JPS579933A - Hydraulic circuit for reduction of noise produced by construction machinery - Google Patents
Hydraulic circuit for reduction of noise produced by construction machineryInfo
- Publication number
- JPS579933A JPS579933A JP8273280A JP8273280A JPS579933A JP S579933 A JPS579933 A JP S579933A JP 8273280 A JP8273280 A JP 8273280A JP 8273280 A JP8273280 A JP 8273280A JP S579933 A JPS579933 A JP S579933A
- Authority
- JP
- Japan
- Prior art keywords
- branch
- reduction
- actuators
- pump
- hoses
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
PURPOSE: To reduce a pulsating pressure of a pump by bringing either a hose or a branch hose into a block state and to prevent the reduction of a mechanical vibration noise, by a method wherein the hose connects together a pump and a control valve, and simultaneously, the branch base joins together the pump and a main relief valve.
CONSTITUTION: When actuators 8 and 9 operated through the operation of control valves 4a and 5a, and when a load applied to the actuators 8 and 9 is low and is lower than a discharge pressure of pumps 2, 3 and a set pressure of main relief valves 12, 13, the main valves 12 and 13 are closed, and branch hoses 18 and 19 are in a block state. Thus, the branch hoses 18 and 19 display a muffler effect. When the load applied to the actuators 8 and 9 is high, the main relief valves 12 and 13 are opened, and rubber hoses 16 and 17 are brought into a block state. As a result, the rubber hoses 16 and 17 display the muffler effect.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8273280A JPS579933A (en) | 1980-06-20 | 1980-06-20 | Hydraulic circuit for reduction of noise produced by construction machinery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8273280A JPS579933A (en) | 1980-06-20 | 1980-06-20 | Hydraulic circuit for reduction of noise produced by construction machinery |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS579933A true JPS579933A (en) | 1982-01-19 |
Family
ID=13782583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8273280A Pending JPS579933A (en) | 1980-06-20 | 1980-06-20 | Hydraulic circuit for reduction of noise produced by construction machinery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS579933A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62101411A (en) * | 1985-10-28 | 1987-05-11 | Tokai Rubber Ind Ltd | Manufacture of rubber bush |
JPS62104717A (en) * | 1985-10-31 | 1987-05-15 | Tokai Rubber Ind Ltd | Preparation of plastic rod with rubber bushing |
-
1980
- 1980-06-20 JP JP8273280A patent/JPS579933A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62101411A (en) * | 1985-10-28 | 1987-05-11 | Tokai Rubber Ind Ltd | Manufacture of rubber bush |
JPH0353092B2 (en) * | 1985-10-28 | 1991-08-14 | Tokai Rubber Ind Ltd | |
JPS62104717A (en) * | 1985-10-31 | 1987-05-15 | Tokai Rubber Ind Ltd | Preparation of plastic rod with rubber bushing |
JPH0353094B2 (en) * | 1985-10-31 | 1991-08-14 | Tokai Rubber Ind Ltd |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY123318A (en) | Compressor arrangement | |
GB2314057A (en) | Hydraulic control arrangement | |
JPS56131802A (en) | Oil hydraulic circuit for slewing drive of construction equipment | |
JPS579933A (en) | Hydraulic circuit for reduction of noise produced by construction machinery | |
JPS57205638A (en) | Oil-pressure circuit for oil-pressure shovel | |
JPS56143857A (en) | Stepless hydraulic transmission device | |
JPS57184749A (en) | Control device for hydraulic system | |
JPS5659003A (en) | Oil pressure controller | |
JPS56159584A (en) | Oil pressure control circuit for construction machine | |
JPS54156985A (en) | Safety device of hydraulic circuit having a plurality of actuators | |
JPS5690101A (en) | Power unit for hydraulic elevator | |
JPS57103906A (en) | Pressure controlling device | |
JPS5776304A (en) | Hydraulic circuit for construction machinery | |
JPS6446001A (en) | Hydraulic elevation control device for tractor and the like | |
JPS5718526A (en) | Hydraulic equipment for dump truck or the like | |
JPS57103964A (en) | Closed circuit type hydraulic circuit | |
JPS5740173A (en) | Spool moving method for counter balance valve and device for the same | |
JPS55145219A (en) | Hydraulic circuit of hydraulic excavator | |
JPS5732080A (en) | Low noise hydraulic equipment | |
JPS57140434A (en) | Oil-pressure circuit for oil-pressure shovel | |
JPS5725502A (en) | Accumulator with automatic closing valve | |
JPS5758739A (en) | Construction machinery such as power shovel | |
JPS579303A (en) | Pressure control circuit for pressure intensifier | |
JPS5761125A (en) | Oil pressure circuit for construction machinery | |
JPS5779306A (en) | Hydraulic circuit |