CN113007050A - Detachable double-row three-plunger pump - Google Patents
Detachable double-row three-plunger pump Download PDFInfo
- Publication number
- CN113007050A CN113007050A CN202110289391.3A CN202110289391A CN113007050A CN 113007050 A CN113007050 A CN 113007050A CN 202110289391 A CN202110289391 A CN 202110289391A CN 113007050 A CN113007050 A CN 113007050A
- Authority
- CN
- China
- Prior art keywords
- plunger
- row
- plunger pump
- plungers
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000033001 locomotion Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000004323 axial length Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0421—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a double-row three-plunger pump, which comprises: the pump body that is the column setting, the pump body includes: the first body is detachably connected with the second body, and the axis of the first body is superposed with the axis of the second body; the first body is provided with three first plungers along its circumference, and the second body is provided with three second plungers along its circumference. The double-row plunger is arranged, so that the discharge capacity and the flow of the pump body are increased, and the difference between the axial length and the radial length of the pump body is reduced, so that the structure of the pump body is more regular and compact; the first body is detachably connected with the second body, so that the difficulty and cost of manufacturing, processing, using and maintaining are reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic equipment, in particular to a detachable double-row three-plunger pump.
Background
The plunger pump is an important hydraulic device and is divided into an axial plunger pump and a radial plunger pump, and compared with other pumps, the plunger pump is more pressure-resistant, impact-resistant and higher in efficiency.
Generally, the plungers in the radial plunger pump are radially arranged, and only one row of plungers is arranged in the axial direction, so that the radial size is large, the axial size is small, the structural advantages of the radial plunger pump can be better exerted if a plurality of plungers are axially arranged in a row, and the mass and the volume are multiplied along with the axial row.
An integral multi-row high-pressure radial multi-plunger variable pump with the publication number of 'CN 109944759A', which belongs to the technical field of hydraulic pump equipment and comprises an eccentric shaft, a bearing, a pump body, a plunger sleeve, a fastening block, a fastening screw, a one-way valve and a pressure release valve. The eccentric wheel on the transmission shaft makes eccentric motion to drive the plunger piston to reciprocate so as to extrude the cavity space inside the plunger sleeve and extrude high-pressure oil, and the flow direction and the oil pressure of the oil are controlled by the check valve and the pressure release valve.
In the above patents: firstly, although two rows of plungers are arranged to increase the flow, the number of the plungers in a single row of the plunger pump is four (even number), the flow pulsation of the plunger pumps with the even number is large, and the stability of the pump is not strong; secondly, similarly, because the number of the plungers of the plunger pump is four, the side faces of the plunger pump for installing the plungers are at least four, and the side faces are all set to be a plane, so that the volume and the mass of the plunger pump are both larger; finally, because two rows of plungers are arranged in the radial direction of the pump body, the internal structure of the pump body is more complex, the process requirement is higher, the manufacturing cost is increased, and a great deal of inconvenience is brought to installation, use and maintenance.
Disclosure of Invention
In view of the above disadvantages in the prior art, the present invention provides a detachable double-row three-plunger pump, which is used to solve the problems of large volume, large mass, high manufacturing cost, and the like of the double-row plunger pump in the prior art.
The invention solves the technical problem and adopts the technical scheme that a detachable double-row three-plunger pump comprises:
the pump body that is the column setting, the pump body includes: the first body is detachably connected with the second body, and the axis of the first body is superposed with the axis of the second body;
the first body is provided with three first plungers along its circumference, and the second body is provided with three second plungers along its circumference.
Further, three first plungers are uniformly arranged in the circumferential direction of the first body, and three second plungers are uniformly arranged in the circumferential direction of the second body.
Further, the first body is a hexagonal prism, the side of the first body comprises three first plunger faces and three first pressure relief faces, and the three first plunger faces are staggered with the three first pressure relief faces one by one.
Furthermore, each first plunger surface is provided with a first mounting hole for mounting a first plunger along the radial direction of the first body.
Further, the second body is hexagonal prism setting, the side of second body includes three second plunger face and three second pressure release face, and is three the second plunger face is crisscross one by one with three the second pressure release face.
Furthermore, each second plunger surface is provided with a second mounting hole for mounting a second plunger along the radial direction of the second body.
Further, the first pressure relief surface is recessed towards the inner direction of the first body to form a first cambered surface; the second pressure relief surface is concave towards the inner direction of the second body to form a second cambered surface; the first cambered surface is connected with the second cambered surface.
Furthermore, one end of the first body is provided with a boss, one end of the second body is provided with a notch, and the boss can be embedded into the notch to limit radial movement between the first body and the second body.
Further, the boss is the ring form setting, just the boss with a plurality of bolt holes that are used for fixing are all seted up to the breach.
Furthermore, a gasket is arranged between the first body and the second body, a through hole is formed in the gasket, and the boss penetrates through the through hole and is embedded into the notch.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) and the double-row plunger is arranged, so that the displacement and the flow of the pump body are increased compared with a single-row plunger pump.
(2) The double-row plunger is arranged, so that the difference between the axial length and the radial length of the pump body is reduced, and the structure of the pump body is more regular and compact.
(3) Three plungers are arranged in each row, namely the number of the plungers in each row is odd, and compared with the plunger pump with the even number of the plungers, the plunger pump with the odd number of the plungers reduces flow pulsation and increases the stability of the plunger pump.
(4) The pressure release face has the inside sunken towards the pump body, compares in the pressure release face for planar setting, and sunken setting has reduced the volume of whole pump body, has also reduced the quality of whole pump body.
(5) The lug boss and the notch are arranged, so that the first body and the second body can be prevented from moving in the radial direction after being connected; meanwhile, the contact area between the first body and the second body can be increased, and the sealing performance between the first body and the second body is enhanced.
(6) The first body and the second body are detachably connected, and the first body and the second body can be respectively processed during processing, so that the processing and manufacturing difficulty is reduced; meanwhile, the installation and the maintenance are more convenient, any one of the first body and the second body breaks down, the first body and the second body can be detached and maintained, and the maintenance difficulty and cost are reduced.
Drawings
FIG. 1 is an exploded view of a plunger pump in an embodiment;
FIG. 2 is a schematic structural diagram of a first body in an embodiment;
FIG. 3 is a schematic structural diagram of a second body in the embodiment;
FIG. 4 is a schematic structural view of a gasket according to an embodiment;
in the figure:
100. a first body; 101. a first plunger; 110. a first plunger face; 111. a first mounting hole; 120. a first pressure relief surface; 130. a boss; 131. bolt holes;
200. a second body; 201. a second plunger; 210. a second plunger face; 211. a second mounting hole; 220. a second pressure relief surface; 230. a notch;
300. a gasket; 310. and a through hole.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1 to 4, the present invention discloses a detachable double-row three-plunger pump, which comprises:
the pump body that is the column setting, the pump body includes: the first body 100 and the second body 200 are detachably connected, and the axis of the first body 100 is coincident with the axis of the second body 200;
specifically, because the first body 100 and the second body 200 are detachably connected, the first body 100 and the second body 200 can be processed respectively during processing, thereby reducing the difficulty of processing and manufacturing; meanwhile, the installation and maintenance are more convenient, and when any one of the first body 100 and the second body 200 breaks down, the first body 100 and the second body 200 can be detached and maintained, so that the maintenance difficulty and cost are reduced.
The axis of the first body 100 coincides with the axis of the second body 200, so that the rotation of the rotating shaft at the axis is smoother after the first body 100 and the second body 200 are assembled.
The first body 100 is provided with three first plungers 101 along a circumferential direction thereof, and the second body 200 is provided with three second plungers 201 along a circumferential direction thereof.
Specifically, the pump body includes a first body 100 and a second body 200, three first plungers 101 are disposed in the circumferential direction of the first body 100, and three second plungers 201 are disposed in the circumferential direction of the second body 200, that is, the pump body is provided with two rows, and each row has three plungers distributed along the circumferential direction of the pump body, that is, a double-row three-plunger pump.
The advantages of such an arrangement are:
first, it increases the displacement and flow of the plunger pump compared to a single row plunger pump.
Secondly, because the plungers of the plunger pump are radially arranged along the pump body, if only one row of plungers is arranged, the great difference between the axial length and the radial length of the plunger pump can be caused, so that the structure of the plunger pump is irregular, and the waste of the redundant volume of the pump body is inevitably caused (the structure is not compact enough); therefore, this embodiment sets up double plunger, has reduced the difference between the axial length and the radial length of the pump body for pump body structure is more regular and compacter.
Thirdly, three plungers are arranged in each row, namely the number of the plungers in each row is odd, and compared with the plunger pump with the even number of the plungers, the plunger pump with the odd number of the plungers reduces flow pulsation and increases the stability of the plunger pump.
Further, three first plungers 101 are uniformly arranged in the circumferential direction of the first body 100, and three second plungers 201 are uniformly arranged in the circumferential direction of the second body 200.
The first plungers 101 and the second plungers 201 are uniformly arranged, so that included angles between any two adjacent first plungers 101 or two adjacent second plungers 201 are equal, vibration generated when each first plunger 101/second plunger 201 pumps oil is offset, and vibration is reduced; meanwhile, the structure is more regular.
Further, the first body 100 is disposed in a hexagonal prism shape, the side surface of the first body 100 includes three first plunger surfaces 110 and three first pressure relief surfaces 120, and the three first plunger surfaces 110 and the three first pressure relief surfaces 120 are staggered one by one.
Specifically, the first body 100 includes six side surfaces, specifically, three first plunger surfaces 110 and three first pressure relief surfaces 120, and the three first plunger surfaces 110 and the three first pressure relief surfaces 120 are staggered one by one. Wherein, the meaning of crisscross one by one is: two adjacent side surfaces of each first plunger surface 110 are first pressure relief surfaces 120, and two adjacent side surfaces of each first pressure relief surface 120 are first plunger surfaces 110.
Further, each first plunger surface 110 is opened with a first mounting hole 111 along the radial direction of the first body 100 for mounting the first plunger 101.
Further, the second body 200 is a hexagonal prism, the side surface of the second body 200 includes three second plunger surfaces 210 and three second pressure relief surfaces 220, and the three second plunger surfaces 210 and the three second pressure relief surfaces 220 are staggered one by one.
Specifically, the second body 200 includes six side surfaces, specifically, three second plunger surfaces 210 and three second pressure relief surfaces 220, and the three second plunger surfaces 210 and the three second pressure relief surfaces 220 are staggered one by one. Wherein, the meaning of crisscross one by one is: two adjacent side surfaces of each second plunger surface 210 are second pressure relief surfaces 220, and two adjacent side surfaces of each second pressure relief surface 220 are second plunger surfaces 210.
Further, each second plunger surface 210 is opened with a second mounting hole 211 for mounting the second plunger 201 along the radial direction of the second body 200.
Further, the first pressure relief surface 120 is recessed toward the inner direction of the first body 100 to form a first arc surface; the second pressure relief surface 220 is recessed toward the inner direction of the second body 200 to form a second arc surface; the first cambered surface is connected with the second cambered surface.
In the embodiment, the first pressure relief surface 120 has a first arc surface recessed toward the inside of the first body 100, that is, compared with the arrangement in which the first pressure relief surface 120 is a plane, the arrangement of the first arc surface reduces the volume of the first body 100, and reduces the mass of the first body 100. Similarly, the volume of the second body 200 is also reduced by the second arc surface formed on the second pressure relief surface 220 of the second body 200, and the mass of the second body 200 is reduced. The first cambered surface is connected with the second cambered surface, so that the side surface of the pump body is smoother.
Further, one end of the first body 100 is provided with a boss 130, one end of the second body 200 is provided with a notch 230, and the boss 130 can be inserted into the notch 230 for limiting the radial movement between the first body 100 and the second body 200.
Specifically, the bosses 130 and the notches 230 are provided to prevent radial movement of the first body 100 after the first body is coupled to the second body 200. When the protrusion 130 is inserted into the notch 230, the sidewall of the protrusion 130 abuts against the sidewall of the notch 230, thereby preventing the protrusion and the notch from moving radially. Preferably, the arrangement of the boss 130 and the notch 230 can increase the contact area between the first body 100 and the second body 200, thereby enhancing the sealing performance between the first body 100 and the second body 200.
Further, the boss 130 is disposed in a circular ring shape, and a plurality of bolt holes 131 for fixing are disposed on both the boss 130 and the notch 230. The first body 100 and the second body 200 are connected by bolts to prevent axial movement between the first body 100 and the second body 200.
Specifically, since the three first plungers 101/the three second plungers 201 are uniformly arranged in the circumferential direction of the first body 100/the second body 200, that is, the included angle between any two adjacent first plungers 101/the second plungers 201 is 120 °; meanwhile, as the boss 130 is arranged in a circular ring shape, when the first body 100 and the second body 200 are assembled, as long as the axes of the first body 100 and the second body 200 are overlapped, the boss 130 can be embedded into the notch 230, and then the first body 100 or the second body 200 is rotated to enable the side surfaces of the first body 100 and the second body 200 to be aligned and connected, so that the assembly is more convenient.
Further, a spacer 300 is disposed between the first body 100 and the second body 200, the spacer 300 is provided with a through hole 310, and the boss 130 passes through the through hole 310 and is embedded into the notch 230.
Since the plunger pump has a high requirement for sealing performance, in the embodiment, the gasket 300 is disposed between the first body 100 and the second body 200, so that the sealing performance between the first body 100 and the second body 200 can be enhanced.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (10)
1. A detachable double-row three-plunger pump is characterized by comprising:
the pump body that is the column setting, the pump body includes: the first body is detachably connected with the second body, and the axis of the first body is superposed with the axis of the second body;
the first body is provided with three first plungers along its circumference, and the second body is provided with three second plungers along its circumference.
2. The removable double row triple plunger pump according to claim 1, wherein three of the first plungers are uniformly arranged along a circumferential direction of the first body, and three of the second plungers are uniformly arranged along a circumferential direction of the second body.
3. The removable double row triple plunger pump according to claim 1, wherein the first body is in a hexagonal prism configuration, the side of the first body comprises three first plunger surfaces and three first pressure relief surfaces, and the three first plunger surfaces are staggered with the three first pressure relief surfaces.
4. The removable double row three plunger pump according to claim 3, wherein each of the first plunger surfaces defines a first mounting hole along a radial direction of the first body for mounting a first plunger.
5. The removable double row three plunger pump according to claim 3, wherein the second body is a hexagonal prism, the side of the second body comprises three second plunger surfaces and three second pressure relief surfaces, and the three second plunger surfaces are staggered with the three second pressure relief surfaces one by one.
6. The detachable double-row three-plunger pump according to claim 5, wherein each second plunger surface is provided with a second mounting hole for mounting a second plunger along a radial direction of the second body.
7. The removable double row triple plunger pump according to claim 5, wherein the first relief surface is recessed toward an inner direction of the first body to form a first cambered surface; the second pressure relief surface is concave towards the inner direction of the second body to form a second cambered surface; the first cambered surface is connected with the second cambered surface.
8. The removable double row triple plunger pump as claimed in claim 1, wherein the first body has a boss at one end thereof and the second body has a notch at one end thereof, the boss being insertable into the notch to restrict radial movement between the first body and the second body.
9. The detachable double-row three-plunger pump according to claim 8, wherein the boss is arranged in a circular ring shape, and a plurality of bolt holes for fixing are formed in the boss and the notch.
10. The removable double row three plunger pump according to claim 8, wherein a spacer is disposed between the first body and the second body, the spacer having a through hole, the boss passing through the through hole and fitting into the notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289391.3A CN113007050A (en) | 2021-03-18 | 2021-03-18 | Detachable double-row three-plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289391.3A CN113007050A (en) | 2021-03-18 | 2021-03-18 | Detachable double-row three-plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113007050A true CN113007050A (en) | 2021-06-22 |
Family
ID=76409529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110289391.3A Pending CN113007050A (en) | 2021-03-18 | 2021-03-18 | Detachable double-row three-plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113007050A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939311A (en) * | 2014-04-15 | 2014-07-23 | 西安交通大学 | Hydraulic return travel radial plunger pump adopting double-column slide valves for oil distribution |
| CN104696213A (en) * | 2015-03-02 | 2015-06-10 | 三一重型能源装备有限公司 | Fracturing pump system and fracturing truck |
| US20170204852A1 (en) * | 2016-01-15 | 2017-07-20 | W.H. Barnett, JR. | Segmented fluid end |
| CN109488548A (en) * | 2018-11-21 | 2019-03-19 | 浙江欧盾国际救援装备有限公司 | The radial multi-plunger oil pumping device of big flow |
| CN209671190U (en) * | 2019-03-13 | 2019-11-22 | 浙江赛克思液压有限公司 | The split type drive mechanism of double-pump type hydraulic pump |
| CN110552855A (en) * | 2019-08-05 | 2019-12-10 | 浙江工业大学 | multilayer radial large-flow high-pressure multi-plunger oil pump device |
| CN210033744U (en) * | 2019-03-08 | 2020-02-07 | 深圳市润盈科技有限公司 | Detachable quantitative plunger pump |
| CN111075677A (en) * | 2019-12-30 | 2020-04-28 | 北京天地玛珂电液控制系统有限公司 | Radial plunger pump |
| CN212508685U (en) * | 2020-04-30 | 2021-02-09 | 神华神东煤炭集团有限责任公司 | Modular large flow pump |
-
2021
- 2021-03-18 CN CN202110289391.3A patent/CN113007050A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939311A (en) * | 2014-04-15 | 2014-07-23 | 西安交通大学 | Hydraulic return travel radial plunger pump adopting double-column slide valves for oil distribution |
| CN104696213A (en) * | 2015-03-02 | 2015-06-10 | 三一重型能源装备有限公司 | Fracturing pump system and fracturing truck |
| US20170204852A1 (en) * | 2016-01-15 | 2017-07-20 | W.H. Barnett, JR. | Segmented fluid end |
| CN109488548A (en) * | 2018-11-21 | 2019-03-19 | 浙江欧盾国际救援装备有限公司 | The radial multi-plunger oil pumping device of big flow |
| CN210033744U (en) * | 2019-03-08 | 2020-02-07 | 深圳市润盈科技有限公司 | Detachable quantitative plunger pump |
| CN209671190U (en) * | 2019-03-13 | 2019-11-22 | 浙江赛克思液压有限公司 | The split type drive mechanism of double-pump type hydraulic pump |
| CN110552855A (en) * | 2019-08-05 | 2019-12-10 | 浙江工业大学 | multilayer radial large-flow high-pressure multi-plunger oil pump device |
| CN111075677A (en) * | 2019-12-30 | 2020-04-28 | 北京天地玛珂电液控制系统有限公司 | Radial plunger pump |
| CN212508685U (en) * | 2020-04-30 | 2021-02-09 | 神华神东煤炭集团有限责任公司 | Modular large flow pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9188123B2 (en) | Pump assembly | |
| US20120063936A1 (en) | Modular fluid end for a multiplex plunger pump | |
| US6030184A (en) | Housing construction for reciprocating piston type compressor | |
| CN113007050A (en) | Detachable double-row three-plunger pump | |
| CN109611324B (en) | Diaphragm alarm sealing structure of diaphragm pump | |
| US4778350A (en) | Hydraulic pump assemblies | |
| CN208221099U (en) | Compressor | |
| US5782613A (en) | Piston type compressor with structure for reducing cylinder bore deformation | |
| CN211116443U (en) | Radial plunger pump convenient to maintain | |
| US20140109761A1 (en) | Axial pump having stress reduced port plate | |
| US20240151225A1 (en) | Zeroing device | |
| CN210317872U (en) | Rigid coupling for centrifugal pump and centrifugal pump | |
| CN109488571B (en) | Cylinder head assembly and compressor | |
| CN214698281U (en) | Pressure cap and plunger pump hydraulic end | |
| CN109944759A (en) | An integrated multi-row high-pressure radial multi-piston variable pump | |
| CN109488548A (en) | The radial multi-plunger oil pumping device of big flow | |
| CN110469477B (en) | High-speed bidirectional plunger pump with axial oil port | |
| CN215213789U (en) | Plunger transmission disc for swash plate variable high-pressure plunger pump | |
| CN220081739U (en) | Impeller shaft assembly component and fire pump | |
| CN215633680U (en) | Servo valve structure | |
| CN216618100U (en) | Piston connecting structure of hydraulic cylinder and hydraulic cylinder | |
| CN108547748A (en) | A kind of low-noise axial plunger pump | |
| KR20030010453A (en) | Positive displacement pump having a pair of pumping chambers and method of assembling thereof | |
| CN221074572U (en) | Double-pump-head type diaphragm pump with small pulsation | |
| CN219828056U (en) | Connection structure and hydraulic nut feed liquor pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210622 |
|
| RJ01 | Rejection of invention patent application after publication |