WO2024008137A1

WO2024008137A1 - Pump device and plunger pump

Info

Publication number: WO2024008137A1
Application number: PCT/CN2023/106031
Authority: WO
Inventors: 傅珂珂; 李进
Original assignee: 浙江千机智能科技有限公司
Priority date: 2022-07-06
Filing date: 2023-07-06
Publication date: 2024-01-11
Also published as: CN115095516A

Abstract

A pump device and a plunger pump. The plunger pump comprises a reciprocating assembly (100) and a pump assembly (200); the reciprocating assembly (100) comprises a power source (110), a power shaft (120), and a reciprocating member (130); and the pump assembly (200) comprises a pump body (210) and a plunger (220). The pump body (210) is provided with a volumetric cavity (211) and a mounting cavity (214); during assembly, the plunger (220) is connected to the reciprocating member (130), the reciprocating member (130) cooperates with the power shaft (120), and the plunger (220) passes through the volumetric cavity (211) from one side of the mounting cavity (214), such that the reciprocating member (130) and the power shaft (120) are assembled in the mounting cavity (214). The power source (110) drives the power shaft (120) to drive the reciprocating member (130) to reciprocate in the axial direction, which drives the plunger (220) to reciprocate, and fluid is drawn into the volumetric cavity from a first channel (212) and is discharged from a second channel (213). In the present plunger pump, the reciprocating member and the power shaft are both arranged in the pump body, components and assembling steps are simplified, and miniaturization of the plunger pump is facilitated.

Description

Pump equipment and plunger pumps

Technical field

The present invention relates to the technical field of pump structures, and in particular to pump equipment and plunger pumps.

Background technique

A pump is a machine that transports fluid or pressurizes fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid. The pump is mainly used to transport liquids such as water, oil, acid and alkali liquids, emulsions, suspoemulsions and liquid metals. It can also transport liquid, gas mixtures and liquids containing suspended solids. However, the structure of traditional pumps is complex and the assembly process is complicated, which is not conducive to miniaturization.

Contents of the invention

Based on this, it is necessary to solve the above problems and provide a pumping equipment and plunger pump that facilitates simplified assembly steps and is conducive to miniaturization.

A plunger pump. The plunger pump includes a reciprocating component and a pump component. The reciprocating component includes a power source, a power shaft and a reciprocating part. The reciprocating part is transmission-cooperated with the power shaft so that the power shaft The reciprocating part can be driven to move back and forth along the axis direction of the power shaft; the pump assembly includes a pump body and a plunger, a volume chamber is formed in the pump body, and the outer wall of the pump body is formed with the A first channel and a second channel are connected to the volume chamber. An installation cavity connected to the volume chamber is also formed in the pump body. The plunger is connected to the reciprocating part, and the plunger passes through the volume. In the cavity, the power shaft and the reciprocating part are located in the installation cavity, and the power source is used to drive the power shaft to rotate to drive the plunger in the volume cavity through the reciprocating part. The fluid moves reciprocally in the first channel so that the fluid can be sucked into the volume chamber from the first channel and discharged from the second channel.

In one embodiment, a guide structure is provided in the installation cavity, the reciprocating part is arranged in the radial direction of the power shaft, the reciprocating part guides and cooperates with the guide structure, and the guide structure The guiding direction is consistent with the axis direction of the power shaft.

In one embodiment, a guide groove is formed on the outer wall of the reciprocating part, the guide structure is a guide rod, the length direction of the guide rod is the axial direction of the power shaft, and the guide rod passes through In the guide groove, and able to slide in the guide groove; or

The guide structure is a guide groove formed on the inner wall of the installation cavity. The length direction of the guide groove is the axis direction of the power shaft. The outer wall of the reciprocating part is formed with a guide protrusion. The guide protrusion is formed on the inner wall of the installation cavity. The protrusion passes through the guide groove and can slide in the guide groove.

In one embodiment, the power shaft is provided with a reciprocating guide rail, the reciprocating guide rail is a closed curved guide rail surrounding the axis of the power shaft, and the wave peaks and troughs of the curved guide rail are along the direction of the power shaft. The axes are arranged at intervals; the reciprocating part includes a moving body and a reciprocating body, the reciprocating body is sleeved on the power shaft, the moving body is located between the reciprocating body and the power shaft, and the moving body The guide is provided on the reciprocating guide rail and is limited to the reciprocating body. The movable body can move on the reciprocating guide rail. The plunger is connected to the reciprocating body.

In one embodiment, the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curved groove surrounding the axis of the power shaft, and the moving body is penetrated in the reciprocating groove and can move in the reciprocating groove. Move in the groove; an oil guide groove is provided on the inner wall of the reciprocating groove, the moving body is a sphere, and the moving body can roll in the reciprocating groove.

In one embodiment, the oil guide groove is a closed curved groove surrounding the axis of the power shaft.

In one of the embodiments, the reciprocating part further includes a matching sleeve. The matching sleeve is sleeved on the moving body and installed on the reciprocating body. There is a gap between the moving body and the inner wall of the matching sleeve. There are a plurality of rolling balls, and the moving body can roll relative to the matching sleeve.

In one embodiment, the power shaft is also provided with a balance guide rail that is spaced opposite to the reciprocating guide rail along the axis of the power shaft, and the balance guide rail is a closed curved guide rail surrounding the axis of the power shaft, And the wave crests and wave troughs of the balance guide rail are spaced apart along the axis of the power shaft; and the wave crests of the balance guide rail are opposite to the wave troughs of the reciprocating guide rail along the axial direction, and the wave troughs of the balance guide rail are opposite to the wave troughs of the balance guide rail along the axial direction. The wave crests of the reciprocating guide rail are opposite to each other; a balance body is provided on the balance guide rail, and the balance body and the moving body are arranged oppositely along the axis of the power shaft. When the power shaft rotates, the balance body and the Moving bodies move toward or away from each other.

In one embodiment, the pump body includes a pump body and a back cover. One end of the pump body is formed with a volume chamber, the first channel and the second channel. The other end of the pump body is formed with a volume chamber. In the installation cavity, the back cover is installed on the other end of the pump body, and a rotation hole is provided on the back cover. One end of the power shaft is connected with a connecting rod, and the connecting rod is passed through The rotation hole is connected to the power source, and a rolling bearing is provided between the connecting rod and the inner wall of the rotation hole; a rolling bearing is provided between the inner wall of the back cover facing the installation cavity and the power shaft. Plane bearings.

In one embodiment, a guide sleeve and a sealing sleeve are provided on the inner wall of the volume chamber, and the sealing sleeve is located on a side of the guide sleeve facing away from the reciprocating member, and the plunger faces away from the reciprocating member. The front end of the reciprocating member passes through the guide sleeve and the sealing sleeve, and the front end of the plunger does not pass through the sealing sleeve during the reciprocating stroke.

A pumping device includes the plunger pump as described above.

The above-mentioned pump equipment and plunger pump have a volume cavity and an installation cavity formed in the pump body. During assembly, the plunger is connected to the reciprocating part of the reciprocating component, and the reciprocating part is driven and matched with the power shaft to move the plunger Assembling can be achieved by inserting one side of the installation cavity into the volume cavity so that the reciprocating part and the power shaft are located in the installation cavity. The power source drives the power shaft to drive the reciprocating part to reciprocate along the axis of the power shaft to drive the plunger to reciprocate in the volume chamber, so that the fluid can be sucked into the volume chamber from the first channel and flow from the third channel to the volume chamber. Two channel discharge purpose. By arranging the reciprocating parts and the power shaft in the pump body, the above-mentioned plunger pump not only simplifies the components and assembly steps, but also facilitates the miniaturization design of the plunger pump.

Description of the drawings

The drawings forming a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements in the drawings are drawn by way of example only and not necessarily to true scale. In the attached picture:

Figure 1 is a schematic structural diagram of a plunger pump in an embodiment;

Figure 2 is a cross-sectional view of the plunger pump shown in Figure 1;

Figure 3 is a partially exploded view of the plunger pump shown in Figure 2;

Figure 4 is a partial cross-sectional view of the pump body in Figure 3;

Figure 5 is an exploded schematic diagram of the back cover and installation cover in Figure 3;

Figure 6 is an exploded schematic diagram of the plunger pump shown in Figure 2, omitting the pump body and end cover;

FIG. 7 is a cross-sectional view of the matching sleeve in FIG. 6 .

Explanation of reference symbols:

10. Piston pump; 100. Reciprocating component; 110. Power source; 120. Power shaft; 122. Connecting rod; 124. Reciprocating groove; 126. Oil guide groove; 130. Reciprocating parts; 131. Guide groove; 132. Movement Body; 133, reciprocating body; 134, matching sleeve; 135, ball; 136, reciprocating hole; 137, mounting hole; 138, mounting plate; 140. Reduction gear set; 200. Pump assembly; 210. Pump body; 211. Volume chamber; 212. First channel; 213. Second channel; 214. Installation cavity; 215. Guide sleeve; 216. Sealing sleeve; 217. Limit sleeve; 218, first joint; 219, second joint; 220, plunger; 230, pump body; 240, end cover; 241, first connection groove; 242, second connection groove; 250, back cover; 252. Rotation hole; 260. Rolling bearing; 270. Plane bearing; 280. Installation cover; 290. Guide rod.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

Referring to FIGS. 1 and 2 , the plunger pump 10 in one embodiment of the present invention can at least achieve the purpose of improving assembly efficiency and is conducive to miniaturization design. Specifically, the plunger pump 10 includes a reciprocating assembly 100 and a pump assembly 200. The reciprocating assembly 100 includes a power source 110, a power shaft 120 and a reciprocating part 130. The reciprocating part 130 is in transmission cooperation with the power shaft 120, so that the power shaft 120 can drive the reciprocating part. The component 130 moves reciprocally along the axis direction of the power shaft 120; the pump assembly 200 includes a pump body 210 and a plunger 220. A volume chamber 211 is formed in the pump body 210, and a third cavity connected to the volume chamber 211 is formed on the outer wall of the pump body 210. A channel 212 and a second channel 213, the pump body 210 is also formed with an installation cavity 214 connected to the volume chamber 211, the plunger 220 is connected to the reciprocating member 130, and the plunger 220 is penetrated in the volume cavity 211, so that The power shaft 120 and the reciprocating part 130 are located in the installation cavity 214. The power source 110 is used to drive the power shaft 120 to rotate, so as to drive the plunger 220 to reciprocate in the volume chamber 211 through the reciprocating part 130, so that the fluid can flow from the first channel 212 It is sucked into the volume chamber 211 and discharged from the second channel 213 .

Since the volume chamber 211 and the installation cavity 214 are formed in the pump body 210, during assembly, the plunger 220 is connected to the reciprocating part 130, and the reciprocating part 130 is driven and matched with the power shaft 120, and the plunger 220 is moved from the installation cavity 214. One side is inserted into the volume cavity 211, so that the reciprocating part 130 and the power shaft 120 are located in the installation cavity 214, and assembly can be realized. The power source 110 drives the power shaft 120 to drive the reciprocating member 130 to reciprocate along the axis direction of the power shaft 120 to drive the plunger 220 to reciprocate in the volume chamber 211, so that the fluid can be sucked into the volume chamber 211 from the first channel 212, and flow from the first channel 212 to the volume chamber 211. The second channel 213 discharges the destination. The above-mentioned plunger pump 10 disposes the reciprocating member 130 and the power shaft 120 in the pump body 210, which not only simplifies the components and assembly steps, but also facilitates the miniaturization design of the plunger pump 10.

In one embodiment, one-way valves are provided in both the first channel 212 and the second channel 213 to ensure one-way water inlet and outlet of the first channel 212 and the second channel 213 and to ensure stable flow of fluid.

In one embodiment, a guide sleeve 215 is provided on the inner wall of the volume chamber 211 . The plunger 220 is inserted into the guide sleeve 215 and can move back and forth in the guide sleeve 215 . The use of the guide sleeve 215 can avoid direct friction between the plunger 220 and the inner wall of the volume chamber 211, thereby ensuring the service life of the pump body 210.

Specifically, a sealing sleeve 216 is also provided on the inner wall of the volume chamber 211, and the sealing sleeve 216 is located on the side of the guide sleeve 215 facing away from the reciprocating member 130, and the plunger 220 passes through the guide sleeve 215 facing away from the front end of the reciprocating member 130. And can further pass through the sealing sleeve 216, and the front end of the plunger 220 will not pass through the sealing sleeve 216 during the reciprocating stroke. The use of the sealing sleeve 216 can ensure that during the process of pumping the fluid, the fluid will not pass through the space between the plunger 220 and the inner wall of the volume chamber 211, thereby ensuring the sealing property of the fluid during the process of pumping.

In another embodiment, a sealing ring is provided between the guide sleeve 215 and the plunger 220 . Use sealing rings to further ensure tightness.

In another embodiment, a limiting sleeve 217 is formed on the side of the sealing sleeve 216 facing away from the guide sleeve 215. The limiting sleeve 217 is fixed on the inner wall of the volume chamber 211. The limiting sleeve 217 is used to limit the sealing sleeve 216. position to prevent the sealing sleeve 216 from following the plunger 220 from reciprocating and affecting the sealing performance. In other embodiments, The limiting sleeve 217 can also be a limiting protrusion formed on the inner wall of the volume chamber 211 .

In one embodiment, the plunger 220 includes a connecting rod and a piston body. The piston body is connected to the reciprocating member 130 through the connecting rod. The piston body is located in the volume chamber 211 and can be moved therein. The volume chamber 211 moves back and forth, and the piston body divides the volume chamber 211 into two compression spaces; there are two first channels 212 and two second channels 213, and the two first channels 213 The passages 212 are respectively connected with the two compression spaces, and the two second passages 213 are respectively connected with the two compression spaces.

When the connecting rod drives the piston body to move back and forth, it can cyclically change the size of the two compression spaces. If the piston body moves toward a compression space and compresses, the fluid in the compression space can be pumped out through the second channel 213 connected to the compression space. The volume of another compression space increases, causing fluid to be pumped into the compression space through the first channel 212 connected to the compression space, and the piston body further moves to compress the compression space, causing the fluid to flow through the second channel 212 connected to the compression space. 213 is pumped out and circulates like this to achieve the effect of a double-action pump.

In another embodiment, the plunger 220 is disposed in the volume chamber 211, and a compression space is formed only on the side of the plunger 220 facing away from the reciprocating member 130. There is only one compression space, the first channel 212 and the second channel. 213 is connected with the compression space to achieve the effect of a single-action pump.

Referring to FIGS. 2 to 4 , in one embodiment, the pump body 210 includes a pump body 230 and an end cover 240 . A volume chamber 211 , a first channel 212 and a second channel 213 are formed at one end of the pump body 210 . An installation cavity 214 is formed at one end, and an end cover 240 is provided on one end of the pump body 210. The end cover 240 faces upward and has a first connection groove 241 and a second connection groove 242 on one side of the pump body 230, through which the first passage 212 passes. The first connecting groove 241 communicates with the volume chamber 211, and the second channel 213 communicates with the volume chamber 211 through the second connecting groove 242. By arranging the pump body 230 and the end cover 240, the communication between the first channel 212 and the second channel 213 and the volume chamber 211 is facilitated.

Specifically, the first channel 212 and the second channel 213 are respectively located on opposite sides of the volume chamber 211 . Further, a first joint 218 is provided at the first channel 212, a second joint 219 is provided at the second channel 213, and the first joint 218 and the second joint 219 are respectively located on opposite sides of the pump body 210. Only increasing the size of the plunger pump 10 in one direction is beneficial to the installation of the plunger pump 10 during use. In other embodiments, the first connector 218 and the second connector 219 can also be disposed at other positions of the pump body 210 according to usage conditions.

In another embodiment, one end of the pump body 230 is formed with a volume chamber 211, and the other end is formed with an installation chamber 214. The end cap 240 is covered on one end of the pump body 230, and the end cap 240 faces up one side of the pump body 230. A connecting groove is provided, in which one of the first channel 212 and the second channel 213 is formed on the end cover 240, and the other is formed on the pump body 230. The connecting groove is used to connect the volume chamber 211 and the second channel 213 formed on the end cover 240. channel on the pump body 230. By forming the first channel 212 or the second channel 213 on the end cap 240 , fluid can be easily discharged or introduced in the moving direction of the plunger 220 .

In other embodiments, both the first channel 212 and the second channel 213 can be opened on the end cover 240 .

Referring to Figure 2 and Figure 5 together, in one embodiment, the pump body 210 includes a pump body 230 and a back cover 250. One end of the pump body 230 is formed with a volume chamber 211, a first channel 212 and a second channel 213. The pump body 230 An installation cavity 214 is formed at the other end of the pump body 230. The back cover 250 is covered on the other end of the pump body 230, and a rotation hole 252 is provided on the back cover 250. One end of the power shaft 120 is connected to a connecting rod 122, and the connecting rod 122 It is inserted into the rotation hole 252 and connected with the power source 110 . The power shaft 120 and the reciprocating part 130 are conveniently packaged in the installation cavity 214 through the back cover 250 . In this embodiment, a connection hole is provided at one end of the power shaft 120 , and one end of the connecting rod 122 is inserted into the connection hole and connected with the power shaft 120 . Further, one end of the connecting rod 122 is fixed in the connecting hole through a bolt.

Specifically, a rolling bearing 260 is provided between the connecting rod 122 and the inner wall of the rotation hole 252 . The friction between the connecting rod 122 and the inner wall of the rotation hole 252 is reduced through the rolling bearing 260 to ensure that the connecting rod 122 drives The stability of the rotation of the power shaft 120.

In one embodiment, a plane bearing 270 is provided between the inner wall of the back cover 250 facing the installation cavity 214 and the power shaft 120 . Specifically, the diameter of the power shaft 120 is larger than the diameter of the connecting rod 122 , which facilitates the end surface of the power shaft 120 to abut against the rear cover 250 through the plane bearing 270 . The plane bearing 270 can effectively ensure the rotation of the power shaft 120 relative to the back cover 250 and ensure rotation stability. In this embodiment, the plane bearing 270 is a thrust ball bearing or a thrust needle roller bearing. In other embodiments, the power shaft 120 can also abut against the back cover 250 through other structures that can ensure its rotational stability relative to the back cover 250 .

In one embodiment, the power source 110 is connected to the power shaft 120 through a reduction gear set 140 . Specifically, a mounting cover 280 is provided on the side of the back cover 250 facing away from the pump body 230 . The mounting cover 280 is connected to the back cover 250 so that the reduction gear set 140 is located between the back cover 250 and the mounting cover 280 . By disposing the reduction gear set 140 in the space between the rear cover 250 and the installation cover 280, the operation of the reduction gear set 140 can be effectively protected.

In this embodiment, the power source 110 is a motor or motor. In other embodiments, the power source 110 may also be other power components capable of driving the power shaft 120 to rotate.

Referring to Figures 3 and 6, in one embodiment, a guide structure is provided in the installation cavity 214, and the reciprocating part 130 is provided in the radial direction of the power shaft 120. The reciprocating part 130 cooperates with the guide structure, and the guide direction of the guide structure is It is consistent with the axis direction of the power shaft 120 . By arranging the reciprocating member 130 in the radial direction of the power shaft 120, and in the radial direction through the guide structure and the pump body 210, it is further avoided to increase the length of the installation cavity 214, and the guide structure has a negative impact on the power shaft. The size on one side of 120 in the radial direction is smaller, which is conducive to miniaturization.

Specifically, the reciprocating part 130 is sleeved on the power shaft 120 , and the guide structure cooperates with the side of the reciprocating part 130 facing away from the power shaft 120 .

In this embodiment, a guide groove 131 is formed on the outer wall of the reciprocating member 130. The guide structure is a guide rod 290. The length direction of the guide rod 290 is the axis direction of the power shaft 120. The guide rod 290 is inserted into the guide groove 131. , and can slide in the guide groove 131 . Through the cooperation between the guide groove 131 and the guide rod 290, the guide rod 290 is partially embedded in the reciprocating member 130 using the guide groove 131, thereby further avoiding an increase in the size of the pump body 210.

Specifically, the guide groove 131 is a semi-cylindrical groove. The guide rod 290 is a cylindrical rod.

In another embodiment, the guide rod 290 is integrally formed on the inner wall of the installation cavity 214 . The guide rod 290 is a semi-cylindrical guide rail formed on the inner wall of the installation cavity 214 . The semi-cylindrical guide rail passes through the guide groove 131 .

In another embodiment, the guide structure is a guide groove formed on the inner wall of the installation cavity 214, the length direction of the guide groove is the axis direction of the power shaft 120, and a guide protrusion is formed on the outer wall of the reciprocating member 130, so The guide protrusion passes through the guide groove 131 and can slide in the guide groove. The guide protrusion slides in the guide groove to guide the reciprocating movement of the reciprocating part 130 .

In one embodiment, there are at least two guide structures, and each guide structure is spaced around the axis of the power shaft 120 . In this embodiment, there are four guide structures, and the four guide structures are spaced apart around the axis of the power shaft 120 . In other embodiments, the guide structure is disposed on the same side as the first joint 218 or the second joint 219 on the pump body 210 .

Referring to FIGS. 2 and 6 , in one embodiment, the reciprocating member 130 is sleeved on the power shaft 120 to ensure the stability of the movement of the reciprocating member 130 driven by the power source 120 . Specifically, the power shaft 120 is provided with a reciprocating guide rail. The reciprocating guide rail is a closed curved guide rail surrounding the axis of the power shaft 120 , and the wave peaks and troughs of the curved guide rail are spaced along the axis of the power shaft 120 ; the reciprocating member 130 includes a moving body 132 and the reciprocating body 133, the reciprocating body 133 is sleeved on the power shaft 120, the moving body 132 is located between the reciprocating body 133 and the power shaft 120, and the moving body 132 is guided and arranged on the reciprocating guide rail and is limited to the reciprocating body 133 , the moving body 132 can move on the reciprocating guide rail, and the plunger 220 is connected to the reciprocating body 133 .

In this embodiment, the reciprocating guide rail is a reciprocating groove 124. The reciprocating groove 124 is a closed curved groove surrounding the axis of the power shaft 120, and the wave peaks and troughs of the curved groove are spaced apart along the axis of the power shaft 120; the moving body 132 Penetrated in the reciprocating groove 124 and limited on the reciprocating body 133 , the moving body 132 can move in the reciprocating groove 124 .

When the power shaft 120 rotates, the moving body 132 can move in the reciprocating groove 124, so that the moving body 132 can move between the wave peaks and the wave troughs of the curved groove, so as to realize the reciprocating movement of the moving body 132 along the axis direction of the power shaft 120. For the purpose of movement, the reciprocating body 133 drives the plunger 220 to reciprocate along the axis direction of the power shaft 120 . The rotational motion of the power shaft 120 is converted into the linear motion of the reciprocating body 133 along the axis of the power shaft 120. There will be no yaw intersection problem of the crank structure or the eccentric drive structure, and the work stability is better.

In another embodiment, the reciprocating guide rail is a guide protrusion, and the guide protrusion is a closed strip-shaped curved protrusion surrounding the axis of the power shaft 120, and the peaks and troughs of the curved protrusion are spaced apart along the axis of the power shaft 120; moving The body 132 is disposed on the guide protrusion and can move along the length direction on the guide protrusion.

In one embodiment, there are at least two reciprocating guide rails, each reciprocating guide rail is spaced along the axis of the power shaft 120 , and at least one moving body 132 is provided on each reciprocating guide rail. By arranging at least two reciprocating guide rails, the stability of the moving body 132 driving the plunger 220 can be improved.

In another embodiment, the power shaft 120 is also provided with a balance guide rail that is arranged opposite to the reciprocating guide rail along the axis of the power shaft 120. The balance guide rail is a closed curved guide rail surrounding the axis of the power shaft 120, and the wave crest of the curved guide rail is The wave troughs are arranged at intervals along the axis of the power shaft 120; and the wave crests of the balance guide rail are opposite to the wave troughs of the reciprocating guide rail along the axial direction, and the wave troughs of the balance guide rail are opposite to the wave crests of the reciprocating guide rail along the axial direction. A balance body is provided on the balance guide rail. The balance body and the moving body 132 are arranged oppositely along the axis of the power shaft 120. When the power shaft 120 rotates, the balance body and the moving body 132 move toward or away from each other. By arranging the balance guide rail and the balance body, the movement process of the balance body and the moving body 132 can be double. Offset the acceleration and reduce the vibration caused by acceleration.

Specifically, the balance guide rail has the same structure as the reciprocating guide rail, and the balance guide rail is symmetrically arranged along the circumference of the power shaft relative to the reciprocating guide rail. In this embodiment, the balance body and the moving body 132 have the same structure.

In this embodiment, the reciprocating body 133 is provided with a reciprocating hole 136 , and the power shaft 120 is inserted into the reciprocating hole 136 , so that the moving body 132 is located between the inner wall of the reciprocating body 133 and the power shaft 120 . Specifically, the plunger 220 and the reciprocating body 133 are connected through screws from one side of the reciprocating hole 136 . Further, an assembly hole is opened on the bottom wall of the reciprocating hole 136 opposite to the power shaft 120. The plunger 220 is aligned with the assembly hole, and the connecting screw passes through the assembly hole to connect the plunger 220 and the reciprocating body 133.

In this embodiment, the number of moving bodies 132 is at least two. Each moving body 132 is spaced around the axis of the power shaft 120 , and the power shaft 120 can drive each moving body 132 to move in the same direction. Specifically, there are two moving bodies 132 , and the two moving bodies 132 are symmetrically arranged around the axis of the power shaft 120 . When the power shaft 120 rotates, it can drive each moving body 132 to move in the same direction, and each moving body 132 is limited to the reciprocating body 133 . The stability of the transmission can be further improved by at least two moving bodies 132 . In other embodiments, the number of moving bodies 132 may also be other numbers. Each moving body 132 is evenly arranged around the axis of the power shaft 120 to ensure the stability of the transmission force of the reciprocating body 133.

In one embodiment, the moving body 132 is a sphere, and the moving body 132 can roll in the reciprocating groove 124 . By arranging the moving body 132 as a sphere, the friction force of the moving body 132 when moving can be reduced.

In one embodiment, an oil guide groove 126 is formed on the inner wall of the reciprocating groove 124 . Lubricating oil can be placed in the oil guide groove 126, and when the moving body 132 moves in the reciprocating groove 124, the lubricating oil can be used to further reduce frictional resistance and ensure smooth transmission.

Specifically, the oil guide groove 126 is a closed curved groove surrounding the axis of the power shaft 120 . Since the oil guide groove 126 is disposed on the inner wall of the reciprocating groove 124, the groove shape of the oil guide groove 126 is consistent with the groove shape of the reciprocating groove 124, ensuring that there is lubricating oil wherever the moving body 132 moves to the reciprocating groove 124. , This further ensures reduced frictional resistance. In other embodiments, there may be at least two oil guide grooves 126 , and each oil guide groove 126 is spaced apart around the axis of the power shaft 120 .

Referring to FIG. 7 , in one embodiment, the reciprocating member 130 further includes a matching sleeve 134 . The matching sleeve 134 is sleeved on the moving body 132 and installed on the reciprocating body 133 . Specifically, since the moving body 132 is a sphere, the moving body 132 can roll relative to the matching sleeve 134 . The matching sleeve 134 prevents the moving body 132 from directly rolling and friction with the reciprocating body 133 .

Further, a plurality of rolling balls 135 are provided between the moving body 132 and the inner wall of the mating sleeve 134 . In this embodiment, the plurality of balls 135 are in contact with the side of the moving body 132 facing away from the power shaft 120 . When the moving body 132 rolls relative to the matching sleeve 134, the plurality of balls 135 are used to further reduce the rolling friction, further improve the rolling smoothness of the moving body 132, and ensure the stability of the transmission.

In one embodiment, the inner wall of the reciprocating body 133 is provided with a mounting hole 137 connected with the reciprocating hole 136 , and the matching sleeve 134 is installed in the mounting hole 137 . Specifically, the mounting hole 137 penetrates the outer wall of the reciprocating body 133, and a mounting plate 138 is provided at one end of the matching sleeve 134. The matching sleeve 134 is inserted into the mounting hole 137, so that the mounting plate 138 contacts the reciprocating body 133. on the outer wall of the body 133 and installed on the reciprocating member 133. Specifically, the moving body 132 can pass through the mounting hole 137 . By the mounting plate 138 being in contact with and installed on the outer wall of the reciprocating body 133 , the moving body 132 and the matching sleeve 134 are assembled on the reciprocating body 133 .

In this embodiment, the mounting plate 138 and the matching sleeve 134 are integrally formed.

In one embodiment, the position of the matching sleeve 134 may correspond to the positions of the first connector 218 and the second connector 219 on the outer wall of the pump body 210 . The size of the matching sleeve 134 in the direction in which the first joint 218 or the second joint 219 is disposed is used to avoid increasing the size of the pump body 210 in other directions due to the disposing of the matching sleeve 134 .

In one embodiment, the plunger pump 10 further includes a protective shell (not shown). The reciprocating component 100 is disposed in the protective shell, and the reciprocating component 100 is protected by the protective shell. Specifically, a moist layer is formed inside the protective shell The lubricating oil chamber, the power shaft 120 and the reciprocating part 130 are all located in the lubricating oil chamber. Further, the guide rod 290 is also located in the lubricating oil chamber. By adding lubricating oil to the lubricating oil chamber, the stability of the transmission between the power shaft 120 and the reciprocating part 13 can be ensured, and the stability of the guidance through the guide rod 290 can be ensured. Moreover, since the oil guide groove 126 is provided on the inner wall of the reciprocating groove 124, the lubricating oil can also be It can further enter the oil guide groove 126 and play a lubricating role in the movement of the moving body 132, which not only improves the life of each component, but also facilitates increasing the reciprocating speed.

In one embodiment, a pump device includes the plunger pump 10 of any of the above embodiments.

Specifically, the pump equipment further includes a spray joint, a water inlet channel and a water outlet channel are formed in the spray joint, and the spray joint is installed on the pump body 210 so that the first channel 212 is connected with the inlet channel. The water channel is connected, and the second channel 213 is connected with the water outlet channel. By arranging the spray joint, it is further facilitated that the fluid enters the pump body 210 through the water inlet channel and is sprayed out through the water outlet channel, which is convenient for use.

In one embodiment, the pump device is a cleaning machine. Specifically, the plunger pump 10 in this embodiment is a double-acting pump.

In one embodiment, the pump equipment is a cleaning machine. Specifically, the plunger pump in this embodiment is a single-acting pump.

In other embodiments, the pump device may also be a sprayer. For example, it can be a high-pressure sprayer, a pesticide sprayer, a high-pressure sprayer or a high-pressure cleaning machine.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-mentioned embodiments only express several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that for those in this field For those of ordinary skill, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the device or device referred to. Elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified limitations. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. The first characteristic is in the second The features "below", "below" and "under" may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Claims

A plunger pump, characterized in that the plunger pump includes:

Reciprocating assembly, the reciprocating assembly includes a power source, a power shaft and a reciprocating part. The reciprocating part is transmission matched with the power shaft, so that the power shaft can drive the reciprocating part to reciprocate along the axis direction of the power shaft. move; and

Pump assembly, the pump assembly includes a pump body and a plunger, a volume chamber is formed in the pump body, and a first channel and a second channel connected to the volume cavity are formed on the outer wall of the pump body, the The pump body is also formed with an installation cavity communicated with the volume chamber, the plunger is connected to the reciprocating part, and the plunger penetrates the volume chamber so that the power shaft and the reciprocating part Located in the installation cavity, the power source is used to drive the power shaft to rotate to drive the plunger to reciprocate in the volume cavity through the reciprocating member, so that the fluid can flow from the first channel It is sucked into the volume chamber and discharged from the second channel.
The plunger pump according to claim 1, wherein a guide structure is provided in the installation cavity, the reciprocating part is arranged in the radial direction of the power shaft, and the reciprocating part and the guide structure The guide cooperates, and the guide direction of the guide structure is consistent with the axis direction of the power shaft.
The plunger pump according to claim 2, wherein a guide groove is formed on the outer wall of the reciprocating member, the guide structure is a guide rod, and the length direction of the guide rod is the axial direction of the power shaft. , the guide rod penetrates the guide groove and can slide in the guide groove; or

The guide structure is a guide groove formed on the inner wall of the installation cavity. The length direction of the guide groove is the axis direction of the power shaft. The outer wall of the reciprocating part is formed with a guide protrusion. The guide protrusion is formed on the inner wall of the installation cavity. The protrusion passes through the guide groove and can slide in the guide groove.
The plunger pump according to any one of claims 1 to 3, characterized in that the power shaft is provided with a reciprocating guide rail, the reciprocating guide rail is a closed curved guide rail surrounding the axis of the power shaft, and the reciprocating guide rail is The wave peaks and wave troughs of the curved guide rail are spaced along the axis of the power shaft; the reciprocating part includes a moving body and a reciprocating body, the reciprocating body is sleeved on the power shaft, and the moving body is located on the reciprocating body. between the body and the power shaft, and the moving body guide is provided on the reciprocating guide rail and is limited to the reciprocating body, the moving body can move on the reciprocating guide rail, and the plunger is connected to The reciprocating body.
The plunger pump according to claim 4, wherein the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curved groove surrounding the axis of the power shaft, and the moving body is inserted through the reciprocating groove. The oil guide groove is provided on the inner wall of the reciprocating groove, the moving body is a sphere, and the moving body can roll in the reciprocating groove.
The plunger pump according to claim 5, wherein the oil guide groove is a closed curved groove surrounding the axis of the power shaft.
The plunger pump according to claim 5, characterized in that the reciprocating part further includes a matching sleeve, the matching sleeve is sleeved on the moving body and installed on the reciprocating body, the moving body and the A plurality of rolling balls are arranged between the inner walls of the matching sleeve, and the moving body can roll relative to the matching sleeve.
The plunger pump according to claim 4, wherein the power shaft is further provided with a balance guide rail that is spaced opposite to the reciprocating guide rail along the axis of the power shaft, and the balance guide rail surrounds the power shaft. The closed curve guide rail of the shaft axis, and the wave peaks and wave troughs of the balance guide rail are arranged at intervals along the axis of the power shaft; and the wave peaks of the balance guide rail are opposite to the wave troughs of the reciprocating guide rail along the axis direction, and the balance guide rail The wave trough is opposite to the wave crest of the reciprocating guide rail along the axial direction; a balance body is provided on the balance guide rail, and the balance body and the moving body are arranged oppositely along the axis of the power shaft. When the power shaft rotates , the balance body and the moving body move toward or away from each other.
The plunger pump according to any one of claims 1 to 3, characterized in that the pump body includes a pump body and a back cover, and one end of the pump body is formed with a volume chamber, the first channel and the The second channel, the installation cavity is formed at the other end of the pump body, and the back cover is provided at the other end of the pump body. on the back cover, and a rotation hole is provided on the back cover. One end of the power shaft is connected to a connecting rod. The connecting rod is passed through the rotation hole and connected to the power source, and the connecting rod is connected to the power source. A rolling bearing is provided between the inner walls of the rotation hole; a plane bearing is provided between the inner wall of the back cover facing the installation cavity and the power shaft.
The plunger pump according to any one of claims 1 to 3, characterized in that a guide sleeve and a sealing sleeve are provided on the inner wall of the volume chamber, and the sealing sleeve is located at the side of the guide sleeve facing away from the On one side of the reciprocating part, the plunger passes through the guide sleeve and the sealing sleeve facing away from the front end of the reciprocating part, and the front end of the plunger does not pass through during the reciprocating stroke. The sealing sleeve.
A pump device, characterized in that the pump device includes the plunger pump according to any one of claims 1-10.