CN210531263U - Speed regulating valve for excavator - Google Patents
Speed regulating valve for excavator Download PDFInfo
- Publication number
- CN210531263U CN210531263U CN201920769427.6U CN201920769427U CN210531263U CN 210531263 U CN210531263 U CN 210531263U CN 201920769427 U CN201920769427 U CN 201920769427U CN 210531263 U CN210531263 U CN 210531263U
- Authority
- CN
- China
- Prior art keywords
- control valve
- filter
- seat
- spring
- disk seat
- 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 governing valve for excavator, a serial communication port, including control case, control case locates the front portion of disk seat inner chamber, control case's the outer periphery and the inner wall periphery precision fit of disk seat, disk seat inner chamber's rear end is equipped with the spring holder, the spring holder links to each other with the one end of spring, the other end of spring is connected with control case's rear end, the inner chamber front end of disk seat is equipped with the drill way, drill way department is equipped with the filter, disk seat inner chamber front end and the face of cylinder interference fit of filter rear end are equipped with an oil gallery on the disk seat at least. The utility model discloses a compact structure, adopt the crest line sealed, the seal good, and be equipped with filter equipment in oil inlet department, reduced the phenomenon that the case card went on, it is good to have pressure stability simultaneously, receives the characteristics that the main control valve influences for a short time to the working life of main control valve and the stationarity of excavator system work have been guaranteed.
Description
Technical Field
The utility model relates to a hydraulic control valve especially relates to a governing valve for excavator, belongs to hydraulic means technical field.
Background
The speed regulating valve for the main control valve of the excavator is mainly used for controlling the working flow of a hydraulic system and protecting the stability and reliability of the whole hydraulic system. Because the working environment of the excavator is severe, and operators do not pay attention to maintenance and other reasons, the cleanliness of hydraulic oil is often low, and the anti-pollution capacity of the speed regulating valve in the prior art is poor, so that the hydraulic system is unstable in working, the action amplitude fluctuation is large, and the excavator cannot work normally.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the problem of how to improve the antipollution ability of speed governing valve for hydraulic system job stabilization, the start-stop characteristic is good, and it is little influenced by main control valve pressure oscillation is solved.
In order to solve the technical problem, the technical scheme of the utility model a speed governing valve for excavator is provided, a serial communication port, including control valve core, control valve core locates the front portion of disk seat inner chamber, control valve core's the outer periphery and the inner wall periphery of disk seat are accurate to be cooperated, disk seat inner chamber's rear end is equipped with the spring holder, the spring holder links to each other with the one end of spring, the other end of spring is connected with control valve core's rear end, the inner chamber front end of disk seat is equipped with the drill way, drill way department is equipped with the filter, disk seat inner chamber front end and the face of cylinder interference fit of filter rear end, be equipped with an oil gallery.
Preferably, the front end of the spring seat and the rear end of the control valve core are both provided with a groove, and two ends of the spring are respectively arranged in the grooves of the spring seat and the control valve core.
Preferably, the outer circumferential surface of the spring seat is in clearance fit with the rear end of the inner cavity of the valve seat.
Preferably, the end face of the shaft shoulder of the filter is tightly matched with the front end face of the valve seat.
Preferably, the oil return holes are uniformly distributed on the valve seat in the radial direction.
Preferably, an oil inlet is formed in the filter, and a second check ring and a second O-shaped sealing ring are arranged outside the valve seat and between the oil inlet and the oil return hole.
Preferably, a first check ring and a first O-shaped sealing ring which are used for sealing with the main control valve body are arranged outside the valve seat.
Preferably, the front end of the control valve core is at least provided with a conical surface which is used for matching with the hole at the rear end of the filter to form a line seal.
Preferably, the filter is provided with a filter screen, and the filter screen is fixed on the shell of the filter through press-fit riveting.
The utility model discloses a compact structure, adopt the crest line sealed, the seal good, and be equipped with filter equipment in oil inlet department, reduced the phenomenon that the case card went on, it is good to have pressure stability simultaneously, receives the characteristics that the main control valve influences for a short time to the working life of main control valve and the stationarity of excavator system work have been guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a speed regulating valve for an excavator.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The utility model relates to a governing valve for excavator, as shown in fig. 1, it includes control valve core 6, control valve core 6 locates the front portion of 1 inner chamber of disk seat, control valve core 6's the outer periphery and the inner wall periphery precise fit of 1 inner chamber of disk seat, the rear end of 1 inner chamber of disk seat is located to spring holder 4, the outer periphery of spring holder 4 and the rear end clearance fit of 1 inner chamber of disk seat, spring 5's one end links to each other with spring holder 4, the other end links to each other with control valve core 6's rear end, the orifice department of 1 inner chamber front end of disk seat is located to filter 9, the face of cylinder and the 1 inner chamber front end of disk seat of filter 9 rear end are interference fit, the shaft shoulder terminal surface of filter 9 closely. The valve seat 1 is provided with at least one oil return hole T which is radially and uniformly distributed on the valve seat 1, a second check ring 7 and a second O-shaped sealing ring 8 are arranged between an oil inlet P and the oil return hole T which are positioned at the filter 9 outside the valve seat 1, and a first check ring 2 and a first O-shaped sealing ring 3 are arranged outside the valve seat 1 to seal the valve body of the main control valve.
The front end of the control valve core 6 is provided with a throttling hole and a conical surface, and the conical surface is matched with the rear end orifice of the filter 9 to form a linear seal. The front end of the control valve core 6 is provided with at least one conical surface. The front end of spring holder 4 and the rear end of control valve core 6 all are equipped with the recess, and the recess of spring holder 4 and control valve core 6 is located respectively at the both ends of spring 5. The filter cloth in the filter 9 is fixed to the housing of the filter 9 by press riveting.
In this embodiment, two oil return holes T are provided on the valve seat 1; two conical surfaces are arranged at the front end of the control valve core 6.
The utility model discloses a work use as follows:
when the control valve core 6 works, the control valve core 6 is tightly matched with the filter 9 under the action of the spring 5, at the moment, the oil return hole T and the rear end of the control valve core 6 are in a connected state, high-pressure oil reaches the oil return hole T from an oil inlet P through a throttling hole at the front end of the control valve core 6, when the pressure at the oil inlet P is larger than the sum of the elastic force of the spring 5 and the pressure at the oil return hole T, the high-pressure oil pushes the control valve core 6 to move backwards, the connected area of the oil return hole T and the control valve core 6 is reduced, the pressure at the inner cavity of the control valve core 6 is increased, when the sum of the elastic force of the spring 5 and the pressure at the oil return hole T is larger than the pressure at the oil inlet P, the control valve core 6 moves forwards, the connected area of the oil return hole T and the control valve core 6.
Claims (9)
1. The utility model provides a speed governing valve for excavator, a serial communication port, including control valve core (6), the front portion of disk seat (1) inner chamber is located in control valve core (6), the outer periphery of control valve core (6) and the inner wall periphery precision fit of disk seat (1), the rear end of disk seat (1) inner chamber is equipped with spring holder (4), spring holder (4) link to each other with the one end of spring (5), the other end of spring (5) is connected with the rear end of control valve core (6), the inner chamber front end of disk seat (1) is equipped with the drill way, drill way department is equipped with filter (9), disk seat (1) inner chamber front end and the face of cylinder interference fit of filter (9) rear end, be equipped with one oil gallery (T) on disk seat (1) at least.
2. The speed regulating valve for the excavator as claimed in claim 1, wherein the front end of the spring seat (4) and the rear end of the control valve core (6) are provided with grooves, and the two ends of the spring (5) are respectively arranged in the grooves of the spring seat (4) and the control valve core (6).
3. A speed valve for excavator according to claim 1, wherein the outer circumferential surface of said spring seat (4) is in clearance fit with the rear end of the inner cavity of the valve seat (1).
4. A speed valve for excavators according to claim 1, characterized in that the shoulder end face of the filter (9) is fitted closely to the front end face of the valve seat (1).
5. A speed valve for excavators according to claim 1, characterized in that the oil return holes (T) are radially and evenly distributed in the valve seat (1).
6. The speed regulating valve for the excavator as claimed in claim 1, wherein the filter (9) is provided with an oil inlet (P), and a second retaining ring (7) and a second O-ring (8) are arranged outside the valve seat (1) and between the oil inlet (P) and the oil return hole (T).
7. The speed regulating valve for the excavator as claimed in claim 1, wherein a first retainer ring (2) and a first O-shaped sealing ring (3) for sealing with the main control valve body are arranged outside the valve seat (1).
8. A speed valve for excavator according to claim 1, characterized in that the front end of the control valve core (6) is provided with at least one conical surface for forming line seal with the hole at the rear end of the filter (9).
9. A speed valve for excavators according to claim 1, characterized in that the filter (9) is provided with a screen, and the screen is fixed to the outer shell of the filter (9) by press-fit riveting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769427.6U CN210531263U (en) | 2019-05-27 | 2019-05-27 | Speed regulating valve for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769427.6U CN210531263U (en) | 2019-05-27 | 2019-05-27 | Speed regulating valve for excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210531263U true CN210531263U (en) | 2020-05-15 |
Family
ID=70593992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920769427.6U Expired - Fee Related CN210531263U (en) | 2019-05-27 | 2019-05-27 | Speed regulating valve for excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210531263U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242631A (en) * | 2019-05-27 | 2019-09-17 | 龙工（上海）精工液压有限公司 | Excavator speed governing valve |
-
2019
- 2019-05-27 CN CN201920769427.6U patent/CN210531263U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242631A (en) * | 2019-05-27 | 2019-09-17 | 龙工（上海）精工液压有限公司 | Excavator speed governing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 |