CN208024514U - A kind of symmetrical shaft type quantifies axial plunger pump - Google Patents
A kind of symmetrical shaft type quantifies axial plunger pump Download PDFInfo
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- CN208024514U CN208024514U CN201820317518.1U CN201820317518U CN208024514U CN 208024514 U CN208024514 U CN 208024514U CN 201820317518 U CN201820317518 U CN 201820317518U CN 208024514 U CN208024514 U CN 208024514U
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Abstract
A kind of symmetrical shaft type quantifies axial plunger pump, belongs to hydraulic pump unit technical field, is made of transmission shaft, bearing, axial positioning sleeve, housing unit, middle casing, drive ball pair, part of cylinder block, plunger bearing, plunger and valve plate；Plunger pump structure is novel, control method clear principle, the number of plunger is increased in the case where not increasing volume, simplify pump body structure, plunger quantity is more and is arranged symmetrically relative to plunger bearing, form self-lubricating and self sealing structure, pump housing pulsation is small, effectively reduces noise, compared with traditional swash plate pump, inclined shaft pump, its quality is lighter, and the cost of production is lower, and key is that it efficiently solves the technological deficiencies such as pressure fluctuation, axial force, output is more steady, further reduced production cost.
Description
Technical field
The utility model belongs to hydraulic pump unit technical field, is related to a kind of plunger pump, more particularly to a kind of symmetrical logical
Shaft type quantifies axial plunger pump.
Background technology
One complete machine is mainly made of prime mover, transmission mechanism and working machine three parts.Transmission mechanism usually divides
For machine driving, Electrified Transmission and Fluid-transmission；Fluid-transmission is to carry out energy conversion, transmission and control by working media of fluid
The transmission of system, including liquid transmission and gas transmission.And realize the hydraulic pump of Fluid-transmission have gear pump, screw pump, vane pump,
The types such as piston pump.
Plunger pump is a kind of positive displacement pump, and by reciprocating motion of the plunger in cylinder body, confined space is big in change cylinder body
It is small to realize the sucking and discharge of liquid.It is easy to process and ensure higher to match since its main motion parts is cylinder
Precision is closed, thus can guarantee still there is higher volumetric efficiency under relatively high operating pressure.Radial plunger pump and axial plunger pump
It is type most commonly seen in plunger pump, axial plunger pump is the important equipment in hydraulic system, with effective and convenient variable etc.
Advantage is widely used in the fields such as industrial equipment, engineering machinery, traveling vehicle.Wherein, axial plunger pump can be divided into inclined disc type again
Axial plunger pump and angle type axial piston pump.When cylinder body axis and drive shaft axis overlap, referred to as cam-type axial piston
Pump；When cylinder body axis and drive shaft axis form angle, referred to as angle type axial piston pump.
The advantages of axial plunger pump, high, efficient, long lifespan, variable be convenient for parameter and form is more, unit power weight
It measures light, the equal compression chord of plunger pump major part and strength of materials performance can be fully utilized.The shortcomings that axial plunger pump is
Structure is more complex, and number of components is more, poor from absorption and pressure oscillation is big, and manufacturing process is more demanding, cost is more expensive, noise
Greatly.
Utility model content
The purpose of this utility model be for existing axial plunger pump noise level is excessively high, flow and pressure oscillation it is larger with
And axial force it is larger the defects of and production cost it is high the deficiencies of, propose that a kind of symmetrical shaft type quantifies axial plunger pump, not
The number that plunger is increased in the case of increasing volume, uses self sealing structure, simplifies pump body structure, reduce axial direction
Power keeps output more steady, can effectively solve the technological deficiencies such as pressure fluctuation, can effectively reduce noise, further decrease production
Cost.
The technical solution of the utility model is：A kind of symmetrical shaft type quantifies axial plunger pump, it is characterised in that：It is described fixed
Axial plunger pump is measured by transmission shaft, bearing, axial positioning sleeve, housing unit, middle casing, drive ball pair, part of cylinder block, plunger
Bearing, plunger and valve plate are constituted；The plunger bearing connection is arranged in the middle part of transmission shaft, the circumference side of the plunger bearing
To equipped with several cylindrical holes, left ball hinged support and right ball hinged support, the column are uniformly staggeredly equipped in the cylindrical hole
The left end for filling in bearing is equipped with Left Drive ball pair, and the right end of the plunger bearing is equipped with right drive ball pair, and the Left Drive ball is secondary outer
Side is equipped with left cylinder body component, and the secondary outside of right drive ball is equipped with right cylinder body component；The left cylinder body component and right cylinder body component
It is made of cylinder sleeve, cylinder body, axially position ring and ball countershaft to locating piece, the ball countershaft is arranged to locating piece in cylinder body
Portion, the axially position ring are fastened on the right side of cylinder body by sunk screw after carrying out axially position to locating piece to ball countershaft
On end face, the left side circumferencial direction of the cylinder body is equipped with several mounting hole of cylinder sleeve, and the cylinder is set on the cylinder sleeve
In mounting hole, left plunger is equipped between the cylinder sleeve and left ball hinged support in the left cylinder body component, in the right cylinder body component
Right plunger is equipped between cylinder sleeve and right ball hinged support, the secondary left side of the Left Drive ball is equipped with left axial positioning sleeve, the right transmission
The secondary right side of ball is equipped with right axial positioning sleeve, and left bearing, the right axial positioning sleeve right end are equipped on the left of the left axial positioning sleeve
Equipped with right bearing, it is arranged with left shell component on the left bearing, right shell body component, the left housing are arranged on the right bearing
Tilted structure of the inner face of body component and right shell body component with swash plate, one end is equipped on the swash plate of the left shell component
Left end shell pressure oil window, the other end are equipped with left end shell oil sucking window；One end is equipped with right end shell on the swash plate of the right shell body component
Pressure oil window, the other end are equipped with right end shell oil sucking window, and left end shell suction pressure oil window forms phase with right end shell suction pressure oil window
Angle；Left valve plate is equipped between the left shell component and left cylinder body component, between the right shell body component and right cylinder body component
Equipped with right valve plate, the left valve plate, right valve plate by elastic cylindrical pin respectively on left shell component, right shell body component
Oblique disk structure be connected, the middle casing be bolted by connection be fixed on left shell component and right shell body component it
Between, the outside of the middle casing is equipped with oil inlet and oil outlet, and the middle casing is internally provided with intermediate oil suction slot and centre
Pressure oil groove, the oil inlet are connected with intermediate oil suction slot, and the oil outlet is connected with intermediate pressure oil groove, the intermediate oil suction
The left end of slot is connected with the left end shell oil sucking window, the right end of the intermediate oil suction slot and the right end shell oil sucking window phase
Connection, the left end of the intermediate pressure oil groove are connected with the left end shell pressure oil window, the right end of the intermediate pressure oil groove and institute
Right end shell pressure oil window is stated to be connected.
The middle part of the transmission shaft is equipped with spline, the secondary and right drive ball of plunger bearing, Left Drive ball of matched connection
Sub-center is equipped with splined hole.
The left plunger is identical with the structure of right plunger, and one end of left and right plunger is spherical structure, and the other end is hemispherical
Structure, spherical structure and hemispherical dome structure are internally provided with interconnected elongated hole, and spherical structure is cut with scissors with left and right ball hinged support
It connects in succession and energy self-lubricating, hemispherical dome structure is slidably and sealingly connected with cylinder sleeve formation.
The left-external side of the left bearing is equipped with washer and sealing ring.
The left cylinder body component and secondary and right drive ball pair of right cylinder body component, Left Drive ball, left plunger and right plunger, left ball
Hinged-support and right ball hinged support are axisymmetricly arranged centered on plunger bearing.
The left end shell suction pressure oil window forms phase angle with right end shell suction pressure oil window, and the value range at phase angle is 3
~15 °.
The left plunger is identical with the number of right plunger, is 7~12.
The left valve plate is identical with the angle of inclination of right valve plate, and angle of inclination is 3~9 °.
The beneficial effects of the utility model are：A kind of symmetrical shaft type provided by the utility model quantifies axial plunger pump,
Plunger pump structure is novel, and operation principle is clear, and the number of plunger is increased in the case where not increasing volume, simplifies pump housing knot
Structure, plunger quantity is more and is arranged symmetrically relative to plunger bearing, forms self-lubricating and self sealing structure, pump housing pulsation is small,
Noise, axial force are effectively reduced, compared with traditional swash plate pump, inclined shaft pump, quality is lighter, and the cost of production is lower, closes
Key is that it efficiently solves the technological deficiencies such as pressure fluctuation, and output is more steady, further reduced production cost.
Description of the drawings
Fig. 1 is the utility model entirety complete section structural schematic diagram.
Fig. 2 is the utility model middle casing component complete section structural schematic diagram.
Fig. 3 is that the middle casing in the directions A-A in Fig. 2 removes section structure diagram.
Fig. 4 is the left shell component section structure diagram in the directions B-B in Fig. 2.
Fig. 5 is the right shell body component section structure diagram in the directions C-C in Fig. 2.
Fig. 6 is the intermediate hull construction schematic diagram that the directions D-D are rotated by 90 ° after cuing open in Fig. 3.
Fig. 7 is the directions E-E complete section structural schematic diagram in Fig. 5.
Complete section structural schematic diagram of the plunger bearing together with plunger and ball hinged support in Fig. 8 the utility model.
Fig. 9 is the complete section structural schematic diagram in the directions F-F in Fig. 8.
Figure 10 is the assembling structure schematic diagram of ball hinged support and plunger bearing in the utility model.
Figure 11 is the structural schematic diagram of part of cylinder block in the utility model.
Figure 12 is the sequence of movement schematic diagram of plunger in the utility model.
In figure：Transmission shaft 1, sealing ring 2, washer 3, left bearing 4, left valve plate 5, Left Drive ball pair 6, left cylinder body component 7,
Middle casing 8, plunger bearing 9, right cylinder body component 10, right drive ball pair 11, right valve plate 12, right bearing 13, right axially position
Set 14, right shell body component 15, connection bolt 16, right plunger 17, left plunger 18, left shell component 19, left axial positioning sleeve 20, into
Hydraulic fluid port 21, oil outlet 22, intermediate oil suction slot 23, intermediate pressure oil groove 24, left end shell pressure oil window 25, left end shell oil sucking window 26,
Right end shell pressure oil window 27, right end shell oil sucking window 28, swash plate 29, elastic cylindrical pin 30, left ball hinged support 31, right ball hinged support
32, splined hole 33, cylindrical hole 34, cylinder sleeve 35, cylinder body 36, sunk screw 37, axially position ring 38, ball countershaft are to locating piece
39, mounting hole of cylinder sleeve 40, elongated hole 41.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Fig. 1~Figure 11, a kind of symmetrical shaft type quantifies axial plunger pump, by transmission shaft 1, bearing, axially position
Set, housing unit, middle casing 8, drive ball pair, part of cylinder block, plunger bearing 9, plunger and valve plate are constituted；Plunger bearing 9
Connection is arranged at the middle part of transmission shaft 1, and the circumferencial direction of plunger bearing 9 is equipped with several cylindrical holes 34, in cylindrical hole 34
It is uniformly staggeredly equipped with left ball hinged support 31 and right ball hinged support 32, the left end of plunger bearing 9 is equipped with Left Drive ball pair 6, plunger branch
The right end of seat 9 is equipped with right drive ball pair 11, and 6 outside of Left Drive ball pair is equipped with left cylinder body component 7, and right 11 outside of drive ball pair is equipped with
Right cylinder body component 10；Left cylinder body component 7 and right cylinder body component 10 are by cylinder sleeve 35, cylinder body 36, axially position ring 38 and ball countershaft
It is constituted to locating piece 39, ball countershaft is arranged to locating piece 39 in the inside of cylinder body 36, and axially position ring 38 is to ball pair axially position
Part 39 is fastened on the right side of cylinder body 36 after carrying out axially position by sunk screw 37, the left side circumference of cylinder body 36
Direction is equipped with several mounting hole of cylinder sleeve 40, and cylinder sleeve 35 is arranged in mounting hole of cylinder sleeve 40, the cylinder sleeve 35 in left cylinder body component 7
It is equipped with left plunger 18 between left ball hinged support 31, the right side is equipped between the cylinder sleeve 35 and right ball hinged support 32 in right cylinder body component 10
Plunger 17,6 left side of Left Drive ball pair are equipped with left axial positioning sleeve 20, and right 11 right side of drive ball pair is equipped with right axial positioning sleeve 14,
20 left side of left axial positioning sleeve is equipped with left bearing 4, and 14 right end of right axial positioning sleeve is equipped with right bearing 13, is arranged on left bearing 4
Left shell component 19 is arranged with right shell body component 15, the inner face of left shell component 19 and right shell body component 15 on right bearing 13
Tilted structure with swash plate 29, one end is equipped with left end shell pressure oil window 25, the other end on the swash plate 29 of left shell component 19
Equipped with left end shell oil sucking window 26；One end is equipped with right end shell pressure oil window 27 on the swash plate 29 of right shell body component 15, and the other end is set
There are right end shell oil sucking window 28, left end shell suction pressure oil window to form phase angle with right end shell suction pressure oil window；Left shell component 19
It is equipped with left valve plate 5 between left cylinder body component 7, right valve plate 12 is equipped between right shell body component 15 and right cylinder body component 10,
Left valve plate 5, right valve plate 12 by elastic cylindrical pin 30 respectively with the swash plate knot on left shell component 19, right shell body component 15
Structure is connected, and middle casing 8 is fastened on by connecting bolt 16 between left shell component 19 and right shell body component 15, intermediate
The outside of shell 8 is equipped with oil inlet 21 and oil outlet 22, and middle casing 8 is internally provided with intermediate oil suction slot 23 and intermediate pressure oil groove
24, oil inlet 21 is connected with intermediate oil suction slot 23, and oil outlet 22 is connected with intermediate pressure oil groove 24, a left side for intermediate oil suction slot 23
End is connected with left end shell oil sucking window 26, and the right end of intermediate oil suction slot 23 is connected with right end shell oil sucking window 28, intermediate pressure
The left end of oil groove 24 is connected with left end shell pressure oil window 25, and the right end of intermediate pressure oil groove 24 is connected with right end shell pressure oil window 27
It is logical.
As shown in Figure 1, a kind of symmetrical shaft type quantifies axial plunger pump, the middle part of transmission shaft 1 is equipped with spline, matched
Plunger bearing 9, Left Drive ball pair 6 and secondary 11 centers of right drive ball of connection are equipped with splined hole 33.Left and right part of cylinder block 7, column
Plug bearing 9 and left and right drive ball pair 8 do constant angular velocity rotation by the drive of transmission shaft 1, ensure the circle of left and right plunger and cylinder sleeve 35
All constant angular velocity rotations；Ball countershaft makes part of cylinder block swing along the generation of ball secondary surface with drive ball pair to locating piece 39,
And be meshed with the external splines of drive ball pair by the internal spline of part of cylinder block, realize the transmission of circumference power.Transmission shaft, left and right
The spline number of part of cylinder block, plunger and left and right drive ball pair depends on being installed on the number of double hinge post plug assemblies on plunger part
Amount；Simultaneously the phase angle between double hinge post plug assemblies of plunger bearing or so also with transmission shaft and left and right cylinder body
The spline number of part, plunger part and left and right drive ball pair is related.Such as double hinge post plug assembly numbers when plunger bearing or so
When amount is respectively 12, such as there are phase difference, such as 15 ° of difference, then spline number is 12 teeth.
As shown in figure 8, a kind of symmetrical shaft type quantifies axial plunger pump, left plunger 18 is identical with the structure of right plunger 17,
One end of left and right plunger is spherical structure, and the other end is hemispherical dome structure, and spherical structure is internally provided with phase with hemispherical dome structure
Intercommunicated elongated hole 41, spherical structure are articulated and connected with left and right ball hinged support, and hemispherical dome structure is slidingly sealed with cylinder sleeve formation
Connection.When being filled with highly pressurised liquid, forces plunger (hemispherical dome structure one end) inner cavity in left and right under oil pressure effect, radially send out
Raw micro swell, plunger spherical outside surface form the line contact sealing of sliding with inboard wall of cylinder liner.
As shown in Figure 1, a kind of symmetrical shaft type quantifies axial plunger pump, the left-external side of left bearing is equipped with washer 3 and sealing
Circle 2；Left cylinder body component 7 and right cylinder body component 10, Left Drive ball pair 6 and right drive ball pair 11, left plunger 18 and right plunger 17, a left side
Ball hinged support 31 and right ball hinged support 32 are axisymmetricly arranged centered on plunger bearing 9.Cylinder sleeve passes through interference fit and cylinder
Body connects firmly, and realizes the movement of part of cylinder block to locating piece and the cooperation of drive ball pair by ball countershaft, completes double hinges within the scope of one week
The relative motion of plunger and cylinder sleeve and being pumped into, pumping out for liquid；Left and right part of cylinder block constitutes Port Plate Pair and oil with left and right valve plate
Road.
As shown in Figure 1, a kind of symmetrical shaft type quantifies axial plunger pump, left end shell suction pressure oil window and right end shell suction pressure oil
Window forms phase angle, and the value range at phase angle is 3~15 °.
As shown in figure 8, a kind of symmetrical shaft type quantifies axial plunger pump, left plunger 18 is identical with the number of right plunger 17,
It is 7~12；Left valve plate 5 is identical with the angle of inclination of right valve plate 12, and angle of inclination is 3~9 °.
The utility model plunger pump structure is novel, and operation principle is clear, and plunger is increased in the case where not increasing volume
Number, simplify pump body structure, plunger quantity is more and is arranged symmetrically relative to plunger bearing, forms self-lubricating and self sealss
Structure, pump housing pulsation is small, effectively reduces noise, axial force, and compared with traditional swash plate pump, inclined shaft pump, quality is lighter,
The cost of production is lower, and key is that it efficiently solves the technological deficiencies such as pressure fluctuation, and output is more steady, further decreases
Production cost.
Claims (8)
1. a kind of symmetrical shaft type quantifies axial plunger pump, it is characterised in that：The quantitative axial plunger pump by transmission shaft (1),
Bearing, axial positioning sleeve, housing unit, middle casing (8), drive ball pair, part of cylinder block, plunger bearing (9), plunger and flow
Disk is constituted；Plunger bearing (9) connection is arranged at the middle part of transmission shaft (1), and the circumferencial direction of the plunger bearing (9) is equipped with
Several cylindrical holes (34) are uniformly staggeredly equipped with left ball hinged support (31) and right ball hinged support in the cylindrical hole (34)
(32), the left end of the plunger bearing (9) is equipped with Left Drive ball pair (6), and the right end of the plunger bearing (9) is equipped with right drive ball
Secondary (11), the Left Drive ball secondary (6) outside are equipped with left cylinder body component (7), right cylinder are equipped on the outside of the right drive ball secondary (11)
Body component (10)；The left cylinder body component (7) and right cylinder body component (10) are by cylinder sleeve (35), cylinder body (36), axially position ring
(38) it is constituted to locating piece (39) with ball countershaft, the ball countershaft is arranged to locating piece (39) in the inside of cylinder body (36), described
Axially position ring (38) by sunk screw (37) is fastened on cylinder after carrying out axially position to locating piece (39) to ball countershaft
On the right side of body (36), the left side circumferencial direction of the cylinder body (36) is equipped with several mounting hole of cylinder sleeve (40), described
Cylinder sleeve (35) setting is in the mounting hole of cylinder sleeve (40), the cylinder sleeve (35) in the left cylinder body component (7) and left ball hinged support
(31) it is equipped with left plunger (18) between, is equipped between the cylinder sleeve (35) and right ball hinged support (32) in the right cylinder body component (10)
Right plunger (17), the Left Drive ball secondary (6) left side are equipped with left axial positioning sleeve (20), are set on the right side of the right drive ball secondary (11)
There is right axial positioning sleeve (14), left bearing (4), the right axial positioning sleeve (14) are equipped on the left of the left axial positioning sleeve (20)
Right end is equipped with right bearing (13), is arranged with left shell component (19) on the left bearing (4), is arranged on the right bearing (13)
The inner face of right shell body component (15), the left shell component (19) and right shell body component (15) the tilting with swash plate (29)
Structure, one end is equipped with left end shell pressure oil window (25) on the swash plate (29) of the left shell component (19), and the other end is equipped with left end
Shell oil sucking window (26)；One end is equipped with right end shell pressure oil window (27) on the swash plate (29) of the right shell body component (15), another
End is equipped with right end shell oil sucking window (28), and left end shell suction pressure oil window forms phase angle with right end shell suction pressure oil window；The left side
Left valve plate (5), the right shell body component (15) and right cylinder body component are equipped between housing unit (19) and left cylinder body component (7)
(10) between be equipped with right valve plate (12), the left valve plate (5), right valve plate (12) by elastic cylindrical pin (30) respectively with
Oblique disk structure on left shell component (19), right shell body component (15) is connected, and the middle casing (8) is by connecting bolt
(16) be fastened between left shell component (19) and right shell body component (15), the outside of the middle casing (8) be equipped with into
Hydraulic fluid port (21) and oil outlet (22), the middle casing (8) are internally provided with intermediate oil suction slot (23) and intermediate pressure oil groove (24), institute
It states oil inlet (21) with intermediate oil suction slot (23) to be connected, the oil outlet (22) is connected with intermediate pressure oil groove (24), described
The left end of intermediate oil suction slot (23) is connected with the left end shell oil sucking window (26), the right end of the intermediate oil suction slot (23) with
The right end shell oil sucking window (28) is connected, left end and the left end shell pressure oil window (25) of the intermediate pressure oil groove (24)
It is connected, the right end of the intermediate pressure oil groove (24) is connected with the right end shell pressure oil window (27).
2. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The transmission shaft
(1) middle part is equipped with spline, plunger bearing (9), Left Drive ball secondary (6) and secondary (11) center of right drive ball of matched connection
It is equipped with splined hole (33).
3. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The left plunger
(18) identical with the structure of right plunger (17), one end of left and right plunger is spherical structure, and the other end is hemispherical dome structure, spherical junctions
Structure and hemispherical dome structure are internally provided with interconnected elongated hole (41), and spherical structure is articulated and connected with left and right ball hinged support,
Hemispherical dome structure is slidably and sealingly connected with cylinder sleeve formation.
4. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The left bearing
Left-external side is equipped with washer (3) and sealing ring (2).
5. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The left cylinder portion
Part (7) and right cylinder body component (10), Left Drive ball secondary (6) and right drive ball secondary (11), left plunger (18) and right plunger (17), a left side
Ball hinged support (31) and right ball hinged support (32) are axisymmetricly arranged centered on plunger bearing (9).
6. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The left end shell is inhaled
Pressure oil window forms phase angle with right end shell suction pressure oil window, and the value range at phase angle is 3~15 °.
7. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The left plunger
(18) identical with the number of right plunger (17), it is 7~12.
8. a kind of symmetrical shaft type according to claim 1 quantifies axial plunger pump, it is characterised in that：The left valve plate
(5) identical with the angle of inclination of right valve plate (12), angle of inclination is 3~9 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820317518.1U CN208024514U (en) | 2018-03-07 | 2018-03-07 | A kind of symmetrical shaft type quantifies axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820317518.1U CN208024514U (en) | 2018-03-07 | 2018-03-07 | A kind of symmetrical shaft type quantifies axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208024514U true CN208024514U (en) | 2018-10-30 |
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ID=63905409
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820317518.1U Active CN208024514U (en) | 2018-03-07 | 2018-03-07 | A kind of symmetrical shaft type quantifies axial plunger pump |
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| CN (1) | CN208024514U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107800A (en) * | 2021-05-17 | 2021-07-13 | 燕山大学 | Forced self-cooling inclined shaft type plunger pump with oil inlet of shell |
-
2018
- 2018-03-07 CN CN201820317518.1U patent/CN208024514U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107800A (en) * | 2021-05-17 | 2021-07-13 | 燕山大学 | Forced self-cooling inclined shaft type plunger pump with oil inlet of shell |
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