CN102168734B

CN102168734B - Through-flow area adjustable control valve for connecting air spring and additional air chamber

Info

Publication number: CN102168734B
Application number: CN2011101070614A
Authority: CN
Inventors: 江洪; 孙丽琴; 王申旭; 高明宏; 黄定师
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2012-11-07
Anticipated expiration: 2031-04-27
Also published as: CN102168734A

Abstract

The invention discloses a through-flow area adjustable control valve for connecting an air spring and an additional air chamber. One end of a side steel tube is in sealed connection with the sidewall of a steel tube and is communicated with an inner cavity of the upper part of the steel tube; a stepping motor is arranged in an upper end cover; a transmission shaft, a preloaded spring, a first round steel plate membrane and a second round steel plate membrane are arranged in sequence in the tube on the upper part of the steel tube from top to bottom; the second round steel plate membrane is radially fixed in the tube of the steel tube; the first round steel plate membrane is laminated coaxially on the upper surface of the second round steel plate membrane; the transmission shaft is sleeved with the preloaded spring; the upper end of the transmission shaft is connected with the stepping motor, and the lower end of the transmission shaft is connected with the first round steel plate membrane; the first round steel plate membrane is provided with a semi-circular annular hole; the second round steel plate membrane is provided with an annular groove corresponding to the semi-circular annular hole; the annular groove has the same inner circular arc radius as the semi-circular annular hole; and the precise adjustment of the flow area inside the tube can be realized within a certain opening degree, and the damping of a pipeline between the air spring and the additional air chamber is effectively changed.

Description

A kind of flow area adjustable control valve that connects pneumatic spring and auxiliary chamber

Technical field

The present invention relates to a kind of flow control valve, and relate more specifically to a kind of flow control valve that is installed between pneumatic spring and the auxiliary chamber.

Background technique

The injustice excitation on vehicle driving road surface or the variation of spring carried mass can cause the variation of running parameters such as pneumatic spring internal pressure and actual volume, cause air spring rigidity generation nonlinear change then.Therefore, adjustable suspension damping could form matched well with air spring rigidity, reaches the high-performance of air suspension vehicle dynamic operation.And the damping part of suspension is from the pipeline between pneumatic spring and the auxiliary chamber; Damping in the pipeline is mainly from the control valve in the pipeline; Thereby; The control valve that flow area is adjustable can change the damping of pipeline between pneumatic spring and the auxiliary chamber, and the flow control valve of existing adjusting flow area can't carry out effective adjusting of flow area when being applied on the pneumatic spring to the damping characteristic of throttle orifice in the air spring system.

Summary of the invention

The purpose of this invention is to provide a kind of adjustable control valve of flow area that connects pneumatic spring and auxiliary chamber, can according to the damping characteristic change circulation area of throttle orifice, thereby obtain required damping according to the working condition signal of vehicle.

The technological scheme that the present invention adopts is: comprise columned steel pipe, side steel pipe and with the upper end cap of steel pipe upper end sealing, be tightly connected steel pipe sidewall and be communicated with of side steel pipe one end with steel pipe top inner chamber; Be provided with stepper motor in the upper end cap, set gradually transmission shaft, preloading spring, the first round plate diaphragm and the second round plate diaphragm in the pipe on steel pipe top from top to bottom; The second round plate diaphragm radially is fixed in the pipe of steel pipe, the coaxial first round plate diaphragm that stacked on the second round plate diaphragm upper surface; Be with preloading spring on the transmission shaft, the transmission shaft upper end connects stepper motor, and the lower end connects the first round plate diaphragm; The taper pin that the first round plate diaphragm, the affixed transmission shaft in upper end are provided with is pressed in the preloading spring lower end; Establish a semi-round ring shape hole on the first round plate diaphragm; Establish a circular groove corresponding with the semi-round ring shape hole site on the second round plate diaphragm, circular groove is identical with the inner arc radius in semi-round ring shape hole.

Circulation area can realize accurately regulating in a certain aperture in the pipe of the present invention, effectively changes the damping of pipeline between pneumatic spring and the auxiliary chamber, improves the matching performance between whole suspension system rigidity and the damping.

Description of drawings

Fig. 1 is the schematic cross-section of structure of the present invention;

Fig. 2 is the cross-sectional view of the first round plate diaphragm 8 among Fig. 1;

Fig. 3 is the cross-sectional view of the second round plate diaphragm 9 among Fig. 1;

Fig. 4 is the working state cross-sectional view of first and second round plate diaphragm 8,9 among Fig. 1;

Among the figure: 1. steel pipe; 2. side steel pipe; 3. stepper motor; 4. upper end cap; 5. transmission shaft; 6. taper pin; 7. preloading spring; 8. the first round plate diaphragm; 9. the second round plate diaphragm; 10. semi-round ring shape hole; 11. draw-in groove hole; 12. circular groove.

Embodiment

Referring to Fig. 1-3; The present invention includes columned steel pipe 1, side steel pipe 2 and upper end cap 4; Upper end cap 4 is installed with the sealing of steel pipe 1 upper end, and upper end cap 4 is identical with the caliber of steel pipe 1, and stepper motor 3 is set in upper end cap 4; Stepper motor 3 connects outside step actuator, by the step actuator drive work of outside.1 fen upper and lower two-part of steel pipe, the caliber on top is greater than the caliber of bottom.Be tightly connected sidewall and its inner chamber of steel pipe 1 of side steel pipe 2 one ends is communicated with the top inner chamber of steel pipe 1.In the pipe on steel pipe 1 top, set gradually transmission shaft 5, preloading spring 7, the first round plate diaphragm 8 and the second round plate diaphragm 9 from top to bottom.The second round plate diaphragm 9 radially is fixedly installed in the pipe of steel pipe 1, stack the first round plate diaphragm, 8, the first round plate diaphragms 8 on the second round plate diaphragm, 9 upper surfaces and the second round plate diaphragm 9 coaxial.Transmission shaft 5 upper ends connect stepper motor 3, and the lower end is fixedly connected the first round plate diaphragm 8 through the draw-in groove hole 11 at the first round plate diaphragm, 8 centers.One taper pin 6 is arranged on the sidewall of transmission shaft 5; Preloading spring 7 is enclosed within on the transmission shaft 5; The first round plate diaphragm 8 is pressed in the lower end of preloading spring 7; The upper end is fixing by taper pin 6, and preloading spring 7 is given 8 one pretightening forces of the first round plate diaphragm, and the first round plate diaphragm 8 can closely be contacted with the second round plate diaphragm 9 all the time.

On the first round plate diaphragm 8, open a semi-round ring shape hole 10; On the second round plate diaphragm 9, drive a circular groove 12; Circular groove 12 is corresponding with the position in semi-round ring shape hole 10; The inner arc radius of circular groove 12 is identical with the inner arc radius in semi-round ring shape hole 10, makes the interior circular arc in circular groove 12 and semi-round ring shape hole 10 overlapping.The both ends open broad of circular groove 12, middle opening are narrower.

When the present invention works; In the vehicle driving process; By the driving cycle parameter (like pressure, vehicle body height etc. in vehicle driving acceleration, the pneumatic spring) of the continuous measuring vehicle of sensor, sensor passes to ECU with its vehicle driving-cycle parameter that records then, and ECU compares computing according to the signal that receives; After the processes such as the signal annular distribution of operation result signal process step actuator, power amplification, last drive stepping motor 3 motions.To show that needs increase main when attaching between the air chamber circulation area when the operation result of ECU; ECU just sends a forward signal; This signal passes to stepper motor 3 after step actuator is handled; Stepper motor 3 drives rotatingshaft 5 according to the pulse signal that receives and rotates counterclockwise, thereby makes the first round plate diaphragm 8 rotate counterclockwise an angle, and the semi-round ring shape hole 10 on such first round plate diaphragm 8 and the coincidence area of the circular groove 12 on the second round plate diaphragm 9 increase; This coincidence area is promptly managed interior actual circulation area, with reference to Fig. 4.So just increased the circulation area between steel pipe 1 and the side steel pipe 2.Otherwise; When the operation result of ECU show need reduce main when attaching between the air chamber circulation area; ECU just sends a reverse signal, and this signal passes to stepper motor 3 after step actuator is handled, and stepper motor 3 drives rotatingshaft 5 according to the pulse signal that receives and clockwise rotates; Thereby make the first round plate diaphragm 8 clockwise rotate an angle; The semi-round ring shape hole 10 on such first round plate diaphragm 8 and the coincidence area of the circular groove 12 on the second round plate diaphragm 9 reduce, and this coincidence area is promptly managed interior actual circulation area, has also just reduced the circulation area between steel pipe 1 and the side steel pipe 2.

Claims

1. An adjustable flow area control valve connecting an air spring and an additional air chamber, including a cylindrical steel pipe (1), a side steel pipe (2) and an upper end cover (4) sealed with the upper end of the steel pipe (1), the side One end of the steel pipe (2) is sealed and connected to the side wall of the steel pipe (1) and communicates with the inner cavity of the upper part of the steel pipe (1). The transmission shaft (5), the pre-tension spring (7), the first round steel plate diaphragm (8) and the second round steel plate diaphragm (9) are set in the tube from top to bottom; the second round steel plate diaphragm (9) It is radially fixed in the tube of the steel pipe (1), and the first round steel plate diaphragm (8) is coaxially stacked on the upper surface of the second round steel plate diaphragm (9); the transmission shaft (5) is covered with a pre-tension spring ( 7), the upper end of the drive shaft (5) is connected to the stepping motor (3), and the lower end is connected to the first round steel diaphragm (8); the lower end of the pre-tightening spring (7) presses against the first round steel diaphragm (8), and the upper end is fixed The conical pin (6) that is provided with on the drive shaft (5) is connected; a semicircular annular hole (10) is established on the first round steel plate diaphragm (8); The position of the hole (10) corresponds to the annular groove (12), and the radius of the inner arc of the annular groove (12) is the same as that of the semicircular annular hole (10).

2. An adjustable flow area control valve connecting the air spring and the additional air chamber according to claim 1, characterized in that: the diameter of the upper part of the steel pipe (1) is larger than the diameter of the lower part; the annular groove ( 12) The openings at both ends are wide and the middle opening is narrow.