CN115711212A - Compact type duplex variable plunger pump - Google Patents
Compact type duplex variable plunger pump Download PDFInfo
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- CN115711212A CN115711212A CN202211627486.2A CN202211627486A CN115711212A CN 115711212 A CN115711212 A CN 115711212A CN 202211627486 A CN202211627486 A CN 202211627486A CN 115711212 A CN115711212 A CN 115711212A
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Abstract
The invention discloses a compact duplex variable plunger pump, which comprises a front pump and a rear pump; the front pump and the rear pump are fixedly connected into a whole through an intermediate body in a bottom opposite mode, the intermediate body is provided with a central through hole in a penetrating mode along the axis, and the intermediate body is provided with a front end positioning table board, a front end positioning cavity, a rear end positioning table board and a rear end positioning cavity in a molding mode; the bottom surface of a front pump shell of the front pump is matched with the front end positioning table top of the intermediate body in a sealing and press-fitting manner, and a front pump oil distribution disc of the front pump is press-fitted in the front end positioning cavity of the intermediate body; the bottom surface of the rear pump shell of the rear pump is matched with the rear end positioning table surface of the intermediate body in a sealing and press-fitting manner, and the rear pump oil distribution disc of the rear pump is pressed in the rear end positioning cavity of the intermediate body; the intermediate body is formed with a common oil inlet, a front pump oil outlet and a rear pump oil outlet. The invention has small volume and compact structure, and can effectively reduce the difficulty of the arrangement of pipelines in the system.
Description
Technical Field
The invention relates to the technical field of variable plunger pumps, in particular to a duplex variable plunger pump applied to engineering machinery, and specifically relates to a compact duplex variable plunger pump.
Background
In actual work, because the working conditions faced by the engineering machinery are complex, two or more oil ways are often needed in a hydraulic system to realize hydraulic control, so that a power element in the hydraulic system often adopts a double-pump series structure, namely two single-connection plunger pumps are connected in series. As shown in fig. 1, a front pump 1 and a rear pump 2 of a conventional dual variable displacement plunger pump are generally connected into a whole by a flange F, and a shaft of the front pump 1 is connected with a shaft of the rear pump 2 by a connecting sleeve L to realize series driving. This kind of series connection mode leads to the double pump total volume too big to between ring flange F and the preceding pump 1, all need install one O ring additional between ring flange F and the back pump 2 sealed, this risk that has also increased whole oil leak, the pump has respective business turn over hydraulic fluid port respectively around simultaneously, has also increased the degree of difficulty of pipeline arrangement in the entire system.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a compact duplex variable plunger pump which is small in size, compact in structure and capable of sharing one oil inlet.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a compact duplex variable plunger pump comprises a front pump and a rear pump; the front pump and the rear pump are fixedly connected into a whole through an intermediate body in a mode that the bottoms of the two pumps are opposite, the intermediate body is provided with a central through hole which is used for conveniently realizing serial driving of transmission shafts of the two pumps along the axis in a penetrating way, the front end of the intermediate body is provided with a front end positioning table board and a front end positioning cavity which is coaxial with the central through hole in a forming way, and the rear end of the intermediate body is provided with a rear end positioning table board and a rear end positioning cavity which is coaxial with the central through hole in a forming way; the bottom surface of a front pump shell of the front pump is matched with the front end positioning table surface of the intermediate body in a sealing and press-fitting manner, and a front pump oil distribution disc of the front pump is rotationally and press-fitted in a front end positioning cavity of the intermediate body; the bottom surface of a rear pump shell of the rear pump is matched with the rear end positioning table top of the intermediate body in a sealing and press-fitting manner, and a rear pump oil distribution disc of the rear pump is press-fitted in a rear end positioning cavity of the intermediate body in a rotation-preventing manner; the middle body is formed with a common oil inlet which can simultaneously provide hydraulic oil for the front pump and the rear pump, a front pump oil outlet which is used for discharging high-pressure oil generated by the front pump, and a rear pump oil outlet which is used for discharging high-pressure oil generated by the rear pump.
In order to optimize the technical scheme, the specific measures adopted further comprise:
a front pump sealing groove is formed in the bottom surface of the front pump shell, and a front pump sealing ring is clamped in the front pump sealing groove; the bottom surface of the rear pump shell is formed with a rear pump sealing groove, and a rear pump sealing ring is clamped in the rear pump sealing groove.
The transmission shaft of the front pump and the transmission shaft of the rear pump are connected in a series driving mode through the sleeved coupling sleeve, the outer peripheral surfaces of the tail portions of the transmission shafts of the two pumps are respectively provided with an external spline, and the inner wall of a sleeve hole of the coupling sleeve is provided with an internal spline which is used for being meshed with the external spline on the transmission shaft.
A front end positioning pin is fixedly arranged in the front end positioning cavity, and a front end positioning pin hole for inserting and positioning the front end positioning pin is formed in the bottom surface of the oil distribution disc of the front pump; the rear end positioning cavity is fixedly provided with a rear end positioning pin, and the bottom surface of the oil distribution disc of the rear pump is provided with a rear end positioning pin hole for inserting and positioning the rear end positioning pin.
The circumferential included angle of the front pump oil outlet and the rear pump oil outlet on the intermediate body is 0 degree, and the distance between the common oil inlet and the front pump oil outlet on the intermediate body is 180 degrees.
A front pump oil inlet channel, a rear pump oil inlet channel, a front pump oil outlet channel and a rear pump oil outlet channel are symmetrically formed in the intermediate body; the front pump oil inlet channel is used for communicating a public oil inlet with an oil suction hole in the front pump oil distribution disc, and the rear pump oil inlet channel is used for communicating the public oil inlet with an oil suction hole in the rear pump oil distribution disc; the front pump oil outlet channel is used for communicating the front pump oil outlet with an oil discharge hole in the front pump oil distribution disc, and the rear pump oil outlet channel is used for communicating the rear pump oil outlet with an oil discharge hole in the rear pump oil distribution disc.
Bearing positioning cavities are symmetrically processed at two ends of the central through hole, and rolling bearings for rotatably supporting the transmission shaft are installed in the bearing positioning cavities.
A bearing positioning cavity is processed at the front end of the central through hole, and a rolling bearing for rotatably supporting a transmission shaft of the front pump is arranged in the bearing positioning cavity; the central through hole extends from back to front to be expanded to form an assembly cavity, the common oil inlet penetrates through the assembly cavity, and a supercharging impeller and a distribution fluid are sequentially arranged in the assembly cavity; the booster impeller is in driving connection with a transmission shaft of the front pump and is used for rotationally increasing the oil supply pressure of hydraulic oil; an oil distribution pore channel for distributing oil for a rear pump oil distribution disc of a rear pump is formed in the distribution fluid, and an oil distribution pore channel for distributing oil for a front pump oil distribution disc of a front pump is formed in the front part of the intermediate body.
A rolling bearing for rotatably supporting a transmission shaft of the rear pump is fixedly arranged on the fluid distribution body; the back end of the coupling sleeve is sleeved in the shaft hole of the fluid in a liquid-tight and rotating manner, and the front end of the coupling sleeve is tightly matched and connected with the shaft hole of the supercharging impeller.
And a limiting sleeve for preventing the rotation of the fluid is inserted in the oil outlet of the rear pump.
Compared with the prior art, the front pump and the rear pump are fixedly connected into a whole through the intermediate body in a mode that the bottoms of the front pump and the rear pump are opposite, the common oil inlet, the front pump oil outlet and the rear pump oil outlet are formed in the intermediate body, and the difficulty of pipeline arrangement in a system can be effectively reduced by adopting the design scheme of one oil inlet and two oil outlets. The intermediate body of the invention can be used as the back cover of two pumps, so that the oil distribution disc of the front pump can be directly pressed at the front end of the intermediate body, and the oil distribution disc of the back pump can be directly pressed at the back end of the intermediate body, thereby reducing the total length of the pump, reducing the volume of the pump and saving the assembly space.
Drawings
FIG. 1 is a schematic diagram of a conventional dual variable displacement plunger pump;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a cross-sectional structural view of FIG. 2;
FIG. 4 is a schematic structural view of an intermediate of the assembly of the present invention;
FIG. 5 is a schematic diagram of the construction of an assembled intermediate body with a pressurized structure of the present invention.
Fig. 6 is a schematic view of the assembly of the intermediate body with a pressurizing structure and the pressurizing impeller of the present invention.
The reference numerals referred to in the figures are: the oil pump comprises a front pump oil inlet channel d1, a rear pump oil inlet channel d2, a front pump oil outlet channel d3, a rear pump oil outlet channel d4, a flange F, a connecting sleeve L, a central through hole K, an assembling cavity K1, a front pump sealing ring M1, a rear pump sealing ring M2, a front end positioning pin X1, a rear end positioning pin X2, a transmission shaft Z, a front pump 1, a front pump shell 11, a front pump oil distribution disc 12, a rear pump 2, a rear pump shell 21, a rear pump oil distribution disc 22, an intermediate body 3, a common oil inlet 3a, a front pump oil outlet 3b, a rear pump oil outlet 3c, a front end positioning table board 31, a front end positioning cavity 32, a rear end positioning table board 33, a rear end positioning cavity 34, a coupling sleeve 4, a rolling bearing 5, a supercharging impeller 6, a fluid distribution body 7 and a limiting sleeve 8.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a conventional dual variable displacement plunger pump, and it can be seen from fig. 1 that a front pump 1 and a rear pump 2 are connected by a flange F in an end-to-end manner. The transmission shaft of the front pump 1 and the transmission shaft of the rear pump 2 realize series driving through a connecting sleeve L. The double variable plunger pump with the structure has relatively large volume because the two single pumps are simply connected in series through the flange F, and the difficulty of pipeline arrangement of the whole hydraulic system is increased virtually because each single pump is provided with the oil inlet and the oil outlet. Therefore, the invention provides a compact duplex variable plunger pump, the length of the compact duplex variable plunger pump can be shortened by one ninth compared with the length of the traditional duplex variable plunger pump, the installation space is greatly saved, the weight is lightened to a certain extent, and particularly, one oil inlet can be reduced in the pump of the invention, so that the arrangement of the hydraulic system pipeline of the whole pump can be simplified.
As shown in fig. 2 to 6, the compact dual variable displacement plunger pump of the present invention comprises a front pump 1 and a rear pump 2, wherein the front pump 1 and the rear pump 2 are fixedly connected to each other through an intermediate body 3 in a bottom-to-bottom manner. The back cover which can be used as two pumps directly by the intermediate body 3 is installed in a manner that the bottom parts are opposite to each other, so that the two pumps do not need to be separately provided with the back covers. The intermediate body 3 is provided with a central through hole K along the axis through processing, and the central through hole K can facilitate the transmission shafts Z of the two pumps to penetrate through the central through hole K to be connected, so that series driving is realized. As shown in fig. 4 and 5, the front end of the intermediate body 3 is formed with a front end positioning table 31 and a front end positioning cavity 32 coaxial with the central through hole K. The rear end of the intermediate body 3 is formed with a rear end positioning table 33 and a rear end positioning cavity 34 coaxial with the central through hole K. The front pump 1 is assembled by a front pump shell 11, a transmission shaft Z, a front pump cylinder body, a front pump swash plate, a front pump oil distribution disc 12 and the like. The rear pump 2 is assembled by a rear pump case 21, a transmission shaft Z, a rear pump cylinder block, a rear pump swash plate, a rear pump oil distribution plate 22 and the like. Because both pumps do not have the rear covers of the rear traditional pumps, the front end positioning table surface 31 of the middle body 3 is directly matched with the bottom surface of the front pump shell 11 in a sealing and press-fitting mode, and the oil distribution disc 12 of the front pump is rotationally and press-fitted in the front end positioning cavity 32 of the middle body 3. The rear end positioning table 33 of the intermediate body 3 is matched with the bottom surface of the rear pump shell 21 in a sealing and press-fitting manner, and the oil distribution disc 22 of the rear pump is press-fitted in a rear end positioning cavity 34 of the intermediate body 3 in a rotation-preventing manner. The intermediate body 3 is formed with a common oil inlet 3a, a front pump oil outlet 3b and a rear pump oil outlet 3c. The common oil inlet 3a is used for supplying the front pump 1 and the rear pump 2 with hydraulic oil, i.e. the front pump 1 and the rear pump 2 share this common oil inlet 3a. The front pump oil outlet 3b is used for discharging high-pressure oil generated by the front pump 1, and the rear pump oil outlet 3c is used for discharging high-pressure oil generated by the rear pump 2. The oil inlet and the oil outlet of the front pump and the rear pump are both arranged on the intermediate body 3, and the front pump and the rear pump share one oil inlet, so that the number of the pipes of the hydraulic system of the main machine can be effectively reduced, the whole length of the double pumps is shortened, and the power density is improved.
In order to enhance the sealability between the front pump casing 11 and the intermediate body 3 and between the rear pump casing 21 and the intermediate body 3. In the embodiment, a front pump sealing groove is formed in the bottom surface of the front pump shell 11, a front pump sealing ring M1 is clamped in the front pump sealing groove, and the front pump sealing ring M1 is hermetically pressed between the front pump shell 11 and the intermediate body 3. A rear pump sealing groove is formed in the bottom surface of the rear pump shell 21, a rear pump sealing ring M2 is clamped in the rear pump sealing groove, and the rear pump sealing ring M2 is hermetically pressed between the rear pump shell 21 and the intermediate body 3.
As shown in fig. 3, a coupling sleeve 4 is rotatably disposed in the intermediate body 3, and a transmission shaft Z of the front pump 1 and a transmission shaft Z of the rear pump 2 are connected in series through the coupling sleeve 4. The transmission shaft Z of the two pumps is connected with the coupling sleeve 4 in a spline fit mode, an external spline is processed on the peripheral surface of the tail part of the transmission shaft Z, and an internal spline which is used for being meshed with the external spline on the transmission shaft Z is formed on the inner wall of a sleeve hole of the coupling sleeve 4.
In the embodiment, in order to prevent the oil distribution discs of the two pumps from rotating, as shown in fig. 3, a front end positioning pin X1 is fixedly installed in the front end positioning cavity 32 of the intermediate body 3, and a front end positioning pin hole for inserting and positioning the front end positioning pin X1 is formed in the bottom surface of the front pump oil distribution disc 12. Similarly, a rear end positioning pin X2 is fixedly installed in the rear end positioning cavity 34 of the intermediate body 3, and a rear end positioning pin hole for inserting and positioning the rear end positioning pin X2 is formed in the bottom surface of the rear pump oil distribution disc 22.
In order to facilitate the arrangement and installation of the pipelines, in the embodiment, the circumferential included angle between the front pump oil outlet 3b and the rear pump oil outlet 3c on the intermediate body 3 is 0 degree, and the distance between the common oil inlet 3a and the front pump oil outlet 3b on the circumferential direction of the intermediate body 3 is 180 degrees.
In the embodiment, as shown in fig. 4, a front pump oil inlet port d1 and a rear pump oil inlet port d2, a front pump oil outlet port d3, and a rear pump oil outlet port d4 are symmetrically formed in the intermediate body 3 of the present invention. The front pump oil inlet channel d1 is used for communicating the public oil inlet 3a with an oil suction hole on the front pump oil distribution disc 12, and the rear pump oil inlet channel d2 is used for communicating the public oil inlet 3a with an oil suction hole on the rear pump oil distribution disc 22. The front pump oil outlet channel d3 is used for communicating the front pump oil outlet 3b with an oil discharge hole in the front pump oil distribution disc 12, and the rear pump oil outlet channel d4 is used for communicating the rear pump oil outlet 3c with an oil discharge hole in the rear pump oil distribution disc 22.
In order to rotatably support the transmission shaft Z of the two pumps, in the embodiment, bearing positioning cavities are symmetrically processed at two ends of the central through hole K of the intermediate body 3, and rolling bearings 5 for rotatably supporting the transmission shaft Z are installed in the bearing positioning cavities.
Fig. 4 shows a middle body 3 with a structure assembled by the present invention, and the present invention can also assemble a middle body 3 with a pressurizing structure, as shown in fig. 5 and fig. 6, the middle body 3 with a pressurizing structure can pressurize the supplied hydraulic oil because the pressurizing impeller 6 is installed inside, so that the rotating speed and the use pressure of the two pumps can be improved to a certain extent. The front end of the central through hole K of the intermediate body 3 with the pressurizing structure is provided with a bearing positioning cavity, and a rolling bearing 5 for rotatably supporting a transmission shaft Z of the front pump 1 is arranged in the bearing positioning cavity. Because the diameter of the supercharging impeller 6 is relatively large, in order to facilitate installation, the central through hole K of the intermediate body 3 with the supercharging structure extends from back to front to be expanded to form an assembly cavity K1, and the common oil inlet 3a penetrates through the assembly cavity K1. The booster impeller 6 is rotatably disposed at the bottom of the mounting chamber K1. The aperture of the assembly cavity K1 is relatively large, so that an oil inlet and outlet channel cannot be processed at the right end of the intermediate body 3 with the pressurization structure, a distribution fluid 7 is additionally arranged at the right end port of the assembly cavity K1, the distribution fluid 7 is in butt joint and matching with a rear pump oil distribution disc 22 of the rear pump 2, an oil distribution channel for distributing oil to the rear pump oil distribution disc 22 of the rear pump 2 is formed in the distribution fluid 7, and the oil distribution channel in the distribution fluid 7 comprises a channel for communicating a common oil inlet 3a with an oil suction port of the rear pump oil distribution disc 22 and a channel for communicating an oil outlet of the rear pump oil distribution disc 22 with an oil outlet 3c of the rear pump. An oil distribution pore canal for distributing oil of a front pump oil distribution disc 12 of the front pump 1 is formed in the front part of the intermediate body 3 with the pressurization structure, and similarly, the oil distribution pore canal comprises a pore canal for communicating a common oil inlet 3a with an oil suction port of the front pump oil distribution disc 12 and a pore canal for communicating an oil discharge port of the front pump oil distribution disc 12 with an oil outlet 3b of the front pump. The booster impeller 6 is connected with a transmission shaft Z of the front pump 1 in a driving mode, and the booster impeller 6 can rotate along with the transmission shaft Z of the front pump 1 to improve the oil supply pressure of hydraulic oil.
In the embodiment shown in fig. 3, a rolling bearing 5 for rotatably supporting the drive shaft Z of the rear pump 2 is fixedly mounted on the distribution body 7. The rear end of the coupling sleeve 4 is sleeved in the shaft hole of the fluid 7 in a liquid-tight and rotating manner, and the front end of the coupling sleeve 4 is tightly matched and connected with the shaft hole of the supercharging impeller 6.
In the embodiment shown in fig. 6, since the intermediate body 3 with the pressurizing structure needs to be separately provided with the distributing body 7, in order to prevent the distributing body 7 from axially moving and circumferentially rotating, the invention inserts the limiting sleeve 8 into the rear pump oil outlet 3c, and the limiting sleeve 8 is inserted and positioned in and matched with the limiting hole formed in the distributing body 7.
While the preferred embodiments of the present invention have been illustrated, various changes and modifications can be made by one skilled in the art without departing from the scope of the present invention.
Claims (10)
1. A compact duplex variable plunger pump comprises a front pump (1) and a rear pump (2); the method is characterized in that: the front pump (1) and the rear pump (2) are fixedly connected into a whole through an intermediate body (3) in a mode that the bottoms of the two pumps are opposite, the intermediate body (3) is provided with a central through hole (K) which is used for conveniently enabling a transmission shaft (Z) of the two pumps to realize serial driving along the axis in a penetrating mode, the front end of the intermediate body (3) is provided with a front end positioning table top (31) and a front end positioning cavity (32) which is coaxial with the central through hole (K), and the rear end of the intermediate body (3) is provided with a rear end positioning table top (33) and a rear end positioning cavity (34) which is coaxial with the central through hole (K); the bottom surface of a front pump shell (11) of the front pump (1) is matched with a front end positioning table top (31) of the intermediate body (3) in a sealing and press-fitting mode, and a front pump oil distribution disc (12) of the front pump (1) is press-fitted in a front end positioning cavity (32) of the intermediate body (3) in a rotation-preventing mode; the bottom surface of a rear pump shell (21) of the rear pump (2) is matched with a rear end positioning table surface (33) of the intermediate body (3) in a sealing and press-fitting manner, and a rear pump oil distribution disc (22) of the rear pump (2) is press-fitted in a rear end positioning cavity (34) of the intermediate body (3) in a rotation-preventing manner; the middle body (3) is formed with a common oil inlet (3 a) which can simultaneously provide hydraulic oil for the front pump (1) and the rear pump (2), a front pump oil outlet (3 b) used for discharging high-pressure oil generated by the front pump (1) and a rear pump oil outlet (3 c) used for discharging high-pressure oil generated by the rear pump (2).
2. A compact dual variable displacement plunger pump as set forth in claim 1, wherein: a front pump sealing groove is formed in the bottom surface of the front pump shell (11), and a front pump sealing ring (M1) is clamped in the front pump sealing groove; and a rear pump sealing groove is formed in the bottom surface of the rear pump shell (21), and a rear pump sealing ring (M2) is clamped in the rear pump sealing groove.
3. A compact twin variable displacement piston pump as defined in claim 2 in which: the transmission shaft (Z) of the front pump (1) is connected with the transmission shaft (Z) of the rear pump (2) in a series driving mode through a sleeved coupling sleeve (4), external splines are machined on the outer peripheral surfaces of the tail portions of the transmission shafts (Z) of the two pumps, and internal splines meshed with the external splines on the transmission shafts (Z) are formed on the inner wall of a sleeve hole of the coupling sleeve (4).
4. A compact dual variable displacement plunger pump as set forth in claim 3, wherein: a front end positioning pin (X1) is fixedly arranged in the front end positioning cavity (32), and a front end positioning pin hole for inserting and positioning the front end positioning pin (X1) is formed in the bottom surface of the front pump oil distribution disc (12); a rear end positioning pin (X2) is fixedly arranged in the rear end positioning cavity (34), and a rear end positioning pin hole for inserting and positioning the rear end positioning pin (X2) is formed in the bottom surface of the oil distribution disc (22) of the rear pump.
5. The compact dual variable displacement plunger pump of claim 4, wherein: the circumferential included angle of the front pump oil outlet (3 b) and the rear pump oil outlet (3 c) on the intermediate body (3) is 0 degree, and the circumferential distance between the common oil inlet (3 a) and the front pump oil outlet (3 b) on the intermediate body (3) is 180 degrees.
6. A compact twin variable displacement piston pump as claimed in claim 5 in which: a front pump oil inlet channel (d 1), a rear pump oil inlet channel (d 2), a front pump oil outlet channel (d 3) and a rear pump oil outlet channel (d 4) are symmetrically formed in the intermediate body (3) from left to right; the front pump oil inlet channel (d 1) is used for communicating a public oil inlet (3 a) with an oil suction hole in a front pump oil distribution disc (12), and the rear pump oil inlet channel (d 2) is used for communicating the public oil inlet (3 a) with an oil suction hole in a rear pump oil distribution disc (22); the front pump oil outlet channel (d 3) is used for communicating the front pump oil outlet (3 b) with an oil discharge hole on the front pump oil distribution disc (12), and the rear pump oil outlet channel (d 4) is used for communicating the rear pump oil outlet (3 c) with an oil discharge hole on the rear pump oil distribution disc (22).
7. A compact dual variable displacement plunger pump as set forth in claim 6, wherein: bearing positioning cavities are symmetrically processed at two ends of the central through hole (K), and rolling bearings (5) used for rotatably supporting the transmission shaft (Z) are installed in the bearing positioning cavities.
8. A compact dual variable displacement plunger pump as set forth in claim 5, wherein: a bearing positioning cavity is processed at the front end of the central through hole (K), and a rolling bearing (5) for rotatably supporting a transmission shaft (Z) of the front pump (1) is arranged in the bearing positioning cavity; the central through hole (K) extends from back to front to be expanded to form an assembly cavity (K1), the common oil inlet (3 a) penetrates through the assembly cavity (K1), and a booster impeller (6) and a fluid distribution body (7) are sequentially arranged in the assembly cavity (K1); the booster impeller (6) is in driving connection with a transmission shaft (Z) of the front pump (1), and the booster impeller (6) is used for improving the oil supply pressure of hydraulic oil in a rotating mode; an oil distribution pore passage for distributing oil for a rear pump oil distribution disc (22) of the rear pump (2) is formed in the distribution fluid (7), and an oil distribution pore passage for distributing oil for a front pump oil distribution disc (12) of the front pump (1) is formed in the front part of the intermediate body (3).
9. A compact dual variable displacement plunger pump as set forth in claim 8, wherein: a rolling bearing (5) for rotatably supporting a transmission shaft (Z) of the rear pump (2) is fixedly arranged on the fluid distribution body (7); the rear end of the coupling sleeve (4) is sleeved in a shaft hole of the fluid distribution body (7) in a liquid-tight and rotating mode, and the front end of the coupling sleeve (4) is connected with the shaft hole of the supercharging impeller (6) in a tight fit mode.
10. A compact twin variable displacement piston pump as defined in claim 8 in which: a limiting sleeve (8) for preventing the distribution body (7) from rotating is inserted in the oil outlet (3 c) of the rear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627486.2A CN115711212A (en) | 2022-12-17 | 2022-12-17 | Compact type duplex variable plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627486.2A CN115711212A (en) | 2022-12-17 | 2022-12-17 | Compact type duplex variable plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN115711212A true CN115711212A (en) | 2023-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211627486.2A Pending CN115711212A (en) | 2022-12-17 | 2022-12-17 | Compact type duplex variable plunger pump |
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| Country | Link |
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| CN (1) | CN115711212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733712A (en) * | 2023-07-18 | 2023-09-12 | 江苏津润液压股份有限公司 | Impeller supercharging sloping cam type axial plunger double pump |
-
2022
- 2022-12-17 CN CN202211627486.2A patent/CN115711212A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733712A (en) * | 2023-07-18 | 2023-09-12 | 江苏津润液压股份有限公司 | Impeller supercharging sloping cam type axial plunger double pump |
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