CN2154945Y

CN2154945Y - Low structural noise driving gear of diesel-electric set

Info

Publication number: CN2154945Y
Application number: CN 93225090
Authority: CN
Inventors: 张泉南; 孙良贵; 陶龙海; 赵嘉良; 乐开仕
Original assignee: Shanghai Marine Diesel Engine Research Institute
Current assignee: Shanghai Marine Diesel Engine Research Institute
Priority date: 1993-01-20
Filing date: 1993-01-20
Publication date: 1994-02-02
Anticipated expiration: 2003-01-20

Abstract

The utility model relates to a low structural noise driving gear of a diesel-electric set, which is composed of a vibration isolator and a middle raft body. The middle raft body is a composite structure that a steel frame is added with partial polymer concrete; an embedded steel plate and the steel frame on the middle raft valve are not directly connected in rigid method but are connected by the polymer concrete; among the set, the middle raft body and the basis, the completely elastic connection is adopted; therefore, the vibration isolation effect of the low structural noise driving gear of a diesel-electric set has larger improvement. Due to the fact that the middle raft body serves the steel frame as the main body, and only a small amount of polymer concrete is used, the middle raft body has high intensity, easy fabrication, and low cost.

Description

Low structural noise driving gear of diesel-electric set

The utility model relates to the low construct noise transfer unit of a kind of diesel generating set, but it belongs to the vibration insulation and noise reduction device and the device of power equipment extensive use.

At present, the domestic and international diesel generating set of producing, institute adopts the double-deck middle raft body that props up isolation mounting: mainly contain all-polymer concrete structure and all steel welded structure and add two kinds of forms of damping processing.These two kinds of forms are that the damping of non-perfect elasticity linkage structure is little between the middle raft body of latter's structure and unit and the basis, so its noise reduction is relatively poor; The former makes relatively difficulty, costs an arm and a leg, and intensity is also relatively poor, uses to promote to be subjected to certain restriction.

In order to overcome the problem of above-mentioned existence, the purpose of this utility model is to make perfect elasticity " insulation " between unit, middle raft body and the basis, is directly rigid of transmission of power that it is good to become vibration isolating effect, simple in structure, the diesel generating set of low cost hangs down the construct noise transfer unit.

The utility model is the low construct noise transfer unit of a kind of diesel generating set, is made up of diesel generating set and low construct noise transfer unit.Low construct noise transfer unit comprises: the upper and lower layers rubber vibration isolator, compostie damp is regulated pad, bolt and middle raft body.Middle raft body is by steelframe, gives and bury steel plate and install as on the lower floor vibration isolator position in steelframe, is furnished with the composite structure that the high damping polymer-concrete is made; Give and bury steel plate and be embedded in the high damping polymer-concrete, and do not contact with steelframe, the upper and lower layers rubber vibration isolator buries steel plate and is connected with giving with bolt; Compostie damp is regulated pad and upper and lower layers rubber vibration isolator, is taken up in order of priority to be nested with on bolt.Steelframe is made of the channel-section steel welding, is provided with a plurality of chambeies of watering the high damping polymer-concrete in steelframe.On the top and bottom of high damping polymer-concrete, the upper and lower layers rubber vibration isolator is housed respectively.Public base places on the rubber vibration isolator of upper strata.

The utility model is the low construct noise transfer unit of a kind of diesel generating set, the under-chassis of its unit by upper strata rubber vibration isolator and complex group Buddhist nun regulate pad be connected in the middle of the raft body the high damping polymer-concrete on give and burying above the steel plate, be i.e. the direct rigid of transmission of power.The weight of raft body in the middle of the mass ratio r=: during unit weight=0.4-0.6, its effect expense is than the highest.The upper and lower layers vibration isolator is selected for use, adopts best ratio of rigidity according to theory of vibration isolation

, and the minimum natural frequency of decision secondary vibrating isolation system is than β min.Middle raft body is the composite structure that steelframe adds local polymer-concrete, during promptly to the middle raft body steelframe built, give when imbedding the part and watering polymer-concrete, connect giving of upper and lower layers vibration isolator and bury steel plate, this gives the steelframe that buries steel plate and middle raft body is not directly to be rigidly connected, but the polymer-concrete connection, be that pad is regulated in upper strata rubber vibration isolator and damping, bear unit weight and the unit of decaying significantly enter in the middle of the vibrational energy of raft body, lower floor's rubber vibration isolator bears the weight of unit and middle raft body, and with middle raft body further decay unit import into the basis vibrational energy.The utility model be the vibration isolating effect acceleration of double-layer vibration isolating device always shake the level drop greater than 40dB.Thereby realized the elastic damping connection.

The utility model compared with the prior art, its advantage is: owing to realized between unit, middle raft body and the basis that the perfect elasticity damping connects, the unit disturbing force can not be directly by the steelframe transmission, but is transmitting in big damping nonmetallic material.Because transmission loss is bigger, vibration isolating effect is good preferably thereby reach.Simultaneously, of the present utility model simple in structure, low cost is promoted the use of so be beneficial to.

The utility model can also obtain further instruction from following examples and accompanying drawing.

Fig. 1 is a general illustration of the present utility model.

Fig. 2 is the A-A cross-sectional schematic of Fig. 1.

Fig. 3 is second embodiment's general illustration of the present utility model.

The drawing numbering:

The 1-diesel generating set, 2,8-upper and lower layers rubber vibration isolator, the 3-compostie damp is regulated pad, and 4,7-gives and bury steel plate, 5-high damping polymer-concrete, 6-steelframe, 9-basis, 10-public base, 11-acoustic hood.

Below in conjunction with drawings and Examples, the utility model is described in detail.

The utility model hangs down the construct noise transfer unit with the diesel generating set of fishing box rigid joint.It is made up of diesel generating set 1 and low construct noise transfer unit, middle raft body is the composite structure that steelframe 6 adds high damping polymer-concrete 5, steelframe 6 is made by welding such as channel-section steels, in steelframe 6, establish 10 chambeies altogether, and all water in each chamber high damping polymer-concrete 5 is arranged, on the high damping polymer-concrete 5 in 4 chambeies in the middle of above the steelframe 6, compostie damp all is housed regulates pad 3 and upper strata rubber vibration isolator 2, its end face is connected with the under-chassis of unit 1, and the bottom surface with imbed in the middle of giving in the high damping polymer-concrete 5 of raft body bury steel plate 4 and link to each other; Below 6 high damping polymer-concretes 5 in steelframe 6 outsides, respectively adorn lower floor's rubber vibration isolator 8, its end face places on the basis 9 with the high-damping rubber vibration isolator 8 of imbedding middle raft body.And lower floor's rubber vibration isolator 8, up to supporting unit 1 and the weight of middle raft body and the effect of attenuating structure noise.Screw is screwed into to give and buries on the steel plate 7.When building steel structure centre raft body, to give and bury steel plate 4,7 and give and imbedding in the high damping polymer-concrete 5, giving the steelframe 6 that buries steel plate 4,7 and middle raft body is not directly to be rigidly connected, but connect with the high damping polymer, realize that promptly the perfect elasticity damping connects, again compostie damp is regulated pad 3 and upper and lower layers

rubber vibration isolator

2,8, be taken up in order of priority to be sleeved on the bolt.Acoustic hood 11 flexibly is connected on the steelframe 6, and unit 1 is in the hermetically sealed chamber of acoustic hood 11 and steelframe 6 formations, prevents that to greatest extent unit airborne noise and construct noise are to environmental radiation.This is embodiment 1.

Embodiment 2, and present embodiment also has a kind of low construct noise transfer unit of diesel generating set that has public base 10.Unit diesel engine and alternator shaft resilient connection, its under-chassis is rigidly fixed on the public base 10 with double-screw bolt, and public base 10 is packed on the upper strata rubber vibration isolator 2, and like this, its upper strata rubber vibration isolator 2 is installed on the high damping polymer-concrete 5 of middle raft body.The structure connection of all parts of other of present embodiment etc., fully identical with first embodiment.

Claims

1, the low construct noise transfer unit of a kind of diesel generating set, formed by diesel generating set and low construct noise transfer unit, it is characterized in that: low construct noise transfer unit comprises: upper and lower layers rubber vibration isolator (2), (8), and compostie damp is regulated pad (3), bolt and middle raft body; Middle raft body by steelframe (6), give and bury steel plate (4), (7) and in steelframe (6), install on lower floor's vibration isolator (2), (8) position, be furnished with the composite structure that high damping polymer-concrete (5) is made; Give and bury steel plate (4), (7) are embedded in the high damping polymer-concrete (5), and do not contact with steelframe (6), upper and lower layers rubber vibration isolator (2), (8) with bolt with give bury steel plate (4), (7) are connected; Compostie damp adjusting pad (3) and upper and lower layers rubber vibration isolator (2), (8) are taken up in order of priority to be nested with on bolt.

2, the low construct noise transfer unit of diesel generating set according to claim 1, it is characterized in that: also have public base (10), this public base (10) places on the upper strata rubber vibration isolator (2).

3, the low construct noise transfer unit of diesel generating set according to claim 1, it is characterized in that: steelframe (6) is made of the channel-section steel welding, is provided with a plurality of chambeies of watering high damping polymer-concrete (5) in steelframe (6).

4, the low construct noise transfer unit of diesel generating set according to claim 1 is characterized in that: on the top and bottom of high damping polymer-concrete (5), upper and lower layers rubber vibration isolator (2), (8) are housed respectively.