CN219242328U - Hydraulic system for mechanical engineering - Google Patents

Abstract

The application discloses a hydraulic system of mechanical engineering, including the pump body of hydraulic system oil feed, the drive unit of drive pump body work, control the electronic control valve of pump body flow and the pressure sensor who is connected with the electronic control valve, pressure sensor detects hydraulic system's pressure data and transmits to the electronic control valve, the electronic control valve is according to the change of hydraulic system pressure control pump body flow's size, so that the electronic control valve can realize controlling hydraulic system under the global operating mode required pressure and flow, and then provide accurate flow and pressure for the system, avoid pressure and unnecessary waste of flow, avoid the condition that the system appears pressure leakage simultaneously, promoted the efficiency of drive system work; meanwhile, when the vehicle is idling, namely pressure is not needed, the electronic control valve is completely closed, the driving system does not need to work, the energy loss caused by idling of the motor when the vehicle is idling is reduced, and the working efficiency of the driving system is further improved.

Description

Hydraulic system for mechanical engineering

Technical Field

The application belongs to the technical field of mechanical engineering, and particularly relates to a hydraulic system of mechanical engineering.

Background

The driving system is a system for providing power for a hydraulic transmission system of engineering machinery, the existing driving system generally comprises an engine and a variable pump, the flow of the variable pump is regulated through the engine, and in the use process, the regulation of different pressures is realized through the change of the flow of the variable pump according to different mechanical loads. But in the prior art, the flow of the whole system is controlled by adjusting the flow of the variable pump through the load demand of the system, when the load of the system, namely the pressure of the system is higher, the flow of the variable pump is reduced, when the pressure of the system is smaller, the flow of the variable pump is increased, the variable pump can only control the change of the flow according to the change of the pressure of the system, so that the flow can be changed along with the change of the pressure when the pressure is changed, and therefore, the risk of pressure leakage is caused when the flow is smaller and the pressure is larger, further, the power loss is caused, and the working efficiency of an engine is seriously influenced.

Disclosure of Invention

The application provides a hydraulic system of mechanical engineering to solve above-mentioned actuating system and have the risk of pressure leakage when the flow of the great variable pump of power of motor is less, lead to power loss, influence engine work efficiency technical problem.

The technical scheme adopted by the application is as follows: the utility model provides a hydraulic system of mechanical engineering, includes hydraulic system oil feeding's pump body, drive the drive unit of pump body work, control the electronic control valve of pump body flow and with the pressure sensor that the electronic control valve is connected, pressure sensor detects hydraulic system's pressure data and transmit for the electronic control valve, the electronic control valve is according to hydraulic system pressure's change control the magnitude of pump body flow.

The drive system in the present application also has the following additional technical features:

the driving unit comprises a motor, a speed reducing device and a shell arranged on the outer side of the motor.

The inside of casing is provided with the slot hole that sets up along the axial of motor, be provided with on the casing with the water injection well choke of slot hole intercommunication to make the cooling water can flow on the casing.

The pump body is a constant delivery pump.

The hydraulic system further comprises a connecting device for connecting the pump body with the driving unit in a transmission manner.

The connecting device comprises a connecting piece and a transmission piece, wherein one end of the transmission piece is inserted into the pump body, and the other end of the transmission piece is connected with the connecting piece so as to transmit the kinetic energy of the driving unit to the pump body.

The connecting piece comprises a first transmission part and a second transmission part, wherein the first transmission part is provided with a first connecting hole for the output shaft of the driving unit to pass through, the output shaft of the driving unit is inserted into the first connecting hole, the second transmission part is provided with a second connecting hole for the transmission part to pass through, and the transmission part is inserted into the second connecting hole so as to connect the driving unit with the transmission part.

A first limiting protrusion is axially arranged on one of the inner wall of the first connecting hole and the outer wall of the output shaft of the driving unit, and a first limiting groove matched with the first limiting protrusion is formed in the other one of the inner wall of the first connecting hole and the outer wall of the output shaft of the driving unit; one of the inner wall of the second connecting hole and the outer wall of the transmission piece is provided with a second limiting protrusion, and the other one of the inner wall of the second connecting hole and the outer wall of the transmission piece is correspondingly provided with a second limiting groove matched with the second limiting protrusion.

The first limiting protrusion, the second limiting protrusion, the first limiting groove and the second limiting groove are all provided with a plurality of groups along the axial direction.

The pump body and the driving unit are coaxially arranged.

Due to the adoption of the technical scheme, the beneficial effects obtained by the application are as follows:

1. according to the hydraulic system, the electronic control valve for controlling the pump body is arranged in the hydraulic system of the mechanical engineering, so that the electronic control valve can control the flow of the pump body according to the load change of the hydraulic system, compared with the prior art that the pump body is controlled by the load of the system through a variable pump, the electronic control valve is used for controlling the flow of the pump body, so that the electronic control valve can control the pressure and the flow required by the hydraulic system under the global working condition, and further provides accurate flow and pressure for the hydraulic system, unnecessary waste of the pressure and the flow is avoided, meanwhile, the condition that the system is leaked due to the pressure is avoided, and the working efficiency of the driving system is improved; meanwhile, when the vehicle is idling, namely pressure is not needed, the electronic control valve is completely closed, the driving system does not need to work, the energy loss caused by idling of the motor when the vehicle is idling is reduced, and the working efficiency of the driving system is further improved.

2. This application is through will decelerator with the motor sets up to same casing, and then has reduced the motor with the space that decelerator occupy, so that actuating system can be compacter, has reduced the space that actuating system occupy, and then makes actuating system can be more convenient when the installation, and can also install other spare part with unnecessary space, has reduced actuating system occupies the space, and then has promoted the space utilization of vehicle.

3. This application is through will the inside of casing is provided with the edge the slot hole of the axial setting of motor, and be provided with on the casing with the water injection nozzle of slot hole intercommunication, through the water injection nozzle to pour into cooling water in the slot hole into in order to cool off the motor, simultaneously, because the motor with decelerator is same casing, when cooling water cools off the motor, also cooled off decelerator, need not to cool off decelerator once more, has improved refrigerated efficiency.

4. Because the driving system relies on the control electronic control valve to control flow, consequently, will the pump body sets up as the constant displacement pump, compares in the variable displacement pump, and the constant displacement pump can provide stable flow, can not change along with the change of load, avoids because the electronic control valve control flow after the flow also can take place the change along with and lead to the unable condition of control of flow of output, and then guaranteed driving system's flow, and then improved driving system's energy utilization.

5. This application is through will detection unit with be provided with connecting device between the drive unit in order will detection unit with drive unit connects, has avoided detection unit with direct contact between the drive unit, on the one hand avoid the drive unit with friction between the detection unit leads to the drive unit with the condition that damage appears in the detection unit, on the other hand can also increase detection unit with distance between the drive unit, and then make the radiating effect of motor is better, avoids the heat transfer of motor to the condition of detection unit has promoted the reliability of actuating system work.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic structural diagram of a driving system according to an embodiment of the present application.

1-pump body, 2-driving unit, 21-motor, 22-speed reducer, 23-shell, 231-slot hole, 232-water nozzle; 3-an electronic control valve; 4-connecting device, 41-connecting piece, 42-driving piece.

Detailed Description

In order to more clearly illustrate the general concepts of the present application, a detailed description is provided below by way of example in connection with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and thus the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it should be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1, the application provides a hydraulic system for mechanical engineering, which comprises a pump body 1 for supplying oil to the hydraulic system, a driving unit 2 for driving the pump body 1 to work, an electronic control valve 3 for controlling the flow of the pump body 1, and a pressure sensor connected with the electronic control valve 3, wherein the pressure sensor detects pressure data of the hydraulic system and transmits the pressure data to the electronic control valve 3, and the electronic control valve 3 controls the flow of the pump body 1 according to the pressure change of the hydraulic system.

By arranging the electronic control valve 3 for controlling the pump body 1 in the driving system, so that the electronic control valve 3 can control the flow of the pump body 1 according to the change of the load of the driving system, compared with the prior art that the pump body 1 is controlled by the load of the variable pump through the system, the electronic control valve 3 is used for controlling the flow of the pump body 1, so that the control valve can control the valve opening according to the pressure of the hydraulic circuit detected by the pressure sensor, and when the pressure in the hydraulic system is smaller, the control device controls the valve opening to be reduced, so that the flow of the hydraulic system is reduced; when the pressure in the hydraulic system is larger, the control device controls the opening of the valve to be increased, so that the flow of the system is increased, the flow of the hydraulic circuit and the control of the pressure are realized, the pressure and the flow of the system are provided for the system by the pressure and the flow which are needed by the system, the waste is avoided, the energy utilization rate of the driving system is improved, the electronic control valve 3 can realize the control of the pressure and the flow which are needed by the hydraulic system under the global working condition, the accurate flow and the accurate pressure are provided for the system, the unnecessary waste of the pressure and the flow is avoided, the pressure leakage of the system is avoided, and the working efficiency of the driving system is improved; meanwhile, when the vehicle is idling, namely pressure is not needed, the electronic control valve 3 is completely closed, the driving system does not need to work, the energy loss caused by idling of the motor 2121 when the vehicle is idling is reduced, and the working efficiency of the driving system is further improved.

As a preferred embodiment of the present application, as shown in fig. 1, the driving unit 2 includes a motor 2121, a reduction gear 22, and a housing 23 provided outside the motor 2121.

Through with decelerator 22 with motor 2121 sets up to same casing 23, and then reduced motor 2121 with the space that decelerator 22 occupy, so that actuating system can be compacter, has reduced the space that actuating system occupy, and then makes actuating system can be more convenient when the installation, and can also install other spare part with unnecessary space, has reduced actuating system occupies the space, and then has promoted the space utilization of vehicle.

Further, as shown in fig. 1, a long hole 231 provided in the axial direction of the motor 2121 is provided in the housing 23, and a water nozzle 232 communicating with the long hole 231 is provided in the housing 23 so that cooling water can flow on the housing 23.

By providing the housing 23 with the elongated hole 231 provided along the axial direction of the motor 2121 and providing the housing 23 with the water nozzle 232 communicating with the elongated hole 231, cooling water is injected into the elongated hole 231 through the water nozzle 232 to cool the motor 2121, and at the same time, since the motor 2121 and the reduction gear 22 are the same housing 23, the reduction gear 22 is cooled while the motor 2121 is cooled by the cooling water, without cooling the reduction gear 22 again, and the cooling efficiency is improved.

The pump body 1 is not particularly limited in this application, and may be a fixed displacement pump or a variable displacement pump, and as a preferred embodiment of this application, the pump body 1 is a fixed displacement pump.

Because the driving system controls the flow by the control electronic control valve 3 in the application, the pump body 1 is set as a constant displacement pump, and compared with a variable displacement pump, the constant displacement pump can provide stable flow and cannot change along with the change of a load, the situation that the output flow cannot be controlled due to the fact that the flow of the pump body 1 is changed along with the change of the flow after the electronic control valve 3 controls the flow is avoided, the flow of the driving system is further guaranteed, and the energy utilization rate of the driving system is further improved.

Preferably, the pump body 1 is a ring gear high pressure pump.

Through will pump body 1 sets up as the high-pressure pump of internal gear, compare in traditional pump body 1, the efficiency of internal gear high-pressure pump is higher, the pressure release is less and the noise is lower, and then has promoted actuating system's work efficiency.

As a preferred embodiment of the present application, as shown in fig. 1, the hydraulic system further comprises a connection device 4 for drivingly connecting the pump body 1 and the drive unit 2.

By arranging the connecting device 4 between the detecting unit and the driving unit 2 to connect the detecting unit and the driving unit 2, the direct contact between the detecting unit and the driving unit 2 is avoided, on one hand, the situation that the friction between the driving unit 2 and the detecting unit causes damage to the driving unit 2 and the detecting unit is avoided, on the other hand, the distance between the detecting unit and the driving unit 2 can be increased, the heat dissipation effect of the motor 2121 is better, the situation that the heat of the motor 2121 is transferred to the detecting unit is avoided, and the working reliability of the driving system is improved.

It should be noted that, the structure of the connection device 4 is not specifically limited, and as a preferred embodiment of the present application, as shown in fig. 1, the connection device 4 includes a connection member 4 and a transmission member 42, and one end of the transmission member 42 is inserted into the pump body 1, and the other end is connected with the connection member 4, so as to transmit the kinetic energy of the driving unit 2 to the pump body 1.

By arranging the connecting device 4 to comprise the connecting piece 4 and the transmission piece 42, and inserting one end of the transmission piece 42 into the pump body 1, so that the effect of transmitting kinetic energy to the pump body 1 by the motor 2121 is better, the effect of energy transmission between the driving unit 2 and the detection unit is improved, the situation that the energy loss is not caused by the effect of transmitting kinetic energy to the pump body 1 by the motor 2121 is avoided, and the working efficiency of the motor 2121 is improved.

Further, the connecting member 4 includes a first transmission portion and a second transmission portion, the first transmission portion is provided with a first connection hole through which the output shaft of the driving unit 2 passes, the output shaft of the driving unit 2 is inserted into the first connection hole, the second transmission portion is provided with a second connection hole through which the transmission member 42 passes, and the transmission member 42 is inserted into the second connection hole so as to connect the driving unit 2 with the transmission member 42.

By inserting the output shaft of the motor 2121 into the first connecting hole, the transmission member 42 is inserted into the second connecting hole to connect the motor 2121 with the transmission member 42, and during assembly, only the output shaft of the motor 2121 is inserted into the first connecting hole and the transmission member 42 is inserted into the second connecting hole, so that assembly can be performed, connection modes of the motor 2121 and the transmission member 42 with the connection member 4 are simplified, assembly steps are simplified, and assembly efficiency is improved.

Further, one of the inner wall of the first connecting hole and the outer wall of the output shaft of the driving unit 2 is provided with a first limit protrusion along the axial direction, and the other one of the inner wall of the first connecting hole and the outer wall of the output shaft of the driving unit 2 is provided with a first limit groove matched with the first limit protrusion; the inner wall of the second connecting hole and the outer wall of the transmission piece 42 are provided with second limiting protrusions, and the other one of the two is correspondingly provided with second limiting grooves matched with the second limiting protrusions.

Through will the inner wall of first connecting hole is provided with first spacing arch, the output shaft of motor 2121 is provided with first spacing recess, works as when motor 2121 starts, the transmission shaft of motor 2121 takes place to rotate under the drive of motor 2121, through first spacing arch with the spacing cooperation of first spacing recess, so that the output shaft drives the pivoted effect of connecting piece 4 is better, avoids the transmission shaft of motor 2121 with the not good condition of transmission effect that the slip leads to appears in connecting piece 4 has promoted the transmission efficiency of motor 2121, and then has promoted the work efficiency of motor 2121.

It should be noted that, the number of the first limiting protrusion, the second limiting protrusion, the first limiting groove and the second limiting groove is not limited in detail, and may be one or more, preferably, the first limiting protrusion, the second limiting protrusion, the first limiting groove and the second limiting groove are all provided with multiple groups along the axial direction.

Through will first spacing arch the spacing arch of second the spacing recess of first with the spacing recess of second is provided with the multiunit along the axial, has further promoted connecting piece 4 with driving medium 4232 reaches the spacing effect of output shaft, so that connecting piece 4 with driving medium 42 reaches spacing of output shaft is more stable, and then has further promoted motor 2121 to the transmission efficiency of pump body 1 transmission kinetic energy, and then has further promoted motor 2121's work efficiency.

As a preferred embodiment of the present application, as shown in fig. 1, the pump body 1 and the driving unit 2 are coaxially disposed.

Through with pump body 1 with drive unit 2 coaxial setting, with the convenience will drive unit 2 with pump body 1 carries out the transmission and is connected, on the one hand avoids drive unit 2 with there is the angle between the pump body 1 to lead to when drive unit 2 drive the pump body 1 rotates the eccentric rotation appears and then wearing and tearing and noise's the condition appears, on the other hand can also make drive arrangement will as much as possible kinetic energy transmission gives pump body 1 promotes drive arrangement's transmission efficiency.

The non-mentioned places in the application can be realized by adopting or referring to the prior art.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (10)

1. The hydraulic system for the mechanical engineering is characterized by comprising a pump body for supplying oil to the hydraulic system, a driving unit for driving the pump body to work, an electronic control valve for controlling the flow of the pump body and a pressure sensor connected with the electronic control valve, wherein the pressure sensor detects pressure data of the hydraulic system and transmits the pressure data to the electronic control valve, and the electronic control valve controls the flow of the pump body according to the pressure change of the hydraulic system.

2. The hydraulic system of claim 1, wherein the drive unit comprises a motor, a reduction gear, and a housing disposed outside the motor.

3. A hydraulic system of a mechanical engineering according to claim 2, characterized in that the housing is provided with a long hole provided in the axial direction of the motor, and the housing is provided with a water nozzle communicating with the long hole so that cooling water can flow on the housing.

4. The hydraulic system of claim 1, wherein the pump body is a fixed displacement pump.

5. A hydraulic system for mechanical engineering according to claim 1, further comprising a connection means for drivingly connecting the pump body to the drive unit.

6. A hydraulic system for mechanical engineering according to claim 5, wherein the connecting means comprises a connecting member and a transmission member, one end of the transmission member being inserted into the pump body, and the other end being connected to the connecting member so as to transmit the kinetic energy of the driving unit to the pump body.

7. The hydraulic system of claim 6, wherein the connecting member includes a first transmission portion and a second transmission portion, the first transmission portion is provided with a first connection hole through which an output shaft of the driving unit passes, the output shaft of the driving unit is inserted into the first connection hole, the second transmission portion is provided with a second connection hole through which the transmission member passes, and the transmission member is inserted into the second connection hole to connect the driving unit with the transmission member.

8. The hydraulic system of claim 7, wherein one of an inner wall of the first connecting hole and an outer wall of the output shaft of the driving unit is provided with a first limit protrusion along an axial direction, and the other one of the inner wall of the first connecting hole and the outer wall of the output shaft of the driving unit is provided with a first limit groove matched with the first limit protrusion; one of the inner wall of the second connecting hole and the outer wall of the transmission piece is provided with a second limiting protrusion, and the other one of the inner wall of the second connecting hole and the outer wall of the transmission piece is correspondingly provided with a second limiting groove matched with the second limiting protrusion.

9. The hydraulic system of claim 8, wherein the first limit projection, the second limit projection, the first limit groove, and the second limit groove are each provided with a plurality of groups along an axial direction.

10. The hydraulic system of claim 1, wherein the pump body and the drive unit are coaxially disposed.

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