CN220909985U - Gear pump oil suction system and engineering machinery - Google Patents
Gear pump oil suction system and engineering machinery Download PDFInfo
- Publication number
- CN220909985U CN220909985U CN202322565666.9U CN202322565666U CN220909985U CN 220909985 U CN220909985 U CN 220909985U CN 202322565666 U CN202322565666 U CN 202322565666U CN 220909985 U CN220909985 U CN 220909985U
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- gear pump
- oil
- pump
- booster
- gear
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- 239000003921 oil Substances 0.000 claims abstract description 96
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The utility model relates to the technical field of hydraulic pressure, in order to solve the problem that the existing gear pump cannot work at high rotation speed, the utility model constructs a gear pump oil suction system and engineering machinery, wherein the gear pump oil suction system comprises a gear pump, a gear pump driving motor for driving the gear pump, a hydraulic oil tank and a booster pump, wherein the booster pump is fixedly arranged on the gear pump, and an input shaft of the booster pump is connected with an input shaft of the gear pump; an oil inlet of the booster pump is connected with the hydraulic oil tank through an oil inlet pipe, and an oil outlet of the booster pump is connected with an oil inlet of the gear pump through an oil outlet pipe. In the utility model, the gear pump is connected with the oil tank through the booster pump oil way, and when the gear pump is directly driven to work at a high rotating speed by using the high-speed motor, the pressure of the oil inlet of the gear pump can be increased by the booster pump to avoid generating air pockets in the gear pump, thereby avoiding using the low-speed high-torque motor and reducing the cost.
Description
Technical Field
The utility model relates to the technical field of hydraulic pressure, in particular to a gear pump oil suction system and engineering machinery.
Background
On a work machine such as a loader, a gear pump is typically configured when it employs a fixed-volume hydraulic system. Gear pumps are typically rated for 2200 rpm and are suitable for diesel drive.
With the advent and widespread use of electric-powered construction machines, hydraulic pumps have been driven with electric motors. The hydraulic motor model selection is determined by the rotation speed and torque required by the hydraulic system, and in order to meet the rated rotation speed 2200 turns of the operation of the existing gear pump, a low-speed high-torque hydraulic motor is required to be selected.
The hydraulic motor is selected according to the rotation speed of the gear pump, the technical advantage of high rotation speed of the motor is not fully utilized, the rotation speed is 2200 revolutions at the highest, and the main reason is that a high-rotation speed pump suitable for engineering machinery is not provided.
The existing gear pump cannot be used at high speed, the volumetric efficiency is drastically reduced and the noise is drastically increased beyond the highest rotation speed; the main reasons are that the gear pump runs at a high speed, cavitation noise caused by insufficient oil absorption can be generated, and the volumetric efficiency is low. The insufficient oil absorption of gear pump high-speed operation leads to the cavitation to take place, can make the inside local high temperature that produces of hydraulic pump, and the sealing member harm, the leakage increases in the pump, and volumetric efficiency reduces, influences the reliability of pump. The gear pump with the rated rotation speed of 2200 turns, the volumetric efficiency of the gear pump is reduced from 98% to 40% in a short time when the highest rotation speed runs at 3000 turns, and the gear pump cannot be used normally.
The hydraulic motor used by the electric product of the existing engineering machinery is low in rotating speed, large in torque and high in cost.
Disclosure of utility model
The utility model aims to solve the technical problem that the existing gear pump cannot work at high rotation speed, and provides a gear pump oil absorption system and engineering machinery.
The technical scheme for achieving the purpose of the utility model is as follows: the gear pump oil suction system comprises a gear pump, a gear pump driving motor for driving the gear pump, a hydraulic oil tank and a booster pump, wherein the booster pump is fixedly arranged on the gear pump, and an input shaft of the booster pump is connected with an input shaft of the gear pump; an oil inlet of the booster pump is connected with the hydraulic oil tank through an oil inlet pipe, and an oil outlet of the booster pump is connected with an oil inlet of the gear pump through an oil outlet pipe.
According to the utility model, the pressure at the oil inlet of the gear pump can be increased by driving the booster pump, so that the gear pump can not generate cavitation when working at a high rotating speed, and the gear pump working at the high rotating speed can be adapted to a conventional high-speed motor, and the cost is reduced. In addition, as the gear pump can work at a high rotating speed, for the same flow requirement, the volume of the pump and the volume of the motor can be reduced by increasing the rotating speed of the pump, reducing the displacement and the torque, and thus the weight of the pump and the motor can be reduced.
In the gear pump oil suction system, the booster pump is an impeller type centrifugal pump.
In the gear pump oil suction system, the oil outlet pipe comprises a steel pipe and a hose, the oil inlet end of the steel pipe is connected with the oil outlet of the booster pump, the oil outlet end of the steel pipe is connected with the oil inlet end of the hose, and the oil outlet end of the hose is connected with the oil inlet of the gear pump. The oil outlet pipe is connected with the gear pump and the booster pump, and the connection length of the hose between the two pumps is reduced by using the steel pipe in the oil outlet pipe of the booster pump, so that the amplitude of pipeline shake during pump operation is reduced.
In the gear pump oil absorption system, the gear pump is a duplex pump with two mutually independent oil inlets, the oil outlet end of the steel pipe is provided with two hose joints, and each hose joint is communicated with the corresponding oil inlet of the gear pump through a hose.
In the gear pump oil suction system, an oil inlet pipe between an oil inlet of a booster pump and a hydraulic oil tank is a hose.
In the gear pump oil absorption system, an output shaft of the gear pump driving motor is in spline connection with an input shaft of the gear pump. The rotation speed of the gear pump is equal to that of the driving motor, and the gear pump works at a high rotation speed when the driving motor runs at a high speed. The driving motor is directly connected with the gear pump, so that the structure is simplified.
In the gear pump oil absorption system, an input shaft of the booster pump is in spline connection with an input shaft of the gear pump.
The technical scheme for achieving the purpose of the utility model is as follows: an engineering machine is constructed, which is provided with the gear pump oil suction system. The working machine is an electric working machine such as an electric excavator, an electric loader, or the like.
Compared with the prior art, in the utility model, the gear pump is connected with the oil tank through the booster pump oil way, and when the gear pump is directly driven to work at a high rotating speed by using the high-speed motor, the pressure of the oil inlet of the gear pump can be increased by the booster pump, so that air pockets are avoided in the gear pump, the low-speed high-torque motor is avoided, and the cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a gear pump oil absorption system of the present utility model.
Fig. 2 is a schematic structural view of the gear pump oil suction system of the present utility model.
Part names and serial numbers in the figure:
The hydraulic oil tank 1, the gear pump driving motor 2, the gear pump 3, the booster pump 4, the oil inlet pipe 5, the oil outlet pipe 6, the steel pipe 61 and the hose 62.
Detailed Description
The following describes specific embodiments with reference to the drawings.
Fig. 1 and 2 illustrate a gear pump oil suction system in accordance with an embodiment of the present utility model.
As shown in fig. 1 and 2, the gear pump oil suction system includes a gear pump 3, a gear pump driving motor 2 for driving the gear pump 3, a hydraulic oil tank 1, and a booster pump 4. The booster pump 4 is fixedly arranged on the gear pump 3, and an input shaft of the booster pump 4 is connected with an input shaft of the gear pump 3; the oil inlet of the booster pump 4 is connected with the hydraulic oil tank 1 through an oil inlet pipe 5, and the oil outlet of the booster pump 4 is connected with the oil inlet of the gear pump 3 through an oil outlet pipe 6.
The booster pump 4 is an impeller type centrifugal pump which can be operated in a high rotation speed state.
The oil outlet pipe 6 comprises a steel pipe 61 and a hose 62, and the oil inlet end of the steel pipe 61 is fixed on the booster pump 4 and is connected with the oil outlet of the booster pump 4. The oil outlet end of the steel pipe 61 is connected with the oil inlet end of the hose 62, and the oil outlet end of the hose 62 is connected with the oil inlet of the gear pump 3. The steel pipe 61 is used in the oil outlet pipe 6 of the booster pump 4 to reduce the connection length of the hose between the two pumps, thereby reducing the amplitude of the pipe jitter when the pumps are operated.
The gear pump 3 is a duplex pump with two mutually independent oil inlets, the oil outlet end of the steel pipe 61 is provided with two hose joints, and each hose joint is communicated with the corresponding oil inlet of the gear pump 3 through a hose 62.
The oil inlet pipe between the oil inlet of the booster pump 4 and the hydraulic oil tank 1 is a hose.
An output shaft of the gear pump driving motor 2 is in spline connection with an input shaft of the gear pump 3, and an input shaft of the booster pump 4 is in spline connection with an input shaft of the gear pump 3. The rotation speed of the gear pump 3 is equal to the rotation speed of the gear pump driving motor 2, and the gear pump 3 operates at a high rotation speed when the gear pump driving motor 2 is operated at a high speed. The gear pump driving motor 2 is directly connected with the gear pump 3, so that the structure is simplified.
The embodiment of the utility model also provides engineering machinery, which is provided with the gear pump oil absorption system in the first embodiment or the second embodiment. The construction machine may be an electric construction machine, such as an electric loader, an electric excavator, or the like.
In the embodiment of the utility model, the gear pump 3 and the booster pump 4 are directly driven by the gear pump driving motor 2, and the gear pump 3 can work at high rotation speed (the rotation speed is higher than 2500 rpm) under the driving action of the gear pump driving motor 2 because the oil inlet of the gear pump 3 has the boosting action of the booster pump 4. The gear pump driving motor 2 for driving the gear pump 3 can adopt a high-speed motor (the corresponding rated rotation speed is more than 2500R/M), and compared with a low-rotation-speed high-torque motor, the high-speed motor has relatively low price, and the cost can be reduced during machine manufacturing.
Claims (8)
1. The gear pump oil absorption system comprises a gear pump, a gear pump driving motor for driving the gear pump, and a hydraulic oil tank, and is characterized by further comprising a booster pump, wherein the booster pump is fixedly arranged on the gear pump, and an input shaft of the booster pump is connected with an input shaft of the gear pump; an oil inlet of the booster pump is connected with the hydraulic oil tank through an oil inlet pipe, and an oil outlet of the booster pump is connected with an oil inlet of the gear pump through an oil outlet pipe.
2. The gear pump oil absorption system according to claim 1, wherein the booster pump is an impeller type centrifugal pump.
3. The gear pump oil absorption system according to claim 2, wherein the oil outlet pipe comprises a steel pipe and a hose, an oil inlet end of the steel pipe is connected with an oil outlet of the booster pump, an oil outlet end of the steel pipe is connected with an oil inlet end of the hose, and an oil outlet end of the hose is connected with an oil inlet of the gear pump.
4. A gear pump oil absorption system according to claim 3 wherein the gear pump is a duplex pump having two mutually independent oil inlets, the oil outlet end of the steel tube having two hose connectors, each hose connector being in communication with a respective oil inlet of the gear pump via a hose.
5. The gear pump oil absorption system according to claim 1, wherein the oil inlet pipe is a hose.
6. The gear pump oil absorption system according to any one of claims 1 to 5, wherein an output shaft of the gear pump drive motor is spline-connected with an input shaft of the gear pump.
7. The gear pump oil absorption system according to any one of claims 1 to 5, wherein an input shaft of the booster pump is spline-connected with an input shaft of the gear pump.
8. A construction machine characterized by having the gear pump oil absorption system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322565666.9U CN220909985U (en) | 2023-09-21 | 2023-09-21 | Gear pump oil suction system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322565666.9U CN220909985U (en) | 2023-09-21 | 2023-09-21 | Gear pump oil suction system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220909985U true CN220909985U (en) | 2024-05-07 |
Family
ID=90905647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322565666.9U Active CN220909985U (en) | 2023-09-21 | 2023-09-21 | Gear pump oil suction system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220909985U (en) |
-
2023
- 2023-09-21 CN CN202322565666.9U patent/CN220909985U/en active Active
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