WO2017140188A1 - 柱塞无油高压泵 - Google Patents

柱塞无油高压泵 Download PDF

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Publication number
WO2017140188A1
WO2017140188A1 PCT/CN2017/000179 CN2017000179W WO2017140188A1 WO 2017140188 A1 WO2017140188 A1 WO 2017140188A1 CN 2017000179 W CN2017000179 W CN 2017000179W WO 2017140188 A1 WO2017140188 A1 WO 2017140188A1
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WO
WIPO (PCT)
Prior art keywords
plunger
sleeve
bearing
seat
connecting rod
Prior art date
Application number
PCT/CN2017/000179
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English (en)
French (fr)
Inventor
梁国富
Original Assignee
梁国富
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Filing date
Publication date
Application filed by 梁国富 filed Critical 梁国富
Publication of WO2017140188A1 publication Critical patent/WO2017140188A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/02—Packing the free space between cylinders and pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7809—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for needle roller bearings

Definitions

  • the invention belongs to the technical field of plunger pumps, and particularly relates to a plunger oil-free high pressure pump.
  • Applicant's prior patent ZL 200920188760.4 discloses a plunger oil-free high-pressure pump with a plunger pressurized by a pump shaft, an eccentric ring, a bearing, a connecting rod, a plunger, a plunger sleeve, and the like.
  • the structure, the plunger pressurization structure is: at least two connecting rods are arranged coaxially and parallel to each other on the pump main shaft, the connecting rod is fixed on the bearing, the bearing is fixed on the eccentric sleeve, and the eccentric sleeve is fixed on the On the pump main shaft, the other end of the connecting rod is hinged with the plunger, and the plunger is installed in the cavity of the pump body, and a self-lubricating plunger sleeve is arranged between the pump body and the plunger, at the end of the plunger and the pump head
  • the contact area is provided with sealing water ring and gasket.
  • the technology has the following defects: 1. By installing the eccentric sleeve on the main shaft to realize the reciprocating movement of the plunger, the eccentric sleeve will loosen after long-term operation, resulting in abnormal noise and wear;
  • the self-lubricating plunger sleeve is engineering plastic, and there is still the phenomenon of cracking and abrasion; 3.
  • the bearing between the connecting rod and the plunger is easy to be damaged; 4.
  • the spindle is mounted on the pump casing, based on the processing precision and the installation accuracy, There may be an inconsistency between the spindle rotation and the reciprocating motion of the plunger, that is, the centerline of the plunger and the centerline of the spindle are not perpendicular.
  • the object of the present invention is to provide a novel plunger oil-free high pressure pump which is simple in structure, safe and reliable.
  • the plunger oil-free high-pressure pump includes a pump casing, and the pump casing is provided with a plurality of plunger mechanisms driven by the main shaft and the main shaft, the plunger mechanism includes a plunger seat and a connecting rod, and one end of the connecting rod is an output end, and the connecting rod is The output end protrudes into the rear end of the plunger seat and is hinged with the plunger seat.
  • the front end of the plunger seat is provided with a plunger
  • the output end of the connecting rod is provided with a self-lubricating bearing mounting position
  • the bearing of the self-lubricating bearing mounting position is provided with a bearing.
  • a sleeve the center of the bearing sleeve is provided with a pin shaft, the two ends of the pin shaft extend out of the bearing sleeve and are mounted on the plunger seat, and a ceramic needle is densely wrapped between the circumference of the pin shaft and the inner wall of the bearing sleeve;
  • a retaining ring is respectively arranged on the pin shafts at both ends of the ceramic needle roller, and the retaining ring is interposed between the ceramic needle roller and the inner wall of the plunger seat and prevents the end surface of the ceramic needle roller from contacting the plunger seat.
  • An oil seal ring is disposed on the pin shaft outside the retaining ring, and an O-ring is disposed on a periphery of the oil seal ring, and the O-ring and the inner wall of the self-lubricating bearing mounting position are fitted.
  • the rear end of the plunger seat is provided with an inner hole, the output end of the connecting rod extends into the inner hole and is hinged in the middle of the plunger seat; the plunger seat is disposed on the plunger sleeve, and the plunger sleeve is fixedly mounted on the pump in vivo.
  • the front end and the rear section of the plunger seat are respectively provided with a step portion, and the step portion is provided with a guide sleeve, and the outer wall of the guide sleeve is slidably engaged with the inner wall of the plunger sleeve.
  • the main shaft is formed with a plurality of eccentric shaft portions, and the eccentric shaft portion is provided with a bearing; the other end of the connecting rod is a hoop sleeve, and the hoop sleeve is hung on the corresponding bearing by the locking bolt.
  • each segment has the same cross section, and the central portion of the eccentric shaft portion is recessed inward to form a ball groove, the ball groove is provided with a ball, the outer side of the ball groove is provided with a bearing outer ring of the positioning ball, and the outer ring of the bearing outer ring Bone set on the side frame.
  • the pump casing comprises a pump cover and a pump body, and the plunger mechanism is installed in a cylinder chamber of the pump body; a spindle mounting position is respectively arranged on the abutting surfaces of the pump cover and the left and right sides of the pump body; the main shaft is installed through the main bearings at both ends In the spindle mounting position, the front side of the pump cover is detachably provided with a locking cover.
  • a sealing assembly is arranged in the plunger chamber of the pump body, and the sealing assembly comprises more than one water seal, and an auxiliary sleeve is arranged between two adjacent water seals; one of the auxiliary sleeves is a recirculation auxiliary
  • the sleeve is circumferentially formed with a plurality of return through holes, and the pump body is provided with a drainage channel that is electrically connected to the return through hole, and the drainage channel is in communication with the water inlet passage of the pump body.
  • One of the auxiliary sleeves is a drainage auxiliary sleeve, and the drainage auxiliary sleeve has a plurality of drainage through holes formed in the circumferential direction, and the pump body is provided with a drainage passage which is electrically connected with the drainage through hole, and the drainage passage is connected with the outside of the pump body.
  • the specific structure of the rear end of the plunger is engaged with the plunger seat: a rear portion of the plunger is provided with a spring groove, and a spring is mounted in the spring groove, and the front end of the plunger seat is provided with a plunger insertion a card socket, wherein the card socket is provided with a limiting slot matched with the circlip;
  • a rear side of the plunger is provided with a bayonet slot, a spring is mounted in the bayonet slot, and a latch is connected to the outer end of the spring.
  • the front end of the plunger seat is provided with a card socket for inserting the plunger, and the card socket is provided with a limiting groove for engaging with the bayonet pin.
  • the eccentric shaft portion of the spindle of the present invention is formed by a plurality of sections, which replaces the eccentric sleeve structure in the conventional design, thereby avoiding the looseness of the eccentric sleeve after long-term operation, resulting in abnormal noise and wear.
  • the connecting rod of the invention passes through the end of the self-lubricating bearing and the plunger seat, and the self-lubricating bearing is composed of a bearing sleeve and a plurality of ceramic needles, which are compared with the ordinary bearing on the market (the conventional bearing has a positioning needle roller)
  • the plastic bushing is easy to crack after being used for a period of time), and has the advantages of simple structure, convenient assembly, safety and reliability.
  • the pin shafts at both ends of the ceramic needle roller of the present invention are respectively provided with a retaining ring which is interposed between the ceramic needle roller and the inner wall of the plunger seat and prevents the end surface of the ceramic needle roller from contacting the plunger seat.
  • the design makes the ceramic The needle does not contact the plunger, thereby preventing the ceramic needle from being pinched by the plunger seat, resulting in an increased overall service life.
  • the self-lubricating plunger sleeve of the present invention is a polyimide article which has excellent properties, thereby avoiding the disadvantage that the conventional engineering plastic is easy to crack and wear.
  • the connecting rod of the present invention is a tightening sleeve, and the tightening sleeve is hung on the corresponding bearing through a locking bolt installed at the front end thereof; the main shaft is mounted on the main shaft mounting position through the main bearing at both ends, and the front side of the pump cover Removably provided with a rear cover, this design allows the main shaft to be mounted on the pump casing during installation, and tightens the locking bolt through the window at the rear cover, thereby avoiding the traditional design.
  • the disadvantage that the center line of the plunger seat and the center line of the main shaft are not perpendicular can greatly improve the overall service life and avoid abnormal noise.
  • the pin shaft on the outer side of the retaining ring of the present invention is fixedly provided with an oil seal ring, the periphery of the oil seal ring is provided with an O-ring, the O-ring and the inner wall of the self-lubricating bearing mounting position are fitted, and the two oil seal rings are sealed.
  • this design eliminates the loss of grease on the ceramic needle roller and ensures the service life of the self-lubricating bearing.
  • the rear end of the plunger seat of the present invention is provided with an inner hole, the output end of the connecting rod extends into the inner hole and is hinged in the middle of the plunger seat; the plunger seat is disposed on the plunger sleeve, and the plunger sleeve is fixed Installed in the pump body; the output end of the connecting rod is hinged in the middle of the plunger seat to make the operation of the plunger seat more stable, and the transmission structure of the plunger seat and the connecting rod is further simplified.
  • the sealing assembly of the present invention can effectively prevent water in the plunger chamber from entering the cylinder chamber, and the design of the return auxiliary sleeve can be The effective interception causes the water in the plunger chamber to seep through the water seal, and the design of the drainage auxiliary sleeve can further intercept the water flow in the plunger chamber from seeping through the water seal.
  • the plunger and the plunger seat of the invention are engaged with each other, and the structure is simple, not easy to be separated, safe and reliable, and ensures stable operation of the whole machine.
  • Figure 1 is a schematic view of a plunger pump.
  • Figure 3 is one of the internal structural diagrams of the plunger pump.
  • Fig. 4 is an enlarged view of a portion A of Fig. 3.
  • Fig. 5 is a second schematic view showing the internal structure of the plunger pump.
  • Fig. 6 is an enlarged view of B of Fig. 5;
  • Figure 7 is an exploded perspective view of the plunger link transmission mechanism.
  • Figure 8 is a schematic view of a spindle.
  • Figure 9 is a schematic illustration of a spindle of another embodiment.
  • Figure 10 is one of the schematic views of the assembly of the main shaft and the bearing of another embodiment.
  • Figure 11 is a second schematic view of the assembly of the main shaft and the bearing of an embodiment.
  • Figure 12 is an exploded view of the prior application of the present invention.
  • Figure 13 is a schematic view of the cooperation of the spindle and plunger mechanism of the prior application of the present invention.
  • Figure 14 is an enlarged view of A of Figure 13 .
  • Figure 15 is an enlarged view of B of Figure 13 .
  • Figure 16 is a schematic view showing the cooperation of the self-lubricating bearing and the plunger holder of the prior application of the present invention.
  • Figure 17 is a schematic view showing the structure of the ceramic plunger of the prior application of the present invention.
  • Figure 18 is a schematic illustration of a spindle of the prior application of the present invention.
  • the plunger oil-free high-pressure pump includes a pump casing, and a plurality of plunger mechanisms driven by the main shaft 10 and the main shaft 10 are installed in the pump casing, which are four in the embodiment;
  • the plunger mechanism includes a plunger seat 18 and a connecting rod 8, One end of the rod is an output end 45, and the output end 45 of the connecting rod extends into the rear end of the plunger seat 18 and is hinged with the plunger seat 18.
  • the front end of the plunger seat is provided with a plunger 9, and the output end of the connecting rod 8
  • a self-lubricating bearing mounting position 40 is provided, and a bearing sleeve 14 is disposed in the self-lubricating bearing mounting position 40.
  • a pin shaft 20 is disposed in the center of the bearing sleeve 14, and both ends of the pin shaft 0 extend out of the bearing sleeve 14 and are mounted on the column.
  • a ceramic needle 13 is disposed between the circumference of the pin 20 and the inner wall of the bearing sleeve 14; the pin 20 of the ceramic needle 13 is respectively provided with a retaining ring 15 and the retaining ring 15 is disposed.
  • the end face of the ceramic needle roller 13 is prevented from contacting the plunger holder 18 between the ceramic needle roller 13 and the inner wall of the plunger holder 18.
  • the self-lubricating bearing is composed of a bearing sleeve and a plurality of ceramic needles.
  • the plastic bushing with the positioning needle roller in the traditional bearing it is easy to crack after using for a period of time
  • the ceramic needle does not touch the plunger, thus avoiding the ceramic needle being pinched by the plunger seat, so that the overall service life is enhanced.
  • the pin 20 on the outer side of the retaining ring 15 is provided with an oil seal ring 19, and the periphery of the oil seal ring 19 is provided with an O-ring 39, and the O-ring 39 is fitted to the inner wall of the self-lubricating bearing mounting position 40.
  • the two oil seal rings are sealed on both sides of the self-lubricating bearing mounting position. This design makes the grease on the ceramic needle roller not lost, ensuring the service life of the self-lubricating bearing.
  • An inner hole is disposed at a rear end of the plunger seat 18, and an output end of the connecting rod extends into the inner hole and is hinged in a middle portion of the plunger seat 18; the plunger seat 18 is disposed on the plunger sleeve 7, and the plunger sleeve 7 is fixedly mounted in the pump body 2.
  • the output end of the connecting rod is hinged in the middle of the plunger seat to make the operation of the plunger seat more stable, and the transmission structure of the plunger seat and the connecting rod is further simplified.
  • a front end portion and a rear portion of the plunger seat 18 are respectively provided with a step portion.
  • the stepped surface of the step portion is provided with an external thread.
  • the guide sleeve 17 is screwed on the step portion, and the outer wall of the guide sleeve 17 slides against the inner wall of the plunger sleeve 7.
  • Both the guide sleeve 17 and the plunger sleeve 7 can be made of stainless steel or ceramic parts or engineering plastic parts.
  • the plunger sleeve 7 is made of stainless steel
  • the guide sleeve 17 is made of engineering plastic parts.
  • the spindle is formed with a plurality of segments of eccentric shaft portions 52, 12, 49, 50, and the eccentric shaft portion is provided with a bearing; the other end of the connecting rod is a tightening sleeve 38, and the tightening sleeve 38 passes the locking bolt 21 hug on the corresponding bearing.
  • the eccentric shaft portion replaces the eccentric sleeve structure in the conventional design, thereby avoiding the looseness of the eccentric sleeve after long-term operation, resulting in abnormal noise and wear defects.
  • the connecting rod is mounted on the corresponding bearing by tightening, so that the cooperation between the bearing and the main shaft and between the bearing and the connecting rod is more precise.
  • the eccentric shaft portions 52, 12, 49, 50 of each segment have the same cross section; the eccentric shaft portions of the existing spindles are mostly designed with different eccentricities, and the matched bearings also have different specifications, resulting in weight on the spindle.
  • the distribution is uneven, the weight and inertia of each eccentric shaft are different, and the noise is large and the bearing will move after a long time of operation; therefore, the spring groove needs to be processed on the eccentric shaft portion, and the bearing is further positioned by the snap spring.
  • the circlip groove causes the shear resistance of the main shaft to decrease and the shaft life to decrease; the design of one of the main shafts of the present invention is as shown in Fig.
  • FIG. 8 the cross section of the eccentric shaft portions 52, 12, 49, 50 of each segment The same is true for the matched bearings, and the connecting rods are also the same. Therefore, when the spindle is running, the load on each eccentric shaft portion is exactly the same, which has the advantages of low noise and stable operation.
  • the utility model Another spindle design is shown in Fig. 9-10: the central portion of the axial surface of the eccentric shaft portion is recessed inwardly to form a ball groove 59.
  • the ball groove is provided with a ball 64.
  • the outer side of the ball groove is provided with a bearing outer ring 63 for positioning the ball 64, and the bearing
  • the frame 60 is disposed on both sides of the outer ring 64.
  • This design eliminates the design of the spring groove, and at the same time, fundamentally eliminates the problem of bearing displacement on the eccentric shaft portion, further improving the strength and service life of the spindle;
  • the design of the connecting rod with the hoop-tight connection on the bearing further facilitates the installation of the bearing.
  • the pump casing comprises a pump cover 3 and a pump body 2, and the plunger mechanism is installed in the cylinder chamber 84 of the pump body; the spindle mounting positions 55, 56 are respectively arranged on the abutting faces of the left and right sides of the pump cover 3 and the pump body 2.
  • the main shaft is mounted on the main shaft mounting positions 55, 56 through the main bearings 47, 48 at both ends, and the front side of the pump cover is detachably provided with a locking cover 51; the design is such that the main shaft is first mounted on the pump casing during installation.
  • the locking tool is tightened by the window at the rear door to avoid the disadvantage that the center line of the plunger seat and the center line of the main shaft are not perpendicular in the conventional design, and the overall use can be greatly improved. Life expectancy and avoid abnormal noise.
  • a sealing assembly 6 mated with the plunger 9 is disposed in the plunger chamber of the pump body, and the sealing assembly includes more than one water seal 36, 33, 30, 26, and is provided between two adjacent water seals.
  • the sleeve is 34, 32, 28, 25; one of the auxiliary sleeves is a return auxiliary sleeve 32, and the return auxiliary sleeve 32 is circumferentially formed with a plurality of return through holes 44, and the pump body is provided with a drainage passage 31 which is electrically connected to the return through holes.
  • the drain passage 31 communicates with the water inlet passage 5 of the pump body.
  • the design of the return assist sleeve effectively intercepts the water in the plunger chamber from seeping through the water seal.
  • the water seal of the invention is an engineering plastic part, and the inner edge of the water seal and the side wall of the plunger are attached and blocked.
  • the plunger is made of ceramic.
  • One of the auxiliary sleeves is a drainage auxiliary sleeve 28, and the drainage auxiliary sleeve 28 is circumferentially formed with a plurality of drainage through holes 43.
  • the pump body is provided with a drainage channel 27 that is electrically connected to the drainage through hole 43, the drainage channel 27 and the pump body exterior. Connected.
  • the drainage auxiliary sleeve is designed to further intercept the flow of water in the plunger chamber through the water seal.
  • a total of four water seals are provided, which completely eliminates the safety hazard of water in the plunger chamber entering the cylinder block.
  • a rear portion of the plunger 9 is provided with a spring groove, and a spring 16 is mounted in the spring groove 47, and the front end of the plunger seat is provided for a latching seat 57 inserted into the plunger, wherein the latching seat is provided with a limiting slot matched with the retaining spring;
  • the rear portion of the plunger 9 is provided with a bayonet slot
  • the spring pin 24 is mounted in the bayonet slot
  • the outer end of the spring 24 is connected with the bayonet pin 23
  • the front end of the plunger seat is provided with a latching seat 57 for inserting a plunger
  • a limiting slot for engaging with the bayonet is disposed in the latching seat.
  • the structure is simple, not easy to detach, safe and reliable, and ensures stable operation of the whole machine.
  • the plunger oil-free high pressure pump includes a pump casing, and a plurality of plunger mechanisms driven by a main shaft a41 and a main shaft a41 are mounted in the pump casing, and the main shaft a41 is mounted on the main shaft a41.
  • the eccentric shaft portion (three in the present embodiment, that is, the eccentric shaft portion Ia23; the eccentric shaft portion IIa24; the eccentric shaft portion IIIa25) is formed with a plurality of segments, and the eccentric shaft portion is provided with a bearing (ie, the bearing Ia17; the bearing IIa18) , bearing IIIa21), the bearing is fixed with a connecting rod with a plunger mechanism (ie, connecting rod IIIa7; connecting rod IIa8; connecting rod Ia9), the rear end of the connecting rod is provided with a self-lubricating bearing, and the connecting rod passes through the self-lubricating bearing The end of the plunger seat a5 is hinged.
  • the eccentric shaft portion of the spindle is formed on the main shaft of the invention, which replaces the eccentric sleeve structure in the conventional design, thereby avoiding the looseness of the eccentric sleeve after long-term operation, resulting in abnormal noise and wear defects;
  • the self-lubricating bearing is composed of an outer bearing sleeve a28, an inner bearing sleeve a30 and a plurality of ceramic needle rollers a29; the outer bearing sleeve a28 and the inner bearing sleeve a30 are arranged concentrically, and the outer bearing sleeve a28 and the inner bearing sleeve a30 are closely spaced.
  • the self-lubricating bearing has the advantages of simple structure, convenient assembly, safety and reliability compared with the ordinary bearing on the market (the plastic bushing with the positioning needle roller in the conventional bearing is easy to crack after using for a period of time).
  • the end of the connecting rod is inserted into the slot of the end of the plunger seat, and the end of the plunger seat at the slot is laterally provided with a hinge column, and the hinge column passes through the self-lubricating bearing at the end of the connecting rod and realizes the connection.
  • the movable connection of the rod and the plunger seat is inserted into the slot of the end of the plunger seat, and the end of the plunger seat at the slot is laterally provided with a hinge column, and the hinge column passes through the self-lubricating bearing at the end of the connecting rod and realizes the connection.
  • Both ends of the inner bearing sleeve a30 protrude from the outer bearing sleeve a28 and are respectively provided with a retaining ring a27, and the retaining ring a27 is interposed between the ceramic needle a29 and the plunger seat a5 and prevents the end surface of the ceramic needle from contacting the plunger seat.
  • the length of the outer bearing sleeve of the inner bearing sleeve is ⁇ the thickness of the retaining ring a27.
  • the retaining ring is free to rotate on the hinge post, which limits the range of movement of the ceramic needle. This design makes the ceramic needle not contact with the plunger seat, thereby avoiding the ceramic needle being pinched by the plunger seat, so that the overall service life is obtained. Enhanced.
  • the plunger seat is disposed in the self-lubricating plunger sleeve, the self-lubricating plunger sleeve is fixedly mounted in the pump casing, and the self-lubricating plunger sleeve is a polyimide workpiece. It has excellent properties, thus avoiding the disadvantage that traditional engineering plastics are prone to cracking.
  • the connecting rod is a tightening sleeve, and the tightening sleeve is hung on the corresponding bearing by a locking bolt mounted at the front end thereof; the rear side of the tightening sleeve extends to form a hinged end, and the inner hole of the hinged end is fixedly mounted
  • the self-lubricating bearing is a tightening sleeve, and the tightening sleeve is hung on the corresponding bearing by a locking bolt mounted at the front end thereof; the rear side of the tightening sleeve extends to form a hinged end, and the inner hole of the hinged end is fixedly mounted The self-lubricating bearing.
  • the pump casing comprises a pump cover and a pump body, and the plunger mechanism is installed in a cylinder chamber of the pump body; a spindle mounting position is respectively arranged on the abutting surfaces of the pump cover and the left and right sides of the pump body; the main shaft is installed through the main bearings at both ends On the spindle mounting position, the front side of the pump cover is detachably provided with a rear door.
  • the design allows the spindle to be mounted on the pump casing during installation, and the locking tool is tightened by the window at the rear cover to avoid the center line and the spindle of the plunger seat in the conventional design.
  • the shortcoming of the center line is not vertical, which can greatly improve the overall service life and avoid abnormal noise.
  • the front end of the plunger seat a5 is mounted with a stud a34, and the stud a34 is provided with a ceramic plunger a33.
  • the inner end of the ceramic plunger a33 extends into the groove at the front end of the plunger seat a5 and fits the groove wall surface;
  • the outer end of the plug a33 is provided with a sealing end cap a36.
  • the contact surface of the ceramic plunger a33 and the sealing end cap a36 is provided with a sealing ring a35, and the inner side of the middle portion of the sealing end cap projects into the ceramic plunger and is connected with the stud
  • the a34 is screwed. This design prevents the water pressure in the cylinder a37 from entering through the outer end of the ceramic plunger a33 when the plunger is moved, thereby preventing the ceramic plunger a33 from bursting under the action of water pressure.
  • the present application is further modified on the basis of this, further improving the stability of the plunger pump.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Reciprocating Pumps (AREA)
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Abstract

一种柱塞无油高压泵，包括泵壳，泵壳内安装有主轴（10）和主轴（10）带动的若干个柱塞机构，柱塞机构包括柱塞座（18）和连杆（8），连杆（8）一端为输出端（45），连杆（8）的输出端（45）伸入柱塞座（18）后端并与柱塞座（18）铰接，柱塞座（18）的前端设置有柱塞（9），连杆（8）的输出端（45）设置有自润滑轴承安装位（40），自润滑轴承安装位（40）内设置有轴承套（14），轴承套（14）的中央穿设有一根销轴（20），销轴（20）的两端伸出轴承套（14）并安装在柱塞座（18）上，销轴（20）周侧和轴承套（14）内壁之间密布有一圈的陶瓷滚针（13），陶瓷滚针（13）两端的销轴（20）上分别套装有挡圈（15），挡圈（15）夹设在陶瓷滚针（13）和柱塞座（18）内壁之间并阻止陶瓷滚针（13）的端面接触柱塞座（18）。该柱塞无油高压泵运行稳定、使用寿命长、噪声低。

Description

柱塞无油高压泵 技术领域
本发明属于柱塞泵技术领域，特指一种柱塞无油高压泵。
背景技术
申请人的一份在先专利ZL 200920188760.4公开了一种柱塞无油高压泵，泵体内安装有由泵轴、偏心圈、轴承、连杆、柱塞、柱塞套等带动的柱塞增压结构，柱塞增压结构为：至少有二根连杆间隔且相互平行地同轴设置在泵主轴上，所述连杆固设在轴承上，轴承固设在偏心套上，偏心套固定在泵主轴上，连杆的另一端与柱塞铰接，柱塞安装在泵体的空腔内，在泵体和柱塞之间设有自润滑柱塞套，在柱塞的端部与泵头的接触处设有封水圈及垫片，优点是：结构简单、无污染、高压力、高效率、使用寿命长。
申请人在生产销售的过程中，发现该技术存在以下缺陷：1、通过在主轴上安装偏心套实现柱塞的往返运动，偏心套在长时间运行之后会产生松动，导致异响和磨损；2、自润滑柱塞套为工程塑料，还是存在开裂和磨损的现象；3、连杆和柱塞之间的轴承容易损坏；4、将主轴安装在泵壳上时，基于加工精度和安装精度，主轴转动和柱塞的往复运动可能会存在不协调，即柱塞的中心线和主轴的中心线不垂直。
发明内容
本发明的目的是提供一种结构简单，安全可靠的新型的柱塞无油高压泵。
本发明的目的是这样实现的：
柱塞无油高压泵，包括泵壳，泵壳内安装有主轴和主轴带动的若干个柱塞机构，柱塞机构包括柱塞座和连杆，连杆一端为输出端，所述连杆的输出端伸入柱塞座后端并与柱塞座铰接，柱塞座的前端设置有柱塞，所述连杆的输出端设置有自润滑轴承安装位，自润滑轴承安装位内设置有轴承套，轴承套的中央穿设有一根销轴，销轴的两端伸出轴承套并安装在柱塞座上，销轴周侧和轴承套内壁之间密布有一圈的陶瓷滚针；所述陶瓷滚针两端的销轴上分别套装有挡圈，挡圈夹设在陶瓷滚针和柱塞座内壁之间并阻止陶瓷滚针的端面接触柱塞座。
所述挡圈外侧的销轴上套装有油封环，所述油封环的周缘设置有O形圈，O形圈和自润滑轴承安装位的内壁贴合。
所述柱塞座后端设置有内孔，连杆的输出端伸入内孔并铰接在柱塞座的中部；所述柱塞座穿设在柱塞套上，柱塞套固定安装在泵体内。
所述柱塞座的前端和后段均设置有台阶部，台阶部套装有导套，导套的外壁与柱塞套内壁滑动配合。
所述主轴上成型有若干段的偏心轴部，偏心轴部上均套装有轴承；所述连杆的另一端为箍紧套，箍紧套通过锁紧螺栓抱紧在对应的轴承上。
每一段的偏心轴部的横截面均相同，偏心轴部的轴面中部向内凹陷形成滚珠槽，滚珠槽内设置有滚珠，滚珠槽外侧套装有定位滚珠的轴承外圈，轴承外圈的两侧设置有骨 架。
所述泵壳包括泵盖和泵体，柱塞机构安装在泵体内的缸室中；泵盖和泵体左、右两侧的对接面上分别设置主轴安装位；主轴通过两端的主轴承安装在主轴安装位上，泵盖的前侧可拆卸地设置有锁紧盖。
所述泵体内的柱塞腔中设置有与所述柱塞配合的密封组件，密封组件包括一道以上的水封，相邻两道水封之间设置有辅套；其中一个辅套为回流辅套，回流辅套的周向成型有若干个回流通孔，泵体上设置有与回流通孔导通的引流通道，引流通道与泵体的进水通道连通。
其中一个辅套为排水辅套，排水辅套的周向成型有若干个排水通孔，泵体上设置有与排水通孔导通的排水通道，排水通道与泵体外部连通。
所述柱塞的后端与柱塞座卡接的具体结构是：柱塞的后部设置有卡簧槽，卡簧槽内安装有卡簧，所述柱塞座前端设置有供柱塞插入的卡接座，卡接座内设置有与卡簧配合的限位槽；
或，所述柱塞的后端与柱塞座卡接的具体结构是：柱塞的后部设置有卡销槽，卡销槽内安装有弹簧，弹簧的外端连接有卡销，所述柱塞座前端设置有供柱塞插入的卡接座，卡接座内设置有与卡销配合的限位槽。
本发明相比现有技术突出且有益的技术效果是：
1、本发明的主轴上成型有若干段的偏心轴部，取代了传统设计中的偏心套结构，从而避免了偏心套在长时间运行之后会产生松动，导致异响和磨损的缺陷。
2、本发明的连杆通过自润滑轴承与柱塞座的端部，自润滑轴承由轴承套和若干个陶瓷滚针组成，其相比市面上的普通轴承(传统的轴承内有定位滚针的塑料衬套，其使用一段时间后容易开裂)，具有结构简单，组装方便，安全可靠的优点。
3、本发明的陶瓷滚针两端的销轴上分别套装有挡圈，挡圈夹设在陶瓷滚针和柱塞座内壁之间并阻止陶瓷滚针的端面接触柱塞座，该设计使得陶瓷滚针不会接触柱塞，从而避免了陶瓷滚针被柱塞座卡断，使得整体的使用寿命得到增强。
4、本发明的自润滑柱塞套为聚酰亚胺制件，其具有优异的性能，从而避免了传统工程塑料容易开裂和磨损的缺点。
5、本发明的连杆为箍紧套，箍紧套通过安装在其前端的锁紧螺栓抱紧在对应的轴承上；主轴通过两端的主轴承安装在主轴安装位上，泵盖的前侧可拆卸地设置有后挡盖，该设计使得安装时，先将主轴安装在泵壳上，在将锁紧工具通过后挡盖处的窗口进行旋紧锁紧螺栓，从而可以避免传统的设计中，柱塞座的中心线和主轴的中心线不垂直的缺点，可以大大的提高整体的使用寿命，避免异响。
6、本发明的挡圈外侧的销轴上固定套装有油封环，所述油封环的周缘设置有O形圈，O形圈和自润滑轴承安装位的内壁贴合，两个油封环封堵在自润滑轴承安装位的两侧，该设计使得陶瓷滚针上的油脂不会流失，确保自润滑轴承的使用寿命。
7、本发明的柱塞座后端设置有内孔，连杆的输出端伸入内孔并铰接在柱塞座的中部；所述柱塞座穿设在柱塞套上，柱塞套固定安装在泵体内；连杆的输出端铰接在柱塞座的中部使得柱塞座的运行更为稳定，也进一步精简了柱塞座和连杆的传动结构。
8、本发明的密封组件能够有效的防止柱塞腔中的水进入缸室，回流辅套的设计能 够有效拦截使得柱塞腔中的水渗过水封，排水辅套的设计能够进一步拦截柱塞腔中的水流渗过水封。
9、本发明的柱塞和柱塞座卡接，其结构简单，不易脱离，安全可靠，确保了整机的稳定运行。
附图说明
图1是柱塞泵的示意图。
图2是柱塞泵的部件分解图。
图3是柱塞泵的内部结构示意图之一。
图4是图3的A处放大图。
图5是柱塞泵的内部结构示意图之二。
图6是图5的B放大图。
图7是柱塞连杆传动机构的部件分解图。
图8是主轴的示意图。
图9是另一实施例的主轴示意图。
图10是另一实施例的主轴和轴承装配示意图之一。
图11是是一实施例的主轴和轴承装配示意图之二。
图12是本发明的在先申请的部件分解图。
图13是本发明的在先申请的主轴和柱塞机构配合示意图。
图14是图13的A处放大图。
图15是图13的B处放大图。
图16是本发明的在先申请的自润滑轴承和柱塞座的配合示意图。
图17是本发明的在先申请的陶瓷柱塞防胀裂的结构示意图。
图18是本发明的在先申请的主轴的示意图。
图中：1-输入法兰；2-泵体；3-泵盖；4-出水通道；5-进水通道；6-密封组件；7-柱塞套；8-连杆；9-柱塞；10-主轴；11-轴承；12-偏心轴部；13-陶瓷滚针；14-轴承套；15-内挡圈；16-卡簧；17-导套；18-柱塞座；19-外挡圈；20-销轴；21-锁紧螺栓；22-轴承；23-卡销；24-弹簧；25-辅套；26-水封；27-排水通道；28-排水辅套；29-密封圈；30-水封；31-引流通道；32-回流辅套；33-次级主水封；34-辅套；35-密封圈；36-主水封；37-回流槽；38-箍紧套；39-O形圈；40-自润滑轴承安装位；41-销轴孔位；42-排水槽；43-排水通孔；44-回流通孔；45-输出端；46-箍紧部；47-主轴承；48-主轴承；49-偏心轴部；50-偏心轴部；51-后盖；52-偏心轴部；53-泵头；54-缸室；55-主轴安装位；56-主轴安装位；57-卡接座；58-卡簧槽；59-滚珠槽；60-骨架；61-挡圈；62-偏心轴部；63-轴承外圈；64-滚珠；
a1-泵体；a2-主轴安装位；a3-主轴安装位；a4-自润滑柱塞套；a5-柱塞座；a6-主轴承I；a7-连杆III；a8-连杆II；a9-连杆I；a10-输入法兰；a11-主轴承II；a12-锁紧螺栓；a13-主轴安装位；a14-泵盖；a15-后挡盖；a16-卡簧I；a17-轴承I；a18-轴承II；a19-卡簧II；a20-锁紧螺栓；a21-轴承III；a22-卡簧III；a23-偏心轴部I；a24-偏心轴部II；a25-偏心轴部III；a26-锁紧端；a27-挡圈；a28-外轴承套；a29-陶瓷滚针；a30-内轴承套；a31-铰接柱；a32-挡圈；a33-陶瓷柱塞；a34-螺杆；a35-密封圈；a36-密 封端盖；a37-缸体；a38-主轴承II安装部；a39-卡簧槽I；a40-轴承I安装部；a41-主轴；a42-轴承II安装部；a43-卡簧槽II；a44-轴承III安装部；a45-卡簧槽III；a46-主轴承I安装部。
具体实施方式
下面结合附图以具体实施例对本发明作进一步描述：
柱塞无油高压泵，包括泵壳，泵壳内安装有主轴10和主轴10带动的若干个柱塞机构，本实施例为4个；柱塞机构包括柱塞座18和连杆8，连杆一端为输出端45，所述连杆的输出端45伸入柱塞座18后端并与柱塞座18铰接，柱塞座的前端设置有柱塞9，所述连杆8的输出端设置有自润滑轴承安装位40，自润滑轴承安装位40内设置有轴承套14，轴承套14的中央穿设有一根销轴20，销轴0的两端伸出轴承套14并安装在柱塞座18上，销轴20周侧和轴承套14内壁之间密布有一圈的陶瓷滚针13；所述陶瓷滚针13两端的销轴20上分别套装有挡圈15，挡圈15夹设在陶瓷滚针13和柱塞座18内壁之间并阻止陶瓷滚针13的端面接触柱塞座18。自润滑轴承由轴承套和若干个陶瓷滚针组成，其相比市面上的普通轴承(传统的轴承内有定位滚针的塑料衬套，其使用一段时间后容易开裂)，具有结构简单，组装方便，安全可靠的优点，陶瓷滚针不会接触柱塞，从而避免了陶瓷滚针被柱塞座卡断，使得整体的使用寿命得到增强。
所述挡圈15外侧的销轴20上套装有油封环19，所述油封环19的周缘设置有O形圈39，O形圈39和自润滑轴承安装位40的内壁贴合。两个油封环封堵在自润滑轴承安装位的两侧，该设计使得陶瓷滚针上的油脂不会流失，确保自润滑轴承的使用寿命。
所述柱塞座18后端设置有内孔，连杆的输出端伸入内孔并铰接在柱塞座18的中部；所述柱塞座18穿设在柱塞套7上，柱塞套7固定安装在泵体2内。连杆的输出端铰接在柱塞座的中部使得柱塞座的运行更为稳定，也进一步精简了柱塞座和连杆的传动结构。
所述柱塞座18的前端和后段均设置有台阶部，台阶部的台阶面上设置有外螺纹，导套17旋设在台阶部上，导套17的外壁与柱塞套7内壁滑动配合。导套17和柱塞套7均可以采用不锈钢制件或陶瓷制件或工程塑料制件，本实施例中，柱塞套7采用不锈钢制件，导套17采用工程塑料制件。
所述主轴上成型有若干段的偏心轴部52，12，49，50，偏心轴部上均套装有轴承；所述连杆的另一端为箍紧套38，箍紧套38通过锁紧螺栓21抱紧在对应的轴承上。偏心轴部取代了传统设计中的偏心套结构，从而避免了偏心套在长时间运行之后会产生松动，导致异响和磨损的缺陷。同时，连杆采用箍紧的的方式安装在对应的轴承上，使得轴承和主轴之间、轴承和连杆之间的配合更为精确。
每一段的偏心轴部52，12，49，50的横截面均相同；现有的主轴的偏心轴部大多采用不同偏心距的设计，其匹配的轴承也具有不同的规格，导致主轴上的重量分布不均匀，各偏心轴部的重量和惯性不同，噪声较大且长时间运转之后，轴承会发生移动；因此，需要在偏心轴部上加工出卡簧槽，通过卡簧来进一步定位轴承，然而，卡簧槽会导致主轴的抗剪切力下降，轴寿命降低；本实用新型的其中一主轴的设计如图8所示：每一段的偏心轴部52，12，49，50的横截面均相同，匹配的轴承也采用相同的规格，连杆也相同，因此，主轴运转时，每一段偏心轴部承担的负荷是完全相同的，其具有噪声低，运行稳定的优点。本实用新型的 另一主轴设计如图9-10所示：偏心轴部的轴面中部向内凹陷形成滚珠槽59，滚珠槽内设置有滚珠64，滚珠槽外侧套装有定位滚珠64的轴承外圈63，轴承外圈64的两侧设置有骨架60，该设计取消了卡簧槽的设计，同时，从根本上杜绝了偏心轴部上的轴承移位问题，进一步提高了主轴的强度和使用寿命；另外，连杆采用箍紧式连接在轴承上的设计也进一步简便了轴承的安装。
所述泵壳包括泵盖3和泵体2，柱塞机构安装在泵体内的缸室84中；泵盖3和泵体2左、右两侧的对接面上分别设置主轴安装位55，56；主轴通过两端的主轴承47，48安装在主轴安装位55，56上，泵盖的前侧可拆卸地设置有锁紧盖51；该设计使得安装时，先将主轴安装在泵壳上，在将锁紧工具通过后挡盖处的窗口进行旋紧锁紧螺栓，从而可以避免传统的设计中，柱塞座的中心线和主轴的中心线不垂直的缺点，可以大大的提高整体的使用寿命，避免异响。
所述泵体内的柱塞腔中设置有与所述柱塞9配合的密封组件6，密封组件包括一道以上的水封36，33，30，26，相邻两道水封之间设置有辅套34，32，28，25；其中一个辅套为回流辅套32，回流辅套32的周向成型有若干个回流通孔44，泵体上设置有与回流通孔导通的引流通道31，引流通道31与泵体的进水通道5连通。回流辅套的设计能够有效拦截使得柱塞腔中的水渗过水封。本发明的水封为工程塑料制件，水封的内缘和柱塞侧壁贴合并阻水。柱塞为陶瓷制件。
其中一个辅套为排水辅套28，排水辅套28的周向成型有若干个排水通孔43，泵体上设置有与排水通孔43导通的排水通道27，排水通道27与泵体外部连通。排水辅套的设计能够进一步拦截柱塞腔中的水流渗过水封。
本实施例中共设置有四道水封，其彻底杜绝了柱塞腔中的水进入缸体的安全隐患。
所述柱塞的后端与柱塞座卡接的具体结构是：柱塞9的后部设置有卡簧槽，卡簧槽47内安装有卡簧16，所述柱塞座前端设置有供柱塞插入的卡接座57，卡接座内设置有与卡簧配合的限位槽；
或，所述柱塞的后端与柱塞座卡接的具体结构是：柱塞9的后部设置有卡销槽，卡销槽内安装有弹簧24，弹簧24的外端连接有卡销23，所述柱塞座前端设置有供柱塞插入的卡接座57，卡接座内设置有与卡销配合的限位槽。其结构简单，不易脱离，安全可靠，确保了整机的稳定运行。本实施例中，还可以进一步在柱塞装配时，先沾上胶体，再卡装入柱塞座，进一步确保柱塞的稳定。
本发明的一份在先申请如图9-15所示，柱塞无油高压泵，包括泵壳，泵壳内安装有主轴a41和主轴a41带动的若干个柱塞机构，所述主轴a41上成型有若干段的偏心轴部(本实施例为3个，即，偏心轴部Ia23；偏心轴部IIa24；偏心轴部IIIa25)，偏心轴部上均套装有轴承(即，轴承Ia17；轴承IIa18，轴承IIIa21)，轴承上分别固定套装有柱塞机构的连杆(即，连杆IIIa7；连杆IIa8；连杆Ia9)，连杆后端设置有自润滑轴承，连杆通过自润滑轴承与柱塞座a5的端部铰接。本发明的主轴上成型有若干段的偏心轴部，取代了传统设计中的偏心套结构，从而避免了偏心套在长时间运行之后会产生松动，导致异响和磨损的缺陷；
所述自润滑轴承由外轴承套a28、内轴承套a30和若干个陶瓷滚针a29组成；所述外轴承套a28和内轴承套a30同心布置，外轴承套a28和内轴承套a30之间密布有一圈的所述陶 瓷滚针a29，外轴承套和内轴承套为轴承钢制件。自润滑轴承相比市面上的普通轴承(传统的轴承内有定位滚针的塑料衬套，其使用一段时间后容易开裂)，具有结构简单，组装方便，安全可靠的优点。
所述连杆的端部是伸入柱塞座端部的开槽内，开槽处的柱塞座端部横向设置有铰接柱，铰接柱穿过连杆端部的自润滑轴承并实现连杆和柱塞座的活动连接。
所述内轴承套a30的两端伸出外轴承套a28并分别套装有挡圈a27，挡圈a27夹设在陶瓷滚针a29和柱塞座a5之间并阻止陶瓷滚针的端面接触柱塞座，所述内轴承套的伸出外轴承套的长度≥挡圈a27的厚度。挡圈在铰接柱上自由转动，限制了陶瓷滚针的活动范围，该设计使得陶瓷滚针不会接触柱塞座，从而避免了陶瓷滚针被柱塞座卡断，使得整体的使用寿命得到增强。
所述柱塞座穿设在自润滑柱塞套内，自润滑柱塞套固定安装在泵壳内，自润滑柱塞套为聚酰亚胺制件。其具有优异的性能，从而避免了传统工程塑料容易开裂的缺点。
所述连杆为箍紧套，箍紧套通过安装在其前端的锁紧螺栓抱紧在对应的轴承上；所述箍紧套后侧的延伸形成铰接端，铰接端的内孔上固定安装有所述自润滑轴承。所述泵壳包括泵盖和泵体，柱塞机构安装在泵体内的缸室中；泵盖和泵体左、右两侧的对接面上分别设置主轴安装位；主轴通过两端的主轴承安装在主轴安装位上，泵盖的前侧可拆卸地设置有后挡盖。
该设计使得安装时，先将主轴安装在泵壳上，在将锁紧工具通过后挡盖处的窗口进行旋紧锁紧螺栓，从而可以避免传统的设计中，柱塞座的中心线和主轴的中心线不垂直的缺点，可以大大的提高整体的使用寿命，避免异响。
柱塞座a5的前端安装有螺柱a34，螺柱a34上套装有陶瓷柱塞a33，陶瓷柱塞a33的内端伸入柱塞座a5前端的凹槽内并贴合凹槽壁面；陶瓷柱塞a33的外端设置有密封端盖a36，陶瓷柱塞a33和密封端盖a36的接触面上设置有密封圈a35，密封端盖的中部的内侧伸入陶瓷柱塞内并与所述螺柱a34旋接，该设计使得柱塞活动时，缸体a37内的水压不能通过陶瓷柱塞a33的外端进入其内，从而避免了陶瓷柱塞a33在水压的作用下胀裂。
本申请在此基础上进一步修改，进一步提高了柱塞泵的稳定性。
上述实施例仅为本发明的较佳实施例，并非依此限制本发明的保护范围，故：凡依本发明的结构、形状、原理所做的等效变化，均应涵盖于本发明的保护范围之内。

Claims (10)

  1. 柱塞无油高压泵，其特征在于，包括泵壳，泵壳内安装有主轴和主轴带动的若干个柱塞机构，柱塞机构包括柱塞座和连杆，连杆一端为输出端，所述连杆的输出端伸入柱塞座后端并与柱塞座铰接，柱塞座的前端设置有柱塞，所述连杆的输出端设置有自润滑轴承安装位，自润滑轴承安装位内设置有轴承套，轴承套的中央穿设有一根销轴，销轴的两端伸出轴承套并安装在柱塞座上，销轴周侧和轴承套内壁之间密布有一圈的陶瓷滚针；所述陶瓷滚针两端的销轴上分别套装有挡圈，挡圈夹设在陶瓷滚针和柱塞座内壁之间并阻止陶瓷滚针的端面接触柱塞座。
  2. 根据权利要求1所述的柱塞无油高压泵，其特征在于，所述挡圈外侧的销轴上套装有油封环，所述油封环的周缘设置有O形圈，O形圈和自润滑轴承安装位的内壁贴合。
  3. 根据权利要求1所述的柱塞无油高压泵，其特征在于，所述柱塞座后端设置有内孔，连杆的输出端伸入内孔并铰接在柱塞座的中部；所述柱塞座穿设在柱塞套上，柱塞套固定安装在泵体内。
  4. 根据权利要求3所述的柱塞无油高压泵，其特征在于，所述柱塞座的前端和后段均设置有台阶部，台阶部套装有导套，导套的外壁与柱塞套内壁滑动配合。
  5. 根据权利要求1所述的柱塞无油高压泵，其特征在于，所述主轴上成型有若干段的偏心轴部，偏心轴部上均套装有轴承；所述连杆的另一端为箍紧套，箍紧套通过锁紧螺栓抱紧在对应的轴承上。
  6. 根据权利要求5所述的柱塞无油高压泵，其特征在于，每一段的偏心轴部的横截面均相同，偏心轴部的轴面中部向内凹陷形成滚珠槽，滚珠槽内设置有滚珠，滚珠槽外侧套装有定位滚珠的轴承外圈，轴承外圈的两侧设置有骨架。
  7. 根据权利要求1所述的柱塞无油高压泵，其特征在于，所述泵壳包括泵盖和泵体，柱塞机构安装在泵体内的缸室中；泵盖和泵体左、右两侧的对接面上分别设置主轴安装位；主轴通过两端的主轴承安装在主轴安装位上，泵盖的前侧可拆卸地设置有锁紧盖。
  8. 根据权利要求1所述的柱塞无油高压泵，其特征在于，所述泵体内的柱塞腔中设置有与所述柱塞配合的密封组件，密封组件包括一道以上的水封，相邻两道水封之间设置有辅套；其中一个辅套为回流辅套，回流辅套的周向成型有若干个回流通孔，泵体上设置有与回流通孔导通的引流通道，引流通道与泵体的进水通道连通。
  9. 根据权利要求8所述的柱塞无油高压泵，其特征在于，其中一个辅套为排水辅套，排水辅套的周向成型有若干个排水通孔，泵体上设置有与排水通孔导通的排水通道，排水通道与泵体外部连通。
  10. 根据权利要求1所述的柱塞无油高压泵，其特征在于，所述柱塞的后端与柱塞座卡接的具体结构是：柱塞的后部设置有卡簧槽，卡簧槽内安装有卡簧，所述柱塞座前端设置有供柱塞插入的卡接座，卡接座内设置有与卡簧配合的限位槽；
    或，所述柱塞的后端与柱塞座卡接的具体结构是：柱塞的后部设置有卡销槽，卡销槽内安装有弹簧，弹簧的外端连接有卡销，所述柱塞座前端设置有供柱塞插入的卡接座，卡接座内设置有与卡销配合的限位槽。
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