CN109159670B

CN109159670B - Electric eddy speed damper

Info

Publication number: CN109159670B
Application number: CN201810969404.XA
Authority: CN
Inventors: 孙国强; 宋青健
Original assignee: Qizhou Electric Co ltd
Current assignee: Qizhou Electric Co ltd
Priority date: 2018-08-23
Filing date: 2018-08-23
Publication date: 2021-07-13
Anticipated expiration: 2038-08-23
Also published as: CN109159670A

Abstract

The invention belongs to the field of automobile auxiliary braking, and particularly relates to an eddy current retarder which comprises a rotor assembly, a stator assembly, a support assembly, rotor discs, a data acquisition part and a control part, wherein the distance between the two rotor discs is adjusted according to the speed of a vehicle to adjust the braking torque of the eddy current retarder, and then the adjustment is corrected according to the gradient of a road surface. The eddy current retarder adjusts the distance between the two rotor sub-discs according to the running speed of an automobile and the road surface gradient value, and achieves the purposes of reducing power consumption and saving electric energy on the premise of ensuring the braking effect.

Description

Electric eddy speed damper

Technical Field

The invention belongs to the field of automobile auxiliary braking, and particularly relates to an eddy current retarder.

Background

The eddy current retarder is a commonly used auxiliary braking device, and a control mode of a sub-gear is usually adopted, and usually, an intervention time or a gear of eddy current braking is selected according to an actual braking condition, for example, a patent combined braking system eddy current retarder controller and a control method of Zhejiang university (refer to patent CN102120424B), a patent commercial vehicle integrated braking system sub-working condition braking force distribution optimization method of Jilin university (refer to patent CN105292092B), a patent new energy commercial vehicle non-contact combined retarding braking system of Wuhan university (refer to patent CN104527438B), and a patent of Jiangsu university, which are eddy current retarders capable of automatically adjusting air gaps and a control method thereof (refer to patent CN 104578687B).

Disclosure of Invention

The invention provides an eddy current retarder with an adjustable hardware structure, which can be adaptively adjusted based on actual use environment so as to reduce power consumption and save electric energy on the premise of ensuring the braking effect.

An eddy current retarder comprises a rotor assembly, a stator assembly and a bracket assembly, wherein,

the rotor assembly comprises a rotor disc, a data acquisition part and a control part,

the rotor disk comprises a first sub disk and a second sub disk, the first sub disk is connected with the second sub disk through the rotor disk adjusting assembly, and in an initial state, the distance between the first sub disk and the second sub disk is a first distance value d₁；

The rotor disk adjustment assembly comprises:

the telescopic rod is a hollow cylinder, the inner wall of the telescopic rod is provided with internal threads, one end of the telescopic rod is fixed on the first sub-disc, and the other end of the telescopic rod is connected with a screw rod with external threads;

the motor is connected with the end part of the screw rod and fixed on the second sub-disc, the screw rod is driven to rotate through the rotation of the motor, the telescopic rod is made to reciprocate along the axial direction of the screw rod, the distance between the first sub-disc and the second sub-disc is changed, and a torque calculation formula is used

It can be known that an increase in the distance between the first sub-disc and the second sub-disc results in an increase in the braking torque of the eddy current retarder;

the data acquisition part comprises:

a speed sensor for detecting a running speed V of the automobile;

an angle sensor for detecting a gradient value α of a road surface;

the distance sensor is arranged at the intersection of the first sub-disc and the telescopic rod and used for detecting the distance d between the first sub-disc and the second sub-disc;

when the driving speed V of the automobile is less than the standard speed value V₀When the distance between the first sub-disc and the second sub-disc is kept at the first distance value d₁The change is not changed;

when the driving speed V of the automobile is greater than the standard speed value V₀When the distance sensor detects that the distance d between the first sub-disc and the second sub-disc is equal to the second distance value d₂When the motor is stopped, the motor is controlled to stop rotating, wherein the second distance value d₂>First distance value d₁；

And correcting the adjustment according to the slope value alpha of the road surface detected by the angle sensor: when the gradient value alpha of the road surface is larger than the standard gradient value alpha₀The above-mentioned adjustment, which changes the distance between the first and the second sub disc to the second distance value, is not sufficient to brake the car safely, which means that the road surface is relatively steep, and therefore,and increasing the distance between the first subdisc and the second subdisc value by 10 to 20 percent on the basis of the second distance value.

The invention has the beneficial effects that: the invention adjusts the distance between the two rotor sub-discs according to the driving speed of the automobile and the road slope value, and achieves the purposes of reducing power consumption and saving electric energy on the premise of ensuring the braking effect.

Drawings

FIG. 1 shows a schematic diagram of an eddy current retarder configuration;

FIG. 2 is a schematic diagram showing the variation of the spacing between two rotor sub-discs;

fig. 3 shows a control block diagram of an eddy current retarder.

Detailed Description

The structure of the present system and the functions performed are described in detail below with reference to the accompanying drawings.

An eddy current retarder is formed by connecting a rotor assembly, a stator assembly and a bracket assembly, wherein the rotor assembly comprises a rotor disc 1, a data acquisition part 2 and a control part 3, and the control part 3 controls the rotor disc 3 to perform corresponding adjustment according to information acquired by the data acquisition part 2;

wherein,

the rotor disk 1 comprises:

a first sub-disc 11 connected to a second sub-disc 13 by a rotor disc adjusting assembly 12, wherein an initial distance value between the first sub-disc 11 and the second sub-disc 13 is a first distance value d₁；

A rotor disk adjustment assembly 12, comprising:

the telescopic rod 121 is a hollow cylinder, the inner wall of the telescopic rod is provided with internal threads, one end of the telescopic rod is fixed on the first sub-disc 11, and the other end of the telescopic rod is in threaded connection with one end of the screw rod 122 with external threads;

the motor 123 is connected with the other end of the screw 122 and fixed on the second sub-disc 13, and drives the screw 122 to rotate through rotation of the motor, so that the telescopic rod 121 reciprocates along the axial direction of the screw 122, and thus the distance between the first sub-disc 11 and the second sub-disc 13 changes, and the braking torque of the eddy current retarder changes;

the data acquisition unit 2 includes:

a speed sensor 21 for detecting a running speed V of the automobile;

an angle sensor 22 for detecting a gradient value α of the road surface;

a distance sensor 23, which is arranged at the intersection of the first sub-disc 11 and the telescopic rod 121, and is used for detecting the distance d between the first sub-disc 11 and the second sub-disc 13;

the control section 3 is configured to:

when the driving speed V of the automobile is less than the standard speed value V₀At this time, the distance between the first subdisc and the second subdisc maintains the initial distance value d₁Invariably, when the driving speed V of the automobile is greater than the standard speed value V₀When the distance sensor detects that the distance d between the first sub-disc and the second sub-disc is equal to the second distance value d₂When the motor stops rotating, d₂>d₁；

Correcting the distance between the first sub-disc and the second sub-disc to be adjusted according to the slope value alpha of the road surface detected by the angle sensor, and when the slope value alpha of the road surface is larger than the standard slope value alpha₀When the road surface is steep, the distance between the first sub-disc and the second sub-disc to be adjusted is not enough to safely brake the automobile, so that the distance between the first sub-disc and the second sub-disc is increased by 10-20%.

It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiments without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Likewise, the invention encompasses any combination of features, in particular of features in the patent claims, even if this feature or this combination of features is not explicitly specified in the patent claims or in the individual embodiments herein.

Claims

1. An eddy current retarder comprises a rotor assembly, a stator assembly and a bracket assembly, and is characterized in that,

The rotor disk adjustment assembly comprises:

the motor is connected with the end part of the screw rod and fixed on the second sub-disc, and drives the screw rod to rotate through the rotation of the motor, so that the telescopic rod reciprocates along the axial direction of the screw rod, the distance between the first sub-disc and the second sub-disc is changed, and the braking torque of the eddy current retarder is changed;

the data acquisition part comprises:

a speed sensor for detecting a running speed V of the automobile;

an angle sensor for detecting a gradient value α of a road surface;

when the driving speed V of the automobile is greater than the standard speed value V₀The control motor is controlled to rotate to drive the screw rod to rotate, so that the telescopic rod moves along the axis direction of the telescopic rod, and when the distance sensor detects the distance between the first sub-disc and the second sub-discD is equal to a second distance value d₂When the motor is stopped, the motor is controlled to stop rotating, wherein the second distance value d₂>First distance value d₁；

And correcting the adjustment according to the slope value alpha of the road surface detected by the angle sensor: when the gradient value alpha of the road surface is larger than the standard gradient value alpha₀When the road surface is steep, the adjustment for changing the distance between the first sub-disc and the second sub-disc to the second distance value is not enough for safely braking the automobile, so that the distance between the first sub-disc and the second sub-disc is increased by 10-20% on the basis of the second distance value.