CN211116443U

CN211116443U - Radial plunger pump convenient to maintain

Info

Publication number: CN211116443U
Application number: CN201922129126.XU
Authority: CN
Inventors: 任磊石
Original assignee: Wuxi Shengrui Machinery Electronic Co ltd
Current assignee: Wuxi Shengrui Machinery Electronic Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-07-28
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a radial plunger pump convenient for maintenance, which comprises a pump shell component, a rotating shaft, an eccentric wheel arranged on the rotating shaft and a plunger component arranged in the pump shell component; the pump shell assembly comprises an oil inlet shell and a sealing pump cover covered on the oil inlet shell, an oil inlet is formed in the oil inlet shell, and a sealing assembly used for sealing a gap between the oil inlet shell and the sealing pump cover is arranged between the oil inlet shell and the sealing pump cover; the plunger assembly comprises a cylinder body, a plunger connected with the cylinder body in a sliding manner and a return spring used for pushing the plunger to reset, an oil suction hole communicated with the inside of the cylinder body and an oil pressing hole used for supplying and discharging oil are formed in the cylinder body, an oil suction one-way valve is arranged in the oil suction hole, and an oil pressing one-way valve is arranged in the oil pressing hole; an oil collecting plate is arranged in the oil inlet shell, an oil collecting hole communicated with the oil pressing hole is formed in the oil collecting plate, an output port communicated with the oil collecting hole is formed in the oil collecting plate, and an output butt joint assembly used for being in butt joint with a pipeline is arranged at the output port. The utility model discloses have the dismouting of being convenient for and maintain and the better effect of sealing performance.

Description

Radial plunger pump convenient to maintain

Technical Field

The utility model relates to a radial plunger pump especially relates to a radial plunger pump convenient to maintain.

Background

The radial plunger pump is a common mode for providing power for a system in a large hydraulic machine, has the advantages of high output pressure, large displacement, high volumetric efficiency, long service life and the like, and is widely applied to hydraulic systems in the fields of forging, metallurgy, ships and the like.

At present, the invention patent of chinese patent No. CN104234965B discloses an integrated radial plunger pump with a permanent magnet disc type motor driving double-row plungers, which includes a pump housing, two cams with 180 ° difference in eccentric direction are installed in the pump housing side by side, the outer side of the cams are compressed by a positioning sleeve, radial grooves for winding stator windings are processed on the inner side of a pump end cover, a port shaft is fixed in the pump housing, a rotor is supported on the port shaft through a rolling bearing, radial grooves for installing permanent magnets are processed on both sides of the rotor, two rows of plunger holes are formed in the outer wall surface of the rotor in parallel and are uniformly distributed along the radial direction of the rotor, a plunger is installed in each plunger hole, a connecting rod slipper is installed on the plunger, the bottom of the connecting rod slipper is pressed in the cam, and two sides in the pump form a permanent magnet disc type motor.

The existing integrated radial plunger pump is convenient to manufacture and maintain, a pump shell is often made into multiple parts, but the joints of the multiple parts of the shell are difficult to seal well; in order to improve the sealing effect, the number of joints on the pump shell is reduced as much as possible, but the maintenance is troublesome; it is desirable to provide a radial piston pump that is easy to maintain and has a good sealing effect.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a radial plunger pump convenient to dismouting is maintained and sealing performance is better.

The above object of the present invention is achieved by the following technical solutions: a radial plunger pump convenient for maintenance comprises a pump shell assembly, a rotating shaft, an eccentric wheel arranged on the rotating shaft and a plunger assembly arranged in the pump shell assembly;

the pump shell assembly comprises an oil inlet shell and a sealing pump cover which is covered on the oil inlet shell, an oil inlet is formed in the oil inlet shell, and a sealing assembly for sealing a gap between the oil inlet shell and the sealing pump cover is arranged between the oil inlet shell and the sealing pump cover;

the plunger assembly comprises a cylinder body, a plunger connected with the cylinder body in a sliding manner and a return spring used for pushing the plunger to reset, an oil suction hole communicated with the inside of the cylinder body and an oil pressing hole used for supplying and discharging oil are formed in the cylinder body, an oil suction one-way valve is arranged in the oil suction hole, and an oil pressing one-way valve is arranged in the oil pressing hole;

an oil collecting plate is arranged in the oil inlet shell, an oil collecting hole communicated with the oil pressing hole is formed in the oil collecting plate, an output port communicated with the oil collecting hole is formed in the oil collecting plate, and an output butt joint assembly used for being in butt joint with a pipeline is arranged at the output port.

By adopting the technical scheme, the oil inlet shell and the sealing pump cover are used for accommodating the plunger assembly and the eccentric wheel, so that the pump shell assembly is integrally provided with only two parts, the disassembly is convenient, the connecting position is small, and the sealing difficulty is reduced; the sealing assembly is used for plugging a gap between the oil inlet shell and the sealing pump cover, so that oil leakage is well avoided; the plunger assembly is used for absorbing and pressing oil, the oil collecting plate is used for collecting the oil pressed by the plunger assembly together so as to intensively press the oil out, and the oil collecting plate is independently arranged so as to be convenient for taking the oil collecting plate out of the oil inlet shell, so that the assembly, disassembly and processing are more convenient, and the maintenance of the whole pump body is convenient; the butt joint assembly is used for communicating the output port on the oil collecting plate with an external oil conveying pipe, so that the radial plunger pump is more convenient to use. The eccentric wheel is used for pushing the plunger to slide, and the reset spring is used for resetting the plunger, so that the plunger can stably reciprocate, and oil absorption and oil pressing can be well realized.

The present invention may be further configured in a preferred embodiment as: the sealing assembly comprises a sealing groove and a sealing rubber ring, the sealing groove is formed in one end, facing the sealing pump cover, of the oil inlet shell, and the sealing rubber ring is embedded in the sealing groove; the oil inlet shell is provided with a positioning convex ring extending outwards towards the inner side edge of one end of the sealing pump cover, and the sealing pump cover is provided with a positioning groove matched with the positioning convex ring.

By adopting the technical scheme, the sealing groove is used for placing the sealing rubber ring, so that the sealing rubber ring is placed more stably, and the sealing rubber ring is used for being abutted against the oil inlet shell and the sealing pump cover, so that a gap between the oil inlet shell and the sealing pump cover is better blocked, and oil leakage is better avoided; the positioning convex ring is matched with the positioning groove, so that the oil inlet shell and the sealing pump cover can be matched more stably and accurately, and the oil inlet shell and the sealing pump cover are more convenient to install.

The present invention may be further configured in a preferred embodiment as: the sealing pump cover extends towards the direction of the oil inlet shell towards the outer side of one end of the oil inlet shell to form a sealing baffle ring, and the inner side wall of the sealing baffle ring is abutted to the sealing rubber ring.

By adopting the technical scheme, the position of the sealing rubber ring can be better limited by the sealing baffle ring, so that the sealing rubber ring can better block a gap between the oil inlet shell and the sealing pump cover, and a sealing effect is better achieved; and the sealing baffle ring is abutted against the sealing rubber ring, so that the sealing effect can be achieved, and the sealing effect is further improved.

The present invention may be further configured in a preferred embodiment as: the output butt joint assembly comprises a communication sleeve and a butt joint ring, a butt joint internal thread is arranged in an output port of the oil collecting plate, and a butt joint external thread matched with the butt joint internal thread is arranged on the communication sleeve; the telescopic outside cover of intercommunication is equipped with the sealing rubber ring, the sealing rubber ring sets up between butt ring and collection oil board, set up the through-hole of stepping down that supplies the intercommunication sleeve to pass on the oil feed casing, the sealing rubber ring is with the inner wall butt of the through-hole of stepping down.

By adopting the technical scheme, the communication sleeve 25 is communicated with the output port, and then the communication sleeve 25 can be conveniently communicated with an external oil pipeline, so that the oil in the oil collecting plate is more conveniently output; the sealing rubber ring is used for abutting against the outer wall of the communication sleeve and the inner wall of the abdicating through hole, so that a gap between the communication sleeve and the abdicating through hole is better blocked, and leakage from the communication sleeve 25 is better avoided; the abdicating through hole is used for the communicating sleeve 25 to pass through, when in installation, the oil collecting plate is firstly put into the oil inlet shell, the output port is communicated with the abdicating through hole, and then the communicating sleeve is installed.

The present invention may be further configured in a preferred embodiment as: and a connecting nut is arranged at one end of the communicating sleeve 25, which is far away from the oil collecting plate.

Through adopting above-mentioned technical scheme, coupling nut makes can adopt the convenient installation and the dismantlement of communicating sleeve 25 of instruments such as spanner to can be more convenient maintain this radial plunger pump.

The present invention may be further configured in a preferred embodiment as: the oil inlet shell is provided with a locking screw rod in a penetrating mode, the oil collecting plate is provided with a through hole for the locking screw rod to penetrate through, the locking screw rod penetrates through the sealing pump cover, and a locking sleeve is matched with one end, close to the sealing pump cover, of the locking screw rod in a threaded mode.

Through adopting above-mentioned technical scheme, locking screw runs through oil feed casing, collection oil board and sealed pump cover, and rethread locking sleeve and locking screw's screw-thread fit can be in the same place oil feed casing, collection oil board and sealed pump cover locking, only need lift locking screw and locking sleeve when dismantling moreover, can be convenient separate oil feed casing, collection oil board and sealed pump cover for the dismouting is maintained all comparatively conveniently.

The present invention may be further configured in a preferred embodiment as: the locking sleeve is provided with a sealing cap which seals one end of a threaded hole in the locking sleeve, and the projection of the sealing cap on the end face of the locking sleeve is in the shape of a regular polygon.

Through adopting above-mentioned technical scheme, the sealing cap is arranged in the clearance shutoff between locking sleeve and the locking screw, avoids dirty and dust to enter into in the clearance of locking screw and locking sleeve.

The present invention may be further configured in a preferred embodiment as: a filter screen is arranged at the position, close to the oil suction hole, of the cylinder body.

Through adopting above-mentioned technical scheme, the filter screen is used for filtering oil, avoids debris in the oil to cause the jam to the cylinder body for this radial plunger pump can use for a longer time.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the pump shell assembly comprises an oil inlet shell and a sealing pump cover, so that the connecting position of the pump shell is less, and the oil inlet shell and the sealing pump cover can be better sealed; the sealing assembly is used for plugging a gap between the oil inlet shell and the sealing pump cover, so that oil leakage is avoided better;

2. the oil collecting plate is used for collecting oil in the cylinder body so as to be output in a centralized mode, and the oil collecting plate and the oil inlet shell are arranged in a split mode, so that the oil collecting plate is more convenient to disassemble, assemble and maintain.

Drawings

Fig. 1 is a schematic view of the entire pump casing assembly of the present embodiment.

Fig. 2 is a schematic view of the interior of the pump housing assembly of the present embodiment.

Fig. 3 is an enlarged view of a portion a of fig. 2.

Fig. 4 is a sectional view of the present embodiment in the direction of the plunger axis.

Fig. 5 is a structural schematic diagram of the locking screw and the sealing cap in an exploded state according to the present embodiment.

Fig. 6 is a schematic view of the docking assembly of the present embodiment in an exploded state.

In the drawings, 1, a pump casing assembly; 2. a rotating shaft; 3. an eccentric wheel; 4. a plunger assembly; 5. an oil inlet housing; 6. sealing the pump cover; 7. an oil inlet sleeve; 8. a seal assembly; 9. a cylinder body; 10. a plunger; 11. a return spring; 12. an oil suction hole; 13. an oil pressing hole; 14. an oil suction one-way valve; 15. a pressure oil one-way valve; 16. an oil collecting plate; 17. an oil collecting hole; 18. an output port; 19. an output docking assembly; 20. a sealing groove; 21. sealing the rubber ring; 22. positioning the convex ring; 23. a positioning groove; 24. a sealing baffle ring; 25. a communicating sleeve; 26. a butting ring; 27. butting the internal threads; 28. butting external threads; 29. sealing the rubber ring; 30. a yielding through hole; 31. a connecting nut; 32. locking the screw rod; 33. a through hole is penetrated; 34. a locking sleeve; 35. a sealing cap; 36. and (4) a filter screen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a radial plunger pump convenient for maintenance disclosed by the present invention comprises a pump case assembly 1, a rotating shaft 2, an eccentric wheel 3 arranged on the rotating shaft 2, and a plunger assembly 4 arranged in the pump case assembly 1; the pump shell assembly 1 comprises an oil inlet shell 5 and a sealing pump cover 6, the sealing pump cover 6 covers the oil inlet shell 5, an oil inlet is formed in one end, away from the sealing pump cover 6, of the oil inlet shell 5, an oil inlet sleeve 7 is integrally formed at the position, located at the oil inlet, of the oil inlet shell 5, a connecting internal thread is arranged in the oil inlet sleeve 7, and the oil inlet sleeve 7 can be communicated with an oil conveying pipe through the connecting internal thread.

Referring to fig. 2, a bearing is arranged in the oil inlet shell 5, the outer ring of the bearing is in transition fit with the oil inlet shell 5, the bearing is arranged on the sealing pump cover 6 in the upper middle, the outer ring of the bearing is in transition fit with the sealing pump cover 6, the two bearings are coaxially arranged, the rotating shaft 2 simultaneously penetrates through the inner rings of the two bearings, and the rotating shaft 2 is in transition fit with the inner rings of the two bearings.

Referring to fig. 3, a sealing assembly 8 is arranged between the oil inlet housing 5 and the sealing pump cover 6, and the sealing assembly 8 is used for blocking a gap between the oil inlet housing 5 and the sealing pump cover 6; the sealing assembly 8 comprises a sealing groove 20 arranged at one end of the oil inlet shell 5 close to the sealing pump and a sealing rubber ring 21 embedded in the sealing groove 20; the edge of the inner side of one end, facing the sealing pump cover 6, of the oil inlet shell 5 extends towards one end of the sealing pump to form a positioning convex ring 22, the end, facing the oil inlet shell 5, of the sealing pump cover 6 is provided with a positioning groove 23, and the positioning convex ring 22 is inserted into the positioning groove 23, so that the oil inlet shell 5 can be matched with the sealing pump cover 6 more accurately, and the oil inlet shell 5 and the sealing pump cover 6 can be installed more conveniently. The sealing pump cover 6 extends towards the outside of 5 one ends of the oil inlet casing and towards the direction of the oil inlet casing 5 to form a sealing baffle ring 24, the inner side of the sealing baffle ring 24 is abutted to the sealing rubber ring 21, the sealing baffle ring 24 covers the sealing rubber ring 21, the sealing rubber ring 21 is prevented from being damaged, and the sealing effect is further improved.

Referring to fig. 4, the plunger assembly 4 includes a cylinder 9, a plunger 10 connected to the cylinder 9 in a sliding manner, and a return spring 11 for pushing the plunger 10 to reset, a piston hole is formed in the cylinder 9, the plunger 10 is inserted into the piston hole, and the plunger 10 is attached to an inner wall of the piston hole; an oil suction hole 12 communicated with the piston hole is formed in one end, far away from the plunger 10, of the cylinder body 9, an oil suction one-way valve 14 is connected in the oil suction hole 12 in a threaded mode, the oil suction one-way valve 14 is used for preventing oil in the piston hole from entering the oil inlet shell 5, and a filter screen 36 is welded at one end, far away from the rotating shaft 2, of the oil suction hole 12; an oil inlet gap is formed between the cylinder body 9 and the inner wall of the oil inlet shell 5, one end of the plunger 10, which is far away from the oil suction hole 12, is provided with a matching plate which is attached to the eccentric wheel 3, and eight plunger assemblies 4 are uniformly arranged along the circumferential direction of the rotating shaft 2.

Referring to fig. 4, an oil collecting plate 16 is arranged in the oil inlet housing 5, the plunger assembly 4 is provided with a circle on each of two sides of the oil collecting plate 16, two side surfaces of the oil collecting plate 16 are respectively attached to the cylinder 9, and the oil inlet housing 5 and the sealing pump cover 6 clamp the cylinder 9 and the oil collecting plate 16 in the two-circle plunger assembly 4 therebetween.

Referring to fig. 2 and 5, a locking screw 32 penetrates through the oil inlet housing 5, a through hole 33 for the locking screw 32 to pass through is formed in the oil collecting plate 16, the locking screw 32 penetrates through the through hole 33 and then penetrates through the sealing pump cover 6, and a locking sleeve 34 is in threaded fit with one end, close to the sealing pump cover 6, of the locking screw 32; the one end that sealing pump cover 6 was kept away from to locking sleeve 34 is equipped with sealed cap 35, and sealed cap 35 seals the one end of screw hole, and the projection of sealed cap 35 at the terminal surface of locking sleeve 34 is regular hexagon, and sealed cap 35's whole is approximately the hexagonal prism promptly. The middle end of the locking screw 32 is an optical axis, and the cylinder body 9 is close to the positions on the two sides and is matched with the optical axis to position the shaft hole, so that the cylinder body 9 is more stably installed.

Referring to fig. 4, a side of the cylinder 9 facing the oil collecting plate 16 is provided with an oil pressing hole 13, the oil collecting plate 16 is provided with a communicating groove communicated with the oil pressing hole 13, the oil collecting plate 16 is provided with an output port 18 communicated with an oil collecting hole 17, and the oil collecting plate 16 is welded with a blocking plate for blocking the communicating groove; and an oil pressing one-way valve 15 is welded at the oil pressing hole 13, and the oil pressing one-way valve 15 is used for preventing oil in the communicating groove from flowing into the piston hole.

Referring to fig. 2 and 6, an output butt joint assembly 19 for butt joint with a pipeline is arranged at the output port 18, the output butt joint assembly 19 comprises a communication sleeve 25 and a butt ring 26, a butt joint internal thread 27 is formed in the output port 18 of the oil collecting plate 16, and a butt joint external thread 28 in threaded fit with the butt joint internal thread 27 is formed on the communication sleeve 25; a sealing rubber ring 29 is sleeved on the outer side of the communication sleeve 25, the sealing rubber ring 29 is arranged between the abutting ring 26 and the oil collecting plate 16, and the sealing rubber ring 29 abuts against both the abutting ring 26 and the oil collecting plate 16; offer the through-hole 30 of stepping down that supplies the intercommunication sleeve 25 to pass on the oil feed casing 5, sealing rubber ring 29 and the inner wall butt of the through-hole 30 of stepping down to can be better to the intercommunication sleeve 25 with step down the clearance between the through-hole 30 and carry out the shutoff. The end of the communication sleeve 25 remote from the oil collecting plate 16 is provided with a coupling nut 31, and the coupling nut 31 can be turned by a wrench to disassemble and assemble the communication sleeve 25.

The installation process briefly describes:

1. firstly, a bearing is installed in an oil inlet housing 5, and then a rotating shaft 2 with an eccentric wheel 3 is installed in the bearing;

2. then, a locking screw 32 penetrates through a preset mounting hole in the oil inlet shell 5, the first circumferential plunger assembly 4 is mounted between the eccentric wheel 3 and the oil inlet shell 5, and a positioning shaft hole is matched with an optical axis on the locking screw 32;

3. then, the abdicating through hole 30 on the oil collecting plate 16 is sleeved on the locking screw 32, and then the second-cycle plunger assembly 4 is installed;

4. then, the seal pump cover 6 with the bearing installed is installed on the rotating shaft 2, the seal rubber ring 21 is embedded in the seal groove 20, and the locking sleeve 34 and the locking screw 32 are screwed together;

5. finally, a sealing rubber ring 29 is fitted over the communication sleeve 25, and the communication sleeve 25 is screwed into the output port 18.

The embodiments of the present invention are the preferred embodiments of the present invention, and the protection scope of the present invention is not limited by this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A radial plunger pump convenient for maintenance comprises a pump shell assembly (1), a rotating shaft (2), an eccentric wheel (3) arranged on the rotating shaft (2) and a plunger assembly (4) arranged in the pump shell assembly (1);

the method is characterized in that: the pump shell assembly (1) comprises an oil inlet shell (5) and a sealing pump cover (6) covered on the oil inlet shell (5), an oil inlet is formed in the oil inlet shell (5), and a sealing assembly (8) used for sealing a gap between the oil inlet shell (5) and the sealing pump cover (6) is arranged between the oil inlet shell (5) and the sealing pump cover;

the plunger assembly (4) comprises a cylinder body (9), a plunger (10) connected with the cylinder body (9) in a sliding mode and a return spring (11) used for pushing the plunger (10) to reset, an oil suction hole (12) communicated with the interior of the cylinder body (9) and an oil pressing hole (13) used for oil supply and discharge are formed in the cylinder body (9), an oil suction one-way valve (14) is arranged in the oil suction hole (12), and an oil pressing one-way valve (15) is arranged in the oil pressing hole (13);

an oil collecting plate (16) is arranged in the oil inlet shell (5), an oil collecting hole (17) communicated with the oil pressing hole (13) is formed in the oil collecting plate (16), an output port (18) communicated with the oil collecting hole (17) is formed in the oil collecting plate (16), and an output butt joint assembly (19) used for being in butt joint with a pipeline is arranged at the output port (18).

2. A service-friendly radial piston pump as set forth in claim 1, wherein: the sealing assembly (8) comprises a sealing groove (20) and a sealing rubber ring (21), the sealing groove (20) is formed in one end, facing the sealing pump cover (6), of the oil inlet shell (5), and the sealing rubber ring (21) is embedded in the sealing groove (20); the oil inlet shell (5) is provided with a positioning convex ring (22) extending outwards towards the inner side edge of one end of the sealing pump cover (6), and the sealing pump cover (6) is provided with a positioning groove (23) matched with the positioning convex ring (22).

3. A service-friendly radial piston pump as set forth in claim 2, wherein: the sealing pump cover (6) extends towards the direction of the outer side of one end of the oil inlet shell (5) towards the oil inlet shell (5) to form a sealing baffle ring (24), and the inner side wall of the sealing baffle ring (24) is abutted to the sealing rubber ring (21).

4. A service-friendly radial piston pump as set forth in claim 1, wherein: the output butt joint assembly (19) comprises a communication sleeve (25) and a butt joint ring (26), a butt joint internal thread (27) is arranged in the output port (18) of the oil collecting plate (16), and a butt joint external thread (28) in threaded fit with the butt joint internal thread (27) is arranged on the communication sleeve (25); the outside cover of intercommunication sleeve (25) is equipped with sealing rubber ring (29), sealing rubber ring (29) set up between butt ring (26) and oil collection board (16), offer on oil feed casing (5) and supply yielding through-hole (30) that intercommunication sleeve (25) passed, sealing rubber ring (29) and the inner wall butt of yielding through-hole (30).

5. A radial piston pump for ease of maintenance as claimed in claim 4, wherein: and a connecting nut (31) is arranged at one end of the communicating sleeve (25) far away from the oil collecting plate (16).

6. A service-friendly radial piston pump as set forth in claim 1, wherein: the oil inlet casing (5) is provided with a locking screw (32) in a penetrating mode, the oil collecting plate (16) is provided with a through hole (33) for the locking screw (32) to penetrate through, the locking screw (32) penetrates through the sealing pump cover (6), and a locking sleeve (34) is in threaded fit with one end, close to the sealing pump cover (6), of the locking screw (32).

7. A service-friendly radial piston pump as claimed in claim 6, wherein: the locking sleeve (34) is provided with a sealing cap (35) which seals one end of a threaded hole of the locking sleeve (34), and the projection of the sealing cap (35) on the end face of the locking sleeve (34) is in the shape of a regular polygon.

8. A service-friendly radial piston pump as set forth in claim 1, wherein: a filter screen (36) is arranged at the position of the cylinder body (9) close to the oil suction hole (12).