CN214092505U - Universal hydraulic jacking device - Google Patents
Universal hydraulic jacking device Download PDFInfo
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- CN214092505U CN214092505U CN202023271611.XU CN202023271611U CN214092505U CN 214092505 U CN214092505 U CN 214092505U CN 202023271611 U CN202023271611 U CN 202023271611U CN 214092505 U CN214092505 U CN 214092505U
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- hydraulic pump
- pressure sensor
- control valve
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Abstract
The utility model discloses a universal hydraulic jacking device, which comprises a motor, a hydraulic pump, a pressure sensor, an electromagnetic valve, a one-way control valve and a hydraulic cylinder, wherein the pressure sensor is positioned at one side of the outlet of the hydraulic pump, the electromagnetic valve is positioned on the output oil circuit of the hydraulic pump, and the one-way control valve is positioned between the electromagnetic valve and the hydraulic cylinder; the motor is used for driving the hydraulic pump, and the hydraulic pump is used for driving hydraulic oil; the pressure sensor is used for detecting the outlet pressure of the hydraulic pump; the electromagnetic valve is used for controlling a hydraulic oil circuit, the one-way control valve is connected with the hydraulic control unit, the pressure of the system is detected during rising by adding the pressure sensor, the rotating speed of the motor is controlled, and the motor works on a constant power curve, so that the hydraulic cylinder achieves the maximum lifting speed under the condition that the motor is not overloaded or the power is limited; when the hydraulic cylinder descends, the one-way control valve is controlled to throttle according to the system pressure during ascending, and the hydraulic cylinder is ensured to fully supplement oil during descending, so that the hydraulic cylinder is prevented from being sucked to be empty, and the descending speed is ensured not to change along with the load.
Description
Technical Field
The utility model belongs to remove type equipment field, concretely relates to general hydraulic pressure jacking device.
Background
The hydraulic mode is commonly used on the mobile equipment to realize the jacking function, and the hydraulic pump and the motor generally have fixed rotating speeds, so that the motor cannot work in the optimal working range under different loads. When the load rises, if the load is larger, the power of the motor is larger, and if the load is smaller, the rotating speed of the motor is lower; when the hydraulic oil pressure sensor descends, if the load is large, the hydraulic oil pressure sensor descends too fast, if the load is small, the hydraulic oil pressure sensor descends too slowly, and the pressure of the hydraulic oil is not detected on the existing mobile equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a general hydraulic pressure jacking device to solve the problem that proposes in the above-mentioned background art, add pressure sensor in hydraulic pressure jacking device, be used for the pressure measurement of hydraulic oil.
In order to achieve the above object, the utility model provides a following technical scheme: the universal hydraulic jacking device comprises a motor, a hydraulic pump, a pressure sensor, an electromagnetic valve, a one-way control valve and a hydraulic cylinder, wherein the output end of the motor is connected with the hydraulic pump, the pressure sensor is positioned on one side of the outlet of the hydraulic pump, the electromagnetic valve is positioned on an output oil path of the hydraulic pump, and the one-way control valve is positioned between the electromagnetic valve and the hydraulic cylinder;
the motor is used for driving a hydraulic pump, and the hydraulic pump is used for driving hydraulic oil;
the pressure sensor is used for detecting the outlet pressure of the hydraulic pump;
the electromagnetic valve is used for controlling a hydraulic oil circuit, and the one-way control valve is connected with the hydraulic control unit.
Preferably, the hydraulic control unit is respectively connected with the motor, the one-way control valve and the pressure sensor.
Preferably, the hydraulic pump further comprises an overflow valve, and the overflow valve is connected with the hydraulic pump.
Preferably, the one-way control valve is controlled by a hydraulic control unit to control the opening size and the descending speed, and the hydraulic cylinder is used for jacking the load.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model comprises a motor, a hydraulic pump, a pressure sensor, an electromagnetic valve, a one-way control valve and a hydraulic cylinder, wherein the output end of the motor is connected with the hydraulic pump, the pressure sensor is positioned at one side of the outlet of the hydraulic pump, the electromagnetic valve is positioned on the output oil circuit of the hydraulic pump, and the one-way control valve is positioned between the electromagnetic valve and the hydraulic cylinder; the motor is used for driving a hydraulic pump, and the hydraulic pump is used for driving hydraulic oil; the pressure sensor is used for detecting the outlet pressure of the hydraulic pump; the electromagnetic valve is used for controlling a hydraulic oil circuit, and a pressure sensor is added in the connection of the one-way control valve and the hydraulic control unit to detect the pressure of the system during rising.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is the control topological diagram of the hydraulic system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the universal hydraulic jacking device comprises a motor 9, a hydraulic pump 8, a pressure sensor 6, an electromagnetic valve 5, a one-way control valve 4 and a hydraulic cylinder 2, wherein the output end of the motor 9 is connected with the hydraulic pump 8, the pressure sensor 6 is positioned on one side of the outlet of the hydraulic pump 8, the electromagnetic valve 5 is positioned on an output oil path of the hydraulic pump 8, and the one-way control valve 4 is positioned between the electromagnetic valve 5 and the hydraulic cylinder 2;
in the utility model, the motor 9 is used for driving the hydraulic pump 8, and the hydraulic pump 8 is used for driving the hydraulic oil; the pressure sensor 6 is used for detecting the outlet pressure of the hydraulic pump; the electromagnetic valve 5 is used for controlling a hydraulic oil circuit, and the one-way control valve is connected with the hydraulic control unit. Referring to fig. 2, the hydraulic control unit is connected to the motor, the one-way control valve, and the pressure sensor, respectively.
The utility model discloses in, still include overflow valve 7, overflow valve 7 links to each other with hydraulic pump 8.
The utility model discloses in, one-way control valve 4 is by hydraulic control unit control opening size for the falling speed of control pneumatic cylinder, pneumatic cylinder are used for the jacking load.
The following provides specific embodiments of the present invention
Example 1
Referring to fig. 1-2, a universal hydraulic jacking apparatus; the utility model adds a pressure sensor in the hydraulic jacking device, detects the system pressure when the hydraulic jacking device ascends, controls the rotating speed of the motor, and leads the motor to work on a constant power curve, thereby ensuring that the hydraulic cylinder reaches the maximum jacking speed under the condition that the motor does not overload or limit the power; when the hydraulic cylinder descends, the one-way control valve is controlled to throttle according to the system pressure during ascending, and the hydraulic cylinder is ensured to fully supplement oil during descending, so that the hydraulic cylinder is prevented from being sucked to be empty, and the descending speed is ensured not to change along with the load.
The specific implementation mode is as follows: the universal hydraulic jacking device comprises a motor 9, a hydraulic pump 8, a pressure sensor 6, an electromagnetic valve 5, a one-way control valve 4 and a hydraulic cylinder 2, wherein the motor 9 is used for driving the hydraulic pump 8, the hydraulic pump 8 is used for driving hydraulic oil, the pressure sensor 6 is used for detecting pump outlet pressure, the electromagnetic valve 5 is used for controlling a hydraulic oil circuit, the size of an opening of the one-way control valve 4 can be controlled by a hydraulic control unit and is used for controlling descending speed, and the hydraulic cylinder is used for jacking a load. The pressure sensor 6 detects the system pressure during rising, calculates the load, calculates the rotating speed of the hydraulic pump and the motor, controls the motor to output according to the calculated rotating speed, and enables the motor to work on a constant power curve, thereby ensuring that the hydraulic cylinder reaches the maximum jacking speed under the condition that the motor is not overloaded or the power is limited; when the hydraulic pump descends, the one-way control valve 4 communicated with the lower cavity of the hydraulic cylinder plays a throttling role to prevent the load from descending too fast, the pressure difference between two ends of the one-way control valve 4 needs to be equal to the system pressure when the load ascends, the one-way control valve is adjusted according to the pressure to keep the flow constant, namely the descending speed does not change along with the load, and the oil supplementing flow of the hydraulic pump and the rotating speed of the motor are calculated according to the descending speed.
In the present embodiment, the working principle is as follows: determining parameters of a hydraulic system, namely the known rated power PP (W) of a motor, the displacement c (ml) of a hydraulic pump, the efficiency eta 1 of the hydraulic pump, the efficiency eta 2 of a hydraulic cylinder, the number m of the hydraulic cylinders, the cylinder diameter d1(mm) of the hydraulic cylinder, the piston rod diameter d2(mm) of the hydraulic cylinder, a jacking stroke h, a gravity acceleration g and the pressure of a system during lifting which is detected by a pressure sensor to be P (MPa); calculating load M (Kg) ═ m eta 0P eta 1 eta 2 pi eta 3d12/4/g, and storing the calculated load in a memory of the controller on line; calculating a rising system flow Q1(ml/min) ═ 60 × PP × η 1/P, calculating a rising motor and hydraulic pump rotation speed n1(rpm) ═ Q1/c ═ 60 × PP × η 1)/(P × c), calculating the obtained motor rotation speed as a motor movement command, and sending the motor movement command to the motor through the servo driver; the required descending time is t(s), the system return oil flow Q2(ml/min) ═ m × h × pi × d12/4/t during descending is calculated, and the calculated flow is stored in a controller memory on line; if the hydraulic cylinder is required to descend according to the time t and the flow Q2, the pressure difference between the lower cavity of the hydraulic cylinder and the oil tank, namely the pressure difference between the two ends of the one-way control valve, is required to be equal to the system pressure during ascending, namely
One-way control valve capable of being calculated
The hydraulic control unit controls the size of the opening of the one-way control valve according to k;the hydraulic pump is used for supplementing oil to the upper cavity of the hydraulic cylinder during descending, the flow rate Q3(ml/min) of the system during descending is calculated to be 60 Xm Xh Xpi X (d12-d22)/4/t, the rotating speed n3(rpm) of the motor and the hydraulic pump during descending is calculated to be Q3/c to be 60 Xm Xh Xpi X (d12-d22)/4/t/c, and the rotating speed of the motor obtained through calculation is used as a motor movement command and is sent to the motor through a servo driver.
In this embodiment, during the lifting, the solenoid valve is in the left position, the motor and the hydraulic pump drive the hydraulic oil to enter the lower cavity of the hydraulic cylinder through the solenoid valve, the one-way control valve and the synchronous valve group, and the load is lifted. The upper cavity of the hydraulic cylinder returns oil and returns oil to the tank through the electromagnetic valve. The pressure sensor detects the system pressure, calculates the load and the system flow, calculates the motor rotating speed, and the hydraulic control unit controls the motor according to the obtained motor rotating speed.
When the hydraulic cylinder descends, the electromagnetic valve is on the right position, the motor and the hydraulic pump drive hydraulic oil to enter the upper cavity of the hydraulic cylinder through the electromagnetic valve, and the load descends. And returning oil in the lower cavity of the hydraulic cylinder through the synchronous valve group, the one-way control valve and the electromagnetic valve oil return box. The pressure sensor detects the system pressure, the system return oil flow and the one-way control valve k are calculated according to the descending time, and the hydraulic control unit controls the opening size of the one-way control valve according to k. And calculating the flow of the system, calculating the rotating speed of the motor, and controlling the motor by the hydraulic control unit according to the obtained rotating speed of the motor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. General hydraulic pressure jacking device, its characterized in that: the hydraulic control system comprises a motor, a hydraulic pump, a pressure sensor, an electromagnetic valve, a one-way control valve and a hydraulic cylinder, wherein the output end of the motor is connected with the hydraulic pump, the pressure sensor is positioned on one side of the outlet of the hydraulic pump, the electromagnetic valve is positioned on an output oil path of the hydraulic pump, and the one-way control valve is positioned between the electromagnetic valve and the hydraulic cylinder;
the motor is used for driving a hydraulic pump, and the hydraulic pump is used for driving hydraulic oil;
the pressure sensor is used for detecting the outlet pressure of the hydraulic pump;
the electromagnetic valve is used for controlling a hydraulic oil circuit, and the one-way control valve is connected with the hydraulic control unit.
2. The universal hydraulic jacking device of claim 1 wherein: and the hydraulic control unit is respectively connected with the motor, the one-way control valve and the pressure sensor.
3. The universal hydraulic jacking device of claim 1 wherein: the hydraulic pump also comprises an overflow valve, and the overflow valve is connected with the hydraulic pump.
4. The universal hydraulic jacking device of claim 1, wherein the one-way control valve is controlled in opening size by a hydraulic control unit for controlling the lowering speed of a hydraulic cylinder used for jacking a load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023271611.XU CN214092505U (en) | 2020-12-30 | 2020-12-30 | Universal hydraulic jacking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023271611.XU CN214092505U (en) | 2020-12-30 | 2020-12-30 | Universal hydraulic jacking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214092505U true CN214092505U (en) | 2021-08-31 |
Family
ID=77435121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023271611.XU Active CN214092505U (en) | 2020-12-30 | 2020-12-30 | Universal hydraulic jacking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214092505U (en) |
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2020
- 2020-12-30 CN CN202023271611.XU patent/CN214092505U/en active Active
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