CN114439721A - Multi-pump servo drive synchronous hydraulic power device of injection molding machine - Google Patents
Multi-pump servo drive synchronous hydraulic power device of injection molding machine Download PDFInfo
- Publication number
- CN114439721A CN114439721A CN202210111853.7A CN202210111853A CN114439721A CN 114439721 A CN114439721 A CN 114439721A CN 202210111853 A CN202210111853 A CN 202210111853A CN 114439721 A CN114439721 A CN 114439721A
- Authority
- CN
- China
- Prior art keywords
- pump
- servo motor
- injection molding
- main pump
- slave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 55
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 31
- 239000003921 oil Substances 0.000 claims description 72
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a multi-pump servo drive synchronous hydraulic power device of an injection molding machine, which is provided with a main pump, a slave pump, a main pump servo motor, a slave pump servo motor and a control part, wherein the control part is electrically connected with the main pump servo motor and the slave pump servo motor, so that the closed-loop control of the main pump can be performed, and simultaneously, the slave pump servo motor is synchronously controlled according to working parameters of the main pump to drive the slave pump, thereby solving the problem that the start, stop and speed of the multiple pumps in a multi-pump confluence loop of the traditional injection molding machine cannot be completely synchronous; the device also replaces the traditional check valve which is independently arranged in each group of loops with the shared overflow valve, thereby avoiding the additional pressure loss and ineffective heat loss caused by the check valve, improving the efficiency of the hydraulic system and having obvious cost advantage compared with the traditional arrangement mode of the check valve; meanwhile, the overflow valve is not isolated by a check valve, so that the pressure of the whole hydraulic system is safely limited, and the safety of the whole system is improved.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems, and particularly relates to a multi-pump servo drive synchronous hydraulic power device of an injection molding machine.
Background
Based on cost considerations of drive and hydraulic component technologies, two or more sets of drive pumps are often considered for larger tonnage injection molding machines to supply liquid to the injection molding machine hydraulic system. Due to the development of servo technology in recent years, the power unit of the servo drive hydraulic pump gradually replaces the application of the traditional three-phase asynchronous motor drive pump station, and the application of the power unit in the industry of injection molding machines is wider and wider.
However, in the aspect of pump head control of a power unit, a hydraulic system driven by a common three-phase asynchronous motor is still carried on the market, the redundancy of the hydraulic system is complex, the cost advantage is not only avoided, but also the energy-saving effect is discounted, and the superiority of a servo driving system cannot be fully reflected.
The traditional injection molding machine is provided with a check valve above each hydraulic pump, and an overflow valve is arranged between an oil outlet of the hydraulic pump and the check valve to prevent the check valve from being blocked. As shown in fig. 4, the multi-pump confluence loop of the conventional injection molding machine is: the oil suction ports S of the hydraulic pump 4a and the hydraulic pump 4b respectively suck oil from the oil tank 1 through the oil suction filter 2a and the oil suction filter 2b under the drive of the servo motors 3a and 3b, then the oil is output from the pressure port P of the hydraulic pump and collected together through the check valve 5a and the check valve 5b to be conveyed to a downstream hydraulic control system and an executing mechanism, and the overflow valve 6a and the overflow valve 6b limit the pressure of the oil outlet of each hydraulic pump to prevent the pumps from being overloaded.
The reason why a check valve and an overflow valve must be designed for each pump outlet of the loop is that a servo motor of each hydraulic pump cannot be well started and stopped synchronously and has synchronous speed, a pump which is quickly started is quickly pressurized in advance under the action of different starting acceleration and moment of different servo motors of the plurality of hydraulic pumps, and a pump which is slowly started is backflushed by the pressure and flow which are established by the quickly started pump if the pump is not protected by the check valve, so that overload shutdown is caused, and even the hydraulic pumps and the servo motors are damaged.
Disclosure of Invention
In order to solve the problems, the invention provides a synchronous control servo drive pump set, which adopts the following technical scheme:
the invention provides a multi-pump servo drive synchronous hydraulic power device of an injection molding machine, which is used for providing hydraulic power oil for a hydraulic system of the injection molding machine and is characterized by comprising the following components: the main pump is provided with a main pump oil suction port connected with the hydraulic oil tank and a main pump oil outlet connected with the hydraulic system of the injection molding machine; the slave pump is provided with a slave pump pumping oil port connected with the hydraulic oil tank and a slave pump pumping oil port connected with a hydraulic system of the injection molding machine; the main pump servo motor is used for driving a main pump to provide hydraulic power oil in a hydraulic oil tank for a hydraulic system of the injection molding machine; the slave pump servo motor is used for driving the slave pump to provide hydraulic power oil in a hydraulic oil tank for a hydraulic system of the injection molding machine; and the control part is electrically connected with the main pump servo motor and the slave pump servo motor and is used for realizing closed-loop control on the main pump and controlling the slave pump servo motor according to the working parameters of the main pump.
The invention provides a multi-pump servo drive synchronous hydraulic power device of an injection molding machine, which can also have the technical characteristics that a pressure sensor is arranged above an oil outlet of a main pump and used for acquiring an actual pressure value when the main pump works, a control part is provided with a storage unit, a receiving unit, a pressure judging unit, a parameter adjusting unit and a pump control unit, the storage unit stores a preset pressure value, the receiving unit receives an actual working parameter of a servo motor of the main pump from the servo motor of the main pump and receives an actual pressure value corresponding to the actual working parameter from the pressure sensor, the pressure judging unit carries out comparison judgment according to the actual pressure value and the preset pressure value, the parameter adjusting unit adjusts the actual working parameter of the servo motor of the main pump according to a judgment result of the pressure judging unit until the actual pressure value is consistent with the preset pressure value, and the pump control unit controls a slave pump servo motor by utilizing the actual working parameter, thereby synchronously controlling the servo motor of the main pump and the servo motor of the slave pump.
The multi-pump servo drive synchronous hydraulic power device of the injection molding machine provided by the invention can also have the technical characteristics that the working parameters at least comprise rotating speed values.
The multi-pump servo drive synchronous hydraulic power device of the injection molding machine, provided by the invention, also has the technical characteristics that a main pump and a slave pump are connected with a hydraulic oil tank through oil pipes, and the oil pipes are provided with oil absorption filters.
The multi-pump servo drive synchronous hydraulic power device of the injection molding machine provided by the invention can also have the technical characteristics that an overflow valve is arranged above an oil outlet pipe which is connected with an oil outlet of the main pump and an oil outlet of the slave pump and is used for limiting the pressure of the oil outlet of the main pump and the oil outlet of the slave pump.
Action and Effect of the invention
According to the multi-pump servo drive synchronous hydraulic power device of the injection molding machine, the device is provided with the main pump, the slave pump, the main pump servo motor, the slave pump servo motor and the control part, because the control part is electrically connected with the main pump servo motor and the slave pump servo motor, the closed-loop control can be carried out on the main pump, and meanwhile, the slave pump servo motor is synchronously controlled according to the working parameters of the main pump to drive the slave pump, so that the problem that the starting, stopping and speed of the multiple pumps in the multi-pump confluence loop of the traditional injection molding machine cannot be completely synchronous is solved. And because the device replaces the check valve which is arranged independently in each group of loops in the prior art with the shared overflow valve, the problems of additional pressure loss and ineffective heat loss caused by the check valve are solved, the efficiency of the hydraulic system is improved, and compared with the arrangement mode of the check valve of the prior injection molding machine, the device also has obvious cost advantage.
Drawings
FIG. 1 is a schematic structural diagram of a multi-pump servo drive synchronous hydraulic power device of an injection molding machine in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a control section in the embodiment of the present invention;
FIG. 3 is a flow chart of the operation of the multi-pump servo drive synchronous hydraulic power device of the injection molding machine in the embodiment of the invention;
fig. 4 is a schematic structural view of a conventional multi-pump driving power unit of an injection molding machine.
Reference numerals:
the multi-pump servo drive synchronous hydraulic power device 100 of the injection molding machine: a hydraulic oil tank 1; a main pump 2; a main pump suction port 21; a main pump oil outlet 22; from the pump 3; a slave pump oil suction port 31; an oil outlet 32 from the pump; a main pump servo motor 4; a slave pump servo motor 5; an overflow valve 6; a pressure sensor 7; an oil absorption filter 8.
Detailed Description
In order to make the technical means, creation features, achievement purposes and effects of the invention easy to understand, the multi-pump servo drive synchronous hydraulic power device of the injection molding machine is specifically described below with reference to the embodiments and the accompanying drawings.
< example >
FIG. 1 is a schematic structural diagram of a multi-pump servo drive synchronous hydraulic power device of an injection molding machine in an embodiment of the invention.
As shown in fig. 1, a multi-pump servo drive synchronous hydraulic power unit 100 of an injection molding machine is provided in the injection molding machine for supplying hydraulic power oil to a hydraulic system of the injection molding machine.
The multi-pump servo drive synchronous hydraulic power device 100 of the injection molding machine of the embodiment has a hydraulic oil tank 1, a main pump 2, a slave pump 3, a main pump servo motor 4, a slave pump servo motor 5, an overflow valve 6, a pressure sensor 7, an oil suction filter 8 and a control part (not shown in the figure).
The main pump 2 has a main pump oil suction port 21 connected to the hydraulic oil tank 1 and a main pump oil outlet port 22 connected to the hydraulic system of the injection molding machine. The main pump 2 sucks hydraulic power oil from the hydraulic oil tank 1 through a main pump oil suction port 21, and then outputs the sucked hydraulic power oil through a main pump oil outlet 22.
The main pump servo motor 4 is used for driving the main pump 2 to provide hydraulic power oil in the hydraulic oil tank 1 for the hydraulic system of the injection molding machine through a main pump oil suction port 21 and a main pump oil outlet port 22.
The slave pump 3 has a slave pump suction port 31 connected to the hydraulic oil tank 1 and a slave pump discharge port 32 connected to the hydraulic system of the injection molding machine. The hydraulic power oil is drawn from the hydraulic oil tank 1 from the pump 3 through the pump suction port 31, and then is outputted through the pump discharge port 32.
The slave pump servo motor 5 is used to drive the slave pump 3 to supply the hydraulic power oil in the hydraulic oil tank 1 to the hydraulic system of the injection molding machine through the slave pump suction port 31 and the slave pump discharge port 32.
The oil outlet pipe is connected in parallel with the main pump oil outlet 22 and the slave pump oil outlet 32, and confluently outputs the hydraulic power oil output from the main pump oil outlet 22 and the slave pump oil outlet 32 to a working device (not shown in the figure) of a hydraulic system of the injection molding machine.
The oil outlet pipe is provided with an overflow valve 6, and the overflow valve 6 is used for limiting the pressure of oil outlets of a plurality of hydraulic pumps of the injection molding machine and preventing the pumps from overloading.
The pressure sensor 7 is arranged on an oil pipe above the oil outlet 22 of the main pump and used for acquiring the actual pressure value of the main pump 2 during working.
The oil absorption filter 8 is arranged on an oil pipe of each hydraulic pump connected with the hydraulic oil tank 1 so as to ensure the cleanness of hydraulic power oil and effectively control impurities and pollutants in a hydraulic system.
Fig. 2 is a schematic structural diagram of the control unit in the embodiment of the present invention. (the device 100 in FIG. 2 shows only a part of the structure connected to the control section 10.)
As shown in fig. 2, the control section 10 has a storage unit 101, a receiving unit 102, a pressure judging unit 103, a parameter adjusting unit 104, and a pump control unit 105.
The storage unit 101 stores a preset pressure value, and the preset pressure value is preset according to the flow of the hydraulic power oil required by the hydraulic system. The preset mode includes parameter presetting in factory shipment, input presetting in an operation terminal of the control part during manual setting, and the like.
The receiving unit 102 is connected to the main pump servo motor 4 and the pressure sensor 7, and is configured to receive an actual working parameter of the main pump servo motor 4, and also receive an actual pressure value corresponding to the actual working parameter, which is acquired by the pressure sensor 7.
The actual operating parameters include a rotating speed value, a torque value and the like.
The pressure determination unit 103 compares the actual pressure value with a preset pressure value to generate a determination result of the actual pressure value and the preset pressure value, for example, the actual pressure value is greater than the preset pressure value or the actual pressure value is less than the preset pressure value or the actual pressure value is equal to the preset pressure value.
The parameter adjusting unit 104 is connected to the main pump servo motor 4, and is configured to adjust an actual working parameter of the main pump servo motor 4 according to a determination result of the pressure determining unit 103 until an actual pressure value is close to or equal to a preset pressure value, thereby implementing closed-loop control on the main pump 2. Specifically, the method comprises the following steps:
when the actual pressure value is greater than the preset pressure value, the parameter adjusting unit 104 performs increasing adjustment on the motor rotation speed value and the torque value corresponding to the current actual pressure value; when the actual pressure value is smaller than the preset pressure value, the parameter adjusting unit reduces and adjusts the motor rotating speed value and the torque value corresponding to the current actual pressure value; when the actual pressure value is equal to the preset pressure value, the parameter adjusting unit 104 does not make any adjustment.
The pump control unit 105 is connected to the slave pump servo motor 5, and is configured to control the slave pump servo motor 5 and the master pump servo motor 4 to maintain the same rotation speed and working state according to the actual working parameters adjusted by the parameter adjusting unit 104, so as to implement synchronous control of the master pump 2 and the slave pump 3.
Therefore, the control part 10 in this embodiment can control the slave pump 3 by using a master-slave control logic in a parallel manner, and control the slave pump servo motor 5 according to the actual working parameters of the master pump 2, thereby realizing the synchronization of the start and stop of the master pump servo motor 4 and the slave pump servo motor 5 and the synchronization of the rotation speed.
FIG. 3 is a flow chart of the operation of the multi-pump servo drive synchronous hydraulic power device of the injection molding machine in the embodiment of the invention.
As shown in fig. 3, the operation flow of the multi-pump servo-driven synchronous hydraulic power device 100 of the injection molding machine of the present embodiment is as follows:
step S1, starting the injection molding machine, and controlling the main pump servo motor 4 and the slave pump servo motor 5 to respectively drive the main pump 2 and the slave pump 3 to work by the control part 10 according to a preset pressure value;
step S2, the pressure sensor 7 acquires an actual pressure value of the main pump oil outlet 22, and meanwhile, the receiving unit 102 receives the actual pressure value and receives an actual working parameter of the main pump servo motor 4 corresponding to the actual pressure value;
step S3, the pressure judgment unit 103 judges whether the actual pressure value is not equal to the preset pressure value;
step S4, when the actual pressure value is not equal to the preset pressure value, the parameter adjusting unit 104 adjusts the actual working parameter of the main pump servo motor 4 according to the determination result until the pressure determining unit 103 determines that the actual pressure value is equal to the preset pressure value;
in step S5, the pump control unit 105 controls the pump drive from the pump servo motor 5 at the same rotational speed with the actual operating parameters of the main pump servo motor 4.
Examples effects and effects
According to the multi-pump servo drive synchronous hydraulic power device of the injection molding machine, the control part is electrically connected with the main pump servo motor and the slave pump servo motor, closed-loop control can be performed on the main pump, and meanwhile the slave pump servo motor is synchronously controlled to drive the slave pump according to working parameters of the main pump, so that the problem that starting and stopping of multiple pumps and the speed cannot be completely synchronous in a multi-pump confluence loop of the traditional injection molding machine is solved. And because the device replaces the check valve which is arranged independently in each group of loops in the prior art with the shared overflow valve, the problems of additional pressure loss and ineffective heat loss caused by the check valve are solved, the efficiency of the hydraulic system is improved, and compared with the arrangement mode of the check valve of the prior injection molding machine, the device also has obvious cost advantage. In addition, the overflow valve in the embodiment has no partition of the check valve, so that the pressure of the whole hydraulic system is safely limited, and the safety of the whole system is improved.
In the embodiment, the loop is not provided with the one-way valve, so that the hydraulic pump driven by the servo motor can rotate reversely, and the pressure relief function of the system and the pressure control of the system are realized. The traditional servo driving hydraulic circuit only can limit the highest pressure of the system by using an overflow valve, and the function of adjusting the pressure up and down is difficult to realize.
The above-described embodiments are merely illustrative of specific embodiments of the present invention, and the present invention is not limited to the description of the above-described embodiments.
In the above embodiment, the number of the slave pumps and the slave pump servo motors is one, and in practical application, the number of the slave pumps and the corresponding slave pump servo motors may be plural, and the control part is connected to the master pump servo motor and the plural slave pump servo motors, so that the technical effects of the present invention can be achieved.
Claims (5)
1. The utility model provides a synchronous hydraulic power unit of injection molding machine multi-pump servo drive for provide hydraulic power oil to injection molding machine hydraulic system, its characterized in that includes:
the main pump is provided with a main pump oil suction port connected with a hydraulic oil tank and a main pump oil outlet connected with the hydraulic system of the injection molding machine;
the slave pump is provided with a slave pump pumping oil port connected with a hydraulic oil tank and a slave pump pumping oil port connected with the hydraulic system of the injection molding machine;
the main pump servo motor is used for driving the main pump to provide hydraulic power oil in the hydraulic oil tank for the hydraulic system of the injection molding machine;
the slave pump servo motor is used for driving the slave pump to provide hydraulic power oil in the hydraulic oil tank for the hydraulic system of the injection molding machine; and
and the control part is electrically connected with the main pump servo motor and the slave pump servo motor and is used for realizing closed-loop control on the main pump and controlling the slave pump servo motor according to the working parameters of the main pump.
2. The multi-pump servo drive synchronous hydraulic power unit of the injection molding machine according to claim 1, characterized in that:
wherein, a pressure sensor is arranged above the oil outlet of the main pump and is used for collecting the actual pressure value when the main pump works,
the control section has a storage unit, a receiving unit, a pressure judging unit, a parameter adjusting unit, and a pump control unit,
the storage unit stores a preset pressure value,
the receiving unit receives actual working parameters of the main pump servo motor from the main pump servo motor and receives actual pressure values corresponding to the actual working parameters from the pressure sensor,
the pressure judging unit compares and judges the actual pressure value with the preset pressure value,
the parameter adjusting unit adjusts the actual working parameters of the main pump servo motor according to the judgment result of the pressure judging unit until the actual pressure value is consistent with the preset pressure value,
the pump control unit controls the slave pump servo motor by using the actual working parameter, thereby synchronously controlling the master pump servo motor and the slave pump servo motor.
3. The multi-pump servo drive synchronous hydraulic power unit of the injection molding machine according to claim 2, characterized in that:
wherein the actual operating parameter at least comprises a rotational speed value.
4. The multi-pump servo drive synchronous hydraulic power device of the injection molding machine according to claim 1, characterized in that:
the main pump and the slave pump are connected with the hydraulic oil tank through oil pipes, and oil absorption filters are arranged on the oil pipes.
5. The multi-pump servo drive synchronous hydraulic power unit of the injection molding machine according to claim 1, characterized in that:
and an overflow valve is arranged above an oil outlet pipe connecting the oil outlet of the main pump and the oil outlet of the slave pump and used for limiting the pressure of the oil outlet of the main pump and the pressure of the oil outlet of the slave pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111853.7A CN114439721A (en) | 2022-01-27 | 2022-01-27 | Multi-pump servo drive synchronous hydraulic power device of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111853.7A CN114439721A (en) | 2022-01-27 | 2022-01-27 | Multi-pump servo drive synchronous hydraulic power device of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114439721A true CN114439721A (en) | 2022-05-06 |
Family
ID=81372399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210111853.7A Pending CN114439721A (en) | 2022-01-27 | 2022-01-27 | Multi-pump servo drive synchronous hydraulic power device of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114439721A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201382044Y (en) * | 2009-03-11 | 2010-01-13 | 江门市蒙德电气有限公司 | Hydraulic multi-pump parallel control device for servo |
| CN101623920A (en) * | 2009-07-30 | 2010-01-13 | 桂林星辰科技有限公司 | Energy-saving servo hydraulic control system for injection machine and control method thereof |
| CN102582054A (en) * | 2011-01-12 | 2012-07-18 | 广州博创机械有限公司 | Power system of large-sized servo injection molding machine |
-
2022
- 2022-01-27 CN CN202210111853.7A patent/CN114439721A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201382044Y (en) * | 2009-03-11 | 2010-01-13 | 江门市蒙德电气有限公司 | Hydraulic multi-pump parallel control device for servo |
| CN101623920A (en) * | 2009-07-30 | 2010-01-13 | 桂林星辰科技有限公司 | Energy-saving servo hydraulic control system for injection machine and control method thereof |
| CN102582054A (en) * | 2011-01-12 | 2012-07-18 | 广州博创机械有限公司 | Power system of large-sized servo injection molding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201363332Y (en) | Large inertia variable frequency volume bypass throttling speed governing system | |
| CN104976170B (en) | Hydraulic pump station with energy-saving buffering protection device | |
| CN101691878A (en) | Hydraulic pump flow regulating device | |
| CN106088208A (en) | Excavator revolution hydraulic control system | |
| US20220010792A1 (en) | Hydraulic system | |
| CN114439721A (en) | Multi-pump servo drive synchronous hydraulic power device of injection molding machine | |
| CN103669463A (en) | Acceleration control method and device of hydraulic rotation system and excavator | |
| CN106151135A (en) | Concrete pumping hydraulic control system and concrete pumping machine | |
| CN103389686B (en) | Method for controlling pump truck and pump truck | |
| CN215293098U (en) | Hydraulic system oil circuit cooling structure | |
| CN212225638U (en) | Double-power-source opening-closing type double-loop rotor driving system and milling machine | |
| CN103170531A (en) | Electro-hydraulic synchronization numerically controlled bending machine servo pump driving device | |
| CN203265338U (en) | Servo pump driving device for electro-hydraulic synchronous numerical-control bending machine | |
| CN107420356A (en) | A kind of energy-saving hydraulic pumping plant for TRT fast cut valves | |
| CN210343894U (en) | Hydraulic system with total power control | |
| CN206344377U (en) | Injection machine energy-saving type hydraulic system | |
| CN206754017U (en) | A kind of energy-saving hydraulic pumping plant for TRT fast cut valves | |
| CN220909984U (en) | Gear pump oil suction system and engineering machinery | |
| CN217152508U (en) | Intelligent control transient response energy-saving hydraulic station | |
| CN100422557C (en) | Control method for energy saving of hydraulic machinery or raising prodn. efficiency | |
| CN210422915U (en) | Water feeding pump system with variable-speed front pump | |
| JPH0228721B2 (en) | SHASHUTSUYUATSUSOCHINIOKERUKAFUKABOSHISOCHI | |
| CN112983879B (en) | Starting control method of high-speed turbine vacuum pump and vacuum pumping system | |
| CN210623234U (en) | Hydraulic transmission system applied to feeding device of garden crusher | |
| CN209340253U (en) | A kind of hydraulic station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |