CN102840159A - Negative pressure adjusting device for inlet of compressor with variable diameter - Google Patents

Negative pressure adjusting device for inlet of compressor with variable diameter Download PDF

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Publication number
CN102840159A
CN102840159A CN201210364450XA CN201210364450A CN102840159A CN 102840159 A CN102840159 A CN 102840159A CN 201210364450X A CN201210364450X A CN 201210364450XA CN 201210364450 A CN201210364450 A CN 201210364450A CN 102840159 A CN102840159 A CN 102840159A
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China
Prior art keywords
blade
fixing frame
negative pressure
shifting shaft
pressure adjusting
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CN201210364450XA
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CN102840159B (en
Inventor
张虹
王云龙
冯志学
鲍捷
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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Abstract

The invention relates to a negative pressure adjusting device for an inlet of a compressor with a variable diameter, which is especially applicable to a compressor performance testing platform of a vehicular turbocharger, belonging to a machinery technical field. The negative pressure adjusting device comprises a fixing frame, a plurality of blades and an operation device; the blades are aligned according to the clockwise order, so that the peak end of every blade is pressed on the former one blade, blade rotating shafts are correspondingly inserted to blade rotating shaft positioning holes on the fixing frame one by one; so that all the blades are aligned in a fixing frame groove in a staggering manner. Stirring shafts on the operation disk are respectively crossed through the through grooves on the corresponding blades, and then the end parts of the stirring shafts are inserted to stirring shaft guide grooves of the fixing frame. With the adoption of the negative pressure adjusting device, the section of a through flow at the compressor inlet is conveniently and quickly changed, and therefore, the inlet negative pressure of the compressor is adjusted; the regular shape of the through flow face and the symmetry related to the pipeline center can be guaranteed, the air inlet resistance is reduced, and the bad influence on the test by the irregular shape of the air inlet is eliminated.

Description

Variable-diameter compressor inlet negative pressure adjusting device
Technical field
The present invention relates to a kind of variable-diameter compressor inlet negative pressure adjusting device, be specially adapted to vehicle turbocharger gas compressor performance test stand, belong to field of mechanical technique.
Background technique
Because the various advantages of turbosupercharger, present most DENGs and part petrol engine have all adopted exhaust turbine pressuring technology.In order to guarantee reliability, Security and the high efficiency of vehicle supercharger in pressurization, the Performance Detection before the pressurized machine installation operation just seems particularly important.The performance test of vehicle turbocharger mainly comprises turbine performance test and two aspects of gas compressor performance test.In the gas compressor performance test, the compressor inlet negative pressure is an importance of performance test to the Effect on Performance of gas compressor own.At present, on the gas compressor performance test stand commonly used, be not used for carrying out the device that the compressor inlet negative pressure is regulated specially at home and abroad.Usually adopt manually-operable in the experiment, one shutter is installed,, change inlet pipeline passage section area through manual setting shutter position at the compressor inlet place, thus the size of adjustment compressor inlet negative pressure.Though this kind method is simple in structure, easy operating, pure manual mode not only can not satisfy the required required precision of test in the process of adjustment, and operation is safe and efficient inadequately.Manual mode also is not suitable under gas compressor dispatches from the factory the more situation of mass detection or experiment condition point, accomplishing.In addition, through the pipeline passage section out-of-shape of shutter adjustment, and through-flow face departs from pipeline center, relies on pipeline one side, can cause certain influence to gas flow like this, causes the degree of accuracy of test result to descend.
The leakage of oil problem is the problem commonly used and demand urgently overcoming that vehicle turbocharger is used on vehicle, directly has influence on the performance and the exhaust index of vehicular engine.The design of the operating conditions of leakage of oil and motor and pressurized machine is relevant in real work.Concerning gas compressor, in the turbosupercharger using process,, the compressor inlet negative pressure prescribes a time limit when surpassing certain going up, and seal arrangement pressure at both sides balance is destroyed, and lubricant oil sees through seal ring and is seeped into gas compressor inside, has influenced the performance of gas compressor greatly.Along with the continuous wearing and tearing of each connection and seal arrangement in the using process, the negative pressure upper limit also can constantly reduce.The peak suction that the gas compressor seal arrangement can bear is an important indicator of weighing sealing, and does not all have good method that it is detected at the current experiments platform always.For the relation of studying effectively between compressor inlet negative pressure and the gas compressor leakage of oil is more arranged; For factory inspection, the maintenance service of pressurized machine provides the standard foundation; Must on test stand, utilize covering device effective and rapid ground adjustment compressor inlet negative pressure; For carrying out of experiment provides technical support, so that before pressurized machine dispatches from the factory, dynamically get rid of the leakage of oil hidden danger that causes by assembling or part quality problem rapidly and accurately in the Oil Leakage Detecting.
Summary of the invention
The objective of the invention is to propose a kind of compressor inlet negative pressure adjusting device of variable-diameter for solving the problem that existing gas compressor performance test stand import negative pressure regulative mode is clumsy, control accuracy is lower.
The objective of the invention is to realize through following technological scheme:
A kind of compressor inlet negative pressure adjusting device of variable-diameter specifically comprises fixing frame, a plurality of blade and Effector.
Described fixing frame is a groove-like, and the center is the aperture of hollow; To the inside grooves of fixing frame outer rim, radially dig blade rotor positioning hole and shifting shaft guiding groove from the aperture; It is on the circumference in the center of circle that many group blade rotor positioning holes and shifting shaft guiding groove are evenly distributed on the fixing frame centre of form, and quantity is identical with lobe numbers respectively.The spacing pier of a plurality of semicircle dashboards that distributing equably on the fixing frame outer rim inwall, each spacing pier be between two adjacent shifting shaft guiding grooves the footpath upwards.
Described lobe numbers is 6 to 9, and the blade profile shape is formed by a series of circular arc and transition wire smooth transition.The radius of the outside great circle camber line of blade is less than fixing frame outer rim radius, to guarantee that blade can be installed in the fixing frame groove.The inboard little circle radius of blade is greater than the radius of fixing frame center bore, the maximum flow area when guaranteeing the blade standard-sized sheet.The blade tip profile line can guarantee that each blade is staggered, and can not move interference between the different blades during blade rotation.One end of each blade is equipped with a blade rotation axle, and the blade rotation axle positioning hole Spielpassung on its size and the fixing frame guarantees that blade installation can be around blade rotation axle rotating certain angle behind fixing frame inside.In addition, have a groove on each blade.The width of groove guarantees that shifting shaft can pass in groove, length receives the restriction of blade movement amplitude.
Described Effector comprise annular dashboard, operating handle and with the corresponding to shifting shaft of lobe numbers; Shifting shaft is evenly distributed on the annular dashboard, and the position is corresponding one by one with shifting shaft guiding groove on the fixing frame.On the another side of annular dashboard operating handle is installed.The annular dashboard is consistent with the fixing frame shape, and its external diameter is less than the fixing frame external diameter, and center bore is identical with fixing frame center bore size.
The assembly relation of compressor inlet negative pressure adjusting device of the present invention is: press clockwise sequence and arrange blade; The point that guarantees each blade all is pressed on its last blade; The blade rotation axle is inserted the blade rotation axle positioning hole on the fixing frame correspondingly, all blades are staggered in the fixing frame groove.Shifting shaft on the dashboard is passed the groove on the corresponding with it blade respectively, the end of shifting shaft is inserted in the shifting shaft guiding groove of fixing frame.
The compressor inlet negative pressure adjusting device of variable-diameter of the present invention is installed on the gas compressor performance test stand between the charge flow rate meter and compressor inlet; When carrying out compressor inlet negative pressure and gas compressor performance test; Driving blade through operating handle rotates along the shifting shaft guiding groove; Reach the purpose that enlarges or dwindle the import cross section, keeping the compressor inlet negative pressure is definite value, is convenient to measure the various performance parameters of gas compressor this moment.When carrying out gas compressor leakage of oil detection of negative pressure, through the control of operating handle, change the import cross section gradually, measure the air-intake negative-pressure critical value that gas compressor begins leakage of oil.
Beneficial effect
Compare with used manual negative pressure regulative mode, the present invention can change compressor inlet place passage section quickly and easily, thus adjustment compressor inlet negative pressure; And can guarantee through-flow the regular shape and the symmetry properties at relative duct size center, reduce intake resistance, eliminate because the irregular harmful effect that brings to test of intake port shape.
Description of drawings
Fig. 1 is a variable-diameter compressor inlet negative pressure adjusting device overall structure machine drawing of the present invention;
Fig. 2 is a fixing frame mechanical structure schematic representation in the embodiment;
Fig. 3 is a blade mechanical structure schematic representation in the embodiment;
Fig. 4 is an Effector mechanical structure schematic representation in the embodiment;
Fig. 5 is a variable-diameter compressor inlet negative pressure adjusting device working state schematic representation in the embodiment; Wherein (a) and (b), (c), (d) are respectively maximum through-flow, 4/5 through-flow, 1/2 through-flow, minimum through-flow effect schematic representation;
Fig. 6 is a compressor inlet negative pressure adjusting device test platform structure schematic representation in the embodiment.
Label declaration: 1-fixing frame, 2-blade, 3-Effector, 4-blade rotor positioning hole; 5-shifting shaft guiding groove, the spacing pier of 6-dashboard, 7-blade rotation axle, 8-groove; 9-dashboard, 10-shifting shaft, 11-operating handle, 12-Air flow meter; 13-negative pressure adjusting device, 14-negative pressure measuring device, 15-gas compressor.
Embodiment
Below be specific embodiment of the present invention, and combine accompanying drawing that embodiment of the present invention are further described.
As shown in Figure 1, the present invention mainly is made up of fixing frame 1, blade 2 and Effector 3.
As shown in Figure 2, said fixing frame is the groove shaped framework, and the center is the aperture of hollow.In the present embodiment, the fixing frame external diameter is 84mm, and internal diameter is 40mm, and framework wall thickness is 3mm.To the inside grooves of fixing frame outer rim, radially dig 6 groups of blade rotor positioning holes 4 and shifting shaft guiding groove 5 from the aperture.6 blade rotation axle positioning holes are evenly distributed in the fixing frame centre of form to be the center of circle, to be on the circle of diameter with 48mm that each positioning hole diameter is 2.02mm.Guiding groove is the fan annular, and outer shroud and interior ring diameter are respectively 64mm, 56mm, and the pairing central angle of fan ring is 25 °, and the fan ring is on one side on the diameter at place, the corresponding positioning hole center of circle.Guiding groove plays the motion guide effect to the shifting shaft on the Effector, can also play certain position-limiting action to Effector in addition.6 the spacing piers 6 of semicircle that on the fixing frame cell wall, also distributing equably, the radial design of spacing pier is 3mm, highly is 2mm, concrete size is as shown in Figure 2.Spacing pier plays the axial limiting effect when fixing frame and Effector assembling.
As shown in Figure 3, the blade profile line is made up of smooth circular arc line and some transition connecting lines.Consider the regularity of structural complexity and circulation inlet, the lobe numbers in this device is elected 6 as.The outside great circle camber line of blade, it is 38.99mm that radius is slightly less than fixing frame outer rim radius, to guarantee that blade can be installed in the fixing frame groove.It is 21mm that the inboard little circle radius of blade also should be slightly larger than the fixing frame internal diameter, the maximum flow area during with assurance blade standard-sized sheet.The blade tip profile line should guarantee that each blade can be staggered, and can not move interference between the different blades during blade rotation.End at blade is provided with the blade rotation axle 7 that diameter is 2mm, and the blade rotation axle spacing hole Spielpassung on rotatingshaft and the fixing frame guarantees the moving axis rotating certain angle that can rotate after blade installation is in fixing frame.In addition, have on the blade with Effector on the groove 8 that matches of shifting shaft.The width of groove should guarantee that shifting shaft can pass in groove, the length of groove also receives the restriction of blade movement amplitude, and concrete size is as shown in Figure 3.
As shown in Figure 4, Effector comprises dashboard 9, shifting shaft 10, operating handle 11 3 parts.Said dashboard is a ring-type, and its external diameter is that 77.98mm is slightly less than fixing frame cell wall internal diameter, can normal mounting advance in the fixing frame to guarantee dashboard, and its internal diameter 42mm is slightly larger than the fixing frame internal diameter, with the maximum flow area of assurance device.The shifting shaft diameter is that 1.98mm is evenly distributed on the dashboard.Said operating handle is used for handling dashboard, through stirring the rotation of operating handle drive dashboard.
The integral installation timing is inserted into the rotatingshaft of blade in the rotatingshaft positioning hole on the fixing frame, presses clockwise sequence and arranges blade, guarantees that the point of each blade all is pressed on its last blade, and all blades are staggered.Shifting shaft on the dashboard is passed the groove on the corresponding with it blade respectively, the end of shifting shaft is inserted in the guiding groove on the fixing frame.This installs assembled, and is as shown in Figure 1.In test; Rotate operating handle, dashboard will rotate around its centre of form, and the shifting shaft on the dashboard is stirred blade; Each blade rotates around rotatingshaft separately; Area of overlap between the adjacent blades changes, and through-flow the size that surrounded by all blades this moment changes, and has promptly realized change diameter adjustment function.As shown in Figure 5, figure a, b, c, d are respectively maximum through-flow, 1/5 through-flow, 1/2 through-flow, minimum through-flow effect schematic representation.
As shown in Figure 6, on the gas compressor performance test stand, said negative pressure adjusting device 13 is installed between the import of compressor air inlet machine flowmeter 12 and gas compressor 15.Negative pressure measuring device 14 also is housed between negative pressure adjusting device and compressor inlet.When carrying out the test of compressor inlet negative pressure and gas compressor property relationship, need the compressor inlet negative pressure be set in different value, measure the performance parameter of gas compressor under each definite value negative pressure then respectively.Through adjusting operation equipment expansion or dwindling the import cross section, remaining the compressor inlet negative pressure is definite value, thereby measures the various performance parameters of gas compressor this moment.When carrying out gas compressor leakage of oil detection of negative pressure; Change the import cross section through Effector; The compressor inlet negative pressure is perhaps dwindled in supercharging gradually; When oil leakage phenomenon appears in gas compressor, read corresponding negative pressure value from negative pressure measuring device 14, this negative pressure value is the air-intake negative-pressure critical value that gas compressor begins leakage of oil.As long as this critical value can leakage of oil after, just guaranteeing the gas compressor loading operation greater than the peak suction value of gas compressor in real work.Otherwise,, then need check the assembling situation of pressurized machine and the quality problems of seal arrangement once more if the leakage of oil critical value can not reach requirement.

Claims (5)

1. variable-diameter compressor inlet negative pressure adjusting device is characterized in that: comprise fixing frame, a plurality of blade and Effector;
Described fixing frame is a groove-like, and the center is the aperture of hollow; To the inside grooves of fixing frame outer rim, radially dig blade rotor positioning hole and shifting shaft guiding groove from the aperture; It is on the circumference in the center of circle that many group blade rotor positioning holes and shifting shaft guiding groove are evenly distributed on the fixing frame centre of form, and quantity is identical with lobe numbers respectively; The spacing pier of a plurality of semicircle dashboards that distributes equably on the fixing frame outer rim inwall, each spacing pier be between two adjacent shifting shaft guiding grooves the footpath upwards;
Described blade profile shape is formed by a series of circular arc and transition wire smooth transition; The radius of the outside great circle camber line of blade is less than fixing frame outer rim radius, and the inboard little circle radius of blade is greater than the radius of fixing frame center bore; One end of each blade is equipped with a blade rotation axle, and the blade rotation axle positioning hole Spielpassung on its size and the fixing frame guarantees that blade installation can be around blade rotation axle rotating certain angle behind fixing frame inside; Have a groove on each blade;
Described Effector comprise annular dashboard, operating handle and with the corresponding to shifting shaft of lobe numbers; Shifting shaft is evenly distributed on the annular dashboard, and the position is corresponding one by one with shifting shaft guiding groove on the fixing frame; On the another side of annular dashboard operating handle is installed; The annular dashboard is consistent with the fixing frame shape, and its external diameter is less than the fixing frame external diameter, and center bore is identical with fixing frame center bore size;
The assembly relation of said compressor inlet negative pressure adjusting device is: press clockwise sequence and arrange blade; The point that guarantees each blade all is pressed on its last blade; The blade rotation axle is inserted the blade rotation axle positioning hole on the fixing frame correspondingly, all blades are staggered in the fixing frame groove; Shifting shaft on the dashboard is passed the groove on the corresponding with it blade respectively, the end of shifting shaft is inserted in the shifting shaft guiding groove of fixing frame.
2. variable-diameter compressor inlet negative pressure adjusting device according to claim 1 is characterized in that: described lobe numbers is the 6-9 sheet.
3. variable-diameter compressor inlet negative pressure adjusting device according to claim 1 is characterized in that: the width of said groove guarantees that shifting shaft can pass in groove, length receives the restriction of blade movement amplitude.
4. variable-diameter compressor inlet negative pressure adjusting device according to claim 1 is characterized in that: said blade tip profile line guarantees that each blade is staggered, and can not move interference between the different blades during blade rotation.
5. variable-diameter compressor inlet negative pressure adjusting device according to claim 1 is characterized in that: be installed on the gas compressor performance test stand between the charge flow rate meter and compressor inlet.
CN201210364450.XA 2012-09-26 2012-09-26 Negative pressure adjusting device for inlet of compressor with variable diameter Active CN102840159B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104632681A (en) * 2015-01-30 2015-05-20 哈尔滨工程大学 Hovercraft model hover fan system characteristic performance curve detecting and adjusting device
CN105593527A (en) * 2013-10-02 2016-05-18 大陆汽车有限公司 Compressor with variable compressor inlet
CN106628064A (en) * 2016-11-25 2017-05-10 蒋沁攸 Diameter-changing swimming ring
CN106762031A (en) * 2016-12-23 2017-05-31 长春市奔腾动力科技有限公司 Round entrance section-variable formula gs-oil separator
CN106762032A (en) * 2016-12-23 2017-05-31 吉林大学 A kind of air inlet section type variable gs-oil separator
CN109966902A (en) * 2019-01-23 2019-07-05 山东神华山大能源环境有限公司 A kind of vane-type variable diameter Venturi throat
CN111015893A (en) * 2019-12-28 2020-04-17 佛山市鼎科科技发展有限公司 3D clay printer
DE102019217106A1 (en) 2018-12-03 2020-06-04 Ford Global Technologies, Llc Turbocharger with an inlet assembly

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105593527A (en) * 2013-10-02 2016-05-18 大陆汽车有限公司 Compressor with variable compressor inlet
CN104632681A (en) * 2015-01-30 2015-05-20 哈尔滨工程大学 Hovercraft model hover fan system characteristic performance curve detecting and adjusting device
CN106628064A (en) * 2016-11-25 2017-05-10 蒋沁攸 Diameter-changing swimming ring
CN106762031A (en) * 2016-12-23 2017-05-31 长春市奔腾动力科技有限公司 Round entrance section-variable formula gs-oil separator
CN106762032A (en) * 2016-12-23 2017-05-31 吉林大学 A kind of air inlet section type variable gs-oil separator
CN106762032B (en) * 2016-12-23 2018-11-27 吉林大学 A kind of air inlet section type variable gs-oil separator
DE102019217106A1 (en) 2018-12-03 2020-06-04 Ford Global Technologies, Llc Turbocharger with an inlet assembly
CN109966902A (en) * 2019-01-23 2019-07-05 山东神华山大能源环境有限公司 A kind of vane-type variable diameter Venturi throat
CN111015893A (en) * 2019-12-28 2020-04-17 佛山市鼎科科技发展有限公司 3D clay printer

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