A sealing device for a hydraulic ceramic piston pump

Abstract

The application discloses a sealing device of a hydraulic ceramic plunger pump, which comprises a pressing screw ring, a locking nut, a first locking screw, an adjusting gear and a sealing element. The sealing element is arranged at the bottom of a sealing cavity between a pump body and a plunger of the hydraulic ceramic plunger pump. The pressing screw ring is sleeved on the outer surface of the plunger and extends into the sealing cavity. The outer side of the upper end and the lower end of the pressing screw ring are respectively provided with a tooth and an external thread. The first locking screw is fixed on one side of the pump body by screwing. The adjusting gear is arranged at the upper end of the first locking screw and is engaged with the pressing screw ring. The locking nut is arranged between the first locking screw and the pressing screw ring and is connected with the pressing screw ring by screwing. The sealing element has a long service life, a low replacement frequency, can save operation cost and improve production efficiency.

Description

【TECHNICAL FIELD]

[0001] The present application relates to the technical field of plunger pump, in particular to the technical field of sealing device of hydraulic ceramic plunger pump.

【BACKGROUND]

[0002] The plunger pump is an important device of hydraulic system, which relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working cavity to realize oil suction or oil compression. It has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation, and is widely used in high pressure, large flow and flow regulation occasions, such as hydraulic machine, engineering machinery and ship.

[0003] As shown in Figures 1-3 The current hydraulic ceramic plunger pump on the market is sealed by several rubber sealing rings b with square cross section, separated by plastic spacer a, and compressed by three screws d and pressure ring c to compress the sealing ring b. This sealing structure has the problems of uneven compression of the pressure ring c, large wear of the sealing ring b and short service life, which needs to be solved.

SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art, and to provide a sealing device for hydraulic ceramic plunger pump, which has long service life of sealing element, low replacement frequency, can save operation cost and improve production efficiency.

[0005] To achieve the above purpose, the present application provides a sealing device for hydraulic ceramic plunger pump, which comprises a compression screw ring, a locking nut, a first locking screw, an adjusting gear and a sealing element. The sealing element is located at the bottom of the sealing cavity between the pump body and the plunger of the hydraulic ceramic plunger pump. The compression screw ring is sleeved on the outside of the plunger and the bottom extends into the sealing cavity. The outer side of the compression screw ring is provided with teeth and external threads at the upper end and the lower end respectively. The first locking screw is fixed on one side of the pump body by screwing. The adjusting gear is located at the upper end of the first locking screw and engages with the compression screw ring. The locking nut is located between the first locking screw and the compression screw ring and is connected with the compression screw ring by screwing.

[0006] As a preferred embodiment, a plurality of first annular grooves are provided on the connecting surface of the compression screw ring and the plunger, and a first O-shaped sealing ring is fixed in the first annular groove. A plurality of second annular grooves are provided on the connecting surface of the compression screw ring and the pump body, and a second O-shaped sealing ring is fixed in the second annular groove.

[0007] As a preferred embodiment, a water flow channel is provided on the connecting surface of the compression screw ring and the plunger.

[0008] As a preferred embodiment, an annular protrusion is provided on the outer wall of the compression screw ring above the locking nut.

[0009] As preferred, the first locking screw is screwed in the first threaded hole of the pump body, the top of the first locking screw is provided with a second threaded hole, the adjusting gear sleeve is arranged outside the top end of the first locking screw, the top end of the adjusting gear is provided with a stepped hole penetrating the second threaded hole, the adjusting gear is fixed on the first locking screw by the second locking screw, and the top end of the adjusting gear is provided with a square protrusion.

[0010] As preferred, the sealing member comprises Y-shaped sealing rings, VY-shaped sealing rings and V-shaped sealing support rings, the bottom end of the Y-shaped sealing ring is provided with a first Y-shaped socket, the bottom end of the VY-shaped sealing ring is provided with a second Y-shaped socket, the top end of the VY-shaped sealing ring is provided with a first trapezoidal protrusion, the top end of the V-shaped sealing support ring is provided with a second trapezoidal protrusion, the second Y-shaped sockets and the first trapezoidal protrusions of the VY-shaped sealing rings are inserted in front and behind, the first trapezoidal protrusion of the VY-shaped sealing ring at the uppermost layer is inserted with the first Y-shaped socket of the Y-shaped sealing ring, and the second Y-shaped socket of the VY-shaped sealing ring at the lowermost layer is inserted with the second trapezoidal protrusion of the V-shaped sealing support ring.

[0011] As preferred, the bottoms of the Y-shaped sealing rings and the VY-shaped sealing rings gradually expand outward, the upper parts of the Y-shaped sealing rings and the VY-shaped sealing rings are respectively provided with first annular protrusions and second annular protrusions, and the outermost ends of the first annular protrusions and the second annular protrusions are respectively located on the same plane with the outermost ends of the bottoms of the Y-shaped sealing rings and the VY-shaped sealing rings.

[0012] As preferred, the Y-shaped sealing rings, the VY-shaped sealing rings and the V-shaped sealing support rings are filled with water-resistant lubricating grease.

[0013] As preferred, the mud hanging piece is further provided, which sleeves the plunger and is respectively located at the top end of the compression ring and the bottom end of the sealing member.

[0014] As preferred, the inner end of the mud hanging piece is bent away from the compression ring or the sealing member and forms a bending part.

[0015] The beneficial effects of the present application are as follows: the present application adjusts the rotation of the compression screw ring driven by the gear, cooperates with the locking nut, thereby making the compression screw ring uniformly compress the sealing element 7 vertically downward; the annular protrusion arranged on the compression screw ring effectively prevents dust; by changing the structure of the sealing ring, using the Y-shaped sealing ring, the VY-shaped sealing ring and the V-shaped sealing support ring, in the case of sealing ring sealing failure, the sealing state can be restored through multiple compression of the compression screw ring, thereby greatly prolonging the service life of the sealing element; by arranging the first annular protrusion and the second annular protrusion outside the Y-shaped sealing ring and the VY-shaped sealing ring respectively, the contact area between the sealing ring and the plunger is effectively reduced, and an additional sealing is provided; by filling the water-resistant type lubricating grease in the sealing element, the friction coefficient between the plunger and the sealing element is reduced; by arranging the upper and lower two pieces of mud hanging pieces, the coarse particles on the surface of the plunger can be blocked outside the sealing element, thereby reducing the wear of the sealing element.

[0016] The features and advantages of the present application will be described in detail with reference to the embodiments in conjunction with the drawings.

DRAWINGS

[0017] Figure 1 is a front view of the existing sealing device installed in the hydraulic ceramic plunger pump;

[0018] Figure 2 is Figure 1 A-A sectional view of the A-A direction of

[0019] Figure 3 is Figure 2 enlarged view of the B of

[0020] Figure 4 is a schematic view of the installation of the sealing device of the hydraulic ceramic plunger pump of the present application;

[0021] Figure 5 is Figure 4 enlarged view of the C of

[0022] Figure 6 is a sectional view of the Y-shaped sealing ring of the sealing device of the hydraulic ceramic plunger pump of the present application;

[0023] Figure 7 is a sectional view of the VY-shaped sealing ring of the sealing device of the hydraulic ceramic plunger pump of the present application;

[0024] Figure 8 is a sectional view of the V-shaped sealing support ring of the sealing device of the hydraulic ceramic plunger pump of the present application;

[0025] Figure 9 is a sectional view of the mud hanging piece of the sealing device of the hydraulic ceramic plunger pump of the present application

[0026] In the figure: 1-pump body, 11-first threaded hole, 2-plunger, 3-pressing ring, 31-first annular groove, 32-second annular groove, 33-water passage, 34-annular protrusion, 4-locking nut, 5-first locking screw, 51-second threaded hole, 6-adjusting gear, 61-step hole, 62-square protrusion, 7-seal, 71-Y-shaped seal ring, 711-first Y-shaped socket, 712-first annular ridge, 72-VY-shaped seal ring, 721-second Y-shaped socket, 722-first trapezoidal protrusion, 723-second annular ridge, 73-V-shaped seal support ring, 731-second trapezoidal protrusion, 8-mud hanging piece, 81-bent part, a-plastic spacer, b-seal ring, c-pressing ring, d-screw. DETAILED DESCRIPTION

[0027] Referring to Figures 4-9The application discloses a sealing device of a hydraulic ceramic plunger pump, which comprises a compression ring 3, a locking nut 4, a first locking screw 5, an adjusting gear 6 and a sealing element 7. The sealing element 7 is arranged at the bottom of a sealing cavity between a pump body 1 and a plunger 2 of the hydraulic ceramic plunger pump. The compression ring 3 is sleeved on the plunger 2 and extends into the sealing cavity. The outer side of the compression ring 3 is provided with teeth and external threads at the upper end and the lower end respectively. The first locking screw 5 is fixed on one side of the pump body 1 by threads. The adjusting gear 6 is arranged at the upper end of the first locking screw 5 and is engaged with the compression ring 3. The locking nut 4 is arranged between the first locking screw 5 and the compression ring 3 and is connected with the compression ring 3 by threads. A plurality of first annular grooves 31 are arranged on the connecting surface between the compression ring 3 and the plunger 2, and a first O-shaped sealing ring is fixed in the first annular grooves 31. A plurality of second annular grooves 32 are arranged on the connecting surface between the compression ring 3 and the pump body 1, and a second O-shaped sealing ring is fixed in the second annular grooves 32. A water flow channel 33 is arranged on the connecting surface between the compression ring 3 and the plunger 2. An annular protrusion 34 is arranged on the outer wall of the compression ring 3 and above the locking nut 4. The first locking screw 5 is fixed in a first threaded hole 11 of the pump body 1 by threads. A second threaded hole 51 is arranged at the top of the first locking screw 5. The adjusting gear 6 is sleeved on the top of the first locking screw 5. A stepped hole 61 is arranged at the top of the adjusting gear 6 and penetrates through the second threaded hole 51. The adjusting gear 6 is fixed on the first locking screw 5 by a second locking screw. A square protrusion 62 is arranged at the top of the adjusting gear 6. The sealing element 7 comprises a Y-shaped sealing ring 71, a VY-shaped sealing ring 72 and a V-shaped sealing support ring 73. A first Y-shaped socket 711 is arranged at the bottom of the Y-shaped sealing ring 71. A second Y-shaped socket 721 is arranged at the bottom of the VY-shaped sealing ring 72. A first trapezoidal protrusion 722 is arranged at the top of the VY-shaped sealing ring 72. A second trapezoidal protrusion 731 is arranged at the top of the V-shaped sealing support ring 73. The second Y-shaped sockets 721 and the first trapezoidal protrusions 722 of a plurality of VY-shaped sealing rings 72 are inserted in front of and behind each other. The first trapezoidal protrusion 722 of the VY-shaped sealing ring 72 at the uppermost layer is inserted with the first Y-shaped socket 711 of the Y-shaped sealing ring 71. The second Y-shaped socket 721 of the VY-shaped sealing ring 72 at the lowermost layer is inserted with the second trapezoidal protrusion 731 of the V-shaped sealing support ring 73. The bottoms of the Y-shaped sealing ring 71 and the VY-shaped sealing ring 72 gradually expand outwards. First annular protrusions 712 and second annular protrusions 723 are arranged at the upper edges of the Y-shaped sealing ring 71 and the VY-shaped sealing ring 72 respectively. The outermost ends of the first annular protrusions 712 and the second annular protrusions 723 are located on the same plane with the outermost ends of the bottoms of the Y-shaped sealing ring 71 and the VY-shaped sealing ring 72 respectively. Water-resistant lubricating grease is filled between the Y-shaped sealing ring 71, the VY-shaped sealing ring 72 and the V-shaped sealing support ring 73. A mud hanging piece 8 is further arranged.The hanging mud piece 8 is sleeved outside the plunger 2 and is located at the top of the compression screw ring 3 and the bottom of the sealing member 7 respectively, and the inner end of the hanging mud piece 8 is bent away from the side of the compression screw ring 3 or the sealing member 7 and forms a bending part 81.

[0028] Working process of the present application:

[0029] First, the square protrusion 62 at the top of the adjusting gear 6 is turned by a wrench, the adjusting gear 6 drives the compression screw ring 3 to gradually rotate and move downward in the locking nut 4, thereby uniformly compressing the sealing member 7. Then, the second locking screw is screwed into the second threaded hole 51 after passing through the stepped hole 61, thereby fixing the adjusting gear 6 on the first locking screw 5.

[0030] The present application drives the compression screw ring to rotate by the adjusting gear, cooperates with the locking nut, thereby making the compression screw ring uniformly compress the sealing member 7 vertically downward; sets the annular protrusion on the compression screw ring, effectively prevents dust; changes the structure of the sealing ring, uses the Y-shaped sealing ring, the VY-shaped sealing ring and the V-shaped sealing support ring, and inserts and combines the front and back, thereby in the case of sealing failure of the sealing ring, the sealing state can be restored by multiple compression of the compression screw ring, greatly prolongs the service life of the sealing member; sets the first annular protrusion and the second annular protrusion outside the Y-shaped sealing ring and the VY-shaped sealing ring respectively, effectively reduces the contact area between them and the plunger, and adds a sealing; fills the water-resistant type lubricating grease in the sealing member, reduces the friction coefficient between the plunger and the sealing member; sets the upper and lower two pieces of hanging mud piece, can block the coarse particles on the surface of the plunger outside the sealing member, reduces the wear of the sealing member.

[0031] The above examples are descriptions of the present application, not limitations of the present application, and any simple transformation of the present application belongs to the protection scope of the present application.

Claims

1. A sealing arrangement for a hydraulic ceramic piston pump, characterized by: The utility model relates to a hydraulic ceramic plunger pump, which comprises a compression ring (3), a locking nut (4), a first locking screw (5), an adjusting gear (6) and a sealing element (7). The sealing element (7) is located at the bottom of the sealing cavity between the pump body (1) and the plunger (2) of the hydraulic ceramic plunger pump. The compression ring (3) is sleeved on the plunger (2) and extends into the sealing cavity. The outer side of the compression ring (3) is provided with teeth and external threads at the upper end and the lower end, respectively. The first locking screw (5) is fixed in a thread hole (11) of the pump body (1). The top of the first locking screw (5) is provided with a second thread hole (51). The adjusting gear (6) is sleeved on the top of the first locking screw (5). The top of the adjusting gear (6) is provided with a stepped hole (61) which is in communication with the second thread hole (51). The adjusting gear (6) is fixed on the first locking screw (5) by a second locking screw. The top of the adjusting gear (6) is provided with a square protrusion (62). The sealing element (7) comprises a Y-shaped sealing ring (71), a VY-shaped sealing ring (72) and a V-shaped sealing support ring (73). The bottom of the Y-shaped sealing ring (71) is provided with a first Y-shaped socket (711). The bottom of the VY-shaped sealing ring (72) is provided with a second Y-shaped socket (721). The top of the VY-shaped sealing ring (72) is provided with a first trapezoidal protrusion (722). The top of the V-shaped sealing support ring (73) is provided with a second trapezoidal protrusion (731). The second Y-shaped socket (721) and the first trapezoidal protrusion (722) of the VY-shaped sealing ring (72) are inserted in front of and behind each other. The first trapezoidal protrusion (722) of the VY-shaped sealing ring (72) at the uppermost layer is inserted into the first Y-shaped socket (711) of the Y-shaped sealing ring (71). The second Y-shaped socket (721) of the VY-shaped sealing ring (72) at the lowermost layer is inserted into the second trapezoidal protrusion (731) of the V-shaped sealing support ring (73). The bottoms of the Y-shaped sealing ring (71) and the VY-shaped sealing ring (72) gradually expand outward. The upper edges of the Y-shaped sealing ring (71) and the VY-shaped sealing ring (72) are respectively provided with a first annular protruding rib (712) and a second annular protruding rib (723). The outermost ends of the first annular protruding rib (712) and the second annular protruding rib (723) are located on the same plane as the outermost ends of the bottoms of the Y-shaped sealing ring (71) and the VY-shaped sealing ring (72). The connecting surface of the compression ring (3) and the plunger (2) is provided with a water passage (33). The outer wall of the compression ring (3) and above the locking nut (4) is provided with an annular protrusion (34). The Y-shaped sealing ring (71), the VY-shaped sealing ring (72) and the V-shaped sealing support ring (73) are filled with water-resistant lubricating grease.Further comprising a mud hanging piece (8), the mud hanging piece (8) is sleeved outside the plunger (2) and is respectively located at the top end of the compression screw ring (3) and the bottom end of the sealing element (7), the inner end of the mud hanging piece (8) is bent away from one side of the compression screw ring (3) or the sealing element (7) and forms a bending part (81).

2. A seal assembly for a hydraulic ceramic piston pump as set forth in claim 1, characterized in that: The connecting surface of the compression screw ring (3) and the plunger (2) is provided with a plurality of first annular grooves (31), and the first annular grooves (31) are fixed with first O-shaped sealing rings; the connecting surface of the compression screw ring (3) and the pump body (1) is provided with a plurality of second annular grooves (32), and the second annular grooves (32) are fixed with second O-shaped sealing rings.

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