Plunger pump valve plate oil film support and cylinder body sealing structure

Abstract

The invention relates to the technical field of plunger pump valve plates, in particular to a plunger pump valve plate oil film supporting and cylinder body sealing structure which comprises a first-stage valve plate, a second-stage valve plate is rotatably mounted on the outer side of the first-stage valve plate, a third-stage valve plate is rotatably mounted on the outer side of the second-stage valve plate, and a first-stage valve plate is rotatably mounted on the outer side of the third-stage valve plate. A first-stage valve plate, a second-stage valve plate and a third-stage valve plate are arranged on the surface of the first-stage valve plate, rotating buffer structures are arranged among the first-stage valve plate, the second-stage valve plate and the third-stage valve plate, magnets are arranged on the surface of the second-stage valve plate, an oil film sleeve shell is arranged on the surface of the third-stage valve plate, and magnetic oil film adsorption structures are arranged in adsorption small holes in the oil film sleeve shell. The second-stage valve plate and the third-stage valve plate are linked to rotate reversely by rotating the buffer structure, so that the effect of relieving reverse rotation impact force is achieved, magnets on the surface of the second-stage valve plate can adsorb magnetic oil film adsorption structures on the oil film sleeve shell, and conical micro-pit lines are formed on the surface of the oil film sleeve shell, so that the effect of capturing and supporting oil liquid is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of a plunger pump valve plate, and in particular to an oil film support and cylinder body sealing structure of a plunger pump valve plate. Background Art

[0002] The plunger pump is a common pump in the hydraulic system. It realizes the suction and discharge of liquid through the reciprocating motion of the plunger, and the valve plate is a key component inside the plunger pump. The plunger pump controls the flow path of the liquid by the rotation of the valve plate. In order to reduce the friction and wear between the valve plate and the inner wall of the cylinder, technicians in this field usually inject lubricating oil between the valve plate and the cylinder body, so that the lubricating oil forms a stable film between the valve plate and the cylinder surface. This oil film can effectively bear the weight and pressure of the valve plate and avoid direct metal contact, thereby reducing wear and improving the durability and efficiency of the pump. At the same time, in order to ensure that the lubricating oil inside the pump does not leak, a corresponding cylinder sealing structure (such as a rubber sealing ring) is also required. In summary, in the plunger pump, the cylinder sealing structure and the oil film support work together to form a closed working environment, ensuring the efficient operation and long life of the pump.

[0003] In the actual application of the plunger pump, the plunger pump can control the forward or reverse flow of the liquid by controlling the clockwise or counterclockwise rotation of the valve plate. However, when the forward-rotating valve plate suddenly reverses, the oil film support between the valve plate and the cylinder surface will be affected, causing some problems:

[0004] 1. When the valve plate suddenly reverses, the originally stable oil film support may be destroyed due to the change in fluid pressure and direction. The rupture of the oil film may cause direct contact between metal surfaces, resulting in friction and wear, increasing the friction between the valve plate and the cylinder body, and may also cause local high temperature and wear, shortening the life of the valve plate and the cylinder body;

[0005] 2. The stability of the oil film support depends on the dynamic characteristics of the fluid. When the fluid suddenly reverses, the flow direction and pressure distribution of the fluid may change significantly, which will affect the thickness and uniformity of the oil film and thus the support effect.

[0006] 3. The oil film support not only supports the valve plate, but also helps seal and prevent leakage. Reversal may change the stress of the cylinder sealing structure, causing seal failure and leakage.

[0007] Therefore, it is necessary to invent a plunger pump distribution plate oil film support and cylinder sealing structure. Summary of the Invention

[0008] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a plunger pump valve plate oil film support and cylinder sealing structure, comprising a multi-stage buffer valve plate and a sealing shell;

[0009] The multi-stage buffer distribution disc includes a first-stage distribution disc, a second-stage distribution disc is rotatably mounted on the outer side of the first-stage distribution disc, a third-stage distribution disc is rotatably mounted on the outer side of the second-stage distribution disc, protrusions are provided at both ends of the first-stage distribution disc, a plunger inner cavity is provided in the first-stage distribution disc, a drive rod is inserted and installed in the middle of the first-stage distribution disc, a rotation buffer structure is installed between the first-stage distribution disc, the second-stage distribution disc and the third-stage distribution disc, a magnet is installed on the surface of the second-stage distribution disc, an oil film shell is installed on the surface of the third-stage distribution disc, adsorption holes are provided on the oil film shell, and a magnetic oil film adsorption structure is provided in the adsorption holes;

[0010] The sealed shell includes an outer shell, and a front guard plate and a rear guard plate are respectively installed at both ends of the outer shell. The protrusions at both ends of the first-stage distribution plate pass through the front guard plate and the rear guard plate respectively. Cylinder sealing bearings are installed in the middle of the front guard plate and the rear guard plate. A plunger pump port is installed on the front guard plate, and two through holes are provided in the plunger pump port.

[0011] Preferably, a sliding kit is fixedly installed on the surface of the first-stage distribution disc, a groove is provided on the inner wall of the second-stage distribution disc, and the sliding kit is slidably installed in the groove on the inner wall of the second-stage distribution disc, a protrusion is provided on the surface of the second-stage distribution disc, and a groove is provided on the inner wall of the third-stage distribution disc, and the protrusion on the surface of the second-stage distribution disc is slidably installed in the groove on the inner wall of the third-stage distribution disc.

[0012] Preferably, a first oil guide hole is provided at both ends of the secondary distribution disc, and the first oil guide hole extends through and into the groove on the inner wall of the secondary distribution disc; a second oil guide hole is provided at both ends of the tertiary distribution disc, and the second oil guide hole extends through and into the groove on the inner wall of the tertiary distribution disc.

[0013] Preferably, the rotation buffer structure includes an inner rotating shaft, which is rotatably installed at both ends of the first-stage distribution plate, and the inner rotating shaft is rotatably installed with an inner swing arm, and the inner swing arm is connected to the inner sliding shaft. A number of first sliding grooves are arranged around both ends of the second-stage distribution plate, and an inner sliding cover is installed on the first sliding groove, and the inner sliding shaft is slidably installed in the first sliding groove.

[0014] Preferably, the rotation buffer structure includes an outer rotating shaft, which is rotatably installed at both ends of the secondary distribution plate, and the outer rotating shaft is rotatably installed with an outer swing arm, and the outer swing arm is connected to the outer sliding shaft. A number of second slide grooves are arranged around both ends of the three-stage distribution plate, and an outer sliding cover is installed on the second slide groove, and the outer sliding shaft is slidably installed in the second slide groove.

[0015] Preferably, the magnets installed on the surface of the secondary distribution disc are divided into two rows, and the two rows of magnets are distributed on the surface of the secondary distribution disc with forward threads and reverse threads respectively. The adsorption holes set on the oil film shell are also divided into two rows, and the two rows of adsorption holes are distributed on the surface of the oil film shell with forward threads and reverse threads respectively.

[0016] Preferably, the magnetic oil film adsorption structure includes a rubber stretching film, which is fixedly mounted on the inner wall of one end of the adsorption hole away from the three-stage distribution plate, and a stretching sheet is fixedly mounted in the middle of the rubber stretching film.

[0017] Preferably, the magnetic oil film adsorption structure includes a magnetic slider, which is slidably installed in the adsorption hole, the upper end of the magnetic slider is connected to the stretching plate, and the lower end of the magnetic slider is installed with a spring, and the magnetic slider can be magnetically adsorbed by the magnet.

[0018] Preferably, the cylinder sealing bearing includes a ball groove, which is arranged on the raised outer walls at both ends of the first-stage distribution plate, and the inner sides of the front guard plate and the rear guard plate are also provided with slots, and balls are filled between the front guard plate slots or the rear guard plate slots and the ball grooves. The raised outer walls at both ends of the first-stage distribution plate are also installed with sealing rings, and the sealing rings are tightly attached to the ball grooves.

[0019] Preferably, the outer shell and the rear guard plate are sealed and welded together, the front guard plate is fixedly installed on one end of the outer shell by bolts, a sealing strip is provided at the connection between the front guard plate and the outer shell, and supporting oil is injected into the outer shell.

[0020] The beneficial effects of the present invention are:

[0021] 1. When the drive shaft drives the first-stage valve plate to suddenly reverse, the first-stage valve plate will reverse the second-stage valve plate through the rotating buffer structure, and then the second-stage valve plate will reverse the third-stage valve plate through the rotating buffer structure. This achieves the effect of reducing the reversal impact force through multiple levels of reversal, thereby preventing the oil film from rupturing during sudden reversal, effectively reducing the friction between the valve plate and the cylinder body, avoiding local high temperature and wear, and thus extending the service life of the valve plate and cylinder body;

[0022] 2. When the secondary distribution plate pulls the tertiary distribution plate to rotate forward or reverse, the magnet on the surface of the secondary distribution plate will adsorb the magnetic oil film adsorption structure on the oil film shell on the surface of the tertiary distribution plate, and present conical micro-pit patterns with forward or reverse spiral distribution on the surface of the oil film shell, so as to achieve the effect of capturing and storing the supporting oil, so that the oil film shell can more effectively guide the flow of the supporting oil during the operation of the machine, maintain the thickness and uniformity of the oil film, and enhance the stability of the oil film, thereby improving the supporting effect of the oil film and further improving the sealing of the cylinder structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the sealed housing structure provided by the present invention;

[0024] Figure 2 A cross-sectional view of the front guard plate provided by the present invention;

[0025] Figure 3 A cross-sectional view of the sealing housing provided by the present invention;

[0026] Figure 4 A schematic diagram of the structure of a multi-stage buffer distribution plate provided by the present invention;

[0027] Figure 5 A schematic diagram of magnet distribution provided by the present invention;

[0028] Figure 6 A cross-sectional view of each level of distribution plates provided by the present invention;

[0029] Figure 7 The present invention provides Figure 6 Detail of Figure A;

[0030] Figure 8 An overall side sectional view provided for the present invention;

[0031] Figure 9 A detailed side view of the multi-stage buffer distribution plate provided by the present invention;

[0032] Figure 10 This is a schematic diagram of the assembly of the rotation buffer structure provided by the present invention;

[0033] Figure 11 A schematic diagram of the internal structure of the sealed housing provided by the present invention;

[0034] Figure 12 A cross-sectional view of the secondary and tertiary distribution plates provided by the present invention;

[0035] Figure 13 This is a cross-sectional view of the multi-stage buffer distribution plate provided by the present invention.

[0036] In the figure: front guard plate 111, outer shell 112, rear guard plate 113, plunger pump port 114, drive rod 12, first-stage distribution plate 131, sliding kit 132, protrusion 133, plunger inner cavity 134, ball groove 141, ball 142, sealing ring 143, second-stage distribution plate 151, first oil guide hole 152, first slide groove 153, magnet 154, third-stage distribution plate 161, second oil guide hole 162, second slide groove 163, oil film shell 164, adsorption hole 165, magnetic slider 171, stretching sheet 172, rubber stretching film 173, spring 174, inner rotating shaft 181, inner swing arm 182, inner sliding shaft 183, inner sliding cover 184, outer rotating shaft 191, outer swing arm 192, outer sliding shaft 193, outer sliding cover 194. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0038] Example 1, as Figure 1 - Figure 6 and Figure 11 - Figure 13 As shown, the plunger pump valve plate oil film support and cylinder sealing structure in the embodiment of the first aspect of the present invention includes a multi-stage buffer valve plate and a sealing shell;

[0039] The multi-stage buffer distribution plate includes a first-stage distribution plate 131, a second-stage distribution plate 151 is rotatably installed on the outer side of the first-stage distribution plate 131, a third-stage distribution plate 161 is rotatably installed on the outer side of the second-stage distribution plate 151, protrusions 133 are provided at both ends of the first-stage distribution plate 131, a plunger inner cavity 134 is provided in the first-stage distribution plate 131, a drive rod 12 is inserted into the middle of the first-stage distribution plate 131, a rotation buffer structure is installed between the first-stage distribution plate 131, the second-stage distribution plate 151 and the third-stage distribution plate 161, a magnet 154 is installed on the surface of the second-stage distribution plate 151, an oil film shell 164 is installed on the surface of the third-stage distribution plate 161, an adsorption hole 165 is provided on the oil film shell 164, and a magnetic oil film adsorption structure is provided in the adsorption hole 165;

[0040] The sealed shell includes an outer shell 112, and a front guard plate 111 and a rear guard plate 113 are respectively installed at both ends of the outer shell 112. The protrusions 133 at both ends of the first-stage distribution plate 131 pass through the front guard plate 111 and the rear guard plate 113 respectively. Cylinder sealing bearings are installed in the middle of the front guard plate 111 and the rear guard plate 113. A plunger pump port 114 is installed on the front guard plate 111, and two through holes are provided in the plunger pump port 114.

[0041] In the above embodiment, it should be noted that a plunger is slidably mounted in the plunger inner cavity 134 of the first-stage distribution plate 131, the drive rod 12 is connected to the remaining structural components of the motor and the plunger pump, and the remaining structural components of the motor and the plunger pump are all arranged on one side of the rear guard plate 113. The two through holes in the plunger pump port 114 are respectively the suction port and the discharge port. By the reverse rotation of the first-stage distribution plate 131, the suction port and the discharge port can be switched to achieve the effect of reverse delivery;

[0042] When the drive shaft drives the first-stage distribution plate 131 to suddenly reverse, the first-stage distribution plate 131 rotates the buffer structure to link the second-stage distribution plate 151 to reverse, and then the second-stage distribution plate 151 rotates the buffer structure to link the third-stage distribution plate 161 to reverse, so as to achieve the effect of reducing the reversal impact force through multi-stage layer-by-layer reversal, thereby preventing the oil film from rupturing during sudden reversal, effectively reducing the friction between the distribution plate and the cylinder body, avoiding local high temperature and wear, and thus improving the service life of the distribution plate and the cylinder body;

[0043] When the secondary distribution plate 151 pulls the tertiary distribution plate 161 to rotate forward or reverse, the magnet on the surface of the secondary distribution plate 151 will attract the magnetic oil film adsorption structure on the oil film shell 164 on the surface of the tertiary distribution plate 161, and present conical micro-pit patterns with a forward or reverse spiral distribution on the surface of the oil film shell 164, so as to achieve the effect of capturing and storing the supporting oil, so that the oil film shell can more effectively guide the flow of the supporting oil during the operation of the machine, maintain the thickness and uniformity of the oil film, and enhance the stability of the oil film, thereby improving the supporting effect of the oil film and further improving the sealing performance of the cylinder structure;

[0044] Conical micro-pit patterns are a type of surface texture design that is typically used to enhance the lubrication performance of friction surfaces, reduce wear, and improve fluid mechanics, especially in the fields of mechanical parts, bearings, seals, etc. These patterns are a technology that technicians in this field can access through searching.

[0045] Example 2, as Figure 2 - Figure 6 、 Figure 8 、 Figure 9 and Figure 11 - Figure 13 As shown, the plunger pump distribution plate oil film support and cylinder sealing structure includes embodiment 1. In addition, a sliding kit 132 is fixedly installed on the surface of the first-stage distribution plate 131, a groove is provided on the inner wall of the second-stage distribution plate 151, and the sliding kit 132 is slidably installed in the groove on the inner wall of the second-stage distribution plate 151. The surface of the second-stage distribution plate 151 is provided with a protrusion, and the inner wall of the third-stage distribution plate 161 is provided with a groove. The surface protrusion of the second-stage distribution plate 151 is slidably installed in the groove on the inner wall of the third-stage distribution plate 161, and the two ends of the second-stage distribution plate 151 are provided with A first oil guide hole 152 is provided, and the first oil guide hole 152 extends through the inner wall groove of the secondary distribution plate 151. Second oil guide holes 162 are provided at both ends of the tertiary distribution plate 161, and the second oil guide holes 162 extend through the inner wall groove of the tertiary distribution plate 161. The outer shell 112 and the rear guard plate 113 are sealed and welded together, and the front guard plate 111 is fixedly installed at one end of the outer shell 112 by bolts. A sealing strip is provided at the connection between the front guard plate 111 and the outer shell 112, and supporting oil is injected into the outer shell 112.

[0046] In the above embodiment, it should be noted that a gap is provided between the sliding sleeve 132 and the inner wall groove of the secondary distribution plate 151. The supporting oil in the outer shell 112 penetrates through the first oil guide hole 152 and flows into the gap between the sliding sleeve 132 and the secondary distribution plate 151 to form an oil film, thereby achieving the effect of reducing wear between the sliding sleeve 132 and the secondary distribution plate 151.

[0047] Similarly, a gap is provided between the protrusion on the surface of the secondary distribution plate 151 and the groove on the inner wall of the tertiary distribution plate 161. The supporting oil in the outer shell 112 penetrates through the second oil guide hole 162 and flows into the gap between the secondary distribution plate 151 and the tertiary distribution plate 161 to form an oil film, thereby achieving the effect of reducing the wear between the secondary distribution plate 151 and the tertiary distribution plate 161.

[0048] Example 3, as Figure 8 - Figure 10 As shown, the plunger pump distribution plate oil film support and cylinder sealing structure includes embodiment 1. In addition, the rotation buffer structure includes an inner shaft 181, which is rotatably mounted on both ends of the first-stage distribution plate 131. The inner shaft 181 is rotatably mounted with an inner swing arm 182, and the inner swing arm 182 is connected to the inner sliding shaft 183. A plurality of first chutes 153 are arranged around both ends of the second-stage distribution plate 151. The first chute 153 is mounted with an inner sliding cover 184. The inner sliding shaft 1 83 is slidably installed in the first slide groove 153, and the rotation buffer structure includes an outer rotating shaft 191, which is rotatably installed at both ends of the secondary distribution plate 151. The outer rotating shaft 191 is rotatably installed with an outer swing arm 192, and the outer swing arm 192 is connected to the outer sliding shaft 193. A number of second slide grooves 163 are arranged around both ends of the third distribution plate 161, and an outer sliding cover 194 is installed on the second slide groove 163. The outer sliding shaft 193 is slidably installed in the second slide groove 163.

[0049] In the above embodiment, it should be noted that when the drive shaft drives the first-stage distribution plate 131 to rotate forward, the first-stage distribution plate 131 pulls the inner rotating shaft 181 to drive the inner swing arm 182, and the inner swing arm 182 drives the inner sliding shaft 183 to pull the second-stage distribution plate 151, and then the second-stage distribution plate 151 pulls the outer rotating shaft 191 to drive the outer swing arm 192, and the outer swing arm 192 drives the outer sliding shaft 193 to pull the third-stage distribution plate 161, so as to achieve the effect of driving the first-stage distribution plate 131, the second-stage distribution plate 151 and the third-stage distribution plate 161 to rotate;

[0050] The inner swing arm 182 and the outer swing arm 192 are made of high-strength rubber material, which can effectively absorb the impact force of reverse rotation through deformation and stretching. The inner sliding cover 184 prevents the inner sliding shaft 183 from falling out of the first sliding groove 153, and the outer sliding cover 194 prevents the outer sliding shaft 193 from falling out of the second sliding groove 163.

[0051] When the driving shaft drives the first-stage distribution disc 131 to reverse suddenly, the first-stage distribution disc 131 pulls the inner rotating shaft 181 to drive the inner swing arm 182, and the inner swing arm 182 drives the inner sliding shaft 183 to slide to the other end of the first slide groove 153, and then the inner sliding shaft 183 pulls the second-stage distribution disc 151 to reverse, and then the second-stage distribution disc 151 pulls the outer rotating shaft 191 to drive the outer swing arm 192, and the outer swing arm 192 drives the outer sliding shaft 193 to slide to the other end of the second slide groove 163, and then the outer sliding shaft 193 pulls the third-stage distribution disc 161 to reverse, so as to achieve the effect of multi-stage and layer-by-layer reversal of the first-stage distribution disc 131, the second-stage distribution disc 151 and the third-stage distribution disc 161.

[0052] Example 4, as Figure 4 - Figure 7 and Figure 11 As shown, the plunger pump distribution plate oil film support and cylinder sealing structure includes embodiment 3. In addition, the magnets 154 installed on the surface of the secondary distribution plate 151 are divided into two rows, and the two rows of magnets 154 are distributed on the surface of the secondary distribution plate 151 with forward threads and reverse threads respectively. The adsorption holes 165 set on the oil film shell 164 are also divided into two rows, and the two rows of adsorption holes 165 are distributed on the surface of the oil film shell 164 with forward threads and reverse threads respectively. The magnetic oil film adsorption structure includes a rubber stretching film 173, which is fixedly installed on the inner wall of the adsorption hole 165 at one end away from the tertiary distribution plate 161, and a stretching piece 172 is fixedly installed in the middle of the rubber stretching film 173. The magnetic oil film adsorption structure includes a magnetic slider 171, which is slidably installed in the adsorption hole 165, the upper end of the magnetic slider 171 is connected to the stretching piece 172, and the lower end of the magnetic slider 171 is installed with a spring 174. The magnetic slider 171 can be magnetically adsorbed by the magnet 154.

[0053] In the above embodiment, it should be noted that the spring 174 is made of a non-magnetic metal material. In the initial state, the spring 174 pushes up the magnetic slider 171, and the magnetic slider 171 moves upward and drives the stretching piece 172 to be flush with the end of the adsorption hole 165. At this time, the stretching piece 172 and the rubber stretching film 173 are level with the end of the adsorption hole 165.

[0054] Limited by the fixed sliding distance of the outer sliding shaft 193 in the second sliding groove 163, when the secondary distribution disc 151 rotates forward to the maximum angle, the magnet 154 with the positive thread distribution on the surface of the secondary distribution disc 151 moves to the specified position, and the magnet 154 with the positive thread distribution is located below the adsorption hole 165 with the positive thread distribution on the surface of the oil film housing 164. The magnet 154 attracts the magnetic slider 171 in the corresponding adsorption hole 165, and the magnetic slider 171 slides down and pulls the stretching sheet 172. The stretching sheet 172 pulls the rubber stretching film 173 downward to deform, so as to achieve the effect of forming a conical micro-pit at the end of the adsorption hole 165 with the positive thread distribution;

[0055] Similarly, when the secondary distribution plate 151 rotates in the opposite direction to the maximum angle, the magnet 154 with reverse thread distribution on the surface of the secondary distribution plate 151 moves to the specified position, and the magnet 154 with reverse thread distribution is located below the adsorption hole 165 with reverse thread distribution on the surface of the oil film housing 164. The magnet 154 attracts the magnetic slider 171 in the corresponding adsorption hole 165, and the magnetic slider 171 slides down and pulls the stretching sheet 172. The stretching sheet 172 pulls the rubber stretching film 173 downward to deform, so as to achieve the effect of forming a conical micro-pit at the end of the adsorption hole 165 with reverse thread distribution.

[0056] Example 5, as Figure 2 - Figure 6 and Figure 11 - Figure 13 As shown, the plunger pump distribution plate oil film support and cylinder sealing structure includes embodiment 2. In addition, the cylinder sealing bearing includes a ball groove 141, and the ball groove 141 is arranged on the outer wall of the protrusion 133 at both ends of the first-stage distribution plate 131. The inner side of the front guard plate 111 and the rear guard plate 113 is also provided with a groove, and balls 142 are filled between the groove of the front guard plate 111 or the groove of the rear guard plate 113 and the ball groove 141. The outer wall of the protrusion 133 at both ends of the first-stage distribution plate 131 is also installed with a sealing ring 143, and the sealing ring 143 is close to the ball groove 141.

[0057] In the above embodiment, it should be noted that when the first-stage distribution plate 131 rotates, the protrusions 133 at both ends of the first-stage distribution plate 131 drive the ball groove 141 to rotate, and drive the balls 142 in the ball groove 141, so as to achieve the effect of reducing the friction between the front guard plate 111, the rear guard plate 113 and the outer wall of the protrusion 133. The sealing ring 143 is made of a sealing rubber material that is resistant to high temperature and corrosion. The sealing ring 143 has the function of sealing the joints to prevent the supporting oil in the outer shell 112 from leaking.

[0058] The use process of the present invention is as follows: when a person skilled in the art controls the driving shaft to drive the first-stage distribution plate 131 to suddenly reverse, the first-stage distribution plate 131 pulls the inner rotating shaft 181 to drive the inner swing arm 182, and the inner swing arm 182 drives the inner sliding shaft 183 to slide to the other end of the first slide groove 153, and then the inner sliding shaft 183 pulls the second-stage distribution plate 151 to reverse, and then the second-stage distribution plate 151 pulls the outer rotating shaft 191 to drive the outer swing arm 192, and the outer swing arm 192 drives the outer sliding shaft 193 to slide to the other end of the second slide groove 163, and then the outer sliding shaft 193 pulls the third-stage distribution plate 161 to reverse, and during the linkage process, the inner swing arm 18 2 and the outer swing arm 192 are deformed and stretched to effectively absorb the impact force of the reverse rotation. At the same time, when the secondary distribution plate 151 rotates in the reverse direction to the maximum angle, the magnet 154 with a reverse thread distribution on the surface of the secondary distribution plate 151 moves to the specified position. The magnet 154 with a reverse thread distribution is located below the adsorption hole 165 with a reverse thread distribution on the surface of the oil film shell 164. The magnet 154 attracts the magnetic slider 171 in the corresponding adsorption hole 165. The magnetic slider 171 slides down and pulls the stretching sheet 172. The stretching sheet 172 pulls the rubber stretch film 173 downward to deform and form a conical micro-pit at the end of the adsorption hole 165 with a reverse thread distribution.

[0059] The above description is only a preferred embodiment of the present invention. Any person skilled in the art may modify the present invention using the technical solution described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. The plunger pump valve plate oil film support and cylinder sealing structure includes a multi-stage buffer valve plate and a sealing shell, characterized by: The multi-stage buffer distribution disc comprises a first-stage distribution disc (131), a second-stage distribution disc (151) is rotatably mounted on the outer side of the first-stage distribution disc (131), a third-stage distribution disc (161) is rotatably mounted on the outer side of the second-stage distribution disc (151), protrusions (133) are provided at both ends of the first-stage distribution disc (131), a plunger inner cavity (134) is provided in the first-stage distribution disc (131), and a drive element (134) is inserted and mounted in the middle of the first-stage distribution disc (131). A movable rod (12), a rotation buffer structure is installed between the first-stage distribution disc (131), the second-stage distribution disc (151) and the third-stage distribution disc (161), a magnet (154) is installed on the surface of the second-stage distribution disc (151), an oil film shell (164) is installed on the surface of the third-stage distribution disc (161), an adsorption hole (165) is provided on the oil film shell (164), and a magnetic oil film adsorption structure is provided in the adsorption hole (165); The sealed housing comprises an outer shell (112), a front guard plate (111) and a rear guard plate (113) are respectively installed at both ends of the outer shell (112), protrusions (133) at both ends of the first-stage distribution plate (131) respectively penetrate the front guard plate (111) and the rear guard plate (113), a cylinder sealing bearing is installed in the middle of the front guard plate (111) and the rear guard plate (113), a plunger pump port (114) is installed on the front guard plate (111), and two through holes are provided in the plunger pump port (114).

2. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 1, characterized in that: A sliding sleeve (132) is fixedly mounted on the surface of the first-stage distribution disc (131); a groove is provided on the inner wall of the second-stage distribution disc (151); the sliding sleeve (132) is slidably mounted in the groove on the inner wall of the second-stage distribution disc (151); a protrusion is provided on the surface of the second-stage distribution disc (151); a groove is provided on the inner wall of the third-stage distribution disc (161); the protrusion on the surface of the second-stage distribution disc (151) is slidably mounted in the groove on the inner wall of the third-stage distribution disc (161).

3. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 2, characterized in that: The two ends of the secondary distribution plate (151) are provided with first oil guide holes (152), and the first oil guide holes (152) extend through the groove on the inner wall of the secondary distribution plate (151). The two ends of the tertiary distribution plate (161) are provided with second oil guide holes (162), and the second oil guide holes (162) extend through the groove on the inner wall of the tertiary distribution plate (161).

4. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 1, characterized in that: The rotation buffer structure includes an inner rotating shaft (181), the inner rotating shaft (181) is rotatably mounted on both ends of the first-stage distribution plate (131), the inner rotating shaft (181) is rotatably mounted with an inner swing arm (182), the inner swing arm (182) is connected to the inner sliding shaft (183), and a plurality of first sliding grooves (153) are arranged around both ends of the second-stage distribution plate (151), an inner sliding cover (184) is mounted on the first sliding groove (153), and the inner sliding shaft (183) is slidably mounted in the first sliding groove (153).

5. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 4, characterized in that: The rotation buffer structure includes an outer rotating shaft (191), the outer rotating shaft (191) is rotatably mounted on both ends of the secondary distribution plate (151), the outer rotating shaft (191) is rotatably mounted with an outer swing arm (192), the outer swing arm (192) is connected to an outer sliding shaft (193), and a plurality of second sliding grooves (163) are arranged around both ends of the tertiary distribution plate (161), an outer sliding cover (194) is mounted on the second sliding groove (163), and the outer sliding shaft (193) is slidably mounted in the second sliding groove (163).

6. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 1, characterized in that: The magnets (154) mounted on the surface of the secondary distribution disc (151) are divided into two rows, and the two rows of magnets (154) are respectively distributed on the surface of the secondary distribution disc (151) with forward threads and reverse threads. The adsorption holes (165) provided on the oil film housing (164) are also divided into two rows, and the two rows of adsorption holes (165) are respectively distributed on the surface of the oil film housing (164) with forward threads and reverse threads.

7. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 6, characterized in that: The magnetic oil film adsorption structure comprises a rubber stretching film (173), which is fixedly mounted on the inner wall of one end of the adsorption hole (165) away from the three-stage distribution disc (161), and a stretching sheet (172) is fixedly mounted in the middle of the rubber stretching film (173).

8. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 7, characterized in that: The magnetic oil film adsorption structure comprises a magnetic slider (171), which is slidably mounted in an adsorption hole (165), the upper end of the magnetic slider (171) is connected to a stretching sheet (172), and the lower end of the magnetic slider (171) is provided with a spring (174), and the magnetic slider (171) can be magnetically adsorbed by a magnet (154).

9. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 1, characterized in that: The cylinder seal bearing includes a ball groove (141), and the ball groove (141) is arranged on the outer wall of the protrusion (133) at both ends of the first-stage distribution plate (131). The inner sides of the front guard plate (111) and the rear guard plate (113) are also provided with a groove. Balls (142) are filled between the groove of the front guard plate (111) or the groove of the rear guard plate (113) and the ball groove (141). The outer wall of the protrusion (133) at both ends of the first-stage distribution plate (131) is also installed with a sealing ring (143), and the sealing ring (143) is closely attached to the ball groove (141).

10. The plunger pump valve plate oil film support and cylinder sealing structure according to claim 1, characterized in that: The outer shell (112) and the rear guard plate (113) are sealed and welded together, the front guard plate (111) is fixedly mounted on one end of the outer shell (112) by means of bolts, a sealing strip is provided at the connection between the front guard plate (111) and the outer shell (112), and supporting oil is injected into the outer shell (112).

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