CN102900798B - Damping pad and apply the single phase motor mounting structure of this damping pad - Google Patents
Damping pad and apply the single phase motor mounting structure of this damping pad Download PDFInfo
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- CN102900798B CN102900798B CN201210403291.XA CN201210403291A CN102900798B CN 102900798 B CN102900798 B CN 102900798B CN 201210403291 A CN201210403291 A CN 201210403291A CN 102900798 B CN102900798 B CN 102900798B
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Abstract
The invention discloses a kind of mainly through isolating motor tangential vibrations to weaken the damping pad of equipment acoustic noise and to apply the single phase motor mounting structure of this damping pad, the pad of described damping pad comprises the first vibration damping section and the second vibration damping section that are positioned at middle vibration isolation section and lay respectively at vibration isolation section two ends, the internal diameter of internal diameter > two vibration damping sections of vibration isolation section, the excircle of vibration isolation section is provided with circular groove, the length of the width≤vibration isolation section of circular groove, described single phase motor mounting structure, comprise for the motor leg of damping pad and band mounting hole is fixed to connecting bolt on installation foundation and supporting fastening piece thereof, circular groove snap-fit engagement on the mounting hole of motor leg and damping pad, the through hole of damping pad and connecting bolt Spielpassung, under tightening state, damping pad axially has movable gap delta, this mounting structure effectively can reduce all kinds of vibrations of single phase motor, reduce running noises, can apply on all kinds of daily-use electrical appliance series products.
Description
Technical field
The present invention relates to a kind of shock-absorbing mounting structure, especially a kind of shock-absorbing mounting structure of daily-use electrical appliance motor.
Background technique
At present, in daily-use electrical appliance, single-phase asynchronous motor uses and popularizes very much, for the vibration of such motor and the research of noise a lot, but in actual applications due to motor machining accuracy, the restriction of the factors such as the batch difference of rotor material, cause single-phase asynchronous motor in use very easily to occur vibration noise problem, especially low-frequency noise remains a great problem in industry.
The vibration of single phase motor is primarily of axial vibration, radial vibration and tangential vibrations composition, and axis and radial vibration are comparatively large, and tangential vibrations is less.Tangential vibrations is very little to motor itself, but it is mainly by connecting or the fixing outside transmitting vibrations of component, thus radiation quadratic noise, and use the daily-use electrical appliance of asynchronous single phase motor, many uses panel beating thin-walled parts is as electric machine support or fixed plate, therefore the tangential vibrations of motor is easy to be delivered to the sheet metal part be attached thereto, and panel beating even can be caused to resonate, give off the noise being better than motor several times.
At present, the installation of single-phase asynchronous motor mainly contains two kinds, level is installed and is vertically installed, in order to ensure the stability operated when level is installed, use hard link more, vertical installation generally have employed vibration reducing measure, but only increases the rubber pad of a simple shape at motor leg, and effectiveness in vibration suppression is generally very undesirable.
Summary of the invention
In order to overcome the still larger deficiency of existing single phase motor operational noise, technical problem to be solved by this invention is to provide a kind of mainly through isolating motor tangential vibrations to weaken the damping pad of equipment acoustic noise and to apply the single phase motor mounting structure of this damping pad.
First the present invention devises a kind of damping pad for solving this technical problem.
Damping pad, comprise the pad with through hole, along the axial direction of described through hole, pad comprises the first vibration damping section and the second vibration damping section that are positioned at middle vibration isolation section and lay respectively at vibration isolation section two ends, the internal diameter of the internal diameter > first vibration damping section of vibration isolation section, the internal diameter of the internal diameter > second vibration damping section of vibration isolation section, the excircle of vibration isolation section is provided with circular groove, the length of the width≤vibration isolation section of circular groove.
The external diameter of the external diameter < second vibration damping section of described first vibration damping section.
The internal diameter of the internal diameter=the second vibration damping section of the first vibration damping section.
It is below the technological scheme of the single phase motor mounting structure of application of aforementioned damping pad.
Single phase motor mounting structure, comprise for the motor leg of damping pad and band mounting hole is fixed to connecting bolt on installation foundation and supporting fastening piece thereof, circular groove snap-fit engagement on the mounting hole of motor leg and damping pad, the through hole of damping pad and connecting bolt Spielpassung, under tightening state, damping pad axially has movable gap delta.
Described connecting bolt comprises the bolt head of screw rod and screw rod one end, and screw rod comprises polished rod section and thread section, and bolt head is fixedly connected with installation foundation, forming station terrace between polished rod section and thread section.
Described single phase motor is that level is installed, and the theoretical value δ '=A-L-d=0.2 ~ 0.5mm of described movable gap delta, wherein, A is the distance of bolt head to step surface, and d is the degree of depth of bolt through-hole on installation foundation, and L is the axial length of damping pad.
Described single phase motor is that level is installed, and the material of described damping pad is shore hardness at the butyl rubber of 45 ~ 50 degree.
Described single phase motor is at right angle setting, the theoretical value δ '=A-L-d=0.5 ~ 0.7mm of described movable gap delta.
Described single phase motor is at right angle setting, and the material of described damping pad is shore hardness at the butyl rubber of 40 ~ 45 degree.
The bolt head of described connecting bolt welds with installation foundation.
The invention has the beneficial effects as follows: utilize damping pad and the connecting bolt with special construction, and the auxiliary hardness controlling rubber pad and the gap coordinated with connecting bolt thereof, can effectively reduce single phase motor axial vibration, radial vibration is delivered to installation foundation, and the tangential vibrations of motor can be isolated, significantly reduce the vibration & noise of the unit with single phase motor, improve unit sound quality, can apply on all kinds of daily-use electrical appliance series products.
Accompanying drawing explanation
Fig. 1 is the plan view of damping pad in the present invention.
Fig. 2 is the plan view of connecting bolt in the present invention.
Fig. 3 is the plan view of Fig. 2.
Fig. 4 is the plan view of single phase motor mounting structure of the present invention.
Fig. 5 is the noise pattern applying conventional mounting structure in embodiment.
Fig. 6 is the noise pattern applying mounting structure of the present invention in embodiment.
Be labeled as in figure, 1-connecting bolt, 2-installation foundation, 3-damping pad, 4-motor leg, 5-flat gasket, 6-resilient pad, 7-nut, 11-bolt head, 12-screw rod, 13-step surface, 14-convex closure, 121-polished rod section, 122-spiro rod section, 30-through hole, 31-first vibration damping section, 32-vibration isolation section, 33-second vibration damping section, 34-circular groove, 40-mounting hole, the external diameter of D1-first vibration damping section, the internal diameter of φ 1-first vibration damping section, the external diameter of D2-circular groove position vibration isolation section, the internal diameter of φ 2-vibration isolation section, the external diameter of D3-second vibration damping section, the internal diameter of φ 3-second vibration damping section, the length of A-polished rod section, δ-gap, the axial length of L-damping pad, d-installation foundation thickness.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
In single phase motor mounting structure, the vibration of motor is delivered on connecting bolt 1 by motor leg 4, thus be delivered on installation foundation 2, causes the vibration of installation foundation 2, give off quadratic noise.
As Fig. 1, shown in Fig. 4, damping pad of the present invention comprises the pad with through hole 30, along the axial direction of described through hole 30, pad comprises the first vibration damping section 31 and the second vibration damping section 33 being positioned at middle vibration isolation section 32 and laying respectively at vibration isolation section 32 two ends, the internal diameter φ 1 of the internal diameter φ 2 > first vibration damping section 31 of vibration isolation section 32, the internal diameter φ 3 of the internal diameter φ 2 > second vibration damping section 33 of vibration isolation section 32, the excircle of vibration isolation section 32 is provided with circular groove 34, the length of the width≤vibration isolation section 32 of circular groove 34, the function and efficacy of its corresponding construction will lay down a definition in the single phase motor mounting structure introduced below and illustrate.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the single phase motor mounting structure of the present invention of application of aforementioned damping pad comprises for the motor leg 4 by damping pad 3 and band mounting hole 40, be fixed to the connecting bolt 1 on installation foundation 2 and supporting fastening piece thereof, mounting hole 40 and circular groove 34 snap-fit engagement on damping pad 3 of motor leg 4, through hole 30 and connecting bolt 1 Spielpassung of damping pad 3, under tightening state, damping pad 3 axially has movable gap delta.
As seen from Figure 4, the through hole 30 of damping pad 3 of the present invention is variable-diameter structure small in ends and broad in the middle, this damping pad 3 structural key is φ 2 > φ 1 and φ 2 > φ 3, during assembling, first motor leg 4 is snapped in the circular groove 34 on damping pad 3, circular groove 34 is for locating motor leg 4, this snaps in the thinnest position of radial direction that position is also damping pad 3, and the gap herein between damping pad 3 with connecting bolt 1 is larger than the corresponding gap of upper and lower parts.When driven by motor load rotates, tangential moment of torsion will be produced, because of the length of the width≤vibration isolation section 32 of circular groove 34, on guaranteeing that position that first damping pad 3 and connecting bolt 1 contact is, lower portion, vibration on motor leg 4 directly can not be delivered to connecting bolt 1 from the thinnest position of damping pad 3, so damping pad stage casing is called " vibration isolation section ", vibration can only be transmitted by upper and lower position, vibration is when being transmitted by damping pad 3, because damping pad 3 damping is large, vibrational energy major part when transmitting is converted to thermal energy consumption and falls, so by damping pad epimere, hypomere is called " vibration damping section ", as seen from Figure 4, the energy that the axial vibration of motor and radial vibration are delivered to installation foundation 2 by " vibration damping section " significantly weakens, under tightening state, damping pad 3 axially has movable gap delta, damping pad 3 has certain mobility, the tangential vibrations of motor is cut off by the damping pad 3 with certain degrees of freedom in transmittance process, thus reduce the vibration & noise of the unit with single phase motor, improve unit sound quality.
By adopting said structure, the vibration passing of motor is controlled effectively, and the sheet metal part simultaneously solved usually used as installation foundation is connected rear because vibration radiation goes out the problem of quadratic noise with motor.
From the firm installation of motor and the angle of noise reduction demand balance, movable gap delta should be as far as possible little under the prerequisite being greater than 0.
In usual design, the polished rod diameter of the screw rod of bolt is constant, for the tangential moment of torsion when dynamic load of balance motor band rotates, recommend the internal diameter φ 3 of the internal diameter φ 1=second vibration damping section 33 of the first vibration damping section 31, namely in the upper and lower parts of circular groove 34 snapping in motor leg 4, gap between damping pad 3 with connecting bolt 1 is equal, and after assembling, motor leg 4 snaps in the gap comparatively large 0.5 ~ 0.75mm in gap, top and the bottom between position damping pad 3 and connecting bolt 1.
The preferably outer diameter D 3 of the outer diameter D 1 < second vibration damping section 33 of described first vibration damping section 31, thus be convenient to from first vibration damping section 31 one end, motor leg 4 be snapped in, during assembling, first vibration damping section 31 one end is arranged on apart from the nearer side of nut 7.
Described movable gap delta can be formed during for guaranteeing fastening, particularly, as shown in Figure 4, described connecting bolt 1 comprises the bolt head 11 of screw rod 12 and screw rod 12 one end, screw rod 12 comprises polished rod section 121 and thread section 122, the bolt head 11 of connecting bolt 1 is fixedly connected with installation foundation 2, forming station terrace 13 between polished rod section 121 and thread section 122, namely connecting bolt 1 is stepped, the diameter M of thread section 122 is less than the diameter D of polished rod section 121, suggestion D=M+2mm, spacing as during tightening nut 7 of step surface 13, under tightening state, just movable gap delta can be formed between described damping pad 3 and described step surface 13.
For improving the effectiveness in vibration suppression of aforementioned single phase motor mounting structure, also can in conjunction with size, the weight of embody rule environment as motor, the thickness, material etc. of installation foundation 2 are tested, the material of choose reasonable damping pad 3 and hardness, according to issuable cumulative error in manufacture and assembly process, choose reasonable is carried out to size relationship every in assembly structure.According to the limited experimentation of inventor, inventor recommends:
If when single phase motor is for vertically installing, the hardness suggestion of damping pad 3 is shore hardness 40 ~ 45 degree, if when single phase motor is level installation, the hardness suggestion of damping pad 3 is shore hardness 45 ~ 50 degree.
During vertical installation, the theoretical value δ ' suggestion of movable gap delta is 0.5 ~ 0.7mm, when level is installed, the theoretical value δ ' suggestion of movable gap delta is 0.2 ~ 0.5mm, the length A=L+d+ δ of the polished rod section 121 of connecting bolt 1 can be obtained thus, wherein, L is the axial length of damping pad, and d is the degree of depth of bolt through-hole on installation foundation.
For ensureing the stability of motor rotation and being convenient to assembling, should meet between the diameter D of the polished rod section 121 of damping pad 3 aperture φ 1 and connecting bolt 1: internal diameter φ 1+(1 ~ 1.5 of the internal diameter φ 2=first vibration damping section 31 of the second vibration damping section 32) mm, φ 1=D+(0.2 ~ 0.5) mm; The internal diameter φ 3 of the internal diameter φ 1=second vibration damping section 33 of the first vibration damping section 31,
For ease of maintenance dismounting, the bolt head 11 of preferred described connecting bolt 1 is provided with convex closure 14 and welds with installation foundation 2.
Embodiment:
The fan electromotor that single phase motor mounting structure of the present invention is applied to certain embedded air-conditioner is installed, this fan electromotor is provided with four motor legs of distributed rectangular, be arranged on thin panel beating plate, motor is vertically install, and damping pad material have selected the large butyl rubber of damping.
As shown in Figure 1 to 4, each motor leg 4 of this single phase motor all by damping pad 3 of the present invention, the connecting bolt 1 that fixed electrical machinery is used, and supporting fastening piece: special plain cushion 5, bullet pad 6, nut 7 are connected with installation foundation 2.The pad of damping pad comprises the first vibration damping section 31 and the second vibration damping section 33 being positioned at middle vibration isolation section 32 and laying respectively at vibration isolation section 32 two ends, the internal diameter φ 3 of the internal diameter φ=the second vibration damping section 33 of the internal diameter φ 2 > first vibration damping section 31 of vibration isolation section 32, the excircle of vibration isolation section 32 is provided with circular groove 34, the length of the width≤vibration isolation section 32 of circular groove 34, connecting bolt 1 comprises bolt head 11 and screw rod 12, screw rod 12 comprises polished rod section 121 and thread section 122, forming station terrace 13 between polished rod section 121 and thread section 122, the end face of one end that bolt head 11 is connected with screw rod 12 is provided with three convex closures 14, bolt head 11 is convenient to weld with the panel beating plate as installation foundation 2, ensure during welding that bolt 1 is vertical with panel beating plate, after welding, convex closure 14 melts, it can be thought of as machining error to the impact of polished rod section 121 length, loaded by motor leg 4 in the circular groove 34 of damping pad 3, damping pad 3 is inserted in connecting bolt 1, load onto special plain cushion 5, bullet pad 6, nut 7 is also fastening.
Carry out the noise test of above-mentioned mounting structure, to determine the hardness of size relationship in mounting structure, damping pad, said structure is optimized further, chooses the value with optimum noise reduction.For adjustment and the theoretical value δ ' determining movable gap delta, finally determine that the theoretical value δ ' of movable gap delta is 0.5 ~ 0.7mm.
This theoretical value δ ' also can be described as theoretical gap, mainly in order to make up the parts of mounted motor at forming parts, the cumulative error caused in component processing process, this error is the assembly error of motor in assembly process, be difficult to by means of testing the size determining cumulative error, therefore only have by testing unit vibration and equipment acoustic noise determines this mistake extent after being assembled into complete machine.Concrete grammar be size by adjusting theoretical value δ ' ensure unit vibration and noise subjective assessment qualified.The means taked at present form expert team by the professional and technical personnel of vibration & noise aspect, by background noise 16dB (A) semianechoic room on-the-spot test below, carry out subjective assessment marking respectively to indices.Following table 1 is subjective assessment table.
Table 1 subjective assessment table
Note: 1, h0 representation theory gap is that to represent theoretical gap be 0.1 millimeter to 0, h1, h2 ... h10 representation theory gap is 0.2 ... 1 millimeter.
2, air-flow comfort level comprises the sensation of air-flow sound size, air-flow wind direction, stationarity and sound purity.
3, evaluate score value by total score 100 points calculatings, total score more than 75 points and individual event is greater than more than 50% is substantially qualified, total score is more than 80 points and individual event is qualified more than 60%, and total score is at 90 points and individual event is good more than 80%; Total score is more than 95 points and individual event is outstanding more than 90%.
Fig. 5 and Fig. 6 is that before and after adopting the present invention, embedded air-conditioner noise spectrum compares.As can be seen from the figure, reduce about 8dB (A) at 100Hz place noise figure, subjective feeling is that low frequency hum disappears, and subjective assessment is good, and unit sound quality significantly promotes.
Install if single phase motor is level, the confirmation method in theoretical gap etc. can adopt and vertically install identical confirmation method, does not repeat them here.The confirmation method of damping pad hardness also can use the method, hardness adjustment is from shore 35 °, every 5 ° of adjustment once, finally determine that hardness is more suitable at 45 ° ~ 50 °, the quality of the damping property of certain damping pad 3 itself is not single relevant with hardness, and the impact of its structural type on effectiveness in vibration suppression is even more important.
Claims (6)
1. apply the single phase motor mounting structure of damping pad, comprise damping pad (3), the motor leg (4) being with mounting hole (40), installation foundation (2), connecting bolt (1) and the fastening piece supporting with connecting bolt (1);
It is characterized in that: damping pad (3) comprises the pad with through hole (30), along the axial direction of described through hole (30), pad comprises the first vibration damping section (31) and the second vibration damping section (33) that are positioned at middle vibration isolation section (32) and lay respectively at vibration isolation section (32) two ends, the internal diameter of vibration isolation section (32)
the internal diameter of > first vibration damping section (31)
the internal diameter of vibration isolation section (32)
the internal diameter of > second vibration damping section (33)
the excircle of vibration isolation section (32) is provided with circular groove (34), the length of the width≤vibration isolation section (32) of circular groove (34);
Connecting bolt (1) comprises the bolt head (11) of screw rod (12) and screw rod (12) one end, screw rod (12) comprises polished rod section (121) and bolt section (122), forming station terrace (13) between polished rod section (121) and thread section (122);
The screw rod (12) of connecting bolt (1) is successively through installation foundation (2) and through hole (30), the bolt head (11) of connecting bolt (1) is fixedly connected with installation foundation (2), and fastening piece is connected with thread section (122) and fits with step surface (13);
Damping pad (3) to be positioned between fastening piece and motor leg (4) and axially to have movable gap delta, theoretical value the δ '=A-L-d of movable gap delta, wherein, A is the length of polished rod section (121), d is the degree of depth of the upper bolt through-hole of installation foundation (2), and L is the axial length of beam (3);
Mounting hole (40) and circular groove (34) snap-fit engagement on damping pad (3) of motor leg (4), through hole (30) and connecting bolt (1) Spielpassung of beam (3).
2. the single phase motor mounting structure of application damping pad as claimed in claim 1, is characterized in that: described single phase motor is that level is installed, the theoretical value δ '=0.2 ~ 0.5mm of described movable gap delta.
3. the single phase motor mounting structure of application damping pad as claimed in claim 1, is characterized in that: described single phase motor is that level is installed, and the material of described damping pad (3) is shore hardness at the butyl rubber of 45 ~ 50 degree.
4. the single phase motor mounting structure of application damping pad as claimed in claim 1, is characterized in that: described single phase motor is at right angle setting, the theoretical value δ '=0.5 ~ 0.7mm of described movable gap delta.
5. the single phase motor mounting structure of application damping pad as claimed in claim 1, is characterized in that: described single phase motor is at right angle setting, and the material of described damping pad (3) is shore hardness at the butyl rubber of 40 ~ 45 degree.
6. the single phase motor mounting structure of application damping pad as claimed in claim 1, is characterized in that: the bolt head (11) of described connecting bolt (1) welds with installation foundation (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210403291.XA CN102900798B (en) | 2012-10-22 | 2012-10-22 | Damping pad and apply the single phase motor mounting structure of this damping pad |
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| CN201210403291.XA CN102900798B (en) | 2012-10-22 | 2012-10-22 | Damping pad and apply the single phase motor mounting structure of this damping pad |
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| CN102900798A CN102900798A (en) | 2013-01-30 |
| CN102900798B true CN102900798B (en) | 2015-08-19 |
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- 2012-10-22 CN CN201210403291.XA patent/CN102900798B/en active Active
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| DE8905538U1 (en) * | 1988-05-10 | 1989-08-17 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Mounting device for a blower motor |
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