CN201344082Y

CN201344082Y - Efficient forklift air intake eliminator

Info

Publication number: CN201344082Y
Application number: CNU200820170356XU
Authority: CN
Inventors: 徐征宇; 隆康
Original assignee: Zhejiang Hangcha Imp&expco Ltd
Current assignee: Hangcha Group Co Ltd
Priority date: 2008-12-18
Filing date: 2008-12-18
Publication date: 2009-11-11
Anticipated expiration: 2018-12-18

Abstract

The utility model relates to an efficient forklift air intake eliminator. The technical problem to be solved by the utility model is to provide the efficient forklift air intake eliminator and aims to enable an air intake system of a forklift to further achieve the function of silencing against noise generated during the operation of an engine in addition to the air filtering function, enable the air intake system to have good silencing performance within a wide frequency range simultaneously and enable the air intake system of the forklift to be more compact without making big changes on other parts structurally. The technical scheme for solving the problem is as follows: the efficient forklift air intake eliminator is characterized in that an air intake silencer is connected at an inlet end of an air filter of the air intake system of the forklift. The efficient forklift air intake eliminator can be used for 1-5t internal combustion counter balanced forklift trucks.

Description

High-effect fork truck air inlet air separator

Technical field

The utility model relates to a kind of high-effect fork truck air inlet air separator.Be applicable to the 1-5t internal combustion counterbalance forklift truck.

Background technique

The gas handling system of existing common diesel fork lift truck is made up of suction tude 1, air-strainer 2, engine air inlet tube 3, sees Fig. 1, Fig. 2 for details.Air is by the air intake window that is arranged on the vehicle frame, by the vehicle frame gas-entered passageway, enter suction tude 1, enter air-strainer 2 through suction tude 1 then, through after the filtering of air-strainer, the air of cleaning enters engine air inlet tube 3, enters engine chamber through engine air inlet tube, with fuel mix burning back outputting power.Can produce induction noise during engine operation, mainly be fundamental frequency noise and the each harmonic noise thereof that comprises that the stream pressure fluctuation produces in the admission line, and the eddy current crack that produces when the air valve channel cross-section with high speed flow of air-flow.The gas handling system of common diesel fork lift truck is based on the air filtering function, and the induction noise that produces during to engine operation does not have noise elimination function basically.

Summary of the invention

The technical problems to be solved in the utility model is: a kind of high-effect fork truck air inlet air separator is provided, be intended to make the gas handling system of fork truck except having the air filtering function, the function that the induction noise that produces when also having at engine operation is eliminated the noise, should be able in very wide frequency range, all have simultaneously good acoustic attenuation performance is very arranged, in configuration aspects, should make the gas handling system of fork truck compact more, other parts be need not to do big change.

The technological scheme that the utility model adopted is: high-effect fork truck air inlet air separator is characterized in that inlet termination one intake silencer at the air filtering gas of fork truck gas handling system.

Described intake silencer is made of expansion chamber and the sound absorbing material that is attached at the expansion chamber inwall, this expansion chamber is the bicavate variable section structure, the connecting end of expansion chamber and vehicle frame gas-entered passageway is big cavity, and expansion chamber and air filtering gas connecting end are little cavitys, between two cavitys by chamfered transition.

The beneficial effects of the utility model are: the suction tude that 1) has replaced former common diesel fork lift truck gas handling system with intake silencer, the gas handling system that makes fork truck except having the air filtering function, the function that the induction noise that produces when also having at engine operation is eliminated the noise; 2) intake silencer adopts impedance complex formula structure, combines the characteristics of reactive muffler and dissipative muffler, all has good acoustic attenuation performance in very wide frequency range; 3) by the design of bicavate variable cross section, when further improving the noise elimination effect, also more help the layout of fork truck gas handling system, make the fork truck air intake system structure compact more.

Description of drawings

Fig. 1 is the plan view of the utility model background technique.

Fig. 2 is the plan view of the utility model background technique.

Fig. 3 is a plan view of the present utility model.

Fig. 4 is a plan view of the present utility model.

Fig. 5 is the plan view of intake silencer in the utility model.

Fig. 6 is the plan view of intake silencer in the utility model.

Fig. 7 is the A-A sectional view of Fig. 5.

Fig. 8 is the B-B sectional view of Fig. 6.

Fig. 9 is a stereogram of the present utility model.

Embodiment

As shown in Figure 3, Figure 4, present embodiment is made up of air filtering gas 2, engine air inlet tube 3 and intake silencer 4, in the entry end connection intake silencer 4 of air filtering gas 2, the outlet end sending and receiving motivation suction tude 3 of air filtering gas.

As Fig. 5, Fig. 6, Fig. 7, Fig. 8, shown in Figure 9, described intake silencer 4 is made of expansion chamber 4-1 and the sound absorbing material 4-2 that is attached at the expansion chamber inwall, this expansion chamber is the bicavate variable section structure, the connecting end of expansion chamber and vehicle frame gas-entered passageway is big cavity 4-3, and be shaped on air inlet pipe 4-1-1, expansion chamber and air filtering gas 2 connecting ends are loculus body 4-4, and are shaped on air outlet slit pipe 4-1-2, between big cavity and the little cavity by the chamfered transition (see figure 8).

This routine working principle is, air is by the air intake window that is arranged on the vehicle frame, by the vehicle frame gas-entered passageway, enter intake silencer 4, enter air-strainer 2 through intake silencer then, through after the filtering of air-strainer, the air of cleaning enters engine air inlet tube 3, enter engine chamber through engine air inlet tube, with fuel mix burning back outputting power.

Described intake silencer 4 mainly is made up of the expansion chamber 4-1 and the sound-absorbing material 4-2 of molding and forming, sound-absorbing material and expansion chamber inwall good bond, air is flowed into by inlet duct 4-1-1, the expansion chamber of flowing through and sound-absorbing material, flow out through outer pipe 4-1-2, expansion chamber is carried out effective attenuation by the big or small centering low-frequency noise of control acoustic reactance, and sound-absorbing material carries out effective attenuation by the vibration of air in the hole and fiber to high-frequency noise.This silencing apparatus adopts impedance complex formula structure, combines the characteristics of reactive muffler and dissipative muffler, and expansion chamber and sound-absorbing material are combined, and all has good acoustic attenuation performance in very wide frequency range.

In addition, this intake silencer has adopted the design of bicavate variable cross section, when further improving the noise elimination effect, also more helps the layout of fork truck gas handling system, and air-strainer need not to carry out big change, makes the fork truck air intake system structure compact more.

Claims

1, a kind of high-effect fork truck air inlet air separator is characterized in that: at inlet termination one intake silencer (4) of the air filtering gas (2) of fork truck gas handling system.

2, high-effect fork truck air inlet air separator according to claim 1, it is characterized in that: described intake silencer (4) is made of expansion chamber (4-1) and the sound absorbing material (4-2) that is attached at the expansion chamber inwall, this expansion chamber is the bicavate variable section structure, the connecting end of expansion chamber and vehicle frame gas-entered passageway is big cavity (4-3), expansion chamber and air filtering gas (2) connecting end are little cavity (4-4), between two cavitys by chamfered transition.