitudinal”, “length”, “width”, “thickness”, “upper”, “lower” , “Front”, “Back”, “Left”, “Right”, “Vertical”, “Horizontal”, “Top”, “Bottom”, “Inside”, “Outside”, “Clockwise”, “Counterclockwise” ” etc.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or indicating the number of technical features.
  • definition of “first” and “second” features may expressly or implicitly include one or more of the features, and in the description of the present invention, “several” means two or more, unless otherwise There are clear and specific restrictions.
  • the terms “assembled”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated It can be connected to the ground; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two components can be connected internally.
  • the specific meanings of the above terms in the present invention can be understood according to specific situations.
  • a side plate 4 for a sub-vane pump includes a first side plate 41 and a second side plate 42 that are close to both sides of the vane pump rotor 3.
  • the backs of the side plate 41 and the second side plate 42 are provided with ear-shaped oil sealing areas (not shown in the figure), and the first side plate 41 and the second side plate 42 are pressed against the side of the stator 2 by introducing high pressure oil. , to ensure that the volumetric efficiency of the vane pump is not reduced by the increase of the axial clearance.
  • the surface of the side plate 4 relative to the direction of the rotor 3 is sequentially provided with a first ring structure, a second ring structure and a third ring structure from the outside to the inside.
  • the first ring structure is provided with an oil suction window 43 communicating with the low pressure chamber 11 of the vane pump and an oil pressure window 44 communicating with the high pressure chamber 52 of the vane pump.
  • a high-pressure oil groove 47 is provided on the second ring structure, and the high-pressure oil groove 47 is provided with a high-pressure oil hole 472 and a damping oil passage 471 communicating with the high-pressure chamber 52 .
  • the high-pressure oil hole 472 is used for inputting pressure from the high-pressure chamber 52 to the high-pressure oil groove 47
  • the damping oil passage 471 is used for releasing pressure into the high-pressure chamber 52 .
  • the third ring structure is provided with a low pressure groove 45 corresponding to the oil suction window 43 and a high pressure groove 46 corresponding to the oil pressure window 44 .
  • a balance groove 473 communicated with the high pressure groove 46 is provided on the high pressure oil groove 47 corresponding to the position of the oil pressure window 44 .
  • the vane pump is a double-acting vane pump. Therefore, the above-mentioned oil suction window 43, oil pressure window 44, high pressure oil hole 472, damping oil passage 471, low pressure groove 45 and high pressure groove 46 are on the side
  • the plates 4 are arranged in pairs in the circumferential direction.
  • the double-acting vane pump includes a rear pump cover 1 , a front pump cover 5 , a drive shaft 8 , a stator 2 , a side plate 4 and a rotor 3 .
  • the side plate 4 includes a first side plate 41 and a second side plate 42 .
  • the rear pump cover 1 is provided with an oil inlet 10 and a low pressure chamber 11
  • the front pump cover 5 is provided with a high pressure chamber 52 and an oil outlet 51
  • the stator 2 is provided with an inner cavity, and an oil suction hole 21 communicated with the low pressure cavity 11 is arranged on the inner cavity wall.
  • the rotor 3 includes a rotor body 31 and a blade assembly 32 .
  • the working chamber 6 of the vane pump is formed between the rotor body 31 and the inner chamber of the stator.
  • the rotor body 31 is provided with vane grooves 311 that are evenly distributed in the circumferential direction, and the vane assemblies 32 are slidably arranged in the vane grooves 311 .
  • a blade root cavity 313 is provided at the bottom of the blade groove 311 , which communicates with the working cavity 6 through a groove bottom oil passage 312 arranged obliquely.
  • the blade root cavity 313 communicates with the low pressure groove 45 and the high pressure groove 46 on the side plate 4 in sequence.
  • the blade assembly 32 includes a mother blade 321 and a sub-blade 322 .
  • the mother blade 321 is positioned upstream of the blade slot 311
  • the sub-blade 322 is positioned downstream of the blade slot 311 , that is, close to the blade root cavity 313 .
  • the bottom side of the mother blade 321 is provided with a groove, the sub-blade 322 is slidably arranged in the groove, and a blade gap 323 is formed in the groove between the sub-blade 322 and the mother blade 321 .
  • a slot-in-slot cavity 314 is provided on the side wall of the vane slot 311 , and the position of the slot-in-slot cavity 314 corresponds to the vane gap 323 and communicates with the vane gap 323 .
  • the working chamber 6 of the double-acting vane pump is divided into two sections, namely the oil suction section and the oil pressure section.
  • the blade clearance 323 changes from gradually increasing to decreasing.
  • the pressure oil in the vane clearance 323 also changes from input to output.
  • the blade cavity 7 corresponding to the blade root cavity 313 is in the oil suction section, and its pressure is relatively low.
  • the damping oil passage 471 is provided between the high pressure oil groove 47 communicating with the vane gap 323 and the high pressure chamber 52, there is a pressure difference between the pressure in the vane chamber 7 and the pressure in the vane gap 323, and the pressure at the top of the mother vane 321 gradually increases.
  • the high-pressure oil groove 47 communicating with the vane gap 323 begins to communicate with the balance groove 473, and the pressure in the rapidly increasing vane gap 323 passes through the balance groove 473 and the high-pressure groove 46 in turn.
  • the balance slot 473 extends in a positive oblique direction, so that the pressure in the blade gap can have a certain rotation angle for a long time, which effectively ensures the balance of the pressure in the blade gap when the rotor rotates rapidly.
  • the forward oblique extension mentioned here refers to the oblique extension according to the forward rotation direction of the rotor.
  • the oblique arrangement of the balance groove can also be extended in a reverse oblique direction, that is, it is obliquely arranged from the high pressure tank to the high pressure oil tank in the opposite direction of rotation. It is determined where the pressure needs to be released or how quickly the pressure is released.
  • the setting in this embodiment that is, the positive oblique extension setting, makes the communication point between the balance groove and the high-pressure oil groove closer to the dead point of the oil pressure. This setting reduces the wear of the oil pressure area on the surface of the stator cavity, Avoid emptying of the mother vane and affect the output pressure of the vane pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

一种用于子母叶片泵的侧板及双作用子母叶片泵，包括定位在外周侧上与低压腔（11）连通的吸油窗（43）和与高压腔（52）连通的压油窗（44）；定位在内周侧上分别与吸油窗（43）和压油窗（44）对应的低压槽（45）和高压槽（46）；在外周侧与内周侧之间设有与高压腔（52）连通的高压油槽（47）；高压油槽（47）通过平衡槽（473）与高压槽（46）连通；高压油槽（47）通过阻尼油道（471）与高压腔（52）连通。通过在侧板（4）的高压油槽（47）与高压槽（46）之间设有平衡槽（473），使母叶片（321）在压油止点位置时的高压得到有效平衡，减少在该位置时定子（2）内腔表面压油区的磨损。

Description

一种用于子母叶片泵的侧板及双作用子母叶片泵 技术领域
本发明涉及一种叶片泵技术，尤其涉及一种双作用子母叶片泵技术。
 背景技术
叶片泵是一种以叶片为挤子的壳体承压型液压泵，此种泵的发展历史悠久，在国内外许多古老的提水工具中常可以找到它的雏形。根据叶片从径向滑槽中滑出方式通常有弹簧加压叶片泵和柱销叶片泵。而子母叶片泵是在弹簧加压叶片泵的基础上发展而，其摒弃了采用弹簧加压的方式而采用液压变压力加压的方式，使得叶片泵无论在低转速和高转速均有较好的特性。有关子母叶片泵的结构可参考相关书籍或专利文献，如公开号为CN209261810U或CN209761714U的中国实用新型专利文献。
根据转子旋转一周所完成的吸油和压油循环次数通常有单作用叶片泵和多作用叶片泵。在多作用叶片泵中通常为双作用叶片泵。叶片泵的转子和定子同轴。转子上开有均匀分布的径向滑槽，叶片安装在转子的径向滑槽内并可灵活伸缩。转子、叶片、定子都夹在前后两个侧板中间。叶片将两个侧板和转子及定子间形成的空间沿圆周分割为与叶片数量（均为偶数）相同的密封叶片腔。由于转子和定子间的径向距离在过渡曲线段沿圆周变化，故在转子旋转的过程中，子母叶片需通过压力差作相互滑动。转子在正向旋转时，母叶片受离心力和通过高压油槽与高压腔连通子母叶片之间的间隙所通压力油的作用而使母叶片紧贴定子内表面。当叶片吸油区段时，子母叶片之间的间隙呈逐渐增大，与叶片腔连通的叶片槽底部的压力也逐渐增大，但子母叶片之间间隙的高压油压力与叶片槽底的压力仍存在一个压力差，母叶片仍与定子内表面贴紧。而叶片在压油区段时，母叶片开始受到定子内腔表面的压缩而缩入，子母叶片之间的间隙开始逐渐减小。但由于与叶片间隙连通的高压油槽上的阻尼油道的作用，叶片间隙中的压力很难快速与高压腔达成平衡，在转子快速转动中，造成母叶片与定子内腔表面的瞬时压力过大，从而造成定子内腔表面压油区的磨损过快，导致定子内表面的各种参数提前失效，进而影响了产品的使用寿命和可靠性。
 技术问题
为了克服现有技术中母叶片在压油止点位置时，由于阻尼油道的作用而形成的高压力造成定子内腔表面压油区的磨损过快，影响叶片泵使用寿命和使用可靠性的技术问题，本发明的一个目的在于提供一种用于子母叶片泵的侧板，同时，也提供一种采用该侧板的双作用子母叶片泵，其通过在侧板在侧板的高压油槽与高压槽之间设有一平衡槽，使母叶片在压油止点位置时的高压得到有效平衡，从而有效减少在该位置时定子内腔表面压油区的磨损，有效提高产品的使用寿命的可靠性。
 技术解决方案
为了实现上述目的，本发明采用如下技术方案实现：
一种用于子母叶片泵的侧板，包括定位在外周侧上的第一圈结构，在所述第一圈结构上设有与所述叶片泵的低压腔连通的吸油窗和与所述叶片泵的高压腔连通的压油窗；定位在内周侧上第三圈结构，在所述第三圈结构上设有分别与所述吸油窗和所述压油窗对应且呈间隔设置的低压槽和高压槽；和定位在所述第一圈结构与所述第三圈结构之间的第二圈结构，在所述第二圈结构上设有一与所述高压腔连通的高压油槽；在对应所述压油窗位置，所述高压油槽通过一平衡槽与所述高压槽连通；在靠近所述压油窗位置，所述高压油槽通过一阻尼油道与所述高压腔连通。通过平衡槽的设置弥补了当叶片组件在靠近压油止点位置时，定子内腔表面径长的迅速变化以及阻尼油道的限流作用而引起叶片间隙中迅速增大的压力，从而有效解决了因此造成的定子内腔表面压油区磨损严重，进而影响产品使用寿命和可靠性的技术问题。
作为优选，所述平衡槽呈斜向延伸。通过斜向设置平衡可以保证叶片间隙中的压力可以有一定的转动角的作用时长，有效保证转子快速转动时的叶片间隙中压力的平衡。
作为优选，所述平衡槽呈从所述高压槽向所述高压油槽正斜向延伸。该结构的平衡槽设置可以较好地形成与母叶片逐渐缩入的对应关系，压力平衡特征较为线性。
作为优选，所述高压油槽呈对应所述吸油窗和压油窗分段设置，所述阻尼油道连通各段所述高压油槽；所述阻尼油道开口截面小于所述高压油槽的开口截面。该结构使得高压油槽中的压力变化速率由于各高压油槽之间的阻尼油道的作用，从对应的吸油窗向对应的压油窗方向呈逐渐下降，从而提高叶片间隙中的压力平衡能力。
具体地，所述高压油槽通过一高压油孔与所述高压腔连通；所述高压油孔的设置分别对应在所述吸油窗的周向二侧。
一种双作用子母叶片泵，包括前泵盖，在所述前泵盖设有出油口和高压腔；后泵盖，在所述后泵盖上设有进油口和低压腔；定子，在所述定子中设有一内腔，在所述内腔的周壁上设有一吸油孔；转子，所述转子通过一驱动轴转动设置在所述定子的内腔中，并与所述内腔形成工作腔；所述转子包括转子体和叶片组件；所述转子体设有呈周向均布的叶片槽，所述叶片组件滑动设置在所述叶片槽中；其中，所述叶片组件包括相互滑动设置的母叶片和子叶片，所述母叶片与子叶片之间设有一叶片间隙；所述母叶片在所述工作腔中分隔形成叶片腔；在所述叶片槽中设有定位在所述叶片槽底部的叶根腔和设置在所述叶片槽侧壁上并与所述叶片间隙连通的槽中腔；在所述转子上设有连通所述叶片腔与所述叶根腔的槽底油道；所述侧板上的吸油窗和压油窗分别设有二个，且呈周向相互间隔设置；所述低压槽和所述高压槽分别与所述吸油窗和所述压油窗对应设置，并通过所述槽底油道连通所述叶片腔连通；所述槽中腔通过所述侧板上的高压油槽与所述高压腔连通。通过侧板上平衡槽的设置弥补了当叶片组件在靠近压油止点位置时，定子内腔表面径长的迅速变化以及阻尼油道的限流作用而引起叶片间隙中迅速增大的压力，从而有效解决了因此造成的定子内腔表面压油区磨损严重，进而影响产品使用寿命和可靠性的技术问题。
 有益效果
本发明通过在侧板在侧板的高压油槽与高压槽之间设有一平衡槽，使母叶片在压油止点位置时的高压得到有效平衡，从而有效减少在该位置时定子内腔表面压油区的磨损，有效提高产品的使用寿命的可靠性。
 附图说明
图1为本发明中侧板的结构示意图。
图2为本发明中转子与定子的位置关系结构示意图。
图3为本发明中双作用子母叶片泵的结构示意图。
图中：1、后泵盖；10、进油口；11、低压腔；2、定子；21、吸油孔；3、转子；31、转子体；311、叶片槽；312、槽底油道；313、叶根腔；314、槽中腔；32、叶片组件；321、母叶片；322、子叶片；323、叶片间隙；4、侧板；41、第一侧板；42、第二侧板；43、吸油窗；44、压油窗；45、低压槽；46、高压槽；47、高压油槽；471、阻尼油道；472、高压油孔；473、平衡槽；5、前泵盖；51、出油口；52、高压腔；6、工作腔；7、叶片腔；8、驱动轴。
 本发明的最佳实施方式
下面，结合附图以及具体实施方式，对本发明做进一步描述，需要说明的是，在不相冲突的前提下，以下描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例。
在本发明的描述中，需要说明的是，对于方位词，如有术语“中心”， “横向”、“纵向”、“长度”、“宽度”、“厚度”、“上”、“下”、 “前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示方位和位置关系为基于附图所示的方位或位置关系，仅是为了便于叙述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定方位构造和操作，不能理解为限制本发明的具体保护范围。
此外，如有术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或隐含指明技术特征的数量。由此，限定有“第一”、“第二”特征可以明示或者隐含包括一个或者多个该特征，在本发明描述 中，“数个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明中，除另有明确规定和限定，如有术语“组装”、“相连”、“连接”术语应作广义去理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；也可以是机械连接；可以是直接相连，也可以是通过中间媒介相连，可以是两个元件内部相连通。对于本领域普通技术人员而言，可以根据具体情况理解上述的术语在本发明中的具体含义。
参见图1、图2和图3，一种用于子母叶片泵的侧板4，包括紧贴于叶片泵转子3两侧设置的第一侧板41和第二侧板42，在该第一侧板41和第二侧板42的背面设有耳形封油区（图上未示），通过引入高压油将该第一侧板41和第二侧板42压紧在定子2的侧面上，确保叶片泵的容积效率不受轴向间隙的增大而降低。因该第一侧板41和第二侧板42在与转子3关联的部分结构完全相同，以下在对该第一侧板41和第二侧板42结构描述时仅以侧板4指代。该侧板4相对于转子3方向的面上从外到内依次设有第一圈结构、第二圈结构和第三圈结构。在第一圈结构上设有与叶片泵的低压腔11连通的吸油窗43和与叶片泵的高压腔52连通的压油窗44。在第二圈结构上设有高压油槽47，该高压油槽47设有与高压腔52连通的高压油孔472和阻尼油道471。其中，高压油孔472用于从高压腔52中向高压油槽47中输入压力，而阻尼油道471用于向高压腔52中释放压力。在第三圈结构上设有与吸油窗43对应的低压槽45和与压油窗44对应的高压槽46。在对应于压油窗44位置的高压油槽47上设有一与高压槽46连通的平衡槽473。在本实施例中，该子母叶片泵为双作用子母叶片泵，因此，上述吸油窗43、压油窗44、高压油孔472、阻尼油道471、低压槽45和高压槽46在侧板4的周向上呈成对设置。该双作用子母叶片泵包括后泵盖1、前泵盖5、驱动轴8、定子2、侧板4和转子3。其中，该侧板4包括第一侧板41和第二侧板42。在该后泵盖1上设有进油口10和低压腔11，在该前泵盖5上设有高压腔52和出油口51。该定子2中设有一内腔，并在内腔壁上设有一与低压腔11连通的吸油孔21。该转子3包括转子体31和叶片组件32。转子体31与定子内腔之间形成叶片泵的工作腔6。在转子体31上设有呈周向均布的叶片槽311，叶片组件32滑动设置在该叶片槽311中。在该叶片槽311的底部设有一叶根腔313，其通过一斜向设置的槽底油道312与工作腔6连通。当转子转动时，该叶根腔313依次与侧板4上的低压槽45和高压槽46对应连通。当叶片组件32包括母叶片321和子叶片322。其中，母叶片321定位在叶片槽311的上游，子叶片322定位在叶片槽311的下游，即靠近叶根腔313的位置。母叶片321的底侧设有一凹槽，子叶片322滑动设置在该凹槽中，子叶片322与母叶片321之间在该凹槽中形成一叶片间隙323。在叶片槽311的侧壁上设有一槽中腔314，该槽中腔314的位置对应于叶片间隙323，并与叶片间隙323连通。当叶片间隙323中输入压力时，母叶片321向工作腔6滑出并与定子内腔周面抵接，在各母叶片321之间形成叶片腔7。当转子3转动时，侧板4上的低压槽45和高压槽46依次通过转子3上的叶根腔313及槽底油道312与对应位置的叶片腔7连通。当转子3正向转动时，双作用叶片泵的工作腔6分为两个区段，即吸油区段和压油区段。在转子3从吸油区段向压油区段转动过程中，叶片间隙323产生从逐渐增大到逐渐减少的变化。叶片间隙323中压力油也产生从输入向输出的变化。在吸油区段时，对应叶根腔313的叶片腔7处于吸油区，其压力较低，转子3上的母叶片321在离心力及由侧板4上的高压油槽47经槽中腔314输入叶片间隙323的高压油作用下向外滑出，并随着叶片腔7压力增大，进而叶根腔313压力增大作用下使母叶片321顶端保持与定子2内表面抵接，对叶片腔7形成有效的密封。当转子3转动到压油区时，母叶片321在定子2内周面的作用下回缩，叶片间隙323空间受压。由于与叶片间隙323连通的高压油槽47与高压腔52之间设有阻尼油道471，叶片腔7中的压力与叶片间隙323中的压力存在一个压力差，母叶片321顶端压力逐渐增大。当转子3转动到靠近压油止点位置时，与叶片间隙323连通的高压油槽47开始与平衡槽473连通，迅速增大的叶片间隙323中的压力依次通过该平衡槽473和高压槽46向高压腔52释放，使母叶片321顶端的压力得到有效平衡，从而有效减少了母叶片321顶端的磨损，大大提高了叶片泵的使用寿命和可靠性。在本实施例中，该平衡槽473呈正斜向延伸，使得叶片间隙中的压力可以有一定的转动角的作用时长，有效保证转子快速转动时的叶片间隙中压力的平衡。这里所述的正斜向延伸，是指根据转子正向转动方向的斜向延伸。根据该原理，本领域技术人员应当知道，该平衡槽的斜向设置，也可以是反斜向延伸，即，从高压槽按转动方向反向向高压油槽斜向设置，具体设置可根据母叶片需要释放压力的位置或压力释放快慢决定。如，在本实施例中的设置，即，正斜向延伸设置，使得平衡槽与高压油槽的连通点更靠近压油的止点，该设置在减少定子内腔表面压油区磨损的同时，避免母叶片发生脱空而影响叶片泵的输出压力。
上述实施方式仅为本发明的优选实施方式，不能以此来限定本发明保护的范围，本领域的技术人员在本发明的基础上所做的任何非实质性的变化及替换均属于本发明所要求保护的范围。

Claims (10)

  1. 一种用于子母叶片泵的侧板，包括：定位在外周侧上的第一圈结构，在所述第一圈结构上设有与所述叶片泵的低压腔连通的吸油窗和与所述叶片泵的高压腔连通的压油窗；定位在内周侧上第三圈结构，在所述第三圈结构上设有分别与所述吸油窗和所述压油窗对应且呈间隔设置的低压槽和高压槽；和定位在所述第一圈结构与所述第三圈结构之间的第二圈结构，在所述第二圈结构上设有一与所述高压腔连通的高压油槽；其特征在于，在对应所述压油窗位置，所述高压油槽通过一平衡槽与所述高压槽连通；在靠近所述压油窗位置，所述高压油槽通过一阻尼油道与所述高压腔连通。
  2. 如权利要求1所述的侧板，其特征在于，所述平衡槽呈斜向延伸。
  3. 如权利要求1或2所述的侧板，其特征在于，所述平衡槽呈从所述高压槽向所述高压油槽正斜向延伸。
  4. 如权利要求1或2所述的侧板，其特征在于，所述高压油槽呈对应所述吸油窗和压油窗分段设置，所述阻尼油道连通各段所述高压油槽；所述阻尼油道开口截面小于所述高压油槽的开口截面。
  5. 如权利要求3所述的侧板，其特征在于，所述高压油槽呈对应所述吸油窗和压油窗分段设置，所述阻尼油道连通各段所述高压油槽；所述阻尼油道开口截面小于所述高压油槽的开口截面。
  6. 如权利要求1或2所述的侧板，其特征在于，所述高压油槽通过一高压油孔与所述高压腔连通；所述高压油孔的设置分别对应在所述吸油窗的周向二侧。
  7. 如权利要求3所述的侧板，其特征在于，所述高压油槽通过一高压油孔与所述高压腔连通；所述高压油孔的设置分别对应在所述吸油窗的周向二侧。
  8. 如权利要求4所述的侧板，其特征在于，所述高压油槽通过一高压油孔与所述高压腔连通；所述高压油孔的设置分别对应在所述吸油窗的周向二侧。
  9. 如权利要求5所述的侧板，其特征在于，所述高压油槽通过一高压油孔与所述高压腔连通；所述高压油孔的设置分别对应在所述吸油窗的周向二侧。
  10. 一种包括权利要求1-9任一所述侧板的双作用子母叶片泵，包括：前泵盖，在所述前泵盖设有出油口和高压腔；后泵盖，在所述后泵盖上设有进油口和低压腔；定子，在所述定子中设有一内腔，在所述内腔的周壁上设有一吸油孔；转子，所述转子通过一驱动轴转动设置在所述定子的内腔中，并与所述内腔形成工作腔；其特征在于，所述转子包括转子体和叶片组件；所述转子体设有呈周向均布的叶片槽，所述叶片组件滑动设置在所述叶片槽中； 其中，所述叶片组件包括相互滑动设置的母叶片和子叶片，所述母叶片与子叶片之间设有一叶片间隙；所述母叶片在所述工作腔中分隔形成叶片腔；在所述叶片槽中设有定位在所述叶片槽底部的叶根腔和设置在所述叶片槽侧壁上并与所述叶片间隙连通的槽中腔；在所述转子上设有连通所述叶片腔与所述叶根腔的槽底油道；所述侧板上的吸油窗和压油窗分别设有二个，且呈周向相互间隔设置；所述低压槽和所述高压槽分别与所述吸油窗和所述压油窗对应设置，并通过所述槽底油道连通所述叶片腔连通；所述槽中腔通过所述侧板上的高压油槽与所述高压腔连通。
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CN209261810U (zh) * 2018-12-13 2019-08-16 南京威巍达液压泵科技有限公司 新型高压子母式叶片泵
CN110131162A (zh) * 2019-06-29 2019-08-16 王洪继 节能叶片泵
CN112648183A (zh) * 2021-02-02 2021-04-13 王洪继 一种用于子母叶片泵的侧板及双作用子母叶片泵

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