CN204575249U - A kind of fast adjuster of enclosure space internal rotor amount of unbalance - Google Patents

Abstract

The utility model discloses the fast adjuster of a kind of enclosure space internal rotor amount of unbalance belonging to machine control techniques field.This device comprises rotor, the first displacement transducer, second displacement sensor, controller, removable positioning element, fast applying part, bearing; The first displacement transducer and second displacement sensor is utilized to obtain the vibration signal of rotor, controller calculates position and the size of rotor unbalance value after receiving the vibration signal of rotor, controller sends instructions to removable positioning element and quick applying part, after making removable positioning element accurately move to assigned address along rotor axial, added the size of amount of unbalance to rotor by quick applying part; This device just can realize the quick adjustment of enclosure space internal rotor amount of unbalance without the need to repeated disassembled and assembled rotor.

Description

A kind of fast adjuster of enclosure space internal rotor amount of unbalance

Technical field

The utility model belongs to machine control techniques field, especially relates to a kind of fast adjuster of enclosure space internal rotor amount of unbalance.

Background technology

The parts that rotor rotates when being rotating machinery work, because actual rotor all has amount of unbalance, so because amount of unbalance excitation can produce vibration when rotor rotates.Time under rotor is in critical rotary speed, this vibration may make rotor resonate, or excessive vibration can affect the normal operation of rotor.Therefore, the amplitude how reducing rotor oscillation is vital problem in rotating machinery.

The basic skills reducing rotor oscillation is mass balance approach, the method adopts size and the position experimentally detecting and obtain rotor unbalance value, to increase the weight of or the measure of loss of weight reduces the total amount of unbalance of rotor by adopting, and then the vibratory output reduced when rotor rotates, mass balance approach is widely used in rotor manufacture process.But, adopting when balancing mass balance approach to there are some difficulties for some specific rotors, such as needing repeated disassembled and assembled to carry out increasing the weight of or duplicate removal.For for the rotor run in enclosure space, repeated disassembled and assembled can spend many time and efforts, and repeated disassembled and assembled can cause rotor-support-foundation system mated condition repeatability bad, especially makes fine balance process become difficulty.

The utility model proposes a kind of fast adjuster of enclosure space internal rotor amount of unbalance, this device is built in enclosure space inside, by size and the position of detection rotor amount of unbalance, under the condition of rotor without dismounting, adopt the method increased the weight of to regulate the amount of unbalance of rotor, to realize the quick adjustment of rotor unbalance value.

Utility model content

In order to the adjustment solving current enclosure space internal rotor amount of unbalance needs the deficiency of repeated disassembled and assembled rotor, the utility model proposes a kind of fast adjuster of enclosure space internal rotor amount of unbalance, it is characterized in that, comprise rotor 1, first displacement transducer 2, second displacement sensor 3, controller 4, removable positioning element 5, fast applying part 6, bearing 7; Wherein, rotor 1, first displacement transducer 2, second displacement sensor 3, removable positioning element 5, fast applying part 6, bearing 7 are all installed in enclosure space, axially install and non-contacting first displacement transducer 2 of rotor 1 and second displacement sensor 3 along rotor 1, axially removable positioning element 5 is installed along rotor 1, removable positioning element 5 is provided with quick applying part 6, first displacement transducer 2 is connected with the input end of second displacement sensor 3 with controller 4, and the output terminal of controller 4 is connected with removable positioning element 5 and quick applying part 6.

The beneficial effects of the utility model are, propose a kind of fast adjuster of enclosure space internal rotor amount of unbalance; The first displacement transducer and second displacement sensor is utilized to obtain the vibration signal of rotor, controller calculates position and the size of rotor unbalance value after receiving the vibration signal of rotor, controller sends instructions to removable positioning element and quick applying part, after making removable positioning element accurately move to assigned address along rotor axial, added the size of amount of unbalance to rotor by quick applying part; This device just can realize the quick adjustment of enclosure space internal rotor amount of unbalance without the need to repeated disassembled and assembled rotor.

Accompanying drawing explanation

Fig. 1 is the fast adjuster schematic diagram of enclosure space internal rotor amount of unbalance.

Number in the figure:

1-rotor, 2-first displacement transducer, 3-second displacement sensor, 4-controller, the removable positioning element of 5-, the quick applying part of 6-, 7-bearing.

Embodiment

The utility model proposes a kind of fast adjuster of enclosure space internal rotor amount of unbalance, below in conjunction with the drawings and specific embodiments, the utility model is elaborated.

Figure 1 shows that the fast adjuster schematic diagram of enclosure space internal rotor amount of unbalance, comprise rotor 1, first displacement transducer 2, second displacement sensor 3, controller 4, removable positioning element 5, fast applying part 6, bearing 7; Wherein, rotor 1, first displacement transducer 2, second displacement sensor 3, removable positioning element 5, fast applying part 6, bearing 7 are all installed in enclosure space, axially install and non-contacting first displacement transducer 2 of rotor 1 and second displacement sensor 3 along rotor 1, axially removable positioning element 5 is installed along rotor 1, removable positioning element 5 is provided with quick applying part 6, first displacement transducer 2 is connected with the input end of second displacement sensor 3 with controller 4, and the output terminal of controller 4 is connected with removable positioning element 5 and quick applying part 6.The fast adjuster of a kind of enclosure space internal rotor amount of unbalance that the utility model proposes just can realize the quick adjustment of enclosure space internal rotor amount of unbalance without the need to repeated disassembled and assembled rotor.

Wherein, utilize the first displacement transducer and second displacement sensor to obtain the vibration signal of rotor, the number of displacement transducer is at least 2, installs along rotor axis; Controller calculates position and the size of rotor unbalance value after receiving the vibration signal of rotor, controller sends instructions to removable positioning element and quick applying part, after making removable positioning element accurately move to assigned address along rotor axial, added the size of amount of unbalance to rotor by quick applying part; Removable positioning element, except accurately can moving along rotor axial, can also make rotor remain on given angular position.

As long as rotor rotates always have vibration, the size of its vibration amplitude is except relevant with the unbalance amount of rotor itself, relevant near the critical rotary speed also whether being in rotor with its travelling speed.Under different rotating speeds, the amplitude of a simple rotor can show with following formula table:

$r=\frac{e{\mathrm{\ω}}^2}{\sqrt{{(p^2-{\mathrm{\ω}}^2)}^2+{\left(2\mathrm{\ξ\ω}\right)}^2}}$

Wherein, r is the amplitude of rotor oscillation; E represents the eccentric throw of rotor unbalance value; P is the characteristic frequency of rotor; ω is the angular frequency that rotor rotates; The damping that ξ is subject to when being rotor rotation; When the angular frequency that rotor rotates is close to its characteristic frequency p, rotor resonates, and show as amplitude very large, excessive vibration can destroy rotor-support-foundation system.

Adopt the method for balance can subtract trochantinian amplitude, when carrying out rotor balancing, first need to make rotor to be rotated in a stable angular velocity omega ₀, adopt displacement transducer to obtain the original vibration characteristics of rotor, represent with R0, the original vibration characteristics of rotor comprises original amplitude and corresponding phase place; Then by adding test mass m _tr _tafter again make rotor rotate on angular velocity omega ₀under state, adopt displacement transducer to obtain the new vibration characteristics of now rotor, use R ₁represent, the new vibration characteristics of rotor comprises new amplitude and corresponding phase place; Just U can be calculated by these data ₀, U ₀be a complex vector, represent size and the Angle Position of rotor unbalance value.Concrete calculation procedure is:

First R is calculated _t=R ₁-R ₀, R _tbe complex vector, represent the vibration amplitude and phase place that are caused by test mass separately;

The computing formula of then calculating influence coefficient ε, influence coefficient ε is:

$\mathrm{\ϵ}=\frac{R_T}{m_T{r}_T}$

Finally calculate U ₀, U ₀be a complex vector, represent size and the Angle Position of rotor unbalance value, U ₀computing formula be:

$U_0=\frac{R_0}{\mathrm{\ϵ}}$

The quality m of test mass _tthe position r put in the rotor with test mass _tneed accurately to control.

The fast adjuster of a kind of enclosure space internal rotor amount of unbalance that the utility model proposes is built in enclosure space inside, by size and the position of detection rotor amount of unbalance, under the condition of rotor without dismounting, adopt the method increased the weight of to regulate the amount of unbalance of rotor, the quick adjustment of rotor unbalance value can be realized.

The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims (1)

1. the fast adjuster of an enclosure space internal rotor amount of unbalance, it is characterized in that, comprise rotor (1), the first displacement transducer (2), second displacement sensor (3), controller (4), removable positioning element (5), fast applying part (6), bearing (7), wherein, rotor (1), first displacement transducer (2), second displacement sensor (3), removable positioning element (5), quick applying part (6), bearing (7) is all installed in enclosure space, axially install and non-contacting first displacement transducer (2) of rotor (1) and second displacement sensor (3) along rotor (1), axially removable positioning element (5) is installed along rotor (1), removable positioning element (5) is provided with quick applying part (6), first displacement transducer (2) is connected with the input end of second displacement sensor (3) with controller (4), the output terminal of controller (4) is connected with removable positioning element (5) and quick applying part (6).