KR20070111044A - A durability test device of oil pump - Google Patents

A durability test device of oil pump Download PDF

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KR20070111044A
KR20070111044A KR1020060043879A KR20060043879A KR20070111044A KR 20070111044 A KR20070111044 A KR 20070111044A KR 1020060043879 A KR1020060043879 A KR 1020060043879A KR 20060043879 A KR20060043879 A KR 20060043879A KR 20070111044 A KR20070111044 A KR 20070111044A
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pump
gear
oil pump
mounting bracket
oil
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KR1020060043879A
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Korean (ko)
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KR100783511B1 (en
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하창훈
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현대자동차주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0025—Measuring of vehicle parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0078—Testing material properties on manufactured objects
    • G01N33/0083—Vehicle parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0032—Generation of the force using mechanical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture

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  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Rotary Pumps (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

A durability test device of an oil pump is provided to test in a condition more similar to the actual condition using a bearing, thereby improving reliability of the durability test. A durability test device of an oil pump includes a driving gear mounted on a rotary shaft(21) of a driving rotor(13), and a crank gear(25) rotated by rotary power of a driving motor(1). Further, the durability test device includes a pump gear(31) installed on a rotary shaft(27) at one side of a pump housing(9) with a bearing(29) interposed therebetween. The pump gear is engaged with the crank gear and the driving gear to transmit power. An eccentric weight is installed on one side of the pump gear, which realizes a stringent condition by eccentric load.

Description

오일펌프용 내구시험장치{A durability test device of oil pump}A durability test device of oil pump

도 1은 본 발명의 실시예에 따른 오일펌프 내구시험의 기본 개념도이다. 1 is a basic conceptual diagram of an oil pump endurance test according to an embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 오일펌프용 내구시험장치의 구성도이다. 2 is a block diagram of an oil pump durability test apparatus according to an embodiment of the present invention.

도 3은 도 2의 A-A 선에 따른 단면도이다. 3 is a cross-sectional view taken along the line A-A of FIG.

본 발명은 오일펌프용 내구시험장치에 관한 것으로서, 보다 상세하게는 오일펌프를 구동하기 위한 각 기어류에 편심하중 및 기어간 접촉력 등의 가혹조건을 구현하여 베어링의 실제 사용 조건에 보다 가깝게 시험하여 신뢰성 있는 시험결과를 도출하기 위한 오일펌프용 내구시험장치에 관한 것이다. The present invention relates to an endurance test apparatus for an oil pump, and more specifically, to implement a harsh condition such as an eccentric load and contact force between gears for driving an oil pump to test closer to actual use conditions of a bearing. The present invention relates to an endurance test apparatus for an oil pump for producing reliable test results.

일반적으로 차량용 오일펌프는 고속으로 회전하는 엔진의 각 마찰요소에 윤활오일을 공급하는 펌프로서, 엔진의 구동력을 이용하여 메인 갤러리로부터 오일필터와 오일쿨러를 통하여 윤활오일을 흡입하여 엔진의 각 마찰요소의 마모를 방지하도록 윤활오일을 공급하게 된다. In general, an oil pump for a vehicle is a pump for supplying lubrication oil to each friction element of an engine rotating at high speed. Lubricant oil is supplied to prevent wear.

최근에는 엔진 출력 증대에 따른 윤활계 오일소요 용량의 증대로 인하여 오일펌프의 토출 유량도 증대하여 소요량에 대응하였으나, 오일펌프 자체의 과부하로 인한 구동부 파손 등 내구성 문제가 지적되고 있다. Recently, the discharge flow rate of the oil pump is also increased due to the increase in the lubricating oil required capacity according to the increase in the engine output, but the durability has been pointed out, such as damage to the driving part due to the overload of the oil pump itself.

그러나 오일펌프의 내구성을 확인하기 위한 엔진에서의 내구시험은 시간 및 비용이 과다하게 소요되는 문제점이 있다.However, the durability test in the engine to check the durability of the oil pump has a problem that takes excessive time and cost.

따라서 엔진 외 리그상에서 내구력을 검증할 수 있는 시험법을 개발하여 시험표준에 적용하고 있는데, 리그시험의 경우에는 축을 회전시키는 상태에서 고정된 베어링 부쉬에 유압을 이용한 가압장치를 통하여 부하를 가하여 오일펌프 장착용 부쉬의 재질 혹은 부품의 내구성을 확인하기 위한 것으로, 부쉬의 재질간 내마모성 상대평가에 주로 이용되는 정도로, 베어링이 회전하는 실제 사용 조건을 반영하지는 못하는 단점을 내포하고 있다.Therefore, we developed a test method to verify the durability on the rig other than the engine and applies it to the test standard.In the case of the rig test, an oil pump is applied to a fixed bearing bush with a hydraulic pressurizing device while the shaft is rotated. It is to check the durability of the material or parts of the mounting bush, and it is used mainly for the relative evaluation of wear resistance between the materials of the bushing, and it does not reflect the actual operating conditions in which the bearing rotates.

따라서, 본 발명은 상기와 같은 단점을 극복하기 위하여 창출된 것으로서, 본 발명의 목적은 오일펌프를 구동하기 위한 각 기어류에 편심하중 및 기어간 접촉력 등의 가혹조건을 구현하여 베어링의 실제 사용 조건에 보다 가깝게 시험하여 신뢰성 있는 시험결과를 도출하기 위한 오일펌프용 내구시험장치를 제공하는 것이다.Therefore, the present invention was created to overcome the above disadvantages, and an object of the present invention is to implement the harsh conditions such as eccentric load and contact force between the gears for driving the oil pump in actual use conditions of the bearings. It is to provide endurance test apparatus for oil pump to make test results closer to the test.

상기한 목적을 실현하기 위하여 본 발명에 따른 오일펌프용 내구시험장치는 펌프 하우징과 펌프 커버로 이루어진 펌프실 내에 상호 치합된 구동 및 종동 로터의 회전에 의해 흡입구로부터 오일을 흡입하여 토출구를 통하여 배출하도록 이루어지는 오일펌프에 대하여 내구시험을 이루기 위한 오일펌프용 내구시험장치에 있어서, Oil pump durability test apparatus according to the present invention to achieve the above object is made to suck the oil from the inlet by the rotation of the drive and driven rotor mutually engaged in the pump chamber consisting of the pump housing and the pump cover to discharge through the discharge port. In the endurance test apparatus for oil pump for endurance test for the oil pump,

상기 구동로터의 회전축에 장착되는 구동기어; 구동모터의 회전력을 이용하여 회전 구동하는 크랭크 기어; 상기 펌프 하우징의 일측에 회전축을 구성하여 베어링을 개재한 상태로 상기 회전축에 회전 가능하게 설치되며, 상기 크랭크 기어 및 상기 구동기어에 각각 치합되는 펌프기어; 상기 펌프기어의 일측에 설치되어 베어링 내구시험의 편심하중에 의한 가혹조건을 구현하는 편심하중체; 상기 펌프 하우징의 양측단을 고정하는 마운팅 브라켓; 상기 마운팅 브라켓의 일측방의 고정체에 구성되어 마운팅 브라켓의 일측에 대하여 가압력을 조정하여 상기 펌프 하우징을 이동시킴으로써 상기 크랭크 기어 및 구동기어에 대한 펌프기어의 기어간 접촉력을 증감할 수 있도록 하는 접촉력 조절수단을 포함하는 것을 특징으로 한다.A drive gear mounted to a rotation shaft of the drive rotor; A crank gear for rotationally driving by using the rotational force of the drive motor; A pump gear constituting a rotation shaft on one side of the pump housing so as to be rotatably installed on the rotation shaft with a bearing interposed therebetween and engaged with the crank gear and the drive gear, respectively; An eccentric load body installed at one side of the pump gear to implement harsh conditions by an eccentric load of a bearing endurance test; A mounting bracket for fixing both ends of the pump housing; The contact force adjustment is configured to be fixed to one side of the mounting bracket to move the pump housing by adjusting the pressing force with respect to one side of the mounting bracket so that the contact force between the gears of the pump gear against the crank gear and the driving gear can be increased or decreased. It comprises a means.

상기 편심하중체는 볼트와 이에 체결되는 너트로 이루어지는 것을 특징으로 한다.The eccentric load body is characterized by consisting of a bolt and a nut fastened thereto.

상기 접촉력 조절수단은 상기 고정체를 관통하여 체결되어 그 선단이 상기 마운팅 브라켓의 일측단부에 접촉되며, 타단에는 회전 손잡이가 형성되는 스크류 봉으로 이루어지는 것을 특징으로 한다.The contact force adjusting means is fastened through the fixing body, the front end of which is in contact with one end of the mounting bracket, and the other end is characterized by consisting of a screw rod formed with a rotary knob.

이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 보다 상세히 설명한다.BEST MODE Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 오일펌프 내구시험의 기본 개념도이고, 도 2는 본 발명의 실시예에 따른 오일펌프용 내구시험장치의 구성도이다. 1 is a basic conceptual diagram of an oil pump endurance test according to an embodiment of the present invention, Figure 2 is a configuration diagram of an oil pump endurance test apparatus according to an embodiment of the present invention.

일반적으로 오일펌프용 내구시험은, 도 1에서 도시한 바와 같이, 구동모터(1)의 회전력을 토크미터 기어박스(3)를 통하여 원하는 토크로 측정하여 안정적 인 감속 혹은 증속 회전력을 얻어 오일탱크(5) 내부에 구성되는 상기 오일펌프(7)에 회전력을 제공하여 구동시키게 된다. In general, the oil pump endurance test, as shown in Figure 1, by measuring the rotational force of the drive motor 1 to the desired torque through the torque meter gearbox (3) to obtain a stable deceleration or increased rotational force to obtain an oil tank ( 5) it is driven by providing a rotational force to the oil pump (7) configured therein.

이와 같이, 오일펌프(7)를 구동시키는 상태로, 시험 가혹도를 구현하게 되는데, 보통은 운전시간을 일정시간 이상으로 하고, 운전속도는 약 2400RPM으로 설정하며, 토출압력은 시일링의 한계치까지 올리는 등으로 시험이 진행된다. In this way, in the state of driving the oil pump (7), the test severity is implemented, usually the operating time is a certain time or more, the operating speed is set to about 2400 RPM, the discharge pressure to the limit of the sealing The test proceeds by raising.

이외에, 본 발명에서는 베어링의 내구성을 시험하는 구성이 추가되는데, 먼저, 본 발명이 적용되는 오일펌프(7)의 구성을 도 2와 도 3을 통하여 설명하면, 상기 오일펌프(7)는 펌프 하우징(9)과 펌프 커버(11)로 이루어진 펌프실 내에 상호 치합된 구동 및 종동 로터(13,15)의 회전에 의해 흡입구(17)로부터 오일을 흡입하여 토출구(19)를 통하여 배출하도록 구성된다. In addition, in the present invention, a configuration for testing the durability of the bearing is added. First, the configuration of the oil pump 7 to which the present invention is applied will be described with reference to FIGS. 2 and 3, and the oil pump 7 includes a pump housing. It is configured to suck oil from the inlet port 17 and discharge it through the outlet port 19 by the rotation of the driven and driven rotors 13 and 15 engaged with each other in the pump chamber consisting of the pump cover 11 and the pump 9.

이러한 구성의 오일펌프(7)에 대하여 내구시험을 이루기 위한 본 발명의 오일펌프용 내구시험장치는 상기 구동로터(13)의 회전축(21)에 구동기어(23)가 장착된다. The oil pump endurance test apparatus of the present invention for endurance test for the oil pump 7 of this configuration is equipped with a drive gear 23 on the rotating shaft 21 of the drive rotor (13).

그리고 구동모터(1)의 회전력을 이용하여 회전 구동하는 크랭크 기어(25)가 구비된다. And a crank gear 25 for rotationally driving by using the rotational force of the drive motor 1 is provided.

또한, 상기 펌프 하우징(9)의 일측에는 회전축(27)을 구성하여 베어링(29)을 개재한 상태로 상기 회전축(27)에 회전 가능하게 펌프기어(31)가 설치되며, 이 펌프기어(31)는 상기 크랭크 기어(25) 및 상기 구동기어(23)에 각각 치합되어 동력을 전달하게 된다. In addition, the pump gear 31 is rotatably installed on one side of the pump housing 9 so as to be rotatable on the rotating shaft 27 with the bearing 29 interposed therebetween. ) Is coupled to the crank gear 25 and the drive gear 23, respectively, to transmit power.

그리고 상기 펌프기어의 일측에는 편심하중체(33)가 설치되어 베어링 내구시 험의 편심하중에 의한 가혹조건을 구현하게 된다.In addition, an eccentric load body 33 is installed at one side of the pump gear to implement a harsh condition due to the eccentric load of the bearing endurance test.

여기서, 상기 편심하중체(33)는 볼트와 이에 체결되는 너트로 이루어지는 것이 바람직하며, 회전중심으로부터 임의의 편심거리(L)만큼 떨어진 위치에 설치되는 것이 바람직하다.Here, the eccentric load 33 is preferably composed of a bolt and a nut fastened thereto, and is preferably installed at a position separated by an arbitrary eccentric distance L from the rotation center.

또한, 상기 펌프 하우징(9)은 마운팅 브라켓(35)에 의해 그 양측단이 고정되며, 상기 마운팅 브라켓(35)의 일측방의 고정체(37)에는 상기 마운팅 브라켓(35)의 일측에 대하여 가압력을 조정하여 상기 펌프 하우징(9)을 이동시킴으로써 상기 크랭크 기어(25) 및 구동기어(23)에 대한 펌프기어(31)의 기어간 접촉력을 증감할 수 있도록 하는 접촉력 조절수단(39)이 구성된다. In addition, both ends of the pump housing 9 are fixed by a mounting bracket 35, and a pressing force against one side of the mounting bracket 35 is fixed to the fixing body 37 on one side of the mounting bracket 35. Is adjusted to move the pump housing 9 to adjust the contact force between the gears of the pump gear 31 against the crank gear 25 and the drive gear 23, the contact force adjusting means 39 is configured. .

상기 접촉력 조절수단(39)은 상기 고정체(37)를 관통하여 체결되어 그 선단이 상기 마운팅 브라켓(35)의 일측 단부에 접촉되며, 타단에는 회전 손잡이(43)가 형성되는 스크류 봉(41)으로 이루어진다.The contact force adjusting means 39 is fastened through the fixing body 37 so that its front end is in contact with one end of the mounting bracket 35, and the other end of the screw rod 41 is formed with a rotary knob 43. Is done.

따라서, 상기한 바와 같은 구성을 갖는 오일펌프용 내구시험장치에 의하면, 상기한 오일펌프(7)를 구동하기 위한 각 기어류에 편심하중 및 기어간 접촉력 가변등의 가혹조건을 구현하여 베어링(29)의 실제 사용 조건에 보다 가깝게 시험하여 신뢰성 있는 시험결과를 도출하게 된다. Therefore, according to the endurance test apparatus for an oil pump having the configuration as described above, to implement the harsh conditions such as eccentric load and variable contact force between the gears for driving the oil pump (7) to implement the bearing (29) Test closer to the actual conditions of use will yield reliable test results.

즉, 편심하중의 경우, 베어링 부쉬의 마모를 가속화하기 위해 회전하는 기어에 편심하중을 가하되, 중량물 회전체의 기준허용치 대비 2배, 실질 가중치의 20배를 가하는 등의 가혹조건을 구현할 수 있게 된다. In other words, in the case of eccentric load, the eccentric load is applied to the rotating gear to accelerate the wear of the bearing bush, and it is possible to realize the harsh conditions such as applying twice the actual allowance and 20 times the actual weight of the heavy rotor. do.

그리고 기어간 접촉력은 상기 스크류 봉(41)을 이용하여 펌프 하우징(9)의 위치를 이동시켜 특히, 크랭크 기어(25)와 펌프기어(31)간 간극(백래쉬)을 조절하여 베어링 부쉬에 작용하는 하중량을 조정하여 윤활 습동부의 윤활 조건을 가혹하게 하여 마모를 촉진하는 등의 가혹조건을 구현하게 된다. In addition, the contact force between the gears is moved to the position of the pump housing 9 by using the screw rod 41, in particular, to control the gap (backlash) between the crank gear 25 and the pump gear 31 acting on the bearing bush By adjusting the lower weight, the lubricating condition of the lubricating sliding part is severed to realize harsh conditions such as promoting wear.

상술한 바와 같은 본 발명에 따른 오일펌프용 내구시험장치에 의하면, 오일펌프를 구동하기 위한 각 기어류에 편심하중 및 기어간 접촉력 가변등의 가혹조건을 간단하게 구현하여 베어링의 실제 사용 조건에 보다 가깝게 시험할 수 있도록 함으로써, 신뢰성 있는 내구시험결과를 도출하는 효과가 있다. According to the endurance test apparatus for oil pump according to the present invention as described above, to implement the harsh conditions such as eccentric load and variable contact force between gears for driving the oil pump more easily than the actual use conditions of the bearing By making the test closer, it has the effect of producing reliable endurance test results.

Claims (3)

펌프 하우징과 펌프 커버로 이루어진 펌프실 내에 상호 치합된 구동 및 종동 로터의 회전에 의해 흡입구로부터 오일을 흡입하여 토출구를 통하여 배출하도록 이루어지는 오일펌프에 대하여 내구시험을 이루기 위한 오일펌프용 내구시험장치에 있어서, In the endurance test apparatus for an oil pump for performing an endurance test for an oil pump which is configured to suck oil from the inlet port and discharge it through the outlet port by the rotation of the driving and driven rotors engaged with each other in the pump chamber consisting of the pump housing and the pump cover, 상기 구동로터의 회전축에 장착되는 구동기어;A drive gear mounted to a rotation shaft of the drive rotor; 구동모터의 회전력을 이용하여 회전 구동하는 크랭크 기어;A crank gear for rotationally driving by using the rotational force of the drive motor; 상기 펌프 하우징의 일측에 회전축을 구성하여 베어링을 개재한 상태로 상기 회전축에 회전 가능하게 설치되며, 상기 크랭크 기어 및 상기 구동기어에 각각 치합되는 펌프기어;A pump gear constituting a rotation shaft on one side of the pump housing so as to be rotatably installed on the rotation shaft with a bearing interposed therebetween and engaged with the crank gear and the drive gear, respectively; 상기 펌프기어의 일측에 설치되어 베어링 내구시험의 편심하중에 의한 가혹조건을 구현하는 편심하중체;An eccentric load body installed at one side of the pump gear to implement harsh conditions by an eccentric load of a bearing endurance test; 상기 펌프 하우징의 양측단을 고정하는 마운팅 브라켓;A mounting bracket for fixing both ends of the pump housing; 상기 마운팅 브라켓의 일측방의 고정체에 구성되어 마운팅 브라켓의 일측에 대하여 가압력을 조정하여 상기 펌프 하우징을 이동시킴으로써 상기 크랭크 기어 및 구동기어에 대한 펌프기어의 기어간 접촉력을 증감할 수 있도록 하는 접촉력 조절수단;을 포함하는 것을 특징으로 하는 오일펌프용 내구시험장치.The contact force adjustment is configured to be fixed to one side of the mounting bracket to move the pump housing by adjusting the pressing force with respect to one side of the mounting bracket so that the contact force between the gears of the pump gear against the crank gear and the driving gear can be increased or decreased. Endurance testing apparatus for an oil pump comprising a means. 제1항에 있어서, The method of claim 1, 상기 편심하중체는 볼트와 이에 체결되는 너트로 이루어지는 것을 특징으로 하는 오일펌프용 내구시험장치.The eccentric load is an oil pump durability test apparatus, characterized in that consisting of a bolt and a nut fastened thereto. 제1항에 있어서, The method of claim 1, 상기 접촉력 조절수단은 The contact force adjusting means 상기 고정체를 관통하여 체결되어 그 선단이 상기 마운팅 브라켓의 일측단부에 접촉되며, 타단에는 회전 손잡이가 형성되는 스크류 봉으로 이루어지는 것을 특징으로 하는 오일펌프용 내구시험장치.Endurance test apparatus for an oil pump, characterized in that the front end is fastened through the fixing body and the front end thereof is in contact with one end of the mounting bracket, and the other end is made of a screw rod having a rotary knob.
KR1020060043879A 2006-05-16 2006-05-16 A durability test device of oil pump KR100783511B1 (en)

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JP2019015566A (en) * 2017-07-05 2019-01-31 日本精工株式会社 Tester for eccentric rotating component
KR102202641B1 (en) * 2019-07-31 2021-01-13 이정기 Performance Testing device of Hydraudic Pump
CN113916578A (en) * 2021-10-19 2022-01-11 长春职业技术学院 Durability test bed of gear pump for aircraft engine
KR102451265B1 (en) * 2021-12-10 2022-10-06 한전케이피에스 주식회사 Diagnostic system for pump performance and diagnostic method for the same
CN115950616A (en) * 2023-03-08 2023-04-11 中国航空工业集团公司沈阳空气动力研究所 Variable initial attack angle wing type oscillation mechanism of icing wind tunnel and working method

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KR100427664B1 (en) * 2001-10-09 2004-04-28 현대자동차주식회사 Oil pump testing apparatus

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Publication number Priority date Publication date Assignee Title
JP2019015566A (en) * 2017-07-05 2019-01-31 日本精工株式会社 Tester for eccentric rotating component
KR102202641B1 (en) * 2019-07-31 2021-01-13 이정기 Performance Testing device of Hydraudic Pump
CN113916578A (en) * 2021-10-19 2022-01-11 长春职业技术学院 Durability test bed of gear pump for aircraft engine
CN113916578B (en) * 2021-10-19 2022-04-29 长春职业技术学院 Durability test bed of gear pump for aircraft engine
KR102451265B1 (en) * 2021-12-10 2022-10-06 한전케이피에스 주식회사 Diagnostic system for pump performance and diagnostic method for the same
CN115950616A (en) * 2023-03-08 2023-04-11 中国航空工业集团公司沈阳空气动力研究所 Variable initial attack angle wing type oscillation mechanism of icing wind tunnel and working method

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