CN202083542U

CN202083542U - Static load holding mechanism used for environment with great high frequency vibration

Info

Publication number: CN202083542U
Application number: CN 201120004950
Authority: CN
Inventors: 刘炉山; 徐新; 唐卫
Original assignee: China Helicopter Research and Development Institute
Current assignee: China Helicopter Research and Development Institute
Priority date: 2011-01-10
Filing date: 2011-01-10
Publication date: 2011-12-21
Anticipated expiration: 2021-01-10

Abstract

The utility model belongs to field of helicopter paddle fatigue test technology, and refers to a static load holding mechanism used for environment with great high frequency vibration, characterized by comprising a loading actuator (10), two piston type energy storage bottles (20) and two connection blocks (30) wherein the loading actuator (10) comprises a front end cap (11), a piston barrel (17), a rear end cap (13), a piston rod (16) with a piston, and four screws (18), and the piston type energy storage bottles (20) comprises a cylindraceous bottle body (21), a energy storage bottle piston (23) and a lower end cap (25). The static load can be used for static load holding under the great high frequency vibration environment, and satisfy the demand of helicopter paddle fatigue test.

Description

A kind of significantly static load maintaining body of dither environment that is used for

Technical field

The utility model belongs to helicopter blade torture test technology, relates to a kind of static load maintaining body that is used under the dither environment significantly.

Background technology

Static load maintenance method under the vibration environment commonly used has initiatively servo-hydraulic control method and passive buffer method, and passive buffer method mainly contains mechanical damping method etc.Initiatively servo-hydraulic is controlled the loading accuracy height of method, but owing to be subjected to the restriction of servo-control mechanism and hydraulic power unit flow, can not be applied to the vibration environment of the needed significantly high frequency of helicopter blade torture test.The not high reason of mechanical damping method loading accuracy huge owing to mechanism and static load can not satisfy the requirement of helicopter blade torture test.

Summary of the invention

The purpose of this utility model is: provide a kind of static load maintaining body that is used under the dither environment significantly, to satisfy the requirement of helicopter blade torture test.

The technical solution of the utility model is: a kind of significantly static load maintaining body of dither environment that is used for is characterized in that it is formed by loading actuator, two piston type accumulation of energy bottles and two contiguous blocks;

(1) loads actuator by front end end cover, piston cylinder, rear end cap, piston rod and four screw arbor assemblies of having piston are formed, front end end cover is that a front and rear surfaces is foursquare rectangular parallelepiped, a stepped hole that connects front and rear surfaces is arranged on front end end cover, this stepped hole is positioned at the port diameter of front surface less than the port diameter that is positioned at the rear surface, respectively there is a front end end cover screw rod that connects front and rear surfaces to pass the hole at four angles of front end end cover front surface, at the center of front end end cover left and right side a front end end cover intercommunicating pore is arranged respectively, this front end end cover intercommunicating pore is communicated with the enlarged diameter section of front end end cover stepped hole, respectively there is a tapped blind hole at four angles in the left and right side of front end end cover 11, port at front end end cover rear surface center pit has a front end end cover seam, the front end of piston cylinder inserts in the above-mentioned front end end cover seam, between the annular end face of the front end face of piston cylinder and front end end cover seam the front end end cover sealing gasket is arranged; Rear end cap is made up of front and back two parts, the front portion is a square plate, the rear portion is a monaural sheet, the back plate face middle part of the root of this monaural sheet and square plate is connected to integral body, a step blind hole is arranged on the front surface of rear end cap, the leading portion diameter of this step blind hole is greater than back segment, four angles at the front surface of rear end cap respectively have a rear end cap screw rod to pass the hole, insert in the left sector hole of above-mentioned step blind hole the rear end of piston cylinder, between the step end face of the rear end face of piston cylinder and step blind hole, the rear end cap sealing gasket is arranged, screw arbor assembly is made up of screwed screw rod in two ends and nut, respectively there is a screw arbor assembly at four angles at front/rear end cap, the front end of screw rod passes the hole from the front end end cover screw rod and passes forward with nut and combine, the rear end of screw rod is passed the hole from the rear end cap screw rod and is passed backward with nut and combine, and a vent port that is communicated with the reduced diameter section of step blind hole is arranged on any one side of rear end cap; The piston of piston rod rear end is positioned at piston cylinder and keeps clearance fit with the inwall of piston cylinder, between the inwall of the face of cylinder of piston and piston cylinder, piston packing is arranged, the front end of piston rod passes forward from the small diameter bore of front end end cover step center pit, between the hole wall of piston rod and above-mentioned step center pit small diameter bore the piston rod packing circle is arranged; A turnover oil nozzle that is communicated with the working chamber of piston cylinder is arranged on the downside of front end end cover, the working chamber of piston cylinder is meant the piston cylinder inner chamber of piston front, be full of hydraulic oil in the working chamber of piston cylinder, the piston cylinder inner chamber of piston back is the inoperative chamber, and the inoperative chamber is communicated with atmosphere by the step blind hole and the vent port of rear end cap;

(2) piston type accumulation of energy bottle is made up of cylindrical shape bottle, accumulation of energy bottle piston and bottom end cover, the upper end closed of bottle, charging connector by plug for seal is arranged in the upper end of bottle, the lower end of bottle and bottom end cover are connected to integral body by welding or screw, have at the center of bottom end cover and to have externally threaded pipe adapter, accumulation of energy bottle piston packing is arranged between the inwall of accumulation of energy bottle piston and bottle, be full of gases at high pressure in the bottle intracavity on accumulation of energy bottle piston top, be full of hydraulic oil in the bottle intracavity of accumulation of energy bottle piston bottom;

(3) contiguous block is a rectangular parallelepiped, the left and right side size of contiguous block and the left and right side of front end end cover are measure-alike, the screw hole that a perforation is respectively arranged at four angles of the left and right side of contiguous block, the position of above-mentioned four screw holes tapped blind hole with four angles, front end end cover left and right side respectively is corresponding, by screw two contiguous blocks are separately fixed on the left and right side of front end end cover, there is a contiguous block tapped blind hole at upper surface center at the contiguous block that is positioned at the front end end cover left side, the pipe adapter of the bottom end cover of piston type accumulation of energy bottle is screwed in the above-mentioned contiguous block tapped blind hole, between the upper surface of the bottom end cover of piston type accumulation of energy bottle and contiguous block, piston type accumulation of energy bottle sealing gasket is arranged, there is a contiguous block to be communicated with blind hole at the right flank center of the contiguous block that is positioned at the front end end cover left side, this contiguous block is communicated with the front end end cover intercommunicating pore coaxial communication of blind hole and front end end cover, this contiguous block is communicated with at the bottom of being communicated with at the bottom of the hole of blind hole hole with the contiguous block tapped blind hole of contiguous block upper surface, between the left surface of the right flank of the contiguous block on the left of front end end cover and front end end cover contiguous block side seal pad is arranged; At the upper surface center of the contiguous block that is positioned at the front end end cover right side contiguous block tapped blind hole is arranged, the pipe adapter of the bottom end cover of piston type accumulation of energy bottle is screwed in the above-mentioned contiguous block tapped blind hole, between the upper surface of the bottom end cover of piston type accumulation of energy bottle and contiguous block, piston type accumulation of energy bottle sealing gasket is arranged, there is a contiguous block to be communicated with blind hole at the left surface center of the contiguous block that is positioned at the front end end cover right side, this contiguous block is communicated with the front end end cover intercommunicating pore coaxial communication of blind hole and front end end cover, this contiguous block is communicated with at the bottom of being communicated with at the bottom of the hole of blind hole hole with the contiguous block tapped blind hole of contiguous block upper surface, between the right flank of the left surface of the contiguous block on front end end cover right side and front end end cover contiguous block side seal pad is being arranged.

The utility model has the advantages that: the static load that can be used under the dither environment significantly keeps, and has satisfied the requirement of helicopter blade torture test.

Description of drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is a sectional structure chart of the present utility model, and this section is the plane at the axis place of two piston type accumulation of energy bottles, and this section is a front view.Among Fig. 2, the outer direction of paper is the rear, and direction is the place ahead in the paper, and direction is constant up and down.

Fig. 3 crosses the cut-open view load the actuator axis in the utility model, this section is vertical with section among Fig. 2.Among Fig. 3, the left of paper is the place ahead, and the right-hand of paper is the rear, and the outer direction of paper is a left, and direction is right-hand in the paper.

Embodiment

Below the utility model is described in further details.Referring to Fig. 1,2,3, a kind of significantly static load maintaining body of dither environment that is used for is characterized in that, it is formed by loading actuator 10, two piston type accumulation of energy bottles 20 and two contiguous blocks 30;

(1) loads actuator 10 by front end end cover 11, piston cylinder 17, rear end cap 13, piston rod 16 and four screw arbor assemblies 18 of having piston are formed, front end end cover 11 is that a front and rear surfaces is foursquare rectangular parallelepiped, a stepped hole that connects front and rear surfaces is arranged on front end end cover 11, this stepped hole is positioned at the port diameter of front surface less than the port diameter that is positioned at the rear surface, respectively there is a front end end cover screw rod that connects front and rear surfaces to pass the hole at four angles of front end end cover 11 front surfaces, at the center of front end end cover 11 left and right sides a front end end cover intercommunicating pore 12 is arranged respectively, this front end end cover intercommunicating pore 12 is communicated with the enlarged diameter section of front end end cover stepped hole, respectively there is a tapped blind hole at four angles in the left and right side of front end end cover 11, port at front end end cover 11 rear surface center pits has a front end end cover seam, the front end of piston cylinder 17 inserts in the above-mentioned front end end cover seam, between the annular end face of the front end face of piston cylinder 17 and front end end cover seam the front end end cover sealing gasket is arranged; Rear end cap 13 is made up of front and back two parts, the front portion is a square plate, the rear portion is a monaural sheet, the back plate face middle part of the root of this monaural sheet and square plate is connected to integral body, a step blind hole is arranged on the front surface of rear end cap 13, the leading portion diameter of this step blind hole is greater than back segment, four angles at the front surface of rear end cap 13 respectively have a rear end cap screw rod to pass the hole, insert in the left sector hole of above-mentioned step blind hole the rear end of piston cylinder 17, between the step end face of the rear end face of piston cylinder 17 and step blind hole, the rear end cap sealing gasket is arranged, screw arbor assembly is made up of screwed screw rod in two ends and nut, respectively there is a screw arbor assembly at four angles at front/rear end cap, the front end of screw rod passes the hole from the front end end cover screw rod and passes forward with nut and combine, the rear end of screw rod is passed the hole from the rear end cap screw rod and is passed backward with nut and combine, and a vent port 15 that is communicated with the reduced diameter section of step blind hole is arranged on any one side of rear end cap 13; The piston of piston rod 16 rear ends is positioned at piston cylinder 17 and keeps clearance fit with the inwall of piston cylinder 17, between the inwall of the face of cylinder of piston and piston cylinder 17, piston packing is arranged, the front end of piston rod 16 passes forward from the small diameter bore of front end end cover 11 step center pits, between the hole wall of piston rod 16 and above-mentioned step center pit small diameter bore the piston rod packing circle is arranged; A turnover oil nozzle that is communicated with the working chamber of piston cylinder 17 is arranged on the downside of front end end cover 11, the working chamber of piston cylinder 17 is meant the piston cylinder inner chamber of piston front, be full of hydraulic oil in the working chamber of piston cylinder 17, the piston cylinder inner chamber of piston back is the inoperative chamber, and the inoperative chamber is communicated with atmosphere by the step blind hole and the vent port 15 of rear end cap 13;

(2) piston type accumulation of energy bottle 20 is made up of cylindrical shape bottle 21, accumulation of energy bottle piston 23 and bottom end cover 25, the upper end closed of bottle 21, charging connector by plug for seal is arranged in the upper end of bottle 21, the lower end of bottle 21 and bottom end cover 25 are connected to integral body by welding or screw, have at the center of bottom end cover 25 and to have externally threaded pipe adapter, accumulation of energy bottle piston packing is arranged between the inwall of accumulation of energy bottle piston 23 and bottle 21, be full of gases at high pressure in the bottle intracavity 22 on accumulation of energy bottle piston 23 tops, be full of hydraulic oil in the bottle intracavity 24 of accumulation of energy bottle piston 23 bottoms;

(3) contiguous block 30 is rectangular parallelepipeds, the left and right side size of contiguous block 30 and the left and right side of front end end cover 11 are measure-alike, the screw hole that a perforation is respectively arranged at four angles of the left and right side of contiguous block 30, the position of above-mentioned four screw holes tapped blind hole with four angles, front end end cover 11 left and right sides respectively is corresponding, by screw two contiguous blocks 30 are separately fixed on the left and right side of front end end cover 11, at the upper surface center of the contiguous block 30 that is positioned at front end end cover 11 left sides a contiguous block tapped blind hole 31 is arranged, the pipe adapter of the bottom end cover 25 of piston type accumulation of energy bottle 20 is screwed in the above-mentioned contiguous block tapped blind hole 31, between the upper surface of the bottom end cover 25 of piston type accumulation of energy bottle 20 and contiguous block 30, piston type accumulation of energy bottle sealing gasket is arranged, there is a contiguous block to be communicated with blind hole 32 at the right flank center of the contiguous block 30 that is positioned at front end end cover 11 left sides, this contiguous block is communicated with front end end cover intercommunicating pore 12 coaxial communication of blind hole 32 and front end end cover 11, this contiguous block is communicated with at the bottom of being communicated with at the bottom of the hole of blind hole 32 hole with the contiguous block tapped blind hole 31 of contiguous block 30 upper surfaces, between the left surface of the right flank of the contiguous block 30 in front end end cover 11 left sides and front end end cover 11 contiguous block side seal pad is being arranged; At the upper surface center of the contiguous block 30 that is positioned at front end end cover 11 right sides a contiguous block tapped blind hole 31 is arranged, the pipe adapter of the bottom end cover 25 of piston type accumulation of energy bottle 20 is screwed in the above-mentioned contiguous block tapped blind hole 31, between the upper surface of the bottom end cover 25 of piston type accumulation of energy bottle 20 and contiguous block 30, piston type accumulation of energy bottle sealing gasket is arranged, there is a contiguous block to be communicated with blind hole 32 at the left surface center of the contiguous block 30 that is positioned at front end end cover 11 right sides, this contiguous block is communicated with front end end cover intercommunicating pore 12 coaxial communication of blind hole 32 and front end end cover 11, this contiguous block is communicated with at the bottom of being communicated with at the bottom of the hole of blind hole 32 hole with the contiguous block tapped blind hole 31 of contiguous block 30 upper surfaces, between the right flank of the left surface of the contiguous block 30 on front end end cover 11 right sides and front end end cover 11 contiguous block side seal pad is being arranged.

Principle of work of the present utility model is: the charging connector of the upper end by bottle 21 charges into the gas of suitable pressure in bottle intracavity 22 after, size according to required static load on the piston rod 16, by the turnover oil nozzle on the downside of front end end cover 11 toward loading the hydraulic oil that injects certain pressure in the actuator 10, to realize applying of static load.Because the static load that applied is under the environment of dither significantly, piston rod 16 also will be followed significantly dither environment servo-actuated, and the servo-actuated of piston rod 16 must cause the fluctuation of oil pressure in the working chamber of piston cylinder 17.Because the working chamber of piston cylinder 17 is communicated with blind hole 32 with the bottle intracavity 24 of piston type accumulation of energy bottle 20 by contiguous block and contiguous block tapped blind hole 31 communicates, when the working chamber of piston cylinder 17 and the fluctuation of bottle intracavity 24 internal pressures, accumulation of energy bottle piston 23 can move up and down, and bottle intracavity 22 inner high voltage gases also can correspondingly be compressed or discharge.Be specially: when the static load on the piston rod 16 had the trend of passive increase, piston rod 16 protracted, and oil pressure raises in the working chamber of piston cylinder 17 and the bottle intracavity 24, moves on the accumulation of energy bottle piston 23, and the gas in the bottle intracavity 22 is compressed; Otherwise, when the static load on the piston rod 16 has the passive trend that reduces, contracting behind the piston rod 16, oil pressure reduce in the working chamber of piston cylinder 17 and the bottle intracavity 24, and accumulation of energy bottle piston 23 moves down, and the gases in the bottle intracavity 22 are released.Because the compressibility of gas is big, when piston rod 16 was followed the servo-actuated of dither environment, pressure fluctuation was significantly alleviated in the working chamber of piston cylinder 17---the undulate quantity that is required static load is very little, reaches the purpose of stablizing required static load.

Claims

1. one kind is used for the significantly static load maintaining body of dither environment, it is characterized in that, it is formed by loading actuator [10], two piston type accumulation of energy bottles [20] and two contiguous blocks [30];

(1) loads actuator [10] by front end end cover [11], piston cylinder [17], rear end cap [13], the piston rod [16] and four screw arbor assemblies [18] that have piston are formed, front end end cover [11] is that a front and rear surfaces is foursquare rectangular parallelepiped, a stepped hole that connects front and rear surfaces is arranged on front end end cover [11], this stepped hole is positioned at the port diameter of front surface less than the port diameter that is positioned at the rear surface, respectively there is a front end end cover screw rod that connects front and rear surfaces to pass the hole at four angles of front end end cover [11] front surface, respectively there is a front end end cover intercommunicating pore [12] at center in front end end cover [11] left and right side, this front end end cover intercommunicating pore [12] is communicated with the enlarged diameter section of front end end cover stepped hole, respectively there is a tapped blind hole at four angles in the left and right side of front end end cover [11], port at front end end cover [11] rear surface center pit has a front end end cover seam, the front end of piston cylinder [17] inserts in the above-mentioned front end end cover seam, between the annular end face of the front end face of piston cylinder [17] and front end end cover seam the front end end cover sealing gasket is arranged; Rear end cap [13] is made up of front and back two parts, the front portion is a square plate, the rear portion is a monaural sheet, the back plate face middle part of the root of this monaural sheet and square plate is connected to integral body, a step blind hole is arranged on the front surface of rear end cap [13], the leading portion diameter of this step blind hole is greater than back segment, four angles at the front surface of rear end cap [13] respectively have a rear end cap screw rod to pass the hole, insert in the left sector hole of above-mentioned step blind hole the rear end of piston cylinder [17], between the step end face of the rear end face of piston cylinder [17] and step blind hole, the rear end cap sealing gasket is arranged, screw arbor assembly is made up of screwed screw rod in two ends and nut, respectively there is a screw arbor assembly at four angles at front/rear end cap, the front end of screw rod passes the hole from the front end end cover screw rod and passes forward with nut and combine, the rear end of screw rod is passed the hole from the rear end cap screw rod and is passed backward with nut and combine, and a vent port [15] that is communicated with the reduced diameter section of step blind hole is arranged on any one side of rear end cap [13]; The piston of piston rod [16] rear end is positioned at piston cylinder [17] and keeps clearance fit with the inwall of piston cylinder [17], between the inwall of the face of cylinder of piston and piston cylinder [17], piston packing is arranged, the front end of piston rod [16] passes forward from the small diameter bore of front end end cover [11] step center pit, between the hole wall of piston rod [16] and above-mentioned step center pit small diameter bore the piston rod packing circle is arranged; A turnover oil nozzle that is communicated with the working chamber of piston cylinder [17] is arranged on the downside of front end end cover [11], the working chamber of piston cylinder [17] is meant the piston cylinder inner chamber of piston front, be full of hydraulic oil in the working chamber of piston cylinder [17], the piston cylinder inner chamber of piston back is the inoperative chamber, and the inoperative chamber is communicated with atmosphere by the step blind hole and the vent port [15] of rear end cap [13];

(2) piston type accumulation of energy bottle [20] is by cylindrical shape bottle [21], accumulation of energy bottle piston [23] and bottom end cover [25] are formed, the upper end closed of bottle [21], charging connector by plug for seal is arranged in the upper end of bottle [21], the lower end of bottle [21] and bottom end cover [25] are connected to integral body by welding or screw, have at the center of bottom end cover [25] and to have externally threaded pipe adapter, accumulation of energy bottle piston packing is arranged between the inwall of accumulation of energy bottle piston [23] and bottle [21], be full of gases at high pressure in the bottle intracavity [22] on accumulation of energy bottle piston [23] top, be full of hydraulic oil in the bottle intracavity [24] of accumulation of energy bottle piston [23] bottom;

(3) contiguous block [30] is a rectangular parallelepiped, the left and right side of the left and right side size of contiguous block [30] and front end end cover [11] is measure-alike, the screw hole that a perforation is respectively arranged at four angles of the left and right side of contiguous block [30], the position of above-mentioned four screw holes tapped blind hole with four angles, front end end cover [11] left and right side respectively is corresponding, by screw two contiguous blocks [30] are separately fixed on the left and right side of front end end cover [11], there is a contiguous block tapped blind hole [31] at upper surface center at the contiguous block [30] that is positioned at front end end cover [11] left side, the pipe adapter of the bottom end cover [25] of piston type accumulation of energy bottle [20] is screwed in the above-mentioned contiguous block tapped blind hole [31], between the upper surface of the bottom end cover [25] of piston type accumulation of energy bottle [20] and contiguous block [30], piston type accumulation of energy bottle sealing gasket is arranged, there is a contiguous block to be communicated with blind hole [32] at the right flank center of the contiguous block [30] that is positioned at front end end cover [11] left side, this contiguous block is communicated with front end end cover intercommunicating pore [12] coaxial communication of blind hole [32] and front end end cover [11], this contiguous block is communicated with at the bottom of being communicated with at the bottom of the hole of blind hole [32] hole with the contiguous block tapped blind hole [31] of contiguous block [30] upper surface, between the left surface of right flank that is positioned at the contiguous block [30] on the left of the front end end cover [11] and front end end cover [11] contiguous block side seal pad is arranged; There is a contiguous block tapped blind hole [31] at upper surface center at the contiguous block [30] that is positioned at front end end cover [11] right side, the pipe adapter of the bottom end cover [25] of piston type accumulation of energy bottle [20] is screwed in the above-mentioned contiguous block tapped blind hole [31], between the upper surface of the bottom end cover [25] of piston type accumulation of energy bottle [20] and contiguous block [30], piston type accumulation of energy bottle sealing gasket is arranged, there is a contiguous block to be communicated with blind hole [32] at the left surface center of the contiguous block [30] that is positioned at front end end cover [11] right side, this contiguous block is communicated with front end end cover intercommunicating pore [12] coaxial communication of blind hole [32] and front end end cover [11], this contiguous block is communicated with at the bottom of being communicated with at the bottom of the hole of blind hole [32] hole with the contiguous block tapped blind hole [31] of contiguous block [30] upper surface, between the right flank of the left surface of the contiguous block [30] that is positioned at front end end cover [11] right side and front end end cover [11] contiguous block side seal pad is arranged.