CN206299634U - The hydraulic pressure that a kind of excavator is used releases brake valve - Google Patents
The hydraulic pressure that a kind of excavator is used releases brake valve Download PDFInfo
- Publication number
- CN206299634U CN206299634U CN201621425451.0U CN201621425451U CN206299634U CN 206299634 U CN206299634 U CN 206299634U CN 201621425451 U CN201621425451 U CN 201621425451U CN 206299634 U CN206299634 U CN 206299634U
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- valve
- valve body
- valve element
- short
- hydraulic
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Abstract
The utility model provides the hydraulic pressure releasing brake valve that a kind of excavator is used, valve element long and short valve element are provided with valve body, valve element one end long is located at the working oil porch on valve body, valve body top is provided with hydraulic oil inlet, short valve element one end is located in hydraulic fluid flow paths, valve element long is provided with valve core spring long, short valve element is provided with short valve core spring, brake piston connector on hydraulic circuit connection valve body, short valve element is provided with throttle orifice, throttle orifice connects fuel tank connector, and valve body is cast iron valve body, and valve body side is provided with big plug screw and small plug screw for blocking hydraulic circuit.The hydraulic pressure that excavator of the present utility model is used releases brake valve, can stablize throttle orifice flow, and then avoids increasing the impact to system suddenly due to flow when releasing braking and performing braking.
Description
Technical field
The utility model is related to hydraulic valve field, more particularly, to the hydraulic valve technical field of excavator control.
Background technology
Hydraulic throttle valve is to reduce hydraulic fluid flow rate by reducing the sectional area of hydraulic circuit, and then meets hydraulic system not
Same demand.The pressure differential at throttle orifice two ends determines the hydraulic fluid flow rate for flowing through throttle orifice, and pressure differential is bigger, then flow through throttling
Pore pressure force is bigger.Throttle orifice instability of flow, can change with the change of throttle orifice pressure at two ends difference, releasing braking and performing
During braking, flow increases suddenly can produce impact to system.
Utility model content
The purpose of this utility model is to provide the hydraulic pressure releasing brake valve that a kind of excavator is used, and stablizes throttle orifice flow,
It is avoided to change so as to produce the problem of impact to system with the change of throttle orifice pressure at two ends difference.
The technical scheme that the utility model is used to achieve the above object is：The hydraulic pressure that a kind of excavator is used releases system
Dynamic valve, is provided with valve element long 2 and short valve element 4 in valve body 1, the one end of valve element long 2 is located at the work oil-in SH on valve body 1, valve body 1
Top is provided with hydraulic oil inlet PG, and the one end of short valve element 4 is located in hydraulic fluid flow paths 8, and valve element long 2 is provided with valve core spring long 3, short
Valve element 4 is provided with short valve core spring 5, and the brake piston connector A on the connection valve body 1 of hydraulic circuit 8, short valve element 4 is provided with section
Discharge orifice, throttle orifice connection fuel tank connector B.
The valve body 1 is cast iron valve body, and the side of valve body 1 is provided with big plug screw 7 and small plug screw 6 for blocking hydraulic circuit 8.
The hydraulic pressure that excavator of the present utility model is used releases brake valve, can stablize throttle orifice flow, and then avoid
When releasing braking and performing braking, increase the impact to system suddenly due to flow.
Brief description of the drawings
Fig. 1 is that the hydraulic pressure that the utility model excavator is used releases brake valve sectional structure chart.
Fig. 2 is that the hydraulic pressure that the utility model excavator is used releases brake valve schematic diagram.
In figure：1st, body, 2, valve element long, 3, valve core spring long, 4, short valve element, 5, short valve core spring, 6, small plug screw, 7, big
Plug screw, 8, hydraulic circuit, SH, work oil-in, PG, hydraulic oil inlet, A, brake piston connector, B, fuel tank connector.
Specific embodiment
The hydraulic pressure that excavator of the present utility model is used releases brake valve and applies in excavator revolution operation, and structure is as schemed
Shown in 1, cast iron valve body 1, other each elements are all placed in this valve body.Valve element long 2 and short valve element 4, valve long are provided with valve body 1
The one end of core 2 is located at the work oil-in SH on valve body 1, and the top of valve body 1 is provided with hydraulic oil inlet PG, and the one end of short valve element 4 is located at
In hydraulic fluid flow paths 8, valve element long 2 is provided with valve core spring long 3, and short valve element 4 is provided with short valve core spring 5, and hydraulic circuit 8 is connected
Brake piston connector A on valve body 1, short valve element 4 is provided with throttle orifice, throttle orifice connection fuel tank connector B, the side of valve body 1
It is provided with the big plug screw 7 and small plug screw 6 for blocking hydraulic circuit 8.
Principle is as shown in Fig. 2 when releasing braking, guide's working oil enters work oil-in SH, there is provided release the liquid of braking
Pressure signal pressure.Hydraulic fluid pressure acts on valve element long 2, and valve core spring long 3 is compressed, and valve element long 2 is moved down, hydraulic circuit
8 open.Hydraulic oil is entered by hydraulic oil inlet PG, through too short valve element 4, flows into brake piston connector A.Brake piston connector
A connects brake piston, and brake piston releases braking.
When performing braking, the hydraulic oil for flowing to work oil-in SH is cut off, and pushes the hydraulic pressure signal pressure quilt of valve element long 2 open
Cut-out, valve core spring long 3 resets, and is cut off to the hydraulic oil inlet PG loops of brake piston supply hydraulic fluid.Brake piston connects
The hydraulic oil of interface A flows slowly into B mouthfuls by the throttle orifice of short valve element 4, and B mouthfuls of connection fuel tank, brake piston slowly resets.
Regulation oil drain quantity effect when throttle orifice can play pressure change on short valve element 4.When acting on the liquid on short valve element 4
When oil pressure increases, short valve core spring 5 is compressed, short valve element 4 is moved down, and short valve element 4 diminishes with the B mouthfuls of throttle orifice being connected.
Although pressure increases, choke area diminishes, and flowing through restriction hydraulic oil will not increase and increase with pressure, can allow braking
Piston slowly resets.
Claims (2)
1. the hydraulic pressure that a kind of excavator is used releases brake valve, it is characterised in that：Valve body（1）Inside it is provided with valve element long（2）With short valve
Core（4）, valve element long（2）One end is located at valve body（1）On work oil-in（SH）Place, valve body（1）Top is provided with hydraulic oil inlet
（PG）, short valve element（4）One end is located at hydraulic fluid flow paths（8）It is interior, valve element long（2）It is provided with valve core spring long（3）, short valve element（4）
It is provided with short valve core spring（5）, hydraulic circuit（8）Connection valve body（1）On brake piston connector（A）, short valve element（4）On set
There are throttle orifice, throttle orifice connection fuel tank connector（B）.
2. the hydraulic pressure that a kind of excavator according to claim 1 is used releases brake valve, it is characterised in that：The valve body
（1）It is cast iron valve body, valve body（1）Side is provided with for blocking hydraulic circuit（8）Big plug screw（7）With small plug screw（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621425451.0U CN206299634U (en) | 2016-12-23 | 2016-12-23 | The hydraulic pressure that a kind of excavator is used releases brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621425451.0U CN206299634U (en) | 2016-12-23 | 2016-12-23 | The hydraulic pressure that a kind of excavator is used releases brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206299634U true CN206299634U (en) | 2017-07-04 |
Family
ID=59205398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621425451.0U Active CN206299634U (en) | 2016-12-23 | 2016-12-23 | The hydraulic pressure that a kind of excavator is used releases brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206299634U (en) |
-
2016
- 2016-12-23 CN CN201621425451.0U patent/CN206299634U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |