CN221462663U - Hydraulic control device capable of being used for motor protection - Google Patents
Hydraulic control device capable of being used for motor protection Download PDFInfo
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- CN221462663U CN221462663U CN202323341891.0U CN202323341891U CN221462663U CN 221462663 U CN221462663 U CN 221462663U CN 202323341891 U CN202323341891 U CN 202323341891U CN 221462663 U CN221462663 U CN 221462663U
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- 238000013016 damping Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 262
- 239000007788 liquid Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model discloses a hydraulic control device capable of being used for motor protection, which relates to the technical field of hydraulic control equipment and comprises an oil inlet channel, a direction control device, an oil outlet channel, a hydraulic damper and a first oil return channel, wherein the hydraulic damper is provided with a damping hole, the oil inlet channel and the oil outlet channel are respectively communicated with an oil inlet and an oil outlet of the direction control device, the direction control device can enable oil to flow from the oil inlet channel to the oil outlet channel and can prevent the oil from flowing from the oil outlet channel to the oil inlet channel, the oil inlet channel and the first oil return channel are respectively communicated with the oil inlet and the oil outlet of the damping hole, and the damping hole can enable the oil to flow from the oil inlet channel to the first oil return channel which is used for being communicated with an oil tank. The hydraulic control device for motor protection has a good motor protection effect, and can ensure the continuity of production, thereby saving the production cost.
Description
Technical Field
The utility model relates to the technical field of hydraulic control equipment, in particular to a hydraulic control device capable of being used for motor protection.
Background
The hydraulic system is a set of devices that use oil as a working medium and utilize the pressure energy of the oil to operate a hydraulic actuator through control valves and other accessories (including power elements, actuators, control elements, auxiliary elements, and hydraulic oil). The control element (hydraulic control device) is used in a hydraulic system to control and regulate the pressure, flow and direction of liquid, the power element is used to convert the mechanical energy of the prime mover into the pressure energy of the liquid, and the power element generally refers to an oil pump in the hydraulic system, and the oil pump is generally driven by a motor. When the motor is in a low-speed running state for a long time, the motor is easy to overload and excessively heated, so that the motor is burnt.
At present, the structure of a motor (an actuating mechanism) is improved to realize motor protection, for example, a thermal relay is arranged in a motor main circuit, the thermal relay can detect the temperature of the motor when the motor runs, and when the temperature in the motor is higher, the thermal relay acts, a normally closed contact cuts off a control circuit, and the motor stops running; after overload is removed, the contact of the thermal relay is reset automatically or manually to restart the circuit. The mode is easily influenced by external environment temperature, for example, when the motor runs for a long time under the condition of high temperature in summer, the temperature of the motor can be increased, the thermal relay can be triggered by mistake, the production is interrupted, and unnecessary economic loss is caused. At present, no research has been made to add a motor protection function to a hydraulic control device.
Disclosure of utility model
The utility model aims to provide a hydraulic control device for motor protection, which solves the problems in the prior art, has a good motor protection effect, can ensure the continuity of production, and saves the production cost.
In order to achieve the above object, the present utility model provides the following solutions:
The utility model provides a hydraulic control device capable of being used for motor protection, which comprises an oil inlet channel, a direction control device, an oil outlet channel, a hydraulic damper and a first oil return channel, wherein the hydraulic damper is provided with a damping hole, the oil inlet channel and the oil outlet channel are respectively communicated with an oil inlet and an oil outlet of the direction control device, the direction control device can enable oil to flow from the oil inlet channel to the oil outlet channel and can prevent the oil from flowing from the oil outlet channel to the oil inlet channel, the oil inlet channel and the first oil return channel are respectively communicated with the oil inlet and the oil outlet of the damping hole, and the damping hole can enable the oil to flow from the oil inlet channel to the first oil return channel which is used for being communicated with an oil tank.
Preferably, the oil tank further comprises an overflow valve group and a second oil return channel, wherein an oil inlet and an oil outlet of the overflow valve group are respectively communicated with the oil inlet channel and the second oil return channel, and the second oil return channel is used for being communicated with the oil tank.
Preferably, the overflow valve group comprises a pressure control component, a pilot valve and an electromagnetic valve, wherein an oil inlet of the electromagnetic valve is communicated with the oil inlet channel, a control port of the pressure control component and an oil inlet of the pilot valve, an oil return port of the electromagnetic valve is communicated with the second oil return channel, a first working oil port of the electromagnetic valve is communicated with the second oil return channel, when the electromagnetic valve is opened, oil can flow back to the second oil return channel from the oil inlet of the electromagnetic valve and the first working oil port of the electromagnetic valve, and when the electromagnetic valve is closed, oil can be prevented from flowing back to the second oil return channel through the electromagnetic valve;
An oil inlet of the pilot valve is communicated with the oil inlet channel, an oil return port of the pilot valve is communicated with the second oil return channel, and when the electromagnetic valve is closed and the pilot valve is opened, the oil can flow back to the second oil return channel from the oil inlet channel through the oil inlet of the pilot valve and the oil return port of the pilot valve;
The oil inlet of the pressure control part is communicated with the oil inlet channel, the oil return port of the pressure control part is communicated with the second oil return channel, the control port of the pressure control part is communicated with a pipeline between the pilot valve and the oil inlet channel, the pressure control part can enable oil to flow back to the second oil return channel from the oil inlet channel through the oil inlet of the pressure control part and the oil return port of the pressure control part when the solenoid valve is closed and the pilot valve is opened, and the pressure control part can prevent oil from flowing back to the second oil return channel from the oil inlet channel through the pressure control part when the pilot valve is closed.
Preferably, the direction control device is a one-way valve or a hydraulic control cover plate.
Preferably, the pilot valve is an overflow valve.
Preferably, the electromagnetic valve is a two-position four-way electromagnetic valve.
Preferably, the pressure control member is a hydraulic control cover plate.
Preferably, the aperture of the damping hole of the hydraulic damper is 0.8mm-1mm.
Compared with the prior art, the utility model has the following technical effects:
The utility model provides a hydraulic control device capable of being used for motor protection, which comprises an oil inlet channel, a direction control device, an oil outlet channel, a hydraulic damper and a first oil return channel, wherein the hydraulic damper is provided with a damping hole, the oil inlet channel and the oil outlet channel are respectively communicated with an oil inlet and an oil outlet of the direction control device, the direction control device can enable oil to flow from the oil inlet channel to the oil outlet channel and can prevent the oil from flowing from the oil outlet channel to the oil inlet channel, the oil inlet channel and the first oil return channel are respectively communicated with an oil inlet and an oil outlet of the damping hole, the damping hole can enable the oil to flow from the oil inlet channel to the first oil return channel, and the first oil return channel is used for being communicated with an oil tank.
The damping hole of the hydraulic damper can enable oil to flow from the oil inlet of the oil inlet channel to the first oil return port of the first oil return channel to realize oil return, and as the flow area of the damping hole is smaller relative to the oil flow channels (the oil inlet channel, the oil outlet channel and the like) in the working loop, less oil can only be allowed to pass through; in a normal working state, the motor drives the oil pump to rotate, oil is fed from an oil inlet of the oil feeding channel and is discharged from an oil outlet of the oil discharging channel through the direction control device, so that normal hydraulic action is realized, and at the moment, only a small amount of oil is damped Kong Huiyou, so that the normal operation of a hydraulic system is not influenced; when the motor runs at a low speed due to unstable voltage and the like, the flow speed of oil between the oil inlet channel and the oil outlet channel is low, the oil is insufficient to be discharged by the oil outlet channel, at the moment, the damping hole can allow a small amount of oil in the oil inlet channel to flow back to the first oil return channel, overload of the motor can be reduced to a certain extent, and accordingly the motor is prevented from being burnt. According to the utility model, the hydraulic damper is added in the hydraulic control device to realize motor protection, false triggering of overheat protection caused by environment abnormality (high temperature) is avoided, the protection effect is good, the continuity of production can be ensured, and the production cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a hydraulic schematic diagram of a hydraulic control device that can be used for motor protection according to the present utility model;
fig. 2 is a schematic structural view of a hydraulic control device capable of being used for motor protection according to the present utility model;
in the figure: 100. a hydraulic control device that can be used for motor protection; 1. an oil inlet passage; 2. a direction control device; 3. an oil outlet channel; 4. a hydraulic damper; 5. a first oil return passage; 6. a second oil return passage; 7. a pressure control part; 8. a pilot valve; 9. a solenoid valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a hydraulic control device for motor protection, which solves the problems in the prior art, has a good motor protection effect, can ensure the continuity of production, and saves the production cost.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-2, the present utility model provides a hydraulic control device 100 capable of being used for motor protection, comprising an oil inlet channel 1, a direction control device 2, an oil outlet channel 3, a hydraulic damper 4 and a first oil return channel 5, wherein the hydraulic damper 4 is provided with a damping hole, the oil inlet channel 1 and the oil outlet channel 3 are respectively communicated with an oil inlet and an oil outlet of the direction control device 2, the direction control device 2 can enable oil to flow from the oil inlet channel 1 to the oil outlet channel 3 and can prevent the oil from flowing from the oil outlet channel 3 to the oil inlet channel 1, the oil inlet channel 1 and the first oil return channel 5 are respectively communicated with an oil inlet and an oil outlet of the hydraulic damper 4, the hydraulic damper 4 can enable the oil to flow from the oil inlet channel 1 to the first oil return channel 5, and the first oil return channel 5 is used for being communicated with an oil tank. It should be noted that the structure of the hydraulic damper 4 is a prior art, and will not be described here.
The damping hole of the hydraulic damper 4 can enable oil to flow from the oil inlet of the oil inlet channel 1 to the first oil return port of the first oil return channel 3, so that oil return is realized, and as the damping hole has smaller flow area relative to the oil flow channels (the oil inlet channel 1, the oil outlet channel 3 and the like) in the working circuit, less oil can only be allowed to pass through; in a normal working state, the motor drives the oil pump to rotate, oil is fed from the oil inlet of the oil feeding channel 1 and is discharged from the oil outlet of the oil discharging channel 3 through the direction control device 2, so that normal hydraulic action is realized, and at the moment, only a small amount of oil is damped Kong Huiyou, so that the normal operation of a hydraulic system is not influenced; when the motor runs at a low speed due to unstable voltage and the like, the flow speed of oil between the oil inlet channel 1 and the oil outlet channel 3 is low, the oil is insufficient to be discharged from the oil outlet of the oil outlet channel 3, at the moment, the damping hole can allow a small amount of oil in the oil inlet channel 1 to flow back to the first oil return channel 5, and overload of the motor can be reduced to a certain extent, so that the motor is prevented from being burnt. According to the utility model, the hydraulic damper 4 is added in the hydraulic control device to realize motor protection, false triggering of overheat protection caused by environment abnormality (high temperature) is avoided, the protection effect is good, the continuity of production can be ensured, and the production cost is saved.
In this embodiment, the oil tank further comprises an overflow valve group and a second oil return channel 6, wherein an oil inlet and an oil outlet of the overflow valve group are respectively communicated with the oil inlet channel 1 and the second oil return channel 6, and the second oil return channel 6 is used for being communicated with the oil tank. When the oil supply pipeline between the oil inlet channel 1 and the oil outlet channel 3 is in a high-pressure state for a long time, the overflow valve group is opened, the oil inlet channel 1 is communicated with the second oil return channel 6, and besides the oil flows from the oil inlet channel 1 to the oil outlet channel 3, the oil flows back to the oil tank through the overflow valve group and the second oil return channel 6, so that unloading is realized, and a hydraulic system is protected. It should be noted that, when an instantaneous high pressure occurs in the oil supply line (which is insufficient to open the relief valve group), protection may be provided only by the hydraulic damper 4, specifically: when instantaneous high pressure occurs in the oil supply pipeline, the flow speed of the oil passing through the damping hole of the hydraulic damper 4 is increased, more oil can return to the oil tank through the damping hole, so that the oil pressure in the oil supply pipeline is reduced to a certain extent, and the hydraulic system is further protected.
In this embodiment, the overflow valve group includes a pressure control part 7, a pilot valve 8 and a solenoid valve 9, an oil inlet of the solenoid valve 9 is communicated with the oil inlet channel 1, a control port of the pressure control part 7 and an oil inlet of the pilot valve 8, an oil return port of the solenoid valve 9 is communicated with the second oil return channel 6, a first working oil port of the solenoid valve 9 is communicated with the second oil return channel 6, when the solenoid valve 9 is opened, oil can flow back to the second oil return channel 6 from the oil inlet of the solenoid valve 9 and the first working oil port of the solenoid valve 9, and when the solenoid valve 9 is closed, oil can be prevented from flowing back to the second oil return channel 6 via the solenoid valve 9; an oil inlet of the pilot valve 8 is communicated with the oil inlet channel 1, an oil return port of the pilot valve 8 is communicated with the second oil return channel 6, and when the electromagnetic valve 9 is closed and the pilot valve 8 is opened, oil can flow back to the second oil return channel 6 from the oil inlet channel 1 through the oil inlet of the pilot valve 8 and the oil return port of the pilot valve 8; the oil inlet of the pressure control part 7 is communicated with the oil inlet channel 1, the oil return port of the pressure control part 7 is communicated with the second oil return channel 6, the control port of the pressure control part 7 is communicated with a pipeline between the pilot valve 8 and the oil inlet channel 1, the pressure control part 7 can enable oil to flow back to the second oil return channel 6 from the oil inlet channel 1 through the oil inlet of the pressure control part 7 and the oil return port of the pressure control part 7 when the solenoid valve 9 is closed and the pilot valve 8 is opened, and the pressure control part 7 can prevent oil from flowing back to the second oil return channel 6 from the oil inlet channel 1 through the pressure control part 7 when the pilot valve 8 is closed.
When the system works, the electromagnetic valve 9 is powered on and is in a closed state, so that oil is prevented from returning to the oil tank through the electromagnetic valve 9; on the basis, when the oil supply pipeline between the oil inlet channel 1 and the oil outlet channel 3 is in a high-pressure state for a long time, the pressure at the oil inlet of the pilot valve 8 is increased, the pilot valve 8 is opened, oil entering from the oil inlet channel 1 returns to the oil tank through the pilot valve 8, at the moment, the pressure at the control port of the pressure control part 7 is reduced, the pressure control part 7 is opened, the oil entering from the oil inlet channel 1 returns to the oil tank through the pressure control part 7, and equipment faults or accidents caused by overlarge pressure in the system are avoided. When the pilot valve 8 is closed, the pressure control member 7 is closed, and oil cannot return to the tank via the pressure control member 7. When the system is stopped, as shown in fig. 1, the electromagnetic valve 9 is powered off, the oil inlet of the electromagnetic valve 9 is communicated with the first working oil port of the electromagnetic valve 9, and oil returns to the oil tank through the electromagnetic valve 9.
In this embodiment, the direction control device 2 is a check valve or a hydraulic control cover plate.
In this embodiment, the pilot valve 8 is an overflow valve.
In this embodiment, the solenoid valve 9 is a two-position four-way solenoid valve 9.
In this embodiment, the pressure control member 7 is a hydraulic control cover plate.
In this embodiment, the aperture of the damping hole of the hydraulic damper 4 is 0.8mm-1mm, and the aperture is smaller, so that when the hydraulic system operates normally, less oil flows back to the oil tank from the damping hole, and enough oil is discharged through the oil outlet channel 3, and normal hydraulic control is not affected.
In this embodiment, as shown in fig. 2, a third oil return channel is disposed on a housing of the hydraulic control device 100 for motor protection, an oil inlet of the third oil return channel is communicated with the liquid inlet channel 1, and an oil outlet of the third oil return channel is communicated with an oil inlet of the damping hole; the shell of the hydraulic control device 100 protected by the motor is provided with a mounting hole, the central line of the mounting hole is preferably perpendicular to the central line of the first oil return channel 5 and the central line of the third oil return channel, after the hydraulic damper 4 is assembled to the mounting hole, an oil inlet and an oil outlet of a damping hole of the hydraulic damper 4 can be respectively communicated with the third oil return channel and the first oil return channel 5, two ends of the outer wall of the hydraulic damper 4 are in sealing connection with two ends of the mounting hole, and oil is prevented from flowing out from the mounting hole. Simple structure, low cost, convenient installation and wide application.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (8)
1. A hydraulic control device usable for motor protection, characterized in that: the hydraulic damper is provided with a damping hole, the oil inlet channel and the oil outlet channel are respectively communicated with an oil inlet and an oil outlet of the direction control device, the direction control device can enable oil to flow from the oil inlet channel to the oil outlet channel and prevent the oil from flowing from the oil outlet channel to the oil inlet channel, the oil inlet channel and the first oil return channel are respectively communicated with an oil inlet and an oil outlet of the damping hole, and the damping hole can enable the oil to flow from the oil inlet channel to the first oil return channel which is used for being communicated with an oil tank.
2. The hydraulic control apparatus usable for motor protection according to claim 1, wherein: the oil inlet and the oil outlet of the overflow valve group are respectively communicated with the oil inlet channel and the second oil return channel, and the second oil return channel is used for being communicated with the oil tank.
3. The hydraulic control apparatus usable for motor protection according to claim 2, wherein: the overflow valve group comprises a pressure control component, a pilot valve and an electromagnetic valve, wherein an oil inlet of the electromagnetic valve is communicated with the oil inlet channel, a control port of the pressure control component and an oil inlet of the pilot valve, an oil return port of the electromagnetic valve is communicated with the second oil return channel, a first working oil port of the electromagnetic valve is communicated with the second oil return channel, when the electromagnetic valve is opened, oil can flow back to the second oil return channel from the oil inlet of the electromagnetic valve and the first working oil port of the electromagnetic valve, and when the electromagnetic valve is closed, the oil can be prevented from flowing back to the second oil return channel through the electromagnetic valve;
An oil inlet of the pilot valve is communicated with the oil inlet channel, an oil return port of the pilot valve is communicated with the second oil return channel, and when the electromagnetic valve is closed and the pilot valve is opened, the oil can flow back to the second oil return channel from the oil inlet channel through the oil inlet of the pilot valve and the oil return port of the pilot valve;
The oil inlet of the pressure control part is communicated with the oil inlet channel, the oil return port of the pressure control part is communicated with the second oil return channel, the control port of the pressure control part is communicated with a pipeline between the pilot valve and the oil inlet channel, the pressure control part can enable oil to flow back to the second oil return channel from the oil inlet channel through the oil inlet of the pressure control part and the oil return port of the pressure control part when the solenoid valve is closed and the pilot valve is opened, and the pressure control part can prevent oil from flowing back to the second oil return channel from the oil inlet channel through the pressure control part when the pilot valve is closed.
4. A hydraulic control device usable for motor protection according to any one of claims 1-3, characterized in that: the direction control device is a one-way valve or a hydraulic control cover plate.
5. A hydraulic control device usable for motor protection as claimed in claim 3, wherein: the pilot valve is an overflow valve.
6. A hydraulic control device usable for motor protection as claimed in claim 3, wherein: the electromagnetic valve is a two-position four-way electromagnetic valve.
7. A hydraulic control device usable for motor protection as claimed in claim 3, wherein: the pressure control part is a hydraulic control cover plate.
8. A hydraulic control device usable for motor protection according to any one of claims 1-3, characterized in that: the aperture of the damping hole of the hydraulic damper is 0.8mm-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323341891.0U CN221462663U (en) | 2023-12-07 | 2023-12-07 | Hydraulic control device capable of being used for motor protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323341891.0U CN221462663U (en) | 2023-12-07 | 2023-12-07 | Hydraulic control device capable of being used for motor protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221462663U true CN221462663U (en) | 2024-08-02 |
Family
ID=92345782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323341891.0U Active CN221462663U (en) | 2023-12-07 | 2023-12-07 | Hydraulic control device capable of being used for motor protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221462663U (en) |
-
2023
- 2023-12-07 CN CN202323341891.0U patent/CN221462663U/en active Active
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