CN108533540B - Swash plate rotatable type double-cylinder hydraulic transformer - Google Patents

Swash plate rotatable type double-cylinder hydraulic transformer Download PDF

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Publication number
CN108533540B
CN108533540B CN201810377616.9A CN201810377616A CN108533540B CN 108533540 B CN108533540 B CN 108533540B CN 201810377616 A CN201810377616 A CN 201810377616A CN 108533540 B CN108533540 B CN 108533540B
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China
Prior art keywords
cylinder
flow distribution
swash plate
port
oil
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CN201810377616.9A
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CN108533540A (en
Inventor
沈伟
王介豪
赵瑞涵
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit

Abstract

The present invention provides a swash plate rotatable type double cylinder hydraulic transformer for adjusting a transformation ratio, having the characteristics comprising: the cylinder body part comprises two cylinder bodies and plungers arranged in plunger holes on the two cylinder bodies; the two flow distribution parts respectively comprise an internal oil port for inputting hydraulic oil, a flow distribution port which is connected with the internal oil port and used for transmitting the input hydraulic oil to the cylinder body, a flow distribution disc which is connected with the flow distribution port and used for distributing the hydraulic oil flowing from the flow distribution port to the cylinder body, and an internal oil path which is used for connecting the two internal oil ports; the shell part comprises a pump shell covering the cylinder body, a flow distribution shell connected with the pump shell and used for covering the flow distribution part, and a flow distribution shell end cover connected with the pump shell and the flow distribution shell and used for packaging the hydraulic transformer; and the cylinder body connecting part comprises a main shaft connected with the cylinder body through a spline, a swash plate connected with the main shaft through a bearing, and a rotor which is connected with the main shaft through the swash plate and is provided with horizontal shafts at two ends and used for controlling the swash plate to rotate.

Description

Swash plate rotatable type double-cylinder hydraulic transformer
Technical Field
The invention relates to a hydraulic transformer, in particular to a swash plate rotatable double-cylinder hydraulic transformer.
Background
The secondary regulation technology based on the constant pressure network is a novel hydraulic transmission technology developed in recent years. In the secondary regulation system, the secondary element can obtain energy from the constant voltage network without loss, and can be connected with a plurality of mutually unrelated loads to realize the recovery and reutilization of the system braking energy and the gravitational potential energy. The secondary regulation of the rotary load by driving the constant-pressure network can be realized by a variable motor and a servo regulation mechanism. For driving linear loads, it is conventional practice to use a throttle valve, which results in a large energy loss. Therefore, the constant voltage network secondary regulation urgently needs a hydraulic component for driving a linear load without throttling loss, and a hydraulic transformer is developed under the requirement.
At present, the change of the transformation ratio is mainly realized by rotating a port plate by a novel hydraulic transformer, but the problem that the hydraulic transformer with large displacement is needed for meeting the dynamic characteristic of an actuating element and adapting to load pressure along with the increase of the rotation angle of the port plate exists. However, the oversized element is difficult to install under practical conditions and increases the flow and pressure pulsations. In addition, because the relative position between the port plate and the port and the cylinder body is not fixed, the oil leakage is serious, and the efficiency of the hydraulic transformer is reduced, a hydraulic transformer capable of solving the problems is required to be designed.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a swash plate rotatable type double-cylinder hydraulic transformer.
The present invention provides a swash plate rotatable type double cylinder hydraulic transformer for adjusting a transformation ratio, having the characteristics comprising: the cylinder body part comprises two cylinder bodies and plungers arranged in plunger holes on the two cylinder bodies; the two flow distribution parts respectively comprise an internal oil port for inputting hydraulic oil, a flow distribution port which is connected with the internal oil port and used for transmitting the input hydraulic oil to the cylinder body, a flow distribution disc which is connected with the flow distribution port and used for distributing the hydraulic oil flowing from the flow distribution port to the cylinder body, and an internal oil path which is used for connecting the two internal oil ports; the shell part comprises a pump shell covering the cylinder body, a flow distribution shell connected with the pump shell and used for covering the flow distribution part, and a flow distribution shell end cover connected with the pump shell and the flow distribution shell and used for packaging the hydraulic transformer; and a cylinder body connecting part, including a main shaft connected with the cylinder body through a spline, a swash plate connected with the main shaft through a bearing, a rotor connected with the main shaft through the swash plate and provided with horizontal shafts at two ends for controlling the rotation of the swash plate, wherein an internal oil passage connects the internal oil ports of the two cylinder bodies for supplying oil to the two cylinder bodies simultaneously, the swash plate is provided with an inclined plane end provided with a bearing seat and a vertical plane end provided with a horizontal through hole, the end of the main shaft is plugged into the bearing seat after being matched with the bearing, and the horizontal shaft of the rotor is connected with the horizontal through hole of the swash plate through a flat key.
In the swash plate rotatable type double-cylinder hydraulic transformer provided by the invention, the swash plate rotatable type double-cylinder hydraulic transformer can further have the following characteristics: wherein, one end of the internal oil port is provided with an oil hole which is connected with the flow distribution port in a matching way.
In the swash plate rotatable type double-cylinder hydraulic transformer provided by the invention, the swash plate rotatable type double-cylinder hydraulic transformer can further have the following characteristics: wherein, the quantity of oilhole is three in every distribution portion, and the quantity of distribution mouth is three.
In the swash plate rotatable type double-cylinder hydraulic transformer provided by the invention, the swash plate rotatable type double-cylinder hydraulic transformer can further have the following characteristics: the stator is arranged outside the rotor, and a gap between the rotor and the stator is used for inputting hydraulic oil so as to drive the rotor to rotate.
In the swash plate rotatable type double-cylinder hydraulic transformer provided by the invention, the swash plate rotatable type double-cylinder hydraulic transformer can further have the following characteristics: wherein the internal oil passage is provided in the pump case.
In the swash plate rotatable type double-cylinder hydraulic transformer provided by the invention, the swash plate rotatable type double-cylinder hydraulic transformer can further have the following characteristics: wherein, it has first keyway to open in the horizontal through-hole, and it has the second keyway to open on the horizontal axis, and first keyway and second keyway are mutually supported for flat key's insertion to be connected swash plate and rotor.
Action and Effect of the invention
According to the swash plate rotatable type double-cylinder hydraulic transformer, the relative position of the adopted flow distribution plate and the flow distribution port is fixed, so that the problem of oil leakage is effectively solved. Because the double-cylinder structure is adopted, the plunger piston in the port window on the port plate is doubled, and the displacement of the hydraulic transformer is increased. Because the adopted rotor can drive the swash plates at two ends to rotate, the dynamic response is improved, the control quality is improved, and the control difficulty is reduced. Because the adopted swash plate has no angle limitation when rotating, large-angle rotation is realized, the adjusting range of the transformation ratio is enlarged, the displacement is larger, and a system where the transformer is positioned can adapt to a larger range of load pressure. Because the pump shell is internally provided with the internal oil circuit which connects the internal oil ports of the two flow distribution parts, when the hydraulic pump works, hydraulic oil can be simultaneously supplied to the two cylinder bodies only by inputting hydraulic oil into the internal oil port at one end, and the problem of overlarge element volume caused by the increase of the discharge capacity of the hydraulic transformer can be solved. Therefore, the swash plate rotatable double-cylinder hydraulic transformer has the advantages of large displacement, large transformation ratio adjusting range, large load pressure which can be adapted by the transformer, less oil leakage and high working efficiency.
Drawings
Fig. 1 is a structural sectional view of a hydraulic transformer in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of a hydraulic transformer in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a port plate in an embodiment of the invention;
FIG. 4 is a partial cross-sectional view of the rotor and swashplate connection in an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of a rotor in the embodiment of the present invention;
FIG. 6 is a schematic view showing the structure of a swash plate in the embodiment of the present invention.
Detailed Description
In order to make the technical means and functions of the present invention easy to understand, the present invention is specifically described below with reference to the embodiments and the accompanying drawings.
Example (b):
fig. 1 is a structural sectional view of a hydraulic transformer in an embodiment of the present invention, and fig. 2 is a sectional view taken along a-a in the hydraulic transformer in the embodiment of the present invention.
As shown in fig. 1 and 2, a swash plate rotatable type double-cylinder hydraulic transformer 100 according to an embodiment of the present invention includes a cylinder portion, two flow distribution portions, a housing portion, and a cylinder connecting portion.
The cylinder part comprises two cylinder bodies 1 and plungers 2 arranged in plunger holes on the two cylinder bodies 1, and the plungers 2 are connected with the inclined plane end of the swash plate 4 through plunger seats 3 through sliding shoes.
And the two flow distribution parts each comprise an internal oil port 5 for inputting hydraulic oil, a flow distribution port 6 connected with the internal oil port 5 and used for transmitting the input hydraulic oil to the cylinder body 1, a flow distribution plate 7 connected with the flow distribution port 6 and used for distributing the hydraulic oil flowing from the flow distribution port 6 to the cylinder body 1, and an internal oil path 8 used for connecting the two internal oil ports 5.
Fig. 3 is a schematic structural diagram of a port plate in an embodiment of the invention.
As shown in FIG. 3, the valve plate 7 is provided with A, B, T three valve windows which are correspondingly connected with A, B, T three ports of the valve 6, the relative position of the valve plate 7 and the valve 6 is unchanged, and the swash plate 4 rotates to change the relative position of the valve plate 7 and the swash plate 4, so that the number of corresponding plungers 2 in A, B, T three valve windows on the valve plate 7 is changed, the displacement of A, B, T three valve windows 6 is changed, and the pressure change ratio is adjusted.
One end of the internal oil port 5 is provided with three oil holes which are matched and connected with the A, B, T ports of the flow distribution port 6, and the other end is not provided with a hole.
The number of the oil holes in each flow distribution part is three, and the number of the flow distribution ports 6 is three.
The internal oil path 8 connects the internal oil ports 5 of the two cylinder bodies 1 for supplying oil to the two cylinder bodies 1 simultaneously, and the internal oil path 8 is opened in the pump case 9.
And the shell part comprises a pump shell 9 covering the cylinder body 1, a flow distribution shell 10 connected with the pump shell 9 and used for covering the flow distribution part, and a flow distribution shell end cover 11 connected with the pump shell 9 and the flow distribution shell 10 and used for packaging the hydraulic transformer.
FIG. 4 is a partial sectional view of a rotor and a swash plate at the junction in an embodiment of the invention.
As shown in fig. 4, the cylinder connecting portion includes a main shaft 12 connected to the cylinder 1 through a spline, a swash plate 4 connected to the main shaft 12 through a bearing 13, and a rotor 14 connected to the main shaft 12 through the swash plate 4 and having horizontal shafts at both ends thereof for controlling rotation of the swash plate 4.
Fig. 5 is a schematic structural view of a rotor in an embodiment of the present invention.
As shown in fig. 5, a horizontal shaft of the rotor 14 is connected with a horizontal through hole of the swash plate 4 through a flat key 16, a stator 15 is provided outside the rotor 14, and a gap between the rotor 14 and the stator 15 is used for inputting hydraulic oil, thereby driving the rotor 14 to rotate.
FIG. 6 is a schematic view showing the structure of a swash plate in the embodiment of the present invention.
As shown in fig. 6, the swash plate 4 has a slant end provided with a bearing seat and a vertical end provided with a horizontal through hole, and the end of the main shaft 12 is fitted into the bearing seat through a bearing 13.
A first key groove is formed in the horizontal through hole, a second key groove is formed in the horizontal shaft, and the first key groove and the second key groove are matched with each other and used for inserting the flat key 16, so that the swash plate 4 is connected with the rotor 14.
The working process of the swash plate rotatable type double-cylinder hydraulic transformer of the embodiment is as follows:
the swash plate rotatable double-cylinder hydraulic transformer 100 of this embodiment supports two cylinder blocks 1 through main shafts 12 on both sides, be fixed in between flow distribution port 6 and the swash plate 4, the hydraulic oil that is input by inside hydraulic fluid port 5 is transmitted to flow distribution port 6 and is transmitted to two cylinder blocks 1 after flow distribution of flow distribution plate 7, the gap input hydraulic oil between rotor 14 and stator 15, drive rotor 14 and drive swash plate 4 and rotate, make the relative position of flow distribution plate 7 and swash plate 4 change, the quantity of plunger 3 through three flow distribution window A, B, T on flow distribution plate 7 changes, with this displacement that changes three flow distribution port 6, thereby realize the change of three flow distribution port 6 transformation ratio with this realization regulation transformation ratio.
Effects and effects of the embodiments
According to the swash plate rotatable type double-cylinder hydraulic transformer of the embodiment, because the relative position of the adopted port plate and the port is fixed, the problem of oil leakage is effectively solved. Because the double-cylinder structure is adopted, the plunger piston in the port window on the port plate is doubled, and the displacement of the hydraulic transformer is increased. Because the adopted rotor can drive the swash plates at two ends to rotate, the dynamic response is improved, the control quality is improved, and the control difficulty is reduced. Because the adopted swash plate has no angle limitation when rotating, large-angle rotation is realized, the adjusting range of the transformation ratio is enlarged, the displacement is larger, and a system where the transformer is positioned can adapt to a larger range of load pressure. Because the pump shell is internally provided with the internal oil circuit which connects the internal oil ports of the two flow distribution parts, when the hydraulic pump works, hydraulic oil can be simultaneously supplied to the two cylinder bodies only by inputting hydraulic oil into the internal oil port at one end, and the problem of overlarge element volume caused by the increase of the discharge capacity of the hydraulic transformer can be solved. Therefore, the swash plate rotatable double-cylinder hydraulic transformer of the embodiment has the advantages of large displacement, large transformation ratio adjusting range, large load pressure which can be adapted by the transformer, less oil leakage and high working efficiency.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.

Claims (5)

1. A swash plate rotatable type double cylinder hydraulic transformer for adjusting a transformation ratio, comprising:
the cylinder body part comprises two cylinder bodies and plungers arranged in plunger holes on the two cylinder bodies;
the two flow distribution parts respectively comprise an internal oil port for inputting hydraulic oil, a flow distribution port which is connected with the internal oil port and used for transmitting the input hydraulic oil to the cylinder body, a flow distribution disc which is connected with the flow distribution port and used for distributing the hydraulic oil flowing from the flow distribution port to the cylinder body, and an internal oil path which is used for connecting the two internal oil ports;
the shell part comprises a pump shell covering the cylinder body, a flow distribution shell connected with the pump shell and used for covering the flow distribution part, and a flow distribution shell end cover connected with the pump shell and the flow distribution shell and used for packaging the hydraulic transformer; and
a cylinder body connecting part which comprises a main shaft connected with the cylinder body through a spline, a swash plate connected with the main shaft through a bearing, and a rotor which is connected with the main shaft through the swash plate and is provided with horizontal shafts at two ends and used for controlling the swash plate to rotate,
wherein the internal oil circuit connects the internal oil ports of the two cylinder bodies and is used for supplying oil to the two cylinder bodies simultaneously,
the swash plate is provided with an inclined plane end provided with a bearing seat and a vertical plane end provided with a horizontal through hole, the tail end of the main shaft is matched with the bearing and then plugged into the bearing seat, the horizontal shaft of the rotor is connected with the horizontal through hole of the swash plate through a flat key,
the stator is arranged outside the rotor, and a gap between the rotor and the stator is used for inputting the hydraulic oil, so that the rotor is driven to rotate to drive the swash plate to rotate, and the relative position of the port plate and the swash plate is changed.
2. The swash plate rotatable type double-cylinder hydraulic transformer according to claim 1, wherein:
and one end of the internal oil port is provided with an oil hole which is connected with the flow distribution port in a matching way.
3. The swash plate rotatable type double-cylinder hydraulic transformer according to claim 2, wherein:
wherein the number of the oil holes in each flow distribution portion is three,
the number of the flow distribution ports is three.
4. The swash plate rotatable type double-cylinder hydraulic transformer according to claim 1, wherein:
wherein the internal oil passage is provided in the pump case.
5. The swash plate rotatable type double-cylinder hydraulic transformer according to claim 1, wherein:
the horizontal through hole is internally provided with a first key groove, the horizontal shaft is provided with a second key groove, and the first key groove and the second key groove are matched with each other and used for inserting the flat key, so that the swash plate is connected with the rotor.
CN201810377616.9A 2018-04-25 2018-04-25 Swash plate rotatable type double-cylinder hydraulic transformer Active CN108533540B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810377616.9A CN108533540B (en) 2018-04-25 2018-04-25 Swash plate rotatable type double-cylinder hydraulic transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810377616.9A CN108533540B (en) 2018-04-25 2018-04-25 Swash plate rotatable type double-cylinder hydraulic transformer

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Publication Number Publication Date
CN108533540A CN108533540A (en) 2018-09-14
CN108533540B true CN108533540B (en) 2020-09-01

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627451A (en) * 1970-04-01 1971-12-14 Abex Corp Hydraulic transformer
CN102562690B (en) * 2012-02-07 2014-10-15 北京理工大学 Low flow pulsation hydraulic pressure transformer
CN105351259B (en) * 2015-12-02 2017-06-06 哈尔滨工业大学 A kind of swash plate plunger type hydraulic transformer of twin-rotor housing to top flow end face
CN105650041B (en) * 2016-01-28 2018-08-24 吉林大学 Bivariate symmetrical expression hydraulic transformer
CN105864124B (en) * 2016-05-04 2017-08-15 太原科技大学 A kind of hydraulic transformer with twin-rotor housing
CN106286433B (en) * 2016-11-03 2017-10-24 太原科技大学 It is a kind of that there is the hydraulic transformer for swinging swash plate and rotating valve plate
CN107461370A (en) * 2017-07-24 2017-12-12 徐州工程学院 A kind of electro-hydraulic integrated swash plate plunger type hydraulic transformer

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