CN115163483A - A hydraulic gear pump - Google Patents

A hydraulic gear pump Download PDF

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Publication number
CN115163483A
CN115163483A CN202210962012.7A CN202210962012A CN115163483A CN 115163483 A CN115163483 A CN 115163483A CN 202210962012 A CN202210962012 A CN 202210962012A CN 115163483 A CN115163483 A CN 115163483A
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China
Prior art keywords
arc groove
gear shaft
end cover
hole
shaped sleeve
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Pending
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CN202210962012.7A
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Chinese (zh)
Inventor
魏列江
张生福
黎义斌
孟庆武
张广志
孙栋栋
张志宇
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Shandong Shijing Hydraulic Equipment Co ltd
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Shandong Shijing Hydraulic Equipment Co ltd
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Priority to CN202210962012.7A priority Critical patent/CN115163483A/en
Publication of CN115163483A publication Critical patent/CN115163483A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0046Internal leakage control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088Lubrication
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096Heating; Cooling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

本发明公开了一种液压齿轮泵,包括主动齿轮轴、唇形密封圈、前端盖、前“8”型套、泵体、后“8”型套、后端盖、从动齿轮轴、定位销孔、泵出口、固定螺栓孔。与现有技术相比,其有益效果是:进行轴承径向力的动态补偿,转动轴之间形成油膜,解决轴承与轴之间旋转时磨损,实现旋转轴的动压浮动状态;对螺旋齿轮旋转啮合输送介质时产生的轴向力进行补偿,解决齿轮受轴向力发生轴向移动;有效缓解由于齿轮接触端面高低压力差发生的倾斜;形成了一个由高压到中压再到低压的开环,引入动态高压油,保持恒定的动压力,带走高温油降低了液压齿轮泵的内部温度,起到润滑与降温的作用。

Figure 202210962012

The invention discloses a hydraulic gear pump, comprising a driving gear shaft, a lip seal, a front end cover, a front "8" type sleeve, a pump body, a rear "8" type sleeve, a rear end cover, a driven gear shaft, a positioning Pin hole, pump outlet, fixing bolt hole. Compared with the prior art, the beneficial effects are: dynamic compensation of the radial force of the bearing, forming an oil film between the rotating shafts, solving the wear between the bearing and the shaft when rotating, and realizing the dynamic pressure floating state of the rotating shaft; The axial force generated when the medium is rotated and meshed is compensated to solve the axial movement of the gear due to the axial force; the inclination due to the high and low pressure difference between the contact end faces of the gear is effectively relieved; an opening from high pressure to medium pressure to low pressure is formed. Ring, introduce dynamic high pressure oil, maintain constant dynamic pressure, take away high temperature oil to reduce the internal temperature of the hydraulic gear pump, and play the role of lubrication and cooling.

Figure 202210962012

Description

一种液压齿轮泵A hydraulic gear pump

技术领域technical field

本发明涉及液压齿轮泵技术领域,具体为一种液压齿轮泵。The invention relates to the technical field of hydraulic gear pumps, in particular to a hydraulic gear pump.

背景技术Background technique

液压齿轮泵广泛应用与国防军工、舰船动力、航天航空、行走机械、医疗设备、重型装备等高端工程领域,作为液压系统提供动力最核心的部件之一,其性能好坏直接决定着液压系统的品质优劣,影响着高端工程装备性能的高低。齿轮泵泄漏会影响齿轮泵容积效率,齿轮泵的磨损会直接或间接降低泵的容积效率、工作寿命,产生噪声等。产生的噪音不仅影响了整个系统的使用性能,同时也对人们的身心健康产生了一定的不利影响。因此,液压齿轮泵的在工作时低泄漏,低噪声,低磨损对整个液压系统安全稳定具有至关重要的作用。所以,在液压齿轮泵设计阶段必须了解泄露,噪声,磨损产生的机理,预防泄漏、磨损和噪声的产生,进而提升液压齿轮泵的性能。液压齿轮泵在工作工程中会出现的径向力、轴向力与高低压区都是导致泵发生磨损与噪声的原因;轴与轴承套在长时间工作的情况下磨损严重,同时转动产生热量与噪音,无法实现高速工况;在泵内部产生热量无法及时消除,改变了介质粘度,降低了泵的性能并增加泄露。如果能够一起解决以上问题,同时可以有效解决泄露、磨损和噪声的问题,目前,国内外都是针对一个点展开主要研究来提升液压齿轮泵的性能,但是提升效果低,对其它问题的性能改善不明显,无法高效做到同时降低齿轮泵的泄露、磨损、噪声及提高它寿命。Hydraulic gear pumps are widely used in high-end engineering fields such as national defense, naval power, aerospace, mobile machinery, medical equipment, and heavy equipment. As one of the core components of hydraulic systems, their performance directly determines the hydraulic system. The quality of the equipment affects the performance of high-end engineering equipment. The leakage of the gear pump will affect the volumetric efficiency of the gear pump, and the wear of the gear pump will directly or indirectly reduce the volumetric efficiency, working life, and noise of the pump. The generated noise not only affects the performance of the entire system, but also has certain adverse effects on people's physical and mental health. Therefore, the low leakage, low noise and low wear of the hydraulic gear pump play a vital role in the safety and stability of the entire hydraulic system. Therefore, in the design stage of hydraulic gear pump, it is necessary to understand the mechanism of leakage, noise and wear, prevent leakage, wear and noise, and then improve the performance of hydraulic gear pump. Radial force, axial force and high and low pressure areas that occur in the hydraulic gear pump in the work project are all causes of wear and noise of the pump; the shaft and bearing sleeve are seriously worn under the condition of long-term work, and heat is generated by rotation at the same time High-speed working conditions cannot be achieved due to noise and noise; the heat generated inside the pump cannot be eliminated in time, which changes the viscosity of the medium, reduces the performance of the pump and increases leakage. If the above problems can be solved together, and the problems of leakage, wear and noise can be effectively solved at the same time, at present, the main research at home and abroad is to improve the performance of hydraulic gear pumps at one point, but the improvement effect is low, and the performance of other problems can be improved. It is not obvious, and it is impossible to efficiently reduce the leakage, wear and noise of the gear pump and improve its life.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提供一种液压齿轮泵,以解决上述背景技术中提出的问题。The purpose of the present invention is to provide a hydraulic gear pump to solve the above-mentioned problems in the background art.

为实现上述目的,本发明提供如下技术方案:包括主动齿轮轴、唇形密封圈、前端盖、前“8”型套、泵体、后“8”型套、后端盖、从动齿轮轴、定位销孔、泵出口、固定螺栓孔;所述前端盖与后端盖与泵体接触侧面开有贯穿的“8”型通槽,通槽内安装密封O型圈;所述前端盖安装在泵体左侧;所述前“8”型套安装在泵体内部左侧;所述主动齿轮轴穿过前端盖和前“8”型套安装在泵体内部,其齿轮段左侧面与前“8”型套右侧面接触;所述后“8”型套与主动齿轮轴齿轮段右侧接触,位于泵体内部右侧;所述从动齿轮轴贯穿前“8”型套和后“8”型套安装在泵体内部,其齿轮段与主动齿轮轴齿轮段啮合;所述后端盖安装在泵体右侧;所述唇形密封圈穿过主动齿轮轴的左侧轴段安装在前端盖左侧;所述泵出口安装在泵体上下侧面中央;所述定位销孔位于前端盖、后端盖分别与泵体连接处;所述固定螺栓孔贯穿前端盖、泵体、后端盖并用螺母固定。In order to achieve the above purpose, the present invention provides the following technical solutions: including a driving gear shaft, a lip seal, a front end cover, a front "8" type sleeve, a pump body, a rear "8" type sleeve, a rear end cover, and a driven gear shaft. , locating pin hole, pump outlet, fixing bolt hole; the front end cover and the rear end cover and the pump body are provided with an "8" type through groove through the contact side, and a sealing O-ring is installed in the through groove; the front end cover is installed On the left side of the pump body; the front "8" type sleeve is installed on the left side of the pump body; the driving gear shaft is installed inside the pump body through the front end cover and the front "8" type sleeve, and the left side of the gear section is Contact with the right side of the front "8" type sleeve; the rear "8" type sleeve is in contact with the right side of the gear section of the driving gear shaft, and is located on the right side inside the pump body; the driven gear shaft penetrates the front "8" type sleeve And the rear "8" type sleeve is installed inside the pump body, and its gear segment meshes with the gear segment of the driving gear shaft; the rear end cover is installed on the right side of the pump body; the lip seal passes through the left side of the driving gear shaft The shaft section is installed on the left side of the front end cover; the pump outlet is installed in the center of the upper and lower sides of the pump body; the positioning pin holes are located at the connection between the front end cover and the rear end cover and the pump body respectively; the fixing bolt holes penetrate through the front end cover and the pump body. body, rear end cover and fix with nuts.

作为本发明的一种优选技术方案,前“8”型套前接触面为与齿轮段接触面,后接触面为与泵体接触面;所述前“8”型套上开有一个通孔和一个盲孔,通孔内安装主动齿轮轴,盲孔内安装从动齿轮轴;其后接触面上有两个定位孔I、定位孔II和一个密封槽;前“8”型套上侧圆弧面开有引流圆弧槽I、引流圆弧槽II,在圆弧面之间的平面开孔II,与定位孔II连通;前“8”型套的下侧圆弧面上各开有一个孔I,分别与通孔和盲孔连通;在前接触面上通孔旁开圆弧槽I,并在内部开孔与引流圆弧槽II连通;在前接触面上盲孔旁开圆弧槽II,并在内部开孔与引流圆弧槽I连通;在盲孔内壁上靠近前接触面上开有圆弧槽III,并在内部开孔与引流圆弧槽II连通;在通孔内壁上靠近前接触面上开有圆弧槽IV,并在内部开孔与引流圆弧槽I连通。As a preferred technical solution of the present invention, the front contact surface of the front "8" type sleeve is the contact surface with the gear segment, and the rear contact surface is the contact surface with the pump body; a through hole is opened on the front "8" type sleeve and a blind hole, the drive gear shaft is installed in the through hole, and the driven gear shaft is installed in the blind hole; there are two positioning holes I, positioning holes II and a sealing groove on the rear contact surface; the upper side of the front "8" type sleeve The arc surface is provided with a drainage arc groove I and a drainage arc groove II, and the plane opening II between the arc surfaces is connected to the positioning hole II; the lower arc surface of the front "8" type sleeve is opened There is a hole I, which is connected with the through hole and the blind hole respectively; an arc groove I is opened beside the through hole on the front contact surface, and an inner hole is opened to communicate with the drainage arc groove II; the blind hole is opened on the front contact surface. The arc groove II is connected with the drainage arc groove I through the internal opening; the arc groove III is opened on the inner wall of the blind hole near the front contact surface, and the internal opening is communicated with the drainage arc groove II; A circular arc groove IV is opened on the inner wall of the hole near the front contact surface, and the inner opening is communicated with the drainage circular arc groove I.

作为本发明的一种优选技术方案,所述圆弧槽I的角度为40°,圆弧槽II的角度为80°,两圆弧槽的外径小于主动齿轮轴、从动齿轮轴齿轮段的齿根圆半径;所述圆弧槽III的角度为60°、圆弧槽IV的角度为90°。As a preferred technical solution of the present invention, the angle of the arc groove I is 40°, the angle of the arc groove II is 80°, and the outer diameters of the two arc grooves are smaller than the gear segments of the driving gear shaft and the driven gear shaft. The tooth root circle radius; the angle of the arc groove III is 60°, and the angle of the arc groove IV is 90°.

作为本发明的一种优选技术方案,后“8”型套与前“8”型套的区别是,在后接触面上密封槽I中央开有密封槽II,密封槽II为葫芦型槽,两个孔均为盲孔,圆弧槽I角度为80°、圆弧槽II角度为40°、圆弧槽III角度为90°、圆弧槽IV的角度为60°。As a preferred technical solution of the present invention, the difference between the rear "8" type sleeve and the front "8" type sleeve is that a sealing groove II is opened in the center of the sealing groove I on the rear contact surface, and the sealing groove II is a gourd-shaped groove, Both holes are blind holes, the angle of arc groove I is 80°, the angle of arc groove II is 40°, the angle of arc groove III is 90°, and the angle of arc groove IV is 60°.

作为本发明的一种优选技术方案,所述前“8”型套与后“8”型套分别安装在主动齿轮轴与从动齿轮轴的左右两侧,前“8”型套与后“8”型套左右对称安装。As a preferred technical solution of the present invention, the front "8" type sleeve and the rear "8" type sleeve are respectively installed on the left and right sides of the driving gear shaft and the driven gear shaft, and the front "8" type sleeve and the rear "8" type sleeve are respectively installed on the left and right sides of the driving gear shaft and the driven gear shaft. The 8" type sleeve is installed symmetrically on the left and right sides.

与现有技术相比,本发明的有益效果是:Compared with the prior art, the beneficial effects of the present invention are:

1.进行轴承径向力的动态补偿,转动轴之间形成油膜,避免出现两啮合轴的偏心发生,解决轴承与轴之间旋转时磨损,实现旋转轴的动压浮动状态;1. Carry out dynamic compensation of bearing radial force, form oil film between rotating shafts, avoid eccentricity of two meshing shafts, solve wear between bearings and shafts when rotating, and realize dynamic pressure floating state of rotating shaft;

2.对螺旋齿轮旋转啮合输送介质时产生的轴向力进行补偿,解决齿轮受轴向力发生轴向移动;2. Compensate for the axial force generated when the helical gear rotates and meshes the conveying medium, so as to solve the axial movement of the gear due to the axial force;

3.有效缓解由于齿轮接触端面高低压力差发生的倾斜;3. Effectively alleviate the inclination caused by the high and low pressure difference of the contact end face of the gear;

4.形成了一个由高压到中压再到低压的开环,引入动态高压油,保持恒定的动压力,带走高温油降低了液压齿轮泵的内部温度,起到润滑与降温的作用。解决以上问题可以有效做到降低液压齿轮泵的泄露、磨损与噪声,进而提升了液压齿轮泵的整体性能,也延长了工作寿命。4. An open loop is formed from high pressure to medium pressure to low pressure, dynamic high pressure oil is introduced to maintain a constant dynamic pressure, and the high temperature oil is taken away to reduce the internal temperature of the hydraulic gear pump, which plays the role of lubrication and cooling. Solving the above problems can effectively reduce the leakage, wear and noise of the hydraulic gear pump, thereby improving the overall performance of the hydraulic gear pump and prolonging the working life.

附图说明Description of drawings

图1为本发明立体示意图;Fig. 1 is the three-dimensional schematic diagram of the present invention;

图2为本发明剖视图;Fig. 2 is a sectional view of the present invention;

图3为本发明前“8”型套立体示意图I;Fig. 3 is the three-dimensional schematic diagram 1 of " 8 " type cover before the present invention;

图4为本发明前“8”型套立体示意图II;Fig. 4 is the stereo schematic diagram II of the former "8" type sleeve of the present invention;

图5为本发明前“8”型套立体示意图III;Fig. 5 is the three-dimensional schematic diagram III of the former "8" type sleeve of the present invention;

图6为本发明后“8”型套立体示意图I;Fig. 6 is after " 8 " type cover three-dimensional schematic diagram 1 of the present invention;

图中:主动齿轮轴1、唇形密封圈2、前端盖3、前“8”型套4、定位孔I401、定位孔II402、密封槽I403、孔I404、孔II405、引流圆弧槽I406、引流圆弧槽II407、圆弧槽I408、圆弧槽II409、圆弧槽III410、圆弧槽IV411、泵体5、后“8”型套6、密封槽II601后端盖7、从动齿轮轴8、定位销孔9、泵出口10、固定螺栓孔11。In the figure: driving gear shaft 1, lip seal 2, front cover 3, front "8" type sleeve 4, positioning hole I401, positioning hole II402, sealing groove I403, hole I404, hole II405, drainage arc groove I406, Drainage arc groove II407, arc groove I408, arc groove II409, arc groove III410, arc groove IV411, pump body 5, rear "8" type sleeve 6, sealing groove II601 rear end cover 7, driven gear shaft 8. Positioning pin hole 9, pump outlet 10, fixing bolt hole 11.

具体实施方式Detailed ways

实施例1Example 1

如图1至图6所示,本发明公开了一种液压齿轮泵,包括主动齿轮轴1、唇形密封圈2、前端盖3、前“8”型套4、泵体5、后“8”型套6、后端盖7、从动齿轮轴8、定位销孔9、泵出口10、固定螺栓孔11;所述前端盖3与后端盖7与泵体5接触侧面开有贯穿的“8”型通槽,通槽内安装密封O型圈;所述前端盖3安装在泵体5左侧;所述前“8”型套4安装在泵体5内部左侧;所述主动齿轮轴1穿过前端盖3和前“8”型套4安装在泵体1内部,其齿轮段左侧面与前“8”型套4右侧面接触;所述后“8”型套6与主动齿轮轴1齿轮段右侧接触,位于泵体5内部右侧;所述从动齿轮轴8贯穿前“8”型套4和后“8”型套6安装在泵体5内部,其齿轮段与主动齿轮轴1齿轮段啮合;所述后端盖7安装在泵体5右侧;所述唇形密封圈2穿过主动齿轮轴1的左侧轴段安装在前端盖3左侧;所述泵出口10安装在泵体5上下侧面中央;所述定位销孔9位于前端盖3、后端盖7分别与泵体5连接处;所述固定螺栓孔11贯穿前端盖3、泵体、后端盖7并用螺母固定。前“8”型套4前接触面为与齿轮段接触面,后接触面为与泵体5接触面;所述前“8”型套4上开有一个通孔和一个盲孔,通孔内安装主动齿轮轴1,盲孔内安装从动齿轮轴8;其后接触面上有两个定位孔I401、定位孔II402和一个密封槽I403;前“8”型套4上侧圆弧面开有引流圆弧槽I406、引流圆弧槽II407,在圆弧面之间的平面开孔II405,与定位孔II402连通;前“8”型套4的下侧圆弧面上各开有一个孔I404,分别与通孔和盲孔连通;在前接触面上通孔旁开圆弧槽I408,并在内部开孔与引流圆弧槽II407连通;在前接触面上盲孔旁开圆弧槽II409,并在内部开孔与引流圆弧槽I406连通;在盲孔内壁上靠近前接触面上开有圆弧槽III410,并在内部开孔与引流圆弧槽II407连通;在通孔内壁上靠近前接触面上开有圆弧槽IV411,并在内部开孔与引流圆弧槽I406连通。后“8”型套6与前“8”型套4的区别是,在后接触面上密封槽I403中央开有密封槽II601,密封槽II601为葫芦型槽。所述前“8”型套4与后“8”型套6分别安装在主动齿轮轴1与从动齿轮轴8的左右两侧,前“8”型套4与后“8”型套6左右对称安装。两组对称安装的前后“8”型套代替普通的轴承对主动齿轮轴以及从动齿轮轴进行支撑固定,并使高压区的液体从侧面槽和小孔引入“8”型套的内部圆弧槽与齿轮轴之间形成高压油膜,不但增加了润化、补偿径向力和减少与齿轮轴的磨损。所述圆弧槽I408的角度为40°,圆弧槽II409的角度为80°,两圆弧槽的外径小于主动齿轮轴1、从动齿轮轴8齿轮段的齿根圆半径;所述圆弧槽III410的角度为60°、圆弧槽IV411的角度为90°。形成了一个由高压到中压再到低压的开环,引入动态高压油,保持恒定的动压力,带走高温油降低了液压齿轮泵的内部温度,起到润滑与降温的作用。解决以上问题可以有效做到降低液压齿轮泵的泄露、磨损与噪声,进而提升了液压齿轮泵的整体性能,也延长了工作寿命。As shown in Figures 1 to 6, the present invention discloses a hydraulic gear pump, comprising a driving gear shaft 1, a lip seal 2, a front end cover 3, a front "8" type sleeve 4, a pump body 5, a rear "8" ” type sleeve 6, rear end cover 7, driven gear shaft 8, positioning pin hole 9, pump outlet 10, fixing bolt hole 11; The "8" type through groove is installed with a sealing O-ring; the front end cover 3 is installed on the left side of the pump body 5; the front "8" type sleeve 4 is installed on the left side of the pump body 5; the active The gear shaft 1 is installed inside the pump body 1 through the front end cover 3 and the front "8" type sleeve 4, and the left side of the gear segment is in contact with the right side of the front "8" type sleeve 4; the rear "8" type sleeve 4 6 is in contact with the right side of the gear segment of the driving gear shaft 1 and is located on the right side of the pump body 5; the driven gear shaft 8 is installed inside the pump body 5 through the front "8" type sleeve 4 and the rear "8" type sleeve 6, Its gear segment meshes with the gear segment of the driving gear shaft 1; the rear end cover 7 is installed on the right side of the pump body 5; the lip seal 2 passes through the left shaft segment of the driving gear shaft 1 and is installed on the left side of the front end cover 3. The pump outlet 10 is installed in the center of the upper and lower sides of the pump body 5; the positioning pin holes 9 are located at the connection between the front end cover 3 and the rear end cover 7 and the pump body 5 respectively; the fixing bolt holes 11 penetrate through the front end cover 3, The pump body and the rear end cover 7 are fixed with nuts. The front contact surface of the front "8" type sleeve 4 is the contact surface with the gear segment, and the rear contact surface is the contact surface with the pump body 5; the front "8" type sleeve 4 is provided with a through hole and a blind hole, and the through hole The driving gear shaft 1 is installed inside, and the driven gear shaft 8 is installed in the blind hole; there are two positioning holes I401, positioning holes II402 and one sealing groove I403 on the rear contact surface; the upper arc surface of the front "8" type sleeve 4 There are drainage arc groove I406 and drainage arc groove II407, and the plane opening II405 between the arc surfaces is connected with the positioning hole II402; the lower arc surface of the front "8" type sleeve 4 has one hole on each side. The hole I404 is connected with the through hole and the blind hole respectively; the arc slot I408 is opened beside the through hole on the front contact surface, and the inner hole is connected with the drainage arc slot II407; the arc slot is opened beside the blind hole on the front contact surface Slot II409, and the inner opening is communicated with the drainage arc groove I406; an arc slot III410 is opened on the inner wall of the blind hole near the front contact surface, and the inner opening is communicated with the drainage arc slot II407; the inner wall of the through hole A circular arc groove IV411 is opened on the upper surface close to the front contact surface, and an inner hole is opened to communicate with the drainage circular arc groove I406. The difference between the rear "8" type sleeve 6 and the front "8" type sleeve 4 is that there is a sealing groove II601 in the center of the sealing groove I403 on the rear contact surface, and the sealing groove II601 is a gourd-shaped groove. The front "8" type sleeve 4 and the rear "8" type sleeve 6 are respectively installed on the left and right sides of the driving gear shaft 1 and the driven gear shaft 8, the front "8" type sleeve 4 and the rear "8" type sleeve 6 Symmetrical installation. Two sets of symmetrically installed front and rear "8"-type sleeves replace ordinary bearings to support and fix the driving gear shaft and the driven gear shaft, and make the liquid in the high-pressure area enter the inner arc of the "8"-type sleeve from the side grooves and small holes A high-pressure oil film is formed between the groove and the gear shaft, which not only increases lubrication, compensates for radial force, and reduces wear on the gear shaft. The angle of the arc groove I408 is 40°, the angle of the arc groove II409 is 80°, and the outer diameters of the two arc grooves are smaller than the root circle radius of the gear segments of the driving gear shaft 1 and the driven gear shaft 8; the The angle of the arc groove III410 is 60°, and the angle of the arc groove IV411 is 90°. An open loop is formed from high pressure to medium pressure to low pressure, dynamic high pressure oil is introduced to maintain a constant dynamic pressure, and the high temperature oil is taken away to reduce the internal temperature of the hydraulic gear pump, which plays the role of lubrication and cooling. Solving the above problems can effectively reduce the leakage, wear and noise of the hydraulic gear pump, thereby improving the overall performance of the hydraulic gear pump and prolonging the working life.

本发明的工作原理如下:本发明安装时先将主动齿轮轴1、从动齿轮轴8的齿轮段啮合安装在泵体5内,并将前“8”型套4与后“8”型套6安装在齿轮段两侧并安装在泵体5内,然后依次在泵体5左右两侧安装前端盖3和后端盖7,并用螺栓固定对泵体完成密封,最后在前端盖3与主动齿轮轴1出口处安装唇形密封圈2完成主动齿轮轴的密封,完成对齿轮泵的安装。The working principle of the present invention is as follows: when the present invention is installed, the gear segments of the driving gear shaft 1 and the driven gear shaft 8 are meshed and installed in the pump body 5, and the front "8" type sleeve 4 and the rear "8" type sleeve are installed. 6 is installed on both sides of the gear section and installed in the pump body 5, then install the front end cover 3 and the rear end cover 7 on the left and right sides of the pump body 5 in turn, and use bolts to seal the pump body. The lip seal 2 is installed at the outlet of the gear shaft 1 to complete the sealing of the driving gear shaft and complete the installation of the gear pump.

本发明前“8”型套中,后接触端面高压油通过孔II405引入出口高压油进入定位孔II402,然后通过定位孔II402到达后接触表面,形成高压油膜。通过引流圆弧槽II407引入高压油,分别与对应孔内表面圆弧槽III410和前接触面圆弧槽I408连通,提供高压油,最后通过孔I404进入进油口。通过引流圆弧槽I406引入高压油,分别与对应孔内表面圆弧槽IV411和前接触面圆弧槽II409连通,提供高压油,最后通过孔I404进入进油口。In the front "8" type sleeve of the present invention, the high pressure oil on the rear contact end face is introduced into the outlet high pressure oil through the hole II405 and enters the positioning hole II402, and then reaches the rear contact surface through the positioning hole II402 to form a high pressure oil film. The high-pressure oil is introduced through the drainage arc groove II407, and communicates with the arc groove III410 on the inner surface of the corresponding hole and the arc groove I408 on the front contact surface, providing high-pressure oil, and finally enters the oil inlet through the hole I404. The high-pressure oil is introduced through the drainage arc groove I406, and communicates with the arc groove IV411 on the inner surface of the corresponding hole and the arc groove II409 on the front contact surface, providing high-pressure oil, and finally enters the oil inlet through the hole I404.

从“8”型套前接触面圆弧槽引入高压油,不但可以抵消一部分轴向力还可以使齿轮轴轴向浮动减小摩损;“8”型套后接触面引入高压油,根据高压油接触面积大小,解决不同齿轮轴产生的轴向力;前后“8”型套后接触面外侧密封有效隔离不同压力区间的油,减小泄露;后“8”型套后接触面内侧密封槽防止高压油的泄露同时使两盲孔后接触面产生不同大小的高压油接触面,主动齿轮轴1对应后“8”型套后接触面面积大于从动齿轮轴8对应后“8”型套后接触面面积,为了补偿主动齿轮轴1所受轴向力;通过从“8”型套上的孔和槽形成动压悬浮,有效解决了齿轮轴径向力和轴向力的平衡问题,减少对“8”型套的磨损,使液压齿轮泵整体噪音减小,可以适应更高的转速,提高了齿轮泵整体的寿命。The introduction of high-pressure oil from the arc groove on the front contact surface of the "8" type sleeve can not only offset a part of the axial force, but also make the gear shaft float axially to reduce wear; The size of the oil contact area can solve the axial force generated by different gear shafts; the outer seal of the rear contact surface of the front and rear "8" type sleeves effectively isolates oil in different pressure ranges and reduces leakage; the inner sealing groove of the rear contact surface of the rear "8" type sleeve Prevent the leakage of high-pressure oil and at the same time make the rear contact surfaces of the two blind holes produce high-pressure oil contact surfaces of different sizes. The rear contact surface area corresponding to the rear "8" type sleeve of the driving gear shaft 1 is larger than that of the driven gear shaft 8 corresponding to the rear "8" type sleeve. The rear contact surface area, in order to compensate the axial force on the drive gear shaft 1; the dynamic pressure suspension is formed from the holes and grooves on the "8" type sleeve, which effectively solves the problem of balance between the radial force and the axial force of the gear shaft. Reduce the wear on the "8" type sleeve, reduce the overall noise of the hydraulic gear pump, adapt to higher rotational speeds, and improve the overall life of the gear pump.

前“8”型套4后端面主要引入高压油对轴向力进行补偿,主动齿轮轴1和从动齿轮轴8轴向力刚好相反,由于主动齿轮轴与前“8”型套通孔配合,如果轴向力指向前“8”型套,轴向力不容易补偿,本发明确定主动齿轮轴1的旋向转动方向,使从动齿轮轴8受到的轴向力指向前“8”型套,主动齿轮轴1受到指向后“8”型套,为了能有效对轴向力进行补偿,后端面通过孔II405和定位孔II402引入高压油,盲孔后接触面面积大于通孔后接触面面积,形成的高压区可以补偿从动齿轮轴8所受轴向力;在补偿轴向力时为了避免出现前“8”型套前接触面与齿轮轴端面接触磨损,在前接触面圆弧槽I408、圆弧槽II409分别与侧面引流圆弧槽I406、引流圆弧槽II407连通,引流圆弧槽I406与高压区连接,引入高压油接触面形成高压浮动空间;由于主动齿轮轴1的轴向力指向后“8”型套6,从动齿轮轴8收到的轴向力指向前“8”型套4,两接触面受力不同,所以在从动齿轮轴8接触面的圆弧槽II409角度为80°,在主动齿轮轴接触面圆弧槽I408角度为40°,两圆弧槽的外径小于齿轮齿根圆半径避免连通泄露;前“8”型套4与主动齿轮轴1连接的通孔内表面开圆弧槽III410,连通引流圆弧槽II407;与从动齿轮轴连接的盲孔内表面开圆弧槽IV411,连通引流圆弧槽I406;引入高压油,与连接的轴段形成油膜,不但使得旋转的轴浮动起来,避免接触的机械磨损,而且由于槽形成的静压力补偿齿轮轴所受的径向力,因为从动齿轮轴所受径向力比主动齿轮轴大,所以圆弧槽IV411角度为60°,圆弧槽III410角度为90°,两圆弧槽位置靠近出油口一侧内表面,轴孔的油通过力的补偿与润滑,压力减小,温度升高,通过孔I404引入低压区,形成了一个开环油路,形成了一个开环油路,引入的动态高压油,保持恒定的动压力,并带走高温油降低了液压齿轮泵的内部温度。后“8”型套6的原理与前“8”型套4相同,故不在详细描述。The rear face of the front "8" type sleeve 4 mainly introduces high pressure oil to compensate the axial force. The axial force of the driving gear shaft 1 and the driven gear shaft 8 is just opposite, because the driving gear shaft and the front "8" type sleeve through hole are matched , If the axial force points to the front "8" type sleeve, the axial force is not easy to compensate, the present invention determines the rotation direction of the driving gear shaft 1, so that the axial force received by the driven gear shaft 8 points to the front "8" type Sleeve, the driving gear shaft 1 is subjected to the rearward "8" type sleeve. In order to effectively compensate the axial force, the rear end face introduces high pressure oil through hole II405 and positioning hole II402, and the contact surface area behind the blind hole is larger than that of the through hole. The high pressure area formed can compensate the axial force on the driven gear shaft 8; when compensating for the axial force, in order to avoid the contact wear between the front contact surface of the front "8" type sleeve and the end surface of the gear shaft, the arc on the front contact surface The groove I408 and the arc groove II409 are respectively connected with the side drainage arc groove I406 and the drainage arc groove II407. The drainage arc groove I406 is connected with the high pressure area, and the high pressure oil contact surface is introduced to form a high pressure floating space; The force is directed to the rear "8" type sleeve 6, the axial force received by the driven gear shaft 8 is directed to the front "8" type sleeve 4, and the two contact surfaces are subjected to different forces, so the arc on the contact surface of the driven gear shaft 8 The angle of the groove II409 is 80°, the angle of the arc groove I408 on the contact surface of the driving gear shaft is 40°, the outer diameter of the two arc grooves is smaller than the radius of the gear root circle to avoid communication leakage; the front "8" type sleeve 4 is connected to the driving gear shaft. 1. A circular arc groove III410 is opened on the inner surface of the connected through hole, which is connected to the drainage arc groove II407; the inner surface of the blind hole connected with the driven gear shaft is opened with an arc groove IV411, which is connected to the drainage arc groove I406; The shaft segment forms an oil film, which not only floats the rotating shaft and avoids the mechanical wear of contact, but also compensates the radial force on the gear shaft due to the static pressure formed by the groove, because the radial force on the driven gear shaft is higher than that on the driving gear. The shaft is large, so the angle of arc groove IV411 is 60°, and the angle of arc groove III410 is 90°. The positions of the two arc grooves are close to the inner surface of one side of the oil outlet. The oil in the shaft hole is compensated and lubricated by force, and the pressure is reduced. , the temperature rises, and the low pressure area is introduced through the hole I404, forming an open-loop oil circuit, forming an open-loop oil circuit, the dynamic high-pressure oil introduced, maintains a constant dynamic pressure, and takes away the high-temperature oil to reduce the hydraulic gear pump. the internal temperature. The principle of the rear "8" type sleeve 6 is the same as that of the front "8" type sleeve 4, so it will not be described in detail.

在本发明的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描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、以特定的方位构造和操作,因此不能理解为对本发明的限制,此外,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量,由此,限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征,在本发明的描述中,除非另有说明,“多个”的含义是两个或两个以上。In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and Simplifies the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the present invention, in addition, the terms "first", "second", etc. It is only for the purpose of description, and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated, thus, the features defined with "first", "second", etc. can be expressed or implied. including one or more of the features, in the description of the present invention, unless otherwise stated, "a plurality" means two or more.

在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通,对于本领域的普通技术人员而言,可以通过具体情况理解上述术语在本发明中的具体含义In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components, for those of ordinary skill in the art, The specific meanings of the above terms in the present invention can be understood through specific situations

上述虽然对本发明的具体实施例作了详细说明,但是本发明并不限于上述实施例,在本领域普通技术人员所具备的知识范围内,还可以在不脱离本发明宗旨的前提下做出各种变化,而不具备创造性劳动的修改或变形仍在本发明的保护范围以内。Although the specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, various Such changes, modifications or deformations without creative work are still within the protection scope of the present invention.

Claims (5)

1. A hydraulic gear pump, its characterized in that: the pump comprises a driving gear shaft (1), a lip-shaped sealing ring (2), a front end cover (3), a front 8-shaped sleeve (4), a pump body (5), a rear 8-shaped sleeve (6), a rear end cover (7), a driven gear shaft (8), a positioning pin hole (9), a pump outlet (10) and a fixing bolt hole (11); the side surfaces of the front end cover (3) and the rear end cover (7) which are in contact with the pump body (5) are provided with through 8-shaped through grooves, and sealing O-shaped rings are arranged in the through grooves; the front end cover (3) is arranged on the left side of the pump body (5); the front 8-shaped sleeve (4) is arranged on the left side inside the pump body (5); the driving gear shaft (1) penetrates through the front end cover (3) and the front 8-shaped sleeve (4) and is installed in the pump body (1), and the left side surface of a gear section of the driving gear shaft is in contact with the right side surface of the front 8-shaped sleeve (4); the rear 8-shaped sleeve (6) is in contact with the right side of the gear section of the driving gear shaft (1) and is positioned on the right side inside the pump body (5); the driven gear shaft (8) penetrates through the front 8-shaped sleeve (4) and the rear 8-shaped sleeve (6) and is arranged in the pump body (5), and the gear section of the driven gear shaft is meshed with the gear section of the driving gear shaft (1); the rear end cover (7) is arranged on the right side of the pump body (5); the lip-shaped sealing ring (2) penetrates through the left shaft section of the driving gear shaft (1) and is installed on the left side of the front end cover (3); the pump outlet (10) is arranged in the center of the upper side surface and the lower side surface of the pump body (5); the positioning pin hole (9) is positioned at the joint of the front end cover (3) and the rear end cover (7) and the pump body (5) respectively; the fixing bolt hole (11) penetrates through the front end cover (3), the pump body and the rear end cover (7) and is fixed by a nut.
2. A hydraulic gear pump according to claim 1, characterized in that: the front contact surface of the front 8-shaped sleeve (4) is the contact surface with the gear section, and the rear contact surface is the contact surface with the pump body (5); a through hole and a blind hole are formed in the front 8-shaped sleeve (4), a driving gear shaft (1) is installed in the through hole, and a driven gear shaft (8) is installed in the blind hole; the rear contact surface is provided with two positioning holes I (401), two positioning holes II (402) and a sealing groove I (403); the arc surface on the upper side of the front 8-shaped sleeve (4) is provided with a drainage arc groove I (406) and a drainage arc groove II (407), and a plane opening II (405) between the arc surfaces is communicated with a positioning hole II (402); the arc surface of the lower side of the front 8-shaped sleeve (4) is respectively provided with a hole I (404) which is respectively communicated with the through hole and the blind hole; an arc groove I (408) is formed beside the through hole on the front contact surface, and an opening is formed in the front contact surface and communicated with a drainage arc groove II (407); an arc groove II (409) is formed beside the blind hole on the front contact surface, and an inner opening is communicated with the drainage arc groove I (406); an arc groove III (410) is formed in the inner wall of the blind hole close to the front contact surface, and an opening is formed in the inner wall of the blind hole and communicated with a drainage arc groove II (407); an arc groove IV (411) is formed in the inner wall of the through hole close to the front contact surface, and the inner opening is communicated with the drainage arc groove I (406).
3. A hydraulic gear pump according to claim 2, characterized in that: the angle of the arc groove I (408) is 40 degrees, the angle of the arc groove II (409) is 80 degrees, and the outer diameters of the two arc grooves are smaller than the root circle radiuses of the gear sections of the driving gear shaft (1) and the driven gear shaft (8); the angle of the arc groove III (410) is 60 degrees, and the angle of the arc groove IV (411) is 90 degrees.
4. A hydraulic gear pump according to claim 3, characterized in that: the difference between the rear 8-shaped sleeve (6) and the front 8-shaped sleeve (4) is that a sealing groove II (601) is formed in the center of a sealing groove I (403) on the rear contact surface, the sealing groove II (601) is a gourd-shaped groove, two holes are blind holes, the angle of the arc groove I (408) is 80 degrees, the angle of the arc groove II (409) is 40 degrees, the angle of the arc groove III (410) is 90 degrees, and the angle of the arc groove IV (411) is 60 degrees.
5. A hydraulic gear pump according to claim 4, characterized in that: the front 8-shaped sleeve (4) and the rear 8-shaped sleeve (6) are respectively arranged on the left side and the right side of the driving gear shaft (1) and the driven gear shaft (8), and the front 8-shaped sleeve (4) and the rear 8-shaped sleeve (6) are symmetrically arranged on the left side and the right side.
CN202210962012.7A 2022-08-11 2022-08-11 A hydraulic gear pump Pending CN115163483A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117267125A (en) * 2023-09-20 2023-12-22 山东世精液压设备有限公司 Double-stage high-pressure gear hydraulic pump
CN117703746A (en) * 2024-01-16 2024-03-15 南京孚奥智能技术有限公司 Internal gear pump

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CN104533786A (en) * 2014-12-26 2015-04-22 徐州科源液压股份有限公司 Gear pump adopting new structure shaft sleeves
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CN108799101A (en) * 2018-06-15 2018-11-13 哈尔滨理工大学 A kind of novel floating buss of external gear rotary pump
CN109322821A (en) * 2018-10-09 2019-02-12 宿迁学院 A combined structure for eliminating radial force of gear pump
CN111852855A (en) * 2020-08-06 2020-10-30 南通铁人运动用品有限公司 Bidirectional internal circulation automatic compensation hydraulic gear oil pump system for fitness equipment
CN212985524U (en) * 2020-07-29 2021-04-16 潍柴动力股份有限公司 Side plate structure and gear pump
CN113931838A (en) * 2021-09-22 2022-01-14 江苏金陵智造研究院有限公司 Radial static pressure balance floating type gear pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2547912Y (en) * 2002-06-25 2003-04-30 程安强 Hydraulic gear pump with axial sealing compensation device
CN102348897A (en) * 2009-03-12 2012-02-08 罗伯特·博世有限公司 Hydraulic toothed wheel machine
CN102927002A (en) * 2012-12-04 2013-02-13 泸州众大科技液压件有限公司 High-pressure gear pump
DE102013202917A1 (en) * 2013-02-22 2014-08-28 Robert Bosch Gmbh Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove
CN104533786A (en) * 2014-12-26 2015-04-22 徐州科源液压股份有限公司 Gear pump adopting new structure shaft sleeves
CN106762612A (en) * 2017-01-10 2017-05-31 黄山工业泵制造有限公司 A kind of high-pressure spiral gear pump with gapless external toothing tooth form
CN108799101A (en) * 2018-06-15 2018-11-13 哈尔滨理工大学 A kind of novel floating buss of external gear rotary pump
CN109322821A (en) * 2018-10-09 2019-02-12 宿迁学院 A combined structure for eliminating radial force of gear pump
CN212985524U (en) * 2020-07-29 2021-04-16 潍柴动力股份有限公司 Side plate structure and gear pump
CN111852855A (en) * 2020-08-06 2020-10-30 南通铁人运动用品有限公司 Bidirectional internal circulation automatic compensation hydraulic gear oil pump system for fitness equipment
CN113931838A (en) * 2021-09-22 2022-01-14 江苏金陵智造研究院有限公司 Radial static pressure balance floating type gear pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117267125A (en) * 2023-09-20 2023-12-22 山东世精液压设备有限公司 Double-stage high-pressure gear hydraulic pump
CN117703746A (en) * 2024-01-16 2024-03-15 南京孚奥智能技术有限公司 Internal gear pump
CN117703746B (en) * 2024-01-16 2024-08-09 南京孚奥智能技术有限公司 Internal gear pump

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