CN202730831U - Constant-power hydraulic system - Google Patents
Constant-power hydraulic system Download PDFInfo
- Publication number
- CN202730831U CN202730831U CN 201220343918 CN201220343918U CN202730831U CN 202730831 U CN202730831 U CN 202730831U CN 201220343918 CN201220343918 CN 201220343918 CN 201220343918 U CN201220343918 U CN 201220343918U CN 202730831 U CN202730831 U CN 202730831U
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- CN
- China
- Prior art keywords
- load
- hydraulic system
- power hydraulic
- reversing valve
- proportional multi
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a constant-power hydraulic system, which comprises a motor, a variable displacement pump and a load-sensitive proportional multi-way reversing valve. The motor is connected with the variable displacement pump. The variable displacement pump is connected with the load-sensitive proportional multi-way reversing valve through a pipe. Feedback pressure oil is filled in the pipe. A cutoff ball valve is arranged on the pipe. The constant-power hydraulic system has the advantages that the structure is simple, the system is convenient to operate and a backhoe loader is enabled to be in a safe state when the backhoe loader is in a non-working state.
Description
Technical field
The utility model relates generally to the loader-digger field, relates in particular to a kind of permanent power hydraulic system.
Background technology
The permanent power hydraulic system that present domestic loader-digger hydraulic system adopts load-sensitive proportional multi-path reversing valve and variable pump to form mostly.When system under nonproductive duty, because the effect of load feedback, the variable pump off-load, but motor still turns round, if the at this moment operating control handle generation maloperation on the load-sensitive proportional multi-path reversing valve then hydraulic actuator will be worked, as seen such system does not take effective measures and prevents maloperation, and safety does not enough ensure.
The utility model content
The utility model purpose is exactly in order to remedy the defective of prior art, a kind of permanent power hydraulic system to be provided.
The utility model is achieved through the following technical solutions:
Permanent power hydraulic system, include motor, variable pump, load-sensitive proportional multi-path reversing valve, described motor connects with variable pump, variable pump is connected by pipeline with the load-sensitive proportional multi-path reversing valve, be feedback pressure oil in the pipeline, it is characterized in that: described pipeline is provided with a cut-off ball valve.
Principle of the present utility model is:
Between the feedback pressure oil circuit of load-sensitive proportional multi-path reversing valve and variable pump, add a cut-off ball valve, with the break-make of control feedback pressure oil circuit.When cutting off feedback pressure oil circuit pressure oil, variable pump is in unloading condition all the time, the hydraulic operation control elements such as handle on the load-sensitive proportional multi-path reversing valve are in failure state at this moment, even generation maloperation, hydraulic actuator can not worked yet, and so just can reach Cinder Machine and be in a safe condition under nonproductive duty.
The utility model has the advantages that:
The utility model is simple in structure, easy to operate, so that loader-digger is in a safe condition under nonproductive duty.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, permanent power hydraulic system, include motor 1, variable pump 2, load-sensitive proportional multi-path reversing valve 3, motor 1 connects with variable pump 2, variable pump 2 is connected by pipeline 5 with load-sensitive proportional multi-path reversing valve 4, be feedback pressure oil in the pipeline 5, pipeline 5 is provided with a cut-off ball valve 3.
Between load-sensitive proportional multi-path reversing valve 4 and variable pump 2 feedback pressure oil circuits, add a cut-off ball valve 3, with the break-make of control feedback pressure oil circuit.When cutting off feedback pressure oil circuit pressure oil, variable pump 2 is in unloading condition all the time, the hydraulic operation control elements such as handle on the load-sensitive proportional multi-path reversing valve 4 are in failure state at this moment, even generation maloperation, hydraulic actuator can not worked yet, and so just can reach loader-digger and be in a safe condition under nonproductive duty.
Claims (1)
1. permanent power hydraulic system, include motor, variable pump, load-sensitive proportional multi-path reversing valve, described motor connects with variable pump, variable pump is connected by pipeline with the load-sensitive proportional multi-path reversing valve, be feedback pressure oil in the pipeline, it is characterized in that: described pipeline is provided with a cut-off ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343918 CN202730831U (en) | 2012-07-16 | 2012-07-16 | Constant-power hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343918 CN202730831U (en) | 2012-07-16 | 2012-07-16 | Constant-power hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202730831U true CN202730831U (en) | 2013-02-13 |
Family
ID=47656544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220343918 Expired - Fee Related CN202730831U (en) | 2012-07-16 | 2012-07-16 | Constant-power hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202730831U (en) |
-
2012
- 2012-07-16 CN CN 201220343918 patent/CN202730831U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150716 |
|
| EXPY | Termination of patent right or utility model |