CN112498047A - Crane air conditioner control system and crane - Google Patents
Crane air conditioner control system and crane Download PDFInfo
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- CN112498047A CN112498047A CN201910872047.XA CN201910872047A CN112498047A CN 112498047 A CN112498047 A CN 112498047A CN 201910872047 A CN201910872047 A CN 201910872047A CN 112498047 A CN112498047 A CN 112498047A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
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Abstract
The application discloses hoist air conditioner control system and hoist, hoist air conditioner control system includes: an air conditioning motor; a main oil passage in which a first control valve is provided, the first control valve being used to selectively communicate an oil passage of the air conditioner motor with the main oil passage; the control oil way is connected between the inlet end of the main oil way and a first port of the valve cavity of the first control valve, and a second control valve is arranged in the control oil way; the oil return circuit is connected between the second port of the valve cavity of the first control valve and the oil tank, and a first throttling element is arranged in the oil return circuit; the second control valve is set to be opened when the actual temperature value exceeds the preset temperature value, so that the control oil way controls the first control valve to communicate the oil way of the air conditioner motor with the main oil way. The crane air conditioner control system can avoid the air conditioner to start the air conditioner and then the air conditioner motor is impacted by hydraulic pressure to cause serious vibration, and has good structural stability.
Description
Technical Field
The application relates to the technical field of crane manufacturing, in particular to a crane air-conditioning control system and a crane with the same.
Background
Wheel crane in the existing market all is equipped with the air conditioner and is used for adjusting the operating temperature of hoist. In the related art, the start of the air conditioner is controlled by a temperature sensor, and the air conditioner is automatically started when the temperature reaches a set value, but because an air conditioner oil way is connected in series on a rotary oil way, a rotary system violently shakes due to the instant rise of pressure when the air conditioner is started, and an improved space exists.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of the present application is to provide a crane air conditioner control system, in which the air conditioner is turned on smoothly and has small pressure impact, and the condition of violent shaking does not occur.
According to this application embodiment's hoist air conditioner control system, includes: an air conditioning motor; a main oil passage in which a first control valve is provided, the first control valve being used to selectively communicate an oil passage of the air conditioner motor with the main oil passage; the control oil way is connected between the inlet end of the main oil way and a first port of the valve cavity of the first control valve, and a second control valve is arranged in the control oil way; the oil return circuit is connected between a second port of the valve cavity of the first control valve and an oil tank, and a first throttling element is arranged in the oil return circuit; and the second control valve is set to be opened when the actual temperature value exceeds a preset temperature value, so that the control oil path controls the first control valve to communicate the oil path of the air conditioner motor with the main oil path.
According to the crane air conditioner control system provided by the embodiment of the application, the first control valve is controlled through the control oil way and the oil return oil way, the flow of hydraulic oil in the air conditioner motor is gradually increased after the air conditioner is started, the air conditioner motor cannot be seriously vibrated due to too large impact, the rotary vibration of the air conditioner is reduced, and the stability of the air conditioner system is improved.
According to some embodiments of the present disclosure, the first control valve has a first working position and a second working position, and in the first working position, a spool of the first control valve is located in the valve chamber at a position close to the first port, and the first control valve disconnects an oil passage of the air-conditioning motor from the main oil passage; when the air conditioner motor is in the second working position, the valve core of the first control valve is positioned in the position, close to the second port, in the valve cavity, and the first control valve is used for communicating an oil path of the air conditioner motor with the main oil path; and after the second control valve is opened, the first control valve is switched from the first working position to the second working position.
According to the crane air conditioning control system of some embodiments of the application, the first control valve is provided with a pre-tightening spring, and the pre-tightening spring is used for elastically pre-tightening a valve core of the first control valve towards a position close to the first port.
According to the crane air conditioner control system, a second throttling element is arranged in the control oil path and is located between the outlet end of the second control valve and the first port of the valve cavity of the first control valve.
According to some embodiments of the present application, the first throttling element and the second throttling element are both one-way throttle valves, and the first throttling element is set to conduct and throttle reversely from the oil tank to the second port of the valve chamber of the first control valve in one-way, and the second throttling element is set to conduct and throttle reversely from the outlet end of the second control valve to the first port of the first control valve in one-way.
The crane air conditioning control system according to some embodiments of the present application, further comprising: and the part of the control oil path between the second control valve and the second throttling element is connected with the first end of the sub-branch, the second end of the sub-branch is connected with the oil tank, and the sub-branch is provided with a first damping element.
According to some embodiments of the present application, a second damping element is disposed between the outlet end of the second control valve and the first end of the sub-branch, and a damping force of the second damping element is greater than a damping force of the first damping element.
According to some embodiments of the crane air conditioning control system of the present application, an overflow valve is disposed between the second damping element and the first end of the sub-branch.
According to some embodiments of the present application, a filter screen is disposed between the inlet end of the main oil passage and the second control valve, and between the first throttling element and the oil tank.
The application also provides a crane.
According to the crane of the embodiment of the application, the crane air-conditioning control system is arranged.
Compared with the prior art, the crane has the same advantages as the crane air-conditioning control system, and the description is omitted.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a crane air conditioning control system according to an embodiment of the present application.
Reference numerals:
the air-conditioning control system 100 for a crane,
the air-conditioning motor (1) is,
a main oil passage 2, a first control valve 21, a preload spring 22,
the control oil passage 3, the second control valve 31, the second throttling element 32,
the oil return passage 4, the first throttling element 41,
the device comprises a sub-branch 5, a first damping element 61, a second damping element 62, an overflow valve 63, a filter screen 7 and an oil tank L.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Referring to fig. 1, a crane air-conditioning control system 100 according to an embodiment of the present application will be described, where the crane air-conditioning control system 100 controls hydraulic oil to slowly enter an air-conditioning motor 1 when an air conditioner is started, so that the starting process is smooth and the pressure impact is small, and the rotation shake caused by the pressure impact at the moment of too fast starting can be effectively avoided.
As shown in fig. 1, a crane air conditioning control system 100 according to an embodiment of the present application includes: air conditioner motor 1, main oil circuit 2, control oil circuit 3 and oil return circuit 4.
The oil path of the air-conditioning motor 1 is connected to the main oil path 2, as shown in fig. 1, the oil inlet path of the main oil path 2 is connected to the inlet end of the oil path of the air-conditioning motor 1, and the oil outlet path of the main oil path 2 is connected to the outlet end of the oil path of the air-conditioning motor 1. And the inlet end P of the oil inlet channel of the main oil channel 2 is connected with the rotary pump, and the outlet end C of the oil outlet channel of the main oil channel 2 is connected with the rotary buffering valve port, so that hydraulic oil in the rotary system can enter the air-conditioning motor 1 through the main oil channel 2, and the air-conditioning motor 1 starts to operate and is under control.
As shown in fig. 1, a first control valve 21 is disposed in the main oil path 2, and the first control valve 21 is used for selectively communicating the oil path of the air-conditioning motor 1 with the main oil path 2, and the first control valve 21 can selectively communicate the oil path of the air-conditioning motor 1 with an inlet end P of an oil inlet path of the main oil path 2 and an outlet end C of an oil outlet path of the main oil path 2, so that external hydraulic oil can flow through the oil path of the air-conditioning motor 1 through the main oil path 2, and the air-conditioning motor 1 is in an open state; the first control valve 21 may also selectively disconnect the oil path of the air-conditioning motor 1 from the inlet end P of the oil inlet path of the main oil path 2 and the outlet end C of the oil outlet path of the main oil path 2, so that external hydraulic oil cannot enter the oil path of the air-conditioning motor 1 through the main oil path 2, and the air-conditioning motor 1 is in a stop operation state.
Thus, the operating state of the air-conditioning motor 1 can be switched by controlling the operating position of the first control valve 21 so that the first control valve 21 selectively communicates the oil passage of the air-conditioning motor 1 with the main oil passage 2.
The control oil path 3 is connected between an inlet end of the main oil path 2 and a first port a of the valve cavity of the first control valve 21, a second control valve 31 is arranged in the control oil path 3, the second control valve 31 is used for controlling a communication state between the main oil path 2 and the valve cavity of the first control valve 21, namely, the second control valve 31 can selectively communicate the main oil path 2 and the valve cavity of the first control valve 21, so that when the main oil path 2 is communicated with the valve cavity of the first control valve 21, hydraulic oil in the main oil path 2 enters the valve cavity of the first control valve 21, the working position of the first control valve 21 is controlled by the pressure of the hydraulic oil, and the working state of the air-conditioning motor 1 is switched.
The oil return passage 4 is connected between the second port b of the valve chamber of the first control valve 21 and the oil tank L so that the hydraulic oil in the valve chamber of the first control valve 21 can flow into the oil tank L through the oil return passage 4.
It should be noted that the first control valve 21 includes a valve chamber and a valve core located in the valve chamber, the valve chamber of the first control valve 21 has a first port a and a second port b, the valve core is adapted to move between a position close to the first port a and a position close to the second port b, and when the first port a is filled with oil, the valve core gradually moves to a position close to the second port b. When the valve core is located at a position close to the first port a, the first control valve 21 connects the oil path of the air-conditioning motor 1 with the main oil path 2 to operate the air-conditioning motor 1, and when the valve core is located at a position close to the second port b, the first control valve 21 disconnects the oil path of the air-conditioning motor 1 from the main oil path 2 to stop the operation of the air-conditioning motor 1.
The first control valve 21 has a first operating position in which the spool of the first control valve 21 is located in the valve chamber at a position close to the first port a, the first control valve 21 is in a closed state, and the first control valve 21 disconnects the oil passage of the air-conditioning motor 1 from the main oil passage 2; in the second operating position, the spool of the first control valve 21 is located in the valve chamber at a position close to the second port b, the first control valve 21 is in an open state, and the first control valve 21 communicates the oil passage of the air-conditioning motor 1 with the main oil passage 2. Wherein the opening pressure of the first control valve 21 is 5bar-25 bar.
A first throttling element 41 is provided in the oil return passage 4, and the first throttling element 41 is used to limit the flow rate of the hydraulic oil in the oil return passage 4 so that the hydraulic oil flows at a constant flow rate during the flow of the hydraulic oil in the valve chamber of the first control valve 21 from the second port b to the tank L.
Thus, after the second control valve 31 is opened, the hydraulic oil in the main oil passage 2 flows from the first port a of the valve chamber in the main oil passage 2 into the first side of the spool through the second control valve 31, and pushes the spool of the first control valve 21 to gradually move from a position near the first port a to a position near the second port b, so that the first control valve 21 gradually communicates the main oil passage 2 with the air-conditioning motor 1, that is, the first control valve 21 is switched from the first operating position to the second operating position after the second control valve 31 is opened.
During the injection of the hydraulic oil into the first port a of the first control valve 21, the hydraulic oil on the second side of the spool gradually flows from the second port b to the tank L, and the first restriction element 41 may act to restrict the flow rate of the hydraulic oil of the oil return passage 4, so that the spool of the first control valve 21 does not rapidly move directly from a position near the first port a to a position near the second port b, that is, the movement of the spool is relatively slow, in other words, the opening degree of the first control valve 21 between the main oil passage 2 and the oil passage of the air-conditioning motor 1 is gradually increased, thereby, the flow rate of the hydraulic oil that enters the oil passage of the air-conditioning motor 1 from the main oil passage 2 can be made to increase slowly, and further, the phenomenon that the impact force is too large due to too much hydraulic oil in the air-conditioning motor 1 at the moment of opening the air conditioner is avoided, the air-conditioning motor 1 is prevented from generating serious vibration, the rotary vibration of the air conditioner is reduced, and the stability of an air-conditioning system is improved.
Wherein the second control valve 31 is set to be opened when the actual temperature value exceeds the preset temperature value so that the control oil path 3 controls the first control valve 21 to communicate the oil path of the air-conditioning motor 1 with the main oil path 2.
It can be known that the opening and closing of the second control valve 31 is related to the ambient temperature in the air conditioning system, and if the ambient temperature in the air conditioning system is too high and is greater than the highest preset temperature value, the second control valve 31 is automatically opened, and the first control valve 21 is controlled to communicate the main oil path 2 with the oil path of the air conditioning motor 1, so that the air conditioner operates, and the air conditioning system starts to cool, so as to cool the environment.
Therefore, the second control valve 31 and the first control valve 21 are automatically opened, manual opening by a user is not needed, the control system is convenient to use, the intelligent degree is high, and the use by the user is more comfortable.
According to the crane air conditioner control system 100 provided by the embodiment of the application, the first control valve 21 is controlled through the control oil path 3 and the oil return path 4, so that the flow of hydraulic oil in the air conditioner motor 1 is gradually increased after the air conditioner is started, the air conditioner motor 1 cannot be seriously vibrated due to too large impact, the rotary vibration of the air conditioner is reduced, and the stability of the air conditioner system is improved.
In some embodiments, as shown in fig. 1, the first control valve 21 is provided with a pre-tightening spring 22, and the pre-tightening spring 22 is used for elastically pre-tightening the spool of the first control valve 21 towards a position close to the first port a, that is, the pre-tightening spring 22 holds the spool in a position close to the first port a in the valve cavity by using the elastic force of the pre-tightening spring 22 when the spool is not under the action of the hydraulic oil.
Thus, after the second control valve 31 is opened, the hydraulic oil enters the first side of the valve cavity from the first port a from the main oil path 2, and overcomes the pre-tightening spring 22 to make the valve core gradually move towards the position close to the second port b, so that the first control valve 21 is gradually opened, and in the process of the valve core movement, the elastic force of the pre-tightening spring 22 is gradually increased, so that the valve core cannot rapidly move to the position close to the second port b, and the opening degree of the first control valve 21 is gradually increased, thereby preventing excessive hydraulic oil from entering the air conditioning motor 1 at the moment of opening the air conditioner to generate larger impact force, and improving the stability of the air conditioning system.
As shown in fig. 1, a second throttling element 32 is provided in the control oil passage 3, and the second throttling element 32 is located between the outlet end of the second control valve 31 and the first port a of the valve chamber of the first control valve 21. Thus, after the second control valve 31 is opened, the hydraulic oil flowing out of the second control valve 31 needs to pass through the second restriction element 32 to flow to the first side of the valve chamber of the first control valve 21.
The first and second throttling elements 41, 32 are both one-way throttles.
Wherein the first throttling element 41 is arranged to be in one-way communication and reverse throttling from the tank L to the second port b of the valve chamber of the first control valve 21, and the second throttling element 32 is arranged to be in one-way communication and reverse throttling from the outlet port of the second control valve 31 to the first port of the valve chamber of the first control valve 21.
Thus, in the process of opening the first control valve 21, the hydraulic oil flowing out of the second control valve 31 flows to the first side of the valve cavity of the first control valve 21 through the second throttling element 32, the hydraulic oil on the second side of the valve cavity of the first control valve 21 gradually flows into the oil tank, and in the process of flowing, the first throttling element 41 throttles the hydraulic oil flowing out of the first control valve 21, so that the first control valve 21 is slowly opened, and the impact force generated by the hydraulic oil entering the air-conditioning motor 1 is reduced.
In the process of closing the first control valve 21, the second control valve 31 is in a closed state, the spool of the first control valve 21 moves towards a position close to the first port a of the valve cavity under the action of the pre-tightening spring 22, along with the movement of the spool, the hydraulic oil in the oil tank flows into the second side of the valve cavity from the second port b of the valve cavity of the first control valve 21, and the hydraulic oil on the first side of the valve cavity flows out from the first port a and gradually flows into the oil tank through the second throttling element 32, and the second throttling element 32 can perform a throttling function on the hydraulic oil to limit the outflow speed of the hydraulic oil on the first side of the valve cavity, so that the closing time of the first control valve 21 is controlled, and the air conditioner is slowly closed.
Therefore, the first throttling element 41 and the second throttling element 32 can control the flow of the hydraulic oil in the control oil circuit 3 and the oil return oil circuit 4, so that the hydraulic oil in the air-conditioning system of the crane flows reasonably, the air conditioner is ensured to be opened or closed slowly, and the design rationality of the air-conditioning system of the crane is improved.
When the air conditioner is turned on, the first control valve 21 and the second throttling element 32 are matched to control the oil quantity flowing into the air conditioner motor 1 to be gradually increased from B1-A1, and the opening pressure (5bar-25bar) of the first control valve 21 is gradually increased. When the air conditioner is turned off, the first control valve 21 and the second throttling element 32 cooperate to control the amount of oil entering the air conditioner motor 1 to be gradually reduced.
In some embodiments, the crane air conditioning control system 100 further comprises: a sub branch 5.
A portion of the control oil passage 3 between the second control valve 31 and the second throttling element 32 is connected to a first end of the sub-branch 5, and a second end of the sub-branch 5 is connected to the tank L. In this way, a major part of the hydraulic oil flowing out of the second control valve 31 enters the valve cavity of the first control valve 21 to drive the valve core to move, and the rest of the hydraulic oil flows back to the oil tank L from the sub-branch 5, so as to avoid the excessive pressure of the hydraulic oil in the control oil path 3 and prevent the structural damage of the control oil path 3.
The first damping element 61 is arranged in the sub-branch 5, and the first damping element 61 is used for increasing the flow resistance of the hydraulic oil in the sub-branch 5, so that the hydraulic oil flowing out of the second control valve 31 is more and the pressure is too large, the resistance of the first damping element 61 is overcome, the hydraulic oil flows into the oil tank L, the pressure of the hydraulic oil in the control oil path 3 is further prevented from being too large, meanwhile, the hydraulic oil flowing out of the second control valve 31 is prevented from flowing into the oil tank L too much, and the hydraulic oil entering the valve cavity of the first control valve 21 is ensured to push the valve core to move to a position close to the second port b.
As shown in fig. 1, a second damping element 62 is disposed between the outlet end of the second control valve 31 and the first end of the branch 5, and the flow rate of the hydraulic oil between the second control valve 31 and the first control valve 21 can be effectively reduced by disposing the second damping element 62, so as to effectively control the flow rate of the hydraulic oil entering the first control valve 21 and reduce the impact force applied to the air-conditioning motor 1.
The damping force of the second damping element 62 is greater than the resistance of the first damping element 61, so that the hydraulic oil flowing through the second damping element can flow back to the oil tank L against the resistance of the first damping element 61 when flowing to the sub-branch 5, and the reasonability of the design of the control system is improved.
A relief valve 63 is provided between the second damping element 62 and the first end of the branch 5, so that excess hydraulic oil can flow out of the relief valve 63 when the pressure of the hydraulic oil flowing out of the second damping element 62 is excessive, and as shown in fig. 1, the relief valve 63 is connected to the tank L so that excess can flow back into the tank L. Wherein the pressure at which the relief valve 63 opens can be set to 30 bar.
In some embodiments, as shown in fig. 1, a filter screen 7 is disposed between the inlet end of the main oil passage 2 and the second control valve 31, and between the first throttling element 41 and the oil tank L, and the filter screen 7 can filter the hydraulic oil to reduce impurities in the hydraulic oil, so that the hydraulic oil entering the second control valve 31 and the oil tank L is kept clean.
The application also provides a crane.
According to the crane of the embodiment of the application, the crane air-conditioning control system 100 of any one of the embodiments is arranged, the flow of the hydraulic oil in the air-conditioning motor 1 of the crane is gradually increased after the air conditioner of the crane is started, so that the air-conditioning motor 1 is not seriously vibrated due to the overlarge impact force, the rotary vibration of the air conditioner is reduced, and the integral noise of the crane is reduced. Wherein the crane may be a wheel crane.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In the description of the present application, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present application, "a plurality" means two or more.
In the description of the present application, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact not directly but via another feature therebetween.
In the description of the present application, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A crane air conditioning control system (100), comprising:
an air conditioning motor (1);
a main oil path (2), wherein a first control valve (21) is arranged in the main oil path (2), and the first control valve (21) is used for selectively communicating the oil path of the air-conditioning motor (1) with the main oil path (2);
the control oil way (3) is connected between the inlet end of the main oil way (2) and a first port of a valve cavity of the first control valve (21), and a second control valve (31) is arranged in the control oil way (3);
the oil return circuit (4) is connected between a second port of the valve cavity of the first control valve (21) and the oil tank L, and a first throttling element (41) is arranged in the oil return circuit (4); wherein
The second control valve (31) is set to be opened when the actual temperature value exceeds a preset temperature value, so that the control oil circuit (3) controls the first control valve (21) to communicate the oil circuit of the air-conditioning motor (1) with the main oil circuit (2).
2. Crane air conditioning control system (100) according to claim 1, characterized in that the first control valve (21) has a first operating position and a second operating position,
in the first working position, a valve core of the first control valve (21) is positioned in the valve cavity at a position close to the first port, and the first control valve (21) disconnects an oil path of the air-conditioning motor (1) from the main oil path (2);
in the second working position, a valve core of the first control valve (21) is positioned in the valve cavity at a position close to the second port, and the first control valve (21) is used for communicating an oil path of the air-conditioning motor (1) with the main oil path (2);
the first control valve (21) is switched from the first operating position to the second operating position after the second control valve (31) is opened.
3. The crane air conditioning control system (100) according to claim 1, characterized in that the first control valve (21) is provided with a pretension spring (22), the pretension spring (22) being adapted to resiliently pretension the spool of the first control valve (21) towards a position close to the first port.
4. A crane air conditioning control system (100) according to any of claims 1-3, characterized in that a second throttling element (32) is provided in the control oil circuit (3), and that the second throttling element (32) is located between the outlet end of the second control valve (31) and the first port of the valve chamber of the first control valve (21).
5. The crane air conditioning control system (100) according to claim 4, characterized in that the first throttling element (41) and the second throttling element (32) are both one-way throttle valves, and the first throttling element (41) is arranged to be unidirectionally conducting and reversely throttling from the tank L to a second port of the valve chamber of the first control valve (21), and the second throttling element (32) is arranged to be unidirectionally conducting and reversely throttling from an outlet port of the second control valve (31) to a first port of the valve chamber of the first control valve (21).
6. The crane air conditioning control system (100) of claim 4 further comprising: and the part of the control oil path (3) between the second control valve (31) and the second throttling element (32) is connected with the first end of the sub-branch (5), the second end of the sub-branch (5) is connected with the oil tank L, and the sub-branch (5) is provided with a first damping element (61).
7. Crane air conditioning control system (100) according to claim 6, characterized in that a second damping element (62) is provided between the outlet end of the second control valve (31) and the first end of the sub-branch (5), and the damping force of the second damping element (62) is greater than the damping force of the first damping element (61).
8. Crane air conditioning control system (100) according to claim 6, characterized in that an overflow valve (63) is provided between the second damping element (62) and the first end of the sub-branch (5).
9. A crane air conditioning control system (100) according to any of claims 1-3, characterized in that a filter screen (7) is provided between the inlet end of the main oil circuit (2) and the second control valve (31) and between the first throttling element (41) and the oil tank L.
10. A crane, characterized in that a crane air conditioning control system (100) according to any one of claims 1-9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910872047.XA CN112498047A (en) | 2019-09-16 | 2019-09-16 | Crane air conditioner control system and crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910872047.XA CN112498047A (en) | 2019-09-16 | 2019-09-16 | Crane air conditioner control system and crane |
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| CN112498047A true CN112498047A (en) | 2021-03-16 |
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| CN201910872047.XA Pending CN112498047A (en) | 2019-09-16 | 2019-09-16 | Crane air conditioner control system and crane |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06159317A (en) * | 1992-11-30 | 1994-06-07 | Sumitomo Constr Mach Co Ltd | Counter balance circuit |
| CN201738368U (en) * | 2010-04-14 | 2011-02-09 | 福田雷沃国际重工股份有限公司 | Hydraulic damping control loop of excavator |
| CN102141056A (en) * | 2011-05-13 | 2011-08-03 | 合肥长源液压股份有限公司 | Electromagnetic control valve for medium-size truck-mounted crane |
| CN202326475U (en) * | 2011-11-28 | 2012-07-11 | 常德中联重科液压有限公司 | Control valve for controlling air conditioner and rotary valve and control loop |
| CN203582302U (en) * | 2013-11-28 | 2014-05-07 | 中联重科股份有限公司 | Control valve group, hydraulic control system and automobile crane |
| CN103950850A (en) * | 2014-05-16 | 2014-07-30 | 安徽柳工起重机有限公司 | Revolving platform hydraulic braking system of automobile crane |
| CN106006387A (en) * | 2016-05-11 | 2016-10-12 | 北汽福田汽车股份有限公司 | Air conditioner rotation system and engineering machine with same |
| CN107867146A (en) * | 2017-11-22 | 2018-04-03 | 徐工集团工程机械有限公司 | A kind of pressure regulating system of craneman's house hydraulic-driven air conditioner |
-
2019
- 2019-09-16 CN CN201910872047.XA patent/CN112498047A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06159317A (en) * | 1992-11-30 | 1994-06-07 | Sumitomo Constr Mach Co Ltd | Counter balance circuit |
| CN201738368U (en) * | 2010-04-14 | 2011-02-09 | 福田雷沃国际重工股份有限公司 | Hydraulic damping control loop of excavator |
| CN102141056A (en) * | 2011-05-13 | 2011-08-03 | 合肥长源液压股份有限公司 | Electromagnetic control valve for medium-size truck-mounted crane |
| CN202326475U (en) * | 2011-11-28 | 2012-07-11 | 常德中联重科液压有限公司 | Control valve for controlling air conditioner and rotary valve and control loop |
| CN203582302U (en) * | 2013-11-28 | 2014-05-07 | 中联重科股份有限公司 | Control valve group, hydraulic control system and automobile crane |
| CN103950850A (en) * | 2014-05-16 | 2014-07-30 | 安徽柳工起重机有限公司 | Revolving platform hydraulic braking system of automobile crane |
| CN106006387A (en) * | 2016-05-11 | 2016-10-12 | 北汽福田汽车股份有限公司 | Air conditioner rotation system and engineering machine with same |
| CN107867146A (en) * | 2017-11-22 | 2018-04-03 | 徐工集团工程机械有限公司 | A kind of pressure regulating system of craneman's house hydraulic-driven air conditioner |
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