CN200992673Y - Paver crawler hydraulic tensioning device - Google Patents
Paver crawler hydraulic tensioning device Download PDFInfo
- Publication number
- CN200992673Y CN200992673Y CN 200620201119 CN200620201119U CN200992673Y CN 200992673 Y CN200992673 Y CN 200992673Y CN 200620201119 CN200620201119 CN 200620201119 CN 200620201119 U CN200620201119 U CN 200620201119U CN 200992673 Y CN200992673 Y CN 200992673Y
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- China
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- tensioning
- line
- valve
- oil cylinder
- crawler
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Abstract
The utility model relates to a hydraulic tensioning devise for the tracks of spreading machine, and is characterized in that a side line is elicited from a main oil line; the side line is connected to an inlet oil line of track tensioning cylinder by a pressure reducing valve; the side line is connected to an inlet oil line of control valve by a liquid control valve; the liquid control hollow of liquid control valve is connected to the inlet oil line of track tensioning cylinder; the outlet end of pressure reducing valve is connected to a one-way valve; the inlet oil line of track tensioning cylinder is connected to an accumulator. The utility model has the advantages of automatic tensioning, enduring and reliable pressure retaining, zero power loss when tensioning, anti-impact, lower cost and etc; which can well keep the tensioning pressures of tracks invariable when the spreading machine works (constant motion).
Description
Technical field
The utility model relates to a kind of paver crawler belt Hydranlic tensioner.
Background technology
At present, be used for crawler belt hydraulic tensioning on the paver nothing more than adopting overflow valve pressurize or two kinds of tensioning forms of butter tensioning.First kind of form needs initiatively voltage supply and consumed power generation heat, and adopts its effect of overflow valve pressurize poorer than the one way valve pressurize.Second kind of form needs regularly beat annotates the butter operation than more complicated and its injection rate and the bad control of pressure when beating notes at every turn, and along with the thrust in the increase butter tensioning apparatus of working time also can change, is unfavorable for that the constant speed of paver is walked.
Summary of the invention
The purpose of this utility model just provides a kind of characteristics such as auto-tensioning, pressurize are reliable lastingly, the loss of tensioning zero energy, protecting against shock, low cost that have, and the suffered tensile force of crawler belt keeps constant paver crawler belt Hydranlic tensioner in the time of can guaranteeing paver work (constant speed walking) well.
Solution of the present utility model is such: lead to bypass on working connection; between bypass and crawler tensioning oil cylinder in-line, be connected with reducing valve; when the in-oil cylinder pressure of crawler tensioning waits other reason to be lower than the pressure of setting because of leakage; the flow of pump output unnecessary flow very first time behind flow stabilizing valve provides sufficient pressure for the crawler tensioning oil cylinder; assurance paver traveling crawler can not protected strainer well because of the under-voltage crawler belt that makes of crawler tensioning oil cylinder gets loose.
Be connected with pilot operated valve device between bypass and the control valve in-line, the liquid controling cavity of pilot operated valve device is communicated with the in-line of crawler tensioning oil cylinder, when control valve is controlled, this hydraulic system can produce one by reducing valve and be higher than the pre-set pressure signal of pilot operated valve device, guarantees that pilot operated valve device is in the state of complete opening.Begin to form a passage by pump like this, avoided the power loss that causes because of the required pressure of tensioning to being in the system that last control valve forms.
Being connected with one way valve at the reducing valve port of export, is in order to guarantee that above-mentioned pressure signal exists once just setting up, and makes pilot operated valve device be in the state of complete opening, and adopted reliable one way valve and soft seal pressurize in this system always.
Being connected with accumulator on crawler tensioning oil cylinder in-line, is in order to replenish unpredictalbe leakage, to have introduced accumulator to increase pressurize and to absorb the impact that brings when paver is walked.
The utility model has the advantages that have auto-tensioning, characteristics such as pressurize is lasting reliable, the loss of tensioning zero energy, protecting against shock, low cost, the suffered tensile force maintenance of crawler belt is constant in the time of can guaranteeing paver work (constant speed walking) well.
Description of drawings
Accompanying drawing is embodiment of the present utility model.
Accompanying drawing 1 is a schematic diagram of the present utility model.
The specific embodiment
The utility model comprises pump 1, flow stabilizing valve 2, reducing valve 3, one way valve 4, pilot operated valve device 5, accumulator 6, crawler tensioning oil cylinder 7, control valve 8.
The outlet of flow stabilizing valve 2 is regime flow A, draws bypass B from flow stabilizing valve 2, is connected with reducing valve 3 between bypass B and crawler tensioning oil cylinder 7 in-lines.
Be connected with pilot operated valve device 5 between bypass B and control valve 8 in-lines, the liquid controling cavity of pilot operated valve device 5 is communicated with the in-line of crawler tensioning oil cylinder 7.
Be connected with one way valve 4 at reducing valve 3 ports of export.
On crawler tensioning oil cylinder 7 in-lines, be connected with accumulator 6.
The course of work of the present utility model is:
The hydraulic oil that pump 1 is exported under Diesel Driven at first enters the flow stabilizing valve 2 of pre-set pressure, and it preferential stable a road has its usefulness in addition, and pilot operated valve device 5 fuel feeding are given in bypass when connecing reducing valve 3 imports.The outlet of reducing valve 3 is provided with one way valve 4 and is used for pressurize, and the pressurize end of reducing valve 4 is connected with the liquid controling cavity of accumulator 6, crawler tensioning oil cylinder 7, pilot operated valve device 5 simultaneously.The outlet of pilot operated valve device 5 connects control valve 8 imports.When the pressure in the crawler tensioning oil cylinder 7 is lower than the pressure of pilot operated valve device 5, pilot operated valve device 5 disconnects the oil circuit of bypass flow direction control valve 8, the bypass that makes flow stabilizing valve 2 by reducing valve to 7 voltage supply of crawler tensioning oil cylinder, because of crawler tensioning oil cylinder 7 communicates with pilot operated valve device 5 liquid controling cavities, so the pressure of crawler tensioning oil cylinder 7 is just controlled the pressure that pilot operated valve device 5 is opened, when this pressure reaches the pressure set points of pilot operated valve device 5, pilot operated valve device 5 can be opened automatically and is communicated with the oil circuit of bypass to control valve 8, stops to 7 voltage supply of crawler tensioning oil cylinder.After pilot operated valve device 5 is opened, handle control valve 8, can in bypass, produce a high pressure, after reducing valve 3 step-downs, to in the airtight oil pocket that accumulator 6 and one way valve 4 are housed, preserve, be used to guarantee the reliable tensioning that continues of holding of crawler tensioning oil cylinder 7, opening pressure be provided for simultaneously pilot operated valve device 5, allow bypass and control valve 8 formation paths.When the pressure in causing crawler tensioning oil cylinder 7 because of various reasons is lower than the setting value of pilot operated valve device 5, can enters said process again automatically and make crawler tensioning oil cylinder 7 recover tensioning state.
Claims (5)
1. a paver crawler belt Hydranlic tensioner leads to bypass (B) on working connection, it is characterized in that being connected with reducing valve (3) between bypass (B) and crawler tensioning oil cylinder (7) in-line.
2. paver crawler belt Hydranlic tensioner according to claim 1 is characterized in that being connected with pilot operated valve device (5) between bypass (B) and control valve (8) in-line, and the liquid controling cavity of pilot operated valve device (5) is communicated with the in-line of crawler tensioning oil cylinder (7).
3. paver crawler belt Hydranlic tensioner according to claim 1 is characterized in that being connected with one way valve (4) at reducing valve (3) port of export.
4. paver crawler belt Hydranlic tensioner according to claim 1 and 2 is characterized in that being connected with accumulator (6) on crawler tensioning oil cylinder (7) in-line.
5. according to claim 1 or 3 described paver crawler belt Hydranlic tensioners, it is characterized in that on crawler tensioning oil cylinder (7) in-line, being connected with accumulator (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620201119 CN200992673Y (en) | 2006-12-27 | 2006-12-27 | Paver crawler hydraulic tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620201119 CN200992673Y (en) | 2006-12-27 | 2006-12-27 | Paver crawler hydraulic tensioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200992673Y true CN200992673Y (en) | 2007-12-19 |
Family
ID=38945748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620201119 Expired - Lifetime CN200992673Y (en) | 2006-12-27 | 2006-12-27 | Paver crawler hydraulic tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200992673Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806076A (en) * | 2010-04-09 | 2010-08-18 | 太原重工股份有限公司 | Crawler tensioning hydraulic control system of hydraulic excavator |
-
2006
- 2006-12-27 CN CN 200620201119 patent/CN200992673Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806076A (en) * | 2010-04-09 | 2010-08-18 | 太原重工股份有限公司 | Crawler tensioning hydraulic control system of hydraulic excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071219 |
|
| EXPY | Termination of patent right or utility model |