Vertical plunger pump

Abstract

The utility model relates to the field of fluid machinery, in particular to a vertical plunger pump. The crankcase is provided with a piston cavity; an oil storage space for storing lubricating oil is formed in the crankcase; the piston cavity is located above the oil storage space. The plunger assembly comprises a piston and a plunger fixed to the piston. The piston is arranged in the piston cavity and can move in the piston cavity in a reciprocating mode to drive the plunger to move in a reciprocating mode to achieve water pumping of the plunger pump. One end of the connecting rod is rotationally connected to the eccentric part, and the other end is hinged to the piston; the oil supply unit comprises an oil pump and a first oil duct arranged in the crankcase and communicated with the piston cavity; the oil inlet end of the oil pump is communicated with the oil storage space; the oil outlet end of the oil pump is communicated with the first oil duct; an oil return channel communicated with the oil storage space and the piston cavity is arranged between the piston and the piston cavity; compared with a horizontal plunger pump, the horizontal plunger pump is smaller in occupied space in the horizontal direction (or in the transverse direction), and the horizontal plunger pump can be used in some environments with narrow transverse space.

Description

Technical Field

[0001] The present application relates to the field of fluid machinery, and in particular to a vertical plunger pump. Background Art

[0002] As a commonly used pump, the plunger pump is widely used. It mainly uses a motor to drive the plunger to move back and forth linearly to achieve the pumping action. Generally, in order to lubricate and dissipate heat for the piston of the plunger pump, lubricating oil is usually added to the crankcase for lubrication and heat dissipation.

[0003] Currently, most plunger pumps are horizontal plunger pumps. For horizontal plunger pumps, the center of the piston and the center of the crankshaft are roughly at the same height, and the lubricating oil level in the crankcase is also roughly near the height of the two. The crankshaft and the gears on the crankshaft rotate to splash the lubricating oil in the crankcase onto the piston to achieve piston lubrication.

[0004] Compared with horizontal piston pumps, vertical piston pumps take up less space in the horizontal direction, making them better suited for environments with limited space in the horizontal direction.

[0005] However, this lubrication method is difficult to apply well to vertical plunger pumps. For vertical plunger pumps, the height of the piston is higher than the crankshaft. Therefore, it is difficult to disperse the lubricating oil to a large extent by relying solely on the crankshaft and the gears on the crankshaft. Therefore, there is room for improvement. Utility Model Content

[0006] In order to solve at least one technical problem mentioned in the background technology, the purpose of this application is to provide a vertical plunger pump.

[0007] To achieve the above objectives, this application provides the following technical solutions:

[0008] A vertical plunger pump, comprising:

[0009] Crankcase; the crankcase is provided with a piston cavity; an oil storage space for storing lubricating oil is formed inside the crankcase; vertically, the piston cavity is located above the oil storage space;

[0010] The plunger assembly includes a piston and a plunger fixed to the piston; the piston is arranged in the piston cavity and can reciprocate in the piston cavity to drive the plunger to reciprocate to realize the water pumping of the plunger pump.

[0011] a crankshaft rotatably connected to the crankcase and driven to rotate by a drive assembly, the crankshaft including an eccentric portion;

[0012] a connecting rod, one end of which is rotatably connected to the eccentric portion and the other end of which is hinged to the piston;

[0013] The oil supply unit includes an oil pump and a first oil passage connected to the crankcase and the piston chamber; the oil inlet end of the oil pump is connected to the oil storage space; the oil outlet end of the oil pump is connected to the first oil passage; and an oil return passage connecting the oil storage space and the piston chamber is provided between the piston and the piston chamber.

[0014] As an optional embodiment of the present application, the oil supply unit further includes an oil filter; the oil filter is arranged between the oil pump and the oil storage space, and the oil in the oil storage space enters the oil pump after being filtered by the oil filter.

[0015] As an optional embodiment of the present application, a second oil passage is provided in the crankshaft; an oil outlet hole connected to the oil passage is provided at the eccentric portion; and the oil outlet end of the oil pump is connected to the second oil passage.

[0016] As an optional embodiment of the present application, an oil return groove extending along the axial direction of the piston is provided on the outer peripheral wall of the piston, and the oil return groove and the inner peripheral wall of the piston cavity together form the oil return channel.

[0017] As an optional embodiment of the present application, an oil collecting groove surrounding the piston is provided on the outer peripheral wall of the piston.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] In this application, the piston chamber is arranged above the oil storage chamber, so that the entire plunger pump is distributed vertically. Compared with the traditional horizontal plunger pump, it occupies less space in the horizontal direction (or lateral direction), which is conducive to use in some environments with narrow lateral space.

[0020] In addition, in this solution, an oil supply unit is provided, and the oil pump provides power to actively supply oil, rather than simply relying on splashing to supply oil. In this way, the lubricating oil in the oil storage space can be pumped into the piston cavity by the oil pump to achieve lubrication and heat dissipation of the piston; then, the lubricating oil in the piston cavity will flow back into the oil storage space through the return oil channel, thus forming a circulating lubricating oil supply system.

[0021] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0023] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0024] Figure 1 Shows a schematic diagram of the structure of this application;

[0025] Figure 2 Shown Figure 1 Cross-section view from the middle AA perspective;

[0026] Figure 3 Shown Figure 2 A partial enlarged view of the middle M part;

[0027] Figure 4 Shows a schematic structural diagram of the crankshaft of the present application;

[0028] Figure 5 Shown is a system block diagram of the oil supply unit of the present application.

[0029] Description of the numbers in the figure:

[0030] 1. Crankcase; 10. Oil storage space; 11. Piston chamber; 12. First oil channel;

[0031] 2. Plunger assembly; 21. Piston; 211. Oil return groove; 212. Oil collecting groove; 22. Plunger; 23. Oil return channel;

[0032] 3. Connecting rod;

[0033] 4. Crankshaft; 41. Eccentric portion; 42. Second oil passage; 43. Oil outlet hole;

[0034] 5. Oil supply unit; 51. Oil pump; 52. Oil filter;

[0035] 6. Pump head. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0037] Combine Figure 1-5 As shown, this embodiment mainly provides a vertical plunger pump, including a pump head 6, a crankcase 1, a plunger assembly 2, a crankshaft 4, a connecting rod 3, an oil supply unit 5, etc.; the pump head 6 is provided with components such as a water inlet and a water outlet.

[0038] like Figure 2As shown, the plunger assembly 2 mainly includes a piston 21 and a plunger 22 fixed to the piston 21, and the ends of the two are connected and fixed to each other and are basically coaxially arranged.

[0039] like Figure 3 As shown, the crankcase 1 is provided with a piston chamber 11, which is arranged vertically; the vertical direction claimed in this embodiment can also be understood as the height direction of the entire plunger 22 pump; wherein, the piston 21 is provided in the piston chamber 11, and can reciprocate vertically in the piston chamber 11, thereby making the plunger 22 move axially and reciprocatingly synchronously with the piston 21, and the water pumping action is realized with the axial reciprocating action of the plunger 22, that is, with the axial reciprocating action of the plunger 22, the water inlet of the pump head 6 absorbs water and the water outlet discharges water.

[0040] like Figure 2 As shown, an oil storage space 10 for storing lubricating oil is formed inside the crankcase 1 . In some embodiments, the oil storage space 10 is formed at the inner lower portion of the crankcase 1 .

[0041] The crankshaft 4 is connected to the crankcase 1 and rotates around the first axis, and is driven to rotate by a drive assembly. The drive assembly here mainly includes a motor, and the motor and the crankshaft 4 are driven by gears or belts. In some embodiments, the first axis is arranged horizontally.

[0042] Combine Figure 4 As shown, the crankshaft 4 at least partially constitutes an eccentric portion 41 . The eccentric portion 41 is in a circular wheel-shaped structure. The center axis of the eccentric portion 41 is parallel to the first axis and deviates from the first axis.

[0043] It is understandable that a plurality of eccentric portions 41 may be formed on the crankshaft 4 according to actual needs, and each eccentric portion 41 corresponds to a connecting rod 3 and a plunger assembly 2, thereby forming a plunger 22 pump with multiple plungers 22 acting thereon.

[0044] In addition, if Figure 2 As shown, in the vertical direction, the piston chamber 11 is above the oil storage space 10, so that the piston 21 and the plunger 22 are arranged above the crankshaft 4, so that the plunger 22 pump is distributed vertically as a whole, forming a vertical plunger pump structure. Compared with the traditional horizontal plunger pump, the vertical plunger pump occupies less space in the horizontal direction (or lateral direction), which is conducive to use in some environments with narrow lateral space.

[0045] Combine Figure 2 and Figure 4As shown, the connecting rod 3 is mainly used to realize the linkage between the eccentric part 41 and the piston 21. Specifically, one end of the connecting rod 3 is hinged to the lower end of the piston 21, and the other end is sleeved on the eccentric part 41 and is rotatably connected to the eccentric part 41, so that a crankshaft-connecting rod mechanism is formed between the crankshaft 4 and the connecting rod 3; in this way, the crankshaft 4 rotates, thereby driving the eccentric part 41 to rotate, and the eccentric part 41 rotates, driving the connecting rod 3 to move, thereby pushing the piston 21 to axially reciprocate through the connecting rod 3.

[0046] Combine Figure 1 As shown, the oil supply unit 5 is mainly used to provide lubricating oil for the axial reciprocating motion of the piston 21. Specifically, the oil supply unit 5 includes an oil pump 51 and a first oil channel 12 provided on the crankcase 1 and connected to the piston chamber 11.

[0047] The oil inlet end of the oil pump 51 is connected to the oil storage space 10 and is used to extract the lubricating oil in the oil storage space 10; the oil outlet end of the oil pump 51 is connected to the first oil channel 12, so that the lubricating oil extracted by the oil pump 51 enters the first oil channel 12, and then enters the piston chamber 11 from the first oil channel 12 to lubricate and dissipate heat for the piston 21.

[0048] In addition, if Figure 3 As shown, a return oil channel 23 connecting the oil storage space 10 and the piston chamber 11 is provided between the piston 21 and the piston chamber 11, so that the lubricating oil in the piston chamber 11 flows back into the oil storage space 10 through the return oil channel 23 for circulation. In this way, the entire oil supply unit 5 is equivalent to a lubricating oil circulation system, which continuously supplies oil to the piston chamber 11.

[0049] In some embodiments, such as Figure 4 As shown, the oil return channel 23 is specifically formed as follows: an oil return groove 211 extending axially along the piston 21 is provided on the outer peripheral wall of the piston 21 , and the oil return groove 211 and the inner peripheral wall of the piston cavity 11 together form the oil return channel 23 .

[0050] The oil return groove 211 may be one or more oil return grooves 211 , and the multiple oil return grooves 211 are evenly distributed along the circumference of the piston 21 .

[0051] In addition, in order to allow the lubricating oil splashed by the crankshaft 4 during rotation to be brought into the space between the peripheral wall of the piston cavity 11 and the piston 21 for lubrication, in some embodiments, such as Figure 4 As shown, an oil collecting groove 212 surrounding the piston 21 is provided on the outer peripheral wall of the piston 21, that is, the oil collecting groove 212 is annular and surrounds the outer peripheral wall of the piston 21; the splashed lubricating oil can splash into the oil collecting groove 212 and be brought into the piston cavity 11 by the piston 21 to assist lubrication.

[0052] It is understandable that, in some embodiments, there may be multiple oil collecting grooves 212 , and the multiple oil collecting grooves 212 are distributed in sequence along the axial direction of the piston 21 .

[0053] In addition, in some embodiments, in order to reduce impurities in the lubricating oil and improve the quality of the lubricating oil, such as Figure 1 As shown, the oil supply unit 5 also includes an oil filter 52, which is mainly used to filter the lubricating oil. Specifically, the oil filter 52 is arranged between the oil pump 51 and the oil storage space 10. The oil in the oil storage space 10 enters the oil pump 51 after being filtered by the oil filter 52.

[0054] In addition, in order to lubricate the rotational connection between the eccentric portion 41 and the connecting rod 3, in some embodiments, as shown in FIG. Figure 2 As shown, the crankshaft 4 is provided with a second oil passage 42 extending axially along the crankshaft 4. The eccentric portion 41 is provided with an oil outlet hole 43 connected to the oil passage. Specifically, one end of the oil outlet hole 43 is connected to the second oil passage 42, and the other end extends through the outer peripheral wall of the eccentric portion 41. The oil outlet end of the oil pump 51 is connected to the second oil passage 42. The lubricating oil pumped by the second oil pump 51 is thus divided into two paths: one path is supplied to the piston chamber 11, and the other path is supplied to the second oil passage 42. The oil then flows out of the oil outlet hole 43 and into the rotational connection between the eccentric portion 41 and the connecting rod 3 to lubricate both.

[0055] As a specific embodiment, the oil pump 51 and the oil filter 52 are both installed on the crankcase 1. Specifically:

[0056] Combine Figure 1 and Figure 5 As shown, an oil outlet a1 connected to the oil storage space 10 is provided at the lower position of the crankcase 1; the oil inlet end a2 of the oil filter 52 is connected to the oil outlet a1; the oil inlet end a4 of the oil pump 51 is connected to the oil outlet end a3 of the oil filter 52; the oil pump 51 has two oil outlet ends a5 / a6, one of the oil outlet ends a5 of the oil pump 51 is connected to the first oil channel 12, and the other oil outlet end a6 is connected to the oil inlet end a7 of the second oil channel 42. It can be understood that since the crankshaft 4 needs to rotate, the oil inlet end a7 of the second oil channel 42 can adopt a rotary joint, which can rotate relative to the crankshaft 4.

[0057] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not a limitation herein.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0059] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. Vertical plunger pump, characterized in that, include: crankcase; The crankcase is provided with a piston cavity; an oil storage space for storing lubricating oil is formed inside the crankcase; vertically, the piston cavity is located above the oil storage space; The plunger assembly includes a piston and a plunger fixed to the piston; the piston is arranged in the piston cavity and can reciprocate in the piston cavity to drive the plunger to reciprocate to realize the water pumping of the plunger pump. a crankshaft rotatably connected to the crankcase and driven to rotate by a drive assembly, the crankshaft including an eccentric portion; a connecting rod, one end of which is rotatably connected to the eccentric portion and the other end of which is hinged to the piston; The oil supply unit includes an oil pump and a first oil passage connected to the crankcase and the piston chamber; the oil inlet end of the oil pump is connected to the oil storage space; the oil outlet end of the oil pump is connected to the first oil passage; and an oil return passage connecting the oil storage space and the piston chamber is provided between the piston and the piston chamber.

2. The vertical plunger pump according to claim 1, characterized in that: The oil supply unit further includes an oil filter; the oil filter is arranged between the oil pump and the oil storage space, and the oil in the oil storage space enters the oil pump after being filtered by the oil filter.

3. The vertical plunger pump according to claim 1 or 2, characterized in that: A second oil passage is provided in the crankshaft; an oil outlet hole communicating with the oil passage is provided at the eccentric portion; and an oil outlet end of the oil pump is communicated with the second oil passage.

4. The vertical plunger pump according to claim 1, characterized in that An oil return groove extending along the axial direction of the piston is provided on the outer peripheral wall of the piston, and the oil return groove and the inner peripheral wall of the piston cavity are combined to form the oil return channel.

5. The vertical plunger pump according to claim 1, characterized in that: An oil collecting groove surrounding the piston is provided on the outer peripheral wall of the piston.

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