CN217926511U - Pitching flow matching hydraulic system for heading machine arm - Google Patents
Pitching flow matching hydraulic system for heading machine arm Download PDFInfo
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- CN217926511U CN217926511U CN202221984103.2U CN202221984103U CN217926511U CN 217926511 U CN217926511 U CN 217926511U CN 202221984103 U CN202221984103 U CN 202221984103U CN 217926511 U CN217926511 U CN 217926511U
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Abstract
The utility model discloses a hydraulic system is matchd to entry driving machine arm every single move flow. The hydraulic control system comprises a constant-pressure variable pump, a hydraulic reversing valve, a first electric proportional switch valve, a second electric proportional switch valve, an arm frame pitching left oil cylinder and an arm frame pitching right oil cylinder, wherein an oil outlet of the constant-pressure variable pump is connected with an oil inlet of the hydraulic reversing valve, the first electric proportional switch valve is connected with a left control oil port of the hydraulic reversing valve, the second electric proportional switch valve is connected with a right control oil port of the hydraulic reversing valve, and a first driving oil port of the hydraulic reversing valve is connected with an arm frame pitching left oil cylinder rod cavity oil port and an arm frame pitching right oil cylinder rod cavity oil port. The control input end of the controller is respectively connected with the control input ends of the first electric proportional switch valve and the second electric proportional switch valve, and the control output end of the controller controls the constant-pressure variable pump; the controller receives input signals from the first electric proportional switch valve and the second electric proportional switch valve and sends control signals to the constant-pressure variable pump based on the input signals.
Description
Technical Field
The utility model relates to a hydraulic system design field, concretely relates to entry driving machine arm every single move flow matches hydraulic system.
Background
The pitching control system of the arm of the heading machine is a control system suitable for controlling the arm of the heading machine, and is used for matching corresponding system flow according to different speed requirements of the arm of the heading machine aiming at the construction condition of the heading machine.
Most of existing excavator arm pitching control systems are connected with a shuttle valve oil inlet through an arm frame electric proportional multi-way valve LS oil port and a manual reversing multi-way valve, a shuttle valve oil outlet is connected with a constant-pressure variable pump LS oil port, the shuttle valve is selected according to load pressures of the manual reversing multi-way valve and the arm frame electric proportional multi-way valve, pressure signals are specially transmitted into the constant-pressure variable pump and output flow is adjusted through pressure selection of the shuttle valve, however, the control process of signal transmission and feedback according to signals is too long in the mode, the problem that the action of an execution oil cylinder is delayed is caused, and certain defects exist.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a hydraulic system is matchd to entry driving machine arm every single move flow solves owing to change hydraulic pressure regulation constant voltage variable pump flow, makes signal transmission and makes the control process time overlength of feedback according to the signal, causes the hysteretic problem of execution cylinder action.
For solving the above technical problem, the technical scheme of the utility model as follows:
a roadheader arm pitch flow matching hydraulic system, comprising: a constant pressure variable pump, a hydraulic reversing valve, a first electric proportional switch valve, a second electric proportional switch valve, a boom pitching left oil cylinder, a boom pitching right oil cylinder and a controller,
the oil outlet of the constant-pressure variable pump is connected with the oil inlet of the hydraulic reversing valve;
the first electric proportional switch valve is connected with the left control oil port of the hydraulic reversing valve;
the second electric proportional switch valve is connected with the right control oil port of the hydraulic reversing valve;
a first driving oil port of the hydraulic reversing valve is connected with an oil port of a rod cavity of the arm frame pitching left oil cylinder and an oil port of a rod cavity of the arm frame pitching right oil cylinder; a second driving oil port of the hydraulic reversing valve is connected with an oil port of a rodless cavity of the arm support pitching left oil cylinder and an oil port of a rodless cavity of the arm support pitching right oil cylinder;
the control input end of the controller is respectively connected with the control input ends of the first electric proportional switch valve and the second electric proportional switch valve, and the control output end of the controller controls the constant-pressure variable pump; the controller receives input signals from the first electric proportional switch valve and the second electric proportional switch valve and sends control signals to the constant-pressure variable pump based on the input signals.
Preferably, the heading machine arm pitch flow matching hydraulic system further comprises a first explosion-proof valve and a second explosion-proof valve,
the second driving oil port of the hydraulic reversing valve is connected with the oil inlet of the first explosion-proof valve and the oil inlet of the second explosion-proof valve;
the oil outlet of the first explosion-proof valve is connected with the rodless cavity oil port of the pitching left oil cylinder of the arm support;
and the oil outlet of the second explosion-proof valve is connected with the rodless cavity oil port of the pitching right oil cylinder of the arm support.
Preferably, the excavator arm pitch flow matching hydraulic system further comprises a first one-way valve,
the oil inlet of the first one-way valve is connected with the oil outlet of the constant-pressure variable pump;
and the oil outlet of the first one-way valve is connected with the oil inlet of the hydraulic reversing valve.
Preferably, the excavator arm pitch flow matching hydraulic system further comprises a gear pump and a second one-way valve,
the oil outlet of the gear pump is connected with the oil inlet of the second one-way valve;
the oil outlet of the second one-way valve is connected with the oil inlet of the first electric proportional switch valve and the oil inlet of the second electric proportional switch valve.
Preferably, the excavator arm pitch flow matching hydraulic system further comprises a filter,
the oil inlet of the filter is connected with the oil outlet of the second one-way valve;
the oil outlet of the filter is connected with the oil inlet of the first electric proportional switch valve and the oil inlet of the second electric proportional switch valve.
The utility model discloses an improve the part first and foremost for receiving the input signal control constant voltage variable pump and the switching-over valve that surges that come from the electric proportional switch valve through the controller, increase signal transmission speed and reduce the control process time of making the feedback, realize required flow of executive component and power component output flow assorted effect.
Drawings
Fig. 1 is a schematic diagram of a pitching flow matching hydraulic system of a heading machine arm in the embodiment;
description of reference numerals: 1. a constant pressure variable pump; 2. a hydraulically operated directional control valve; 3. a first electric proportional switch valve; 4. a second electrically proportional switching valve; 5. a boom pitching left oil cylinder; 6. the arm support pitching right oil cylinder; 7. a first explosion-proof valve; 8. a second explosion-proof valve; 9. a gear pump; 10. a first check valve; 11. a second one-way valve; 12. and (3) a filter.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.
In the description of the present invention, it should be understood that the term "between" refers to the relative positions of the devices or elements in reference to each other based on the orientation or positional relationship shown in the drawings.
As shown in fig. 1, a schematic diagram of a pitching flow matching hydraulic system of a heading machine arm in the present embodiment includes: a constant pressure variable pump 1, a hydraulic reversing valve 2, a first electric proportional switch valve 3, a second electric proportional switch valve 4, a boom pitching left oil cylinder 5, a boom pitching right oil cylinder 6,
the oil outlet of the constant-pressure variable pump 1 is connected with the oil inlet of the hydraulic reversing valve 2;
the first electric proportional switch valve 3 is connected with the left control oil port of the hydraulic reversing valve 2;
the second electric proportional switch valve 4 is connected with the right control oil port of the hydraulic reversing valve 2;
a first driving oil port of the hydraulic reversing valve 2 is connected with an oil port of a rod cavity of the arm frame pitching left oil cylinder 5 and an oil port of a rod cavity of the arm frame pitching right oil cylinder 6; a second driving oil port of the hydraulic reversing valve 2 is connected with an oil port of a rodless cavity of the arm frame pitching left oil cylinder 5 and an oil port of a rodless cavity of the arm frame pitching right oil cylinder 6;
the control input end of the controller is respectively connected with the control input ends of the first electric proportional switch valve 3 and the second electric proportional switch valve 4, and the control output end of the controller controls the constant-pressure variable pump 1; the controller receives input signals from the first electric proportional switch valve 3 and the second electric proportional switch valve 4, and sends control signals to the constant-pressure variable pump 1 based on the input signals.
Specifically, the excavator arm pitch flow matching hydraulic system provided by this embodiment further includes: the device comprises a first explosion-proof valve 7, a second explosion-proof valve 8, a gear pump 9, a first check valve 10, a second check valve 11, a filter 12 and an oil tank 13.
More specifically, an oil inlet of the constant-pressure variable pump 1 is connected with the oil tank 13, the first check valve 10 is further connected between an oil outlet of the constant-pressure variable pump 1 and an oil inlet of the hydraulic reversing valve 2, an oil inlet of the first check valve 10 is connected with an oil outlet of the constant-pressure variable pump 1, and an oil outlet of the first check valve 10 is connected with an oil inlet of the hydraulic reversing valve 2.
More specifically, the hydraulic reversing valve 2 is provided with two driving oil ports, namely a first driving oil port and a second driving oil port;
the second driving oil port of the hydraulic reversing valve 2 is connected with the oil inlet of the first explosion-proof valve 7 and the oil inlet of the second explosion-proof valve 8;
and the oil outlet of the first explosion-proof valve 7 is connected with the oil port of the rodless cavity of the arm support pitching left oil cylinder 5, and the oil outlet of the second explosion-proof valve 8 is connected with the oil port of the rodless cavity of the arm support pitching right oil cylinder 6.
More specifically, an oil outlet of the gear pump 9 is connected with an oil inlet of the second check valve 11, and an oil outlet of the second check valve 11 is connected with an oil inlet of the first electric proportional switch valve 3 and an oil inlet of the second electric proportional switch valve 4;
it should be noted that, the filter 12 is further connected between the oil outlet of the second check valve 11 and the connection of the first electric proportional switch valve 3 and the second electric proportional switch valve 4, the oil inlet of the filter 12 is connected to the oil outlet of the second check valve 11, and the oil outlet of the filter 12 is connected to the oil inlet of the first electric proportional switch valve 3 and the oil inlet of the second electric proportional switch valve 4.
In this embodiment, since the oil outlet of the first electro-proportional switch valve 3 and the oil outlet of the second electro-proportional switch valve 4 are respectively connected to the left control oil port of the hydraulic reversing valve 2 and the right control oil port of the hydraulic reversing valve 2, the first electro-proportional switch valve 3 and the second electro-proportional switch valve 4 can control the hydraulic reversing valve 2;
specifically, when the first electric proportional switch valve 3 receives an electric signal, the first electric proportional switch valve 3 serves as a pilot valve to enable the hydraulic reversing valve 2 to be in a left position, the size of a valve core opening of the hydraulic reversing valve 2 is controlled by the size of a valve core opening of the electric proportional switch valve 3, and when the electric signal is strengthened, the valve core opening of the first electric proportional switch valve 3 is enlarged to further control the valve core opening of the hydraulic reversing valve 2 to be enlarged, so that the oil flow of a rod cavity of the arm frame pitching left oil cylinder 5 and the oil flow of a rod cavity of the arm frame pitching right oil cylinder 6 are increased, and the contraction speed of the oil cylinders is adjusted;
meanwhile, when the second electric proportional switch valve 4 receives an electric signal, the same effect as above is achieved.
It should be noted that, the controller may match the appropriate control signal with the strength of the input signal sent by the first electric proportional switch valve 3 and the second electric proportional switch valve 4, and send the control signal to the constant-pressure variable pump, so as to achieve the effect of matching the output flow of the actuating element and the output flow of the power element.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (5)
1. A roadheader arm pitch flow matching hydraulic system, comprising: a constant pressure variable pump (1), a hydraulic reversing valve (2), a first electric proportional switch valve (3), a second electric proportional switch valve (4), a boom pitching left oil cylinder (5), a boom pitching right oil cylinder (6) and a controller,
the oil outlet of the constant-pressure variable pump (1) is connected with the oil inlet of the hydraulic reversing valve (2);
the first electric proportional switch valve (3) is connected with a left control oil port of the hydraulic reversing valve (2);
the second electric proportional switch valve (4) is connected with the right control oil port of the hydraulic reversing valve (2);
a first driving oil port of the hydraulic reversing valve (2) is connected with an oil port of a rod cavity of the arm frame pitching left oil cylinder (5) and an oil port of a rod cavity of the arm frame pitching right oil cylinder (6); a second driving oil port of the hydraulic reversing valve (2) is connected with a rodless cavity oil port of the arm frame pitching left oil cylinder (5) and a rodless cavity oil port of the arm frame pitching right oil cylinder (6);
the control input end of the controller is respectively connected with the control input ends of the first electric proportional switch valve (3) and the second electric proportional switch valve (4), and the control output end of the controller controls the constant-pressure variable pump (1); the controller receives input signals from the first electric proportional switch valve (3) and the second electric proportional switch valve (4) and sends control signals to the constant-pressure variable pump (1) based on the input signals.
2. The excavator arm pitch flow matched hydraulic system of claim 1 further comprising a first explosion-proof valve (7), a second explosion-proof valve (8),
a second driving oil port of the hydraulic reversing valve (2) is connected with an oil inlet of the first explosion-proof valve (7) and an oil inlet of the second explosion-proof valve (8);
an oil outlet of the first explosion-proof valve (7) is connected with an oil port of a rodless cavity of the arm support pitching left oil cylinder (5);
an oil outlet of the second explosion-proof valve (8) is connected with an oil port of a rodless cavity of the arm support pitching right oil cylinder (6).
3. The ripper arm pitch flow matching hydraulic system of claim 1, further comprising a first one-way valve (10),
an oil inlet of the first one-way valve (10) is connected with an oil outlet of the constant-pressure variable pump (1);
an oil outlet of the first one-way valve (10) is connected with an oil inlet of the hydraulic reversing valve (2).
4. The roadheader arm pitch flow matching hydraulic system according to claim 1, further comprising a gear pump (9), a second check valve (11),
an oil outlet of the gear pump (9) is connected with an oil inlet of the second one-way valve (11);
the oil outlet of the second one-way valve (11) is connected with the oil inlet of the first electric proportional switch valve (3) and the oil inlet of the second electric proportional switch valve (4).
5. The ripper arm pitch flow matching hydraulic system of claim 4, further comprising a filter (12),
the oil inlet of the filter (12) is connected with the oil outlet of the second one-way valve (11);
the oil outlet of the filter (12) is connected with the oil inlet of the first electric proportional switch valve (3) and the oil inlet of the second electric proportional switch valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221984103.2U CN217926511U (en) | 2022-07-29 | 2022-07-29 | Pitching flow matching hydraulic system for heading machine arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221984103.2U CN217926511U (en) | 2022-07-29 | 2022-07-29 | Pitching flow matching hydraulic system for heading machine arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217926511U true CN217926511U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221984103.2U Active CN217926511U (en) | 2022-07-29 | 2022-07-29 | Pitching flow matching hydraulic system for heading machine arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217926511U (en) |
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2022
- 2022-07-29 CN CN202221984103.2U patent/CN217926511U/en active Active
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