CN218235642U - Double-speed control system of quantitative motor - Google Patents
Double-speed control system of quantitative motor Download PDFInfo
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- CN218235642U CN218235642U CN202222059197.9U CN202222059197U CN218235642U CN 218235642 U CN218235642 U CN 218235642U CN 202222059197 U CN202222059197 U CN 202222059197U CN 218235642 U CN218235642 U CN 218235642U
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Abstract
A two speed control system for a fixed displacement motor comprising: a first motor and a second motor; the double-speed switching valve group is connected between the first motor and the second motor and can control the first motor and the second motor to be switched between a series state and a parallel state; and the reversing valve is connected with the two-speed switching valve group and the oil tank and is used for controlling the opening and closing states of the two-speed switching valve group. The utility model provides a double speed control system of quantitative motor can realize large-traffic high-low speed switching control.
Description
Technical Field
The utility model relates to an engineering machine tool hydraulic motor control field especially relates to a double speed control system of ration motor.
Background
In a wheel type walking mechanical system or a drilling machine power system, the high-low speed control of a quantitative motor is widely applied. Taking a walking system as an example, the motor provides large torque at low speed, so that the equipment can work in an environment with large gradient and large road resistance, and the rotating speed of the motor is large at high speed, so that the walking speed of the equipment can be increased when the gradient is small and the ground resistance is small.
However, the high-low speed control of the fixed-displacement motor is usually realized by using a casting runner at present, and the output rotating speed and the torque are greatly limited due to the volume limitation of the casting runner and the high-low speed control of the fixed-displacement motor which is usually used for realizing small flow and small displacement.
Therefore, it is urgently needed to provide a new double-speed control system for a fixed-displacement motor, which can realize the function of increasing the flow rate and realize the double-speed switching of the fixed-displacement motor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a double speed control system of ration motor, realize the double speed control switching of large-traffic motor.
In order to solve the above technical problem, an embodiment of the present invention provides a double speed control system for a quantitative motor, including: a first motor and a second motor; the double-speed switching valve group is connected between the first motor and the second motor and can control the first motor and the second motor to be switched between a series state and a parallel state; and the reversing valve is connected with the two-speed switching valve group and the oil tank and is used for controlling the opening and closing states of the two-speed switching valve group.
Optionally, the double-speed switching valve group includes a first two-way logic valve, a second two-way logic valve, and a third two-way logic valve, and the reversing valve includes a first working position and a second working position; when the reversing valve is located at a first working position, the first two-way logic valve and the third two-way logic valve are closed, the second two-way logic valve is opened, and the first motor and the second motor are in a series connection state; when the reversing valve is located at a second working position, the first two-way logic valve and the third two-way logic valve are opened, the second two-way logic valve is closed, and the first motor and the second motor are in a parallel connection state.
Optionally, the reversing valve is a two-position four-way reversing valve.
Optionally, the reversing valve includes a pressure port, a first working oil port, a second working oil port and an oil return port, and the oil return port is connected to the oil tank; when the reversing valve is located at a first working position, the first working oil port is communicated with the pressure port, and the second working oil port is communicated with the oil return port; when the reversing valve is located at a second working position, the first working oil port is communicated with the oil return port, and the second working position is communicated with the pressure port.
Optionally, the first motor includes a working port A1 and a working port B1, and the second motor includes a working port A2 and a working port B2; the first two-way logic valve comprises a first control port, a first inlet and a first outlet, the first control port is connected with a first working oil port of the reversing valve, the first inlet is connected with the working A1 port, and the first outlet is connected with the working A2 port; the second two-way logic valve comprises a second control port, a second inlet and a second outlet, the second control port is connected with a second working oil port of the reversing valve, the second inlet is connected with the working port B1, and the second outlet is connected with the working port A2; the third two-way logic valve comprises a third control port, a third inlet and a third outlet, the third control port is connected with a first working oil port of the reversing valve, the third inlet is connected with a working B1 port, and the third outlet is connected with a working B2 port.
Optionally, the method further includes: the shuttle valve comprises a first shuttle valve inlet, a second shuttle valve inlet and a shuttle valve outlet, the first shuttle valve inlet is connected with the first hydraulic oil inlet, the second shuttle valve inlet is connected with the second hydraulic oil inlet, and the shuttle valve outlet is connected with the pressure port of the reversing valve.
Optionally, the reversing valve comprises a manual reversing valve, a hydraulic control reversing valve or an electromagnetic reversing valve.
Optionally, when the reversing valve is a hydraulic control reversing valve, the reversing valve includes a reversing valve control oil port, and the reversing valve control oil port is connected to a one-way throttle valve.
Optionally, the method further includes: and the one-way throttle valve is communicated with the external oil supplementing port and the control oil port of the reversing valve.
Optionally, the one-way throttle valve communicates the working port A1 of the first motor with the control oil port of the reversing valve.
Compared with the prior art, the utility model discloses technical scheme has following beneficial effect:
according to the double-speed control system of the quantitative motor, the first motor and the second motor are controlled to be switched between the serial state and the parallel state through the double-speed switching valve bank, and therefore high-speed and low-speed control of the quantitative motor is achieved. The combination of the valves adopted by the double-speed switching valve group realizes the internal variable control and the external pilot variable control of the motor, is not limited by the volume of the integrated valve, can realize the function of increasing the flow and simultaneously realizes the double-speed switching control of the quantitative motor.
Drawings
Fig. 1 is a schematic diagram of a two-speed control system for a constant-displacement motor according to an embodiment of the present invention, in which a first motor and a second motor are connected in series;
fig. 2 is a schematic diagram of a two-speed control system for a constant displacement motor according to an embodiment of the present invention, in which a first motor and a second motor are connected in parallel;
fig. 3 is a system schematic of a two speed control system for a fixed displacement motor in accordance with another embodiment of the present invention;
fig. 4 is a system schematic of a two-speed control system for a fixed displacement motor in accordance with yet another embodiment of the present invention.
Detailed Description
As described in the background of the invention, at present, the high-low speed switching of the fixed displacement motor is usually realized by using a casting runner, but the casting runner is limited by volume, so that the casting runner is generally used for realizing the double-speed control of the fixed displacement motor with small flow and small displacement, so that the output rotating speed and the torque are greatly limited, and the requirement of more applications cannot be met.
In order to solve the problem, the utility model provides a double speed control system of ration motor adopts the double speed to switch over the valves and controls first motor and second motor and switch between the serial state and the parallel state, and first motor and second motor are the rotational speed big under the serial state, and the moment of torsion is little, and the rotational speed is little under the parallel state, and the moment of torsion is big. In addition, the high-speed and low-speed switching of the motor is controlled through the combined valve group, the size of an integrated casting flow channel cannot be limited, so that the function of increasing the flow can be realized, and more application requirements can be met.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a two-speed control system for a constant displacement motor according to an embodiment of the present invention, in which a first motor and a second motor are connected in series; fig. 2 is a schematic diagram of a two-speed control system for a constant displacement motor according to an embodiment of the present invention, in which a first motor and a second motor are connected in parallel; fig. 3 is a system schematic of a two speed control system for a fixed displacement motor in accordance with another embodiment of the present invention; fig. 4 is a schematic diagram of a two-speed control system for a constant-displacement motor according to still another embodiment of the present invention.
Referring to fig. 1 and 2, the two-speed control system of the constant-displacement motor includes: a first motor 110 and a second motor 120; a two-speed switching valve set connected between the first motor 110 and the second motor 120, the two-speed switching valve set being capable of controlling the first motor 110 and the second motor 120 to switch between a series state and a parallel state; and a reversing valve HV1, wherein the reversing valve HV1 is connected to the two-speed switching valve group and an oil tank (not shown), and the reversing valve HV1 is used for controlling the opening and closing state of the two-speed switching valve group.
In this embodiment, the two-speed control system of the fixed-displacement motor further includes a first hydraulic oil inlet V1 and a second hydraulic oil inlet V2, and the first motor 110 and the second motor 120 are connected between the first hydraulic oil inlet V1 and the second hydraulic oil inlet V2.
In this embodiment, the first motor 110 includes a working A1 port and a working B1 port, the second motor 120 includes a working A2 port and a working B2 port, the working A1 port is connected to the first hydraulic oil inlet V1, and the working A2 port is connected to the second hydraulic oil inlet V2.
In this embodiment, the reversing valve HV1 is a two-position four-way reversing valve.
Further, the reversing valve HV1 comprises a pressure port P, a first working oil port C1, a second working oil port C2 and an oil return port T, and the oil return port T is connected with the oil tank; the reversing valve HV1 comprises a first working position and a second working position, when the reversing valve HV1 is located at the first working position, the first working oil port C1 is communicated with the pressure port P, and the second working oil port C2 is communicated with the oil return port T; when the reversing valve HV1 is located at a second working position, the first working oil port C1 is communicated with the oil return port T, and the second working oil port C2 is communicated with the pressure port P.
In this embodiment, the method further includes: the shuttle valve 200 comprises a first shuttle valve inlet 201, a second shuttle valve inlet 202 and a shuttle valve outlet 203, the first shuttle valve inlet 201 is connected with the first hydraulic oil inlet V1, the second shuttle valve inlet 202 is connected with the second hydraulic oil inlet V2, and the shuttle valve outlet 203 is connected with the pressure port P of the reversing valve HV 1.
In this embodiment, the control system may operate in two directions, when oil is fed from the first hydraulic oil inlet V1, the first shuttle valve inlet 201 is communicated with the shuttle valve outlet 203, and the second hydraulic oil inlet V2 is used for returning oil; correspondingly, when the second hydraulic oil inlet V2 is filled with oil, the second shuttle valve inlet 202 is communicated with the shuttle valve outlet 203, and the first hydraulic oil inlet V1 is used for returning oil.
With continued reference to fig. 1 and 2, the two-speed switching valve block includes: the direction valve HV1 can control the open/close states of the first, second, and third two-way logic valves CL1, CL2, and CL 3.
Further, the first two-way logic valve CV1 comprises: a first control port 211, a first inlet 212 and a first outlet 213, wherein the first control port 211 is connected to a first working port C1 of the reversing valve HV1, the first inlet 212 is connected to a working port A1 of the first motor 110, and the first outlet 213 is connected to a working port A2 of the second motor 120;
the second two-way logic valve CV2 includes: a second control port 221, a second inlet 222 and a second inlet 223, wherein the second control port 221 is connected with a second working oil port C2 of the reversing valve HV1, the second inlet 222 is connected with a working B1 port of the first motor 110, and the second outlet 223 is connected with a working A2 port of the second motor 120;
the third two-way logic valve CV2 includes: a third control port 231, a third inlet 232 and a third outlet 233, wherein the third control port 231 is connected with the first working port C1 of the reversing valve HV1, the third inlet 232 is connected with the working port B1 of the first motor 110, and the third outlet 233 is connected with the working port B2 of the second motor 120.
The utility model provides a high low-speed switching's of ration motor principle as follows:
referring to fig. 1, taking the oil inlet of the first hydraulic oil inlet V1 as an example, when the reversing valve HV1 is located at the first working position, the first working oil port C1 is communicated with the pressure port P, and the second working oil port C2 is communicated with the oil return port T. At this time, a part of hydraulic oil passes through the first working oil port C1 of the reversing valve HV1 and is led to the first control port 211 of the first two-way logic valve CL1 and the third control port 231 of the third two-way logic valve CL3, and the spring chambers of the first two-way logic valve CL1 and the third two-way logic valve CL3 have pressure, so that the first two-way logic valve CL1 and the third two-way logic valve CL3 are in a closed state; the oil in the second control port 221 of the second two-way logic valve CL2 is released to the oil return port T through the second working oil port C2 of the directional control valve HV1, so that the second two-way logic valve CL2 is in an open state. The hydraulic oil entering from the first hydraulic oil inlet V1 passes through the working A1 port and the working B1 port of the first motor 110, the second inlet 222 and the second outlet 223 of the second two-way logic valve CL2 to the working A2 port of the second motor 120, and then returns from the working B2 port of the second motor 120 to the second hydraulic oil inlet V2. When the reversing valve HV1 is in the first working position, the first motor 110 and the second motor 120 are in series connection, and high-speed, small-displacement and high-pressure operation is performed.
Referring to fig. 2, the reversing valve HV1 is switched from a first working position to a second working position, the first working port C1 is communicated with the oil return port T, and the second working port C2 is communicated with the pressure port P. At this time, a part of the hydraulic oil is led to the second control port 221 of the second two-way logic valve CL2 through the second working oil port C2 of the reversing valve HV1, and the spring cavity of the second two-way logic valve CL2 has pressure, so that the second two-way logic valve CL2 is in a closed state; the oil in the first control port 211 of the first two-way logic valve CL1 and the third control port 231 of the third two-way logic valve CL2 is released from the first working oil port C1 to the oil return port T of the directional valve HV1, so that the first two-way logic valve CL1 and the third two-way logic valve CL2 are in an open state. Hydraulic oil enters from the first hydraulic oil inlet V1, and a part of the hydraulic oil returns to the second hydraulic oil inlet V2 through the working A1 port and the working B1 port of the first motor 110, the third inlet 232 and the third outlet 233 of the third two-way logic valve CL 3; a further part of the hydraulic oil passes through the first inlet 211 and the first outlet 212 of the first two-way logic valve CL1 to the second motor 120, and returns to the second hydraulic oil inlet V2 through the working A2 port and the working B2 port. When the reversing valve HV1 is at the second working position, the first motor 110 and the second motor 120 are in a parallel state, the motors are in a low-speed, large-displacement and low-pressure operation stage, and larger torque can be output under the same pressure to realize strong-power construction operation.
In this embodiment, by using the first two-way logic valve CL1, the second two-way logic valve CL2, and the third two-way logic valve CL3 in combination, the overall coverage of a conventional large flow can be realized by changing the drift diameter of the two-way logic valve, and more use requirements can be met.
Further, the reversing valve HV1 may be a manual reversing valve, a pilot operated reversing valve, or a solenoid reversing valve.
In this embodiment, the reversing valve HV1 is a manual reversing valve, and the reversing valve needs to be manually controlled to switch between the first working position and the second working position.
In another embodiment, the reversing valve is a hydraulic control reversing valve, the reversing valve comprises a reversing valve control oil port, and the switching of the working position of the reversing valve is controlled according to the oil pressure of the reversing valve control oil port.
Fig. 3 and 4 show two applications of the pilot operated directional control valve in the control system provided by the present invention.
Further, the hydraulic control system also comprises a one-way throttle valve DV1, wherein the one-way throttle valve DV1 is connected with a control oil port (not shown) of the reversing valve. By providing the one-way throttle valve DV1, the pressure can be stabilized when the first motor 110 and the second motor 120 are switched between the series state and the parallel state, and pressure fluctuation can be prevented when the motors are switched between high and low speeds.
In an embodiment, the hydraulically-controlled directional control valve may be controlled by an external oil path, and referring to fig. 3, the control system further includes: and the one-way throttle valve DV1 is positioned on a connecting circuit of the external oil supplementing port Pil and the control oil port of the reversing valve. By detecting the oil pressure at the M port on the connecting oil passage of the first hydraulic oil inlet V1 and the first inlet 211 of the first two-way logic valve CL1, it can be determined whether the first motor 110 and the second motor 120 are in the series state or the parallel state.
In another embodiment, the hydraulically-controlled directional control valve may also be controlled by an internal oil path of a control system, and referring to fig. 4, the one-way throttle valve DV1 communicates the working port A1 of the first motor 110 with the control oil port of the directional control valve, and the working position of the directional control valve is automatically switched by a main oil path of the system.
In specific application, when the quantitative motor operates in a crawler traveling system, the quantitative motor in a flat road section is connected in series for high-speed traveling, traveling speed and traveling efficiency are improved, when an ascending slope angle reaches a certain ascending slope angle, pressure of a V1 port oil way is increased, and at the moment, the motor can be directly switched from high speed to low speed and large discharge through an external control oil way or an internal control oil way to realize ascending operation.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (10)
1. A two speed control system for a fixed displacement motor, comprising:
a first motor and a second motor;
the double-speed switching valve group is connected between the first motor and the second motor and can control the first motor and the second motor to be switched between a series state and a parallel state;
and the reversing valve is connected with the two-speed switching valve group and the oil tank and is used for controlling the opening and closing states of the two-speed switching valve group.
2. The two-speed control system for a fixed displacement motor of claim 1 wherein said two-speed switch valve block includes a first two-way logic valve, a second two-way logic valve, and a third two-way logic valve, said directional control valve including a first operating position and a second operating position;
when the reversing valve is located at a first working position, the first two-way logic valve and the third two-way logic valve are closed, the second two-way logic valve is opened, and the first motor and the second motor are in a serial state;
when the reversing valve is located at a second working position, the first two-way logic valve and the third two-way logic valve are opened, the second two-way logic valve is closed, and the first motor and the second motor are in a parallel connection state.
3. The two speed control system for a fixed displacement motor of claim 2 wherein said reversing valve is a two position, four way reversing valve.
4. The two-speed control system for a constant velocity motor as claimed in claim 3, wherein said reversing valve comprises a pressure port, a first working port, a second working port and an oil return port, said oil return port being connected to said oil tank;
when the reversing valve is located at a first working position, the first working oil port is communicated with the pressure port, and the second working oil port is communicated with the oil return port;
when the reversing valve is located at a second working position, the first working oil port is communicated with the oil return port, and the second working position is communicated with the pressure port.
5. The two speed control system for a dosing motor in claim 4 wherein said first motor includes a work A1 port and a work B1 port and said second motor includes a work A2 port and a work B2 port;
the first two-way logic valve comprises a first control port, a first inlet and a first outlet, the first control port is connected with a first working oil port of the reversing valve, the first inlet is connected with the working A1 port, and the first outlet is connected with the working A2 port;
the second two-way logic valve comprises a second control port, a second inlet and a second outlet, the second control port is connected with a second working oil port of the reversing valve, the second inlet is connected with the working port B1, and the second outlet is connected with the working port A2;
the third two-way logic valve comprises a third control port, a third inlet and a third outlet, the third control port is connected with a first working oil port of the reversing valve, the third inlet is connected with a working B1 port, and the third outlet is connected with a working B2 port.
6. The two speed control system for a fixed displacement motor as in claim 4 further comprising: the shuttle valve comprises a first shuttle valve inlet, a second shuttle valve inlet and a shuttle valve outlet, the first shuttle valve inlet is connected with the first hydraulic oil inlet, the second shuttle valve inlet is connected with the second hydraulic oil inlet, and the shuttle valve outlet is connected with the pressure port of the reversing valve.
7. A two speed control system for a fixed displacement motor as in claim 2 wherein said directional control valve comprises a manual directional control valve, a pilot controlled directional control valve or a solenoid directional control valve.
8. The double-speed control system for the constant-displacement motor as claimed in claim 7, wherein when the direction-changing valve is a hydraulic control direction-changing valve, the direction-changing valve comprises a direction-changing valve control oil port, and the direction-changing valve control oil port is connected with a one-way throttle valve.
9. The two speed control system for a fixed displacement motor as in claim 8 further comprising: and the one-way throttle valve is communicated with the external oil supplementing port and the reversing valve control port.
10. The system as claimed in claim 8, wherein the one-way throttle valve communicates the working A1 port of the first motor with the control port of the reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222059197.9U CN218235642U (en) | 2022-08-05 | 2022-08-05 | Double-speed control system of quantitative motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222059197.9U CN218235642U (en) | 2022-08-05 | 2022-08-05 | Double-speed control system of quantitative motor |
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| Publication Number | Publication Date |
|---|---|
| CN218235642U true CN218235642U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222059197.9U Active CN218235642U (en) | 2022-08-05 | 2022-08-05 | Double-speed control system of quantitative motor |
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| CN (1) | CN218235642U (en) |
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- 2022-08-05 CN CN202222059197.9U patent/CN218235642U/en active Active
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