Piston sealing ring assembly of emulsification pump

Abstract

The utility model discloses a piston sealing ring assembly of an emulsification pump, which comprises an annular sealing ring and an annular supporting seat made of metal materials, the sealing ring is adhered to the supporting seat through a rubber forming process, the supporting seat comprises an annular main body and an annular combining part axially extending from one axial end of the main body, and the annular combining part is connected with the sealing ring through a rubber forming process. The combination part and the sealing ring are connected in a matched mode to form an inner framework of the sealing ring, the sealing ring is connected to one axial end of a main body of the supporting seat through the combination part, an inner hole of the sealing ring is connected with an inner hole of the supporting seat, and a plurality of annular sealing lips are arranged on the inner circumferential wall of the sealing ring. The multiple sealing lips are distributed in the axial direction of the sealing ring, and the inner diameter of lip openings of the sealing lips is smaller than the diameter of an inner hole of the supporting base. According to the piston sealing ring assembly of the emulsification pump, the design of multiple lips is adopted, the structure is simple, the assembling reliability is higher, the sealing effect is better, and the sealing performance of an oil seal is improved.

Description

Technical Field

[0001] The utility model relates to a sealing ring assembly, in particular to a sealing ring assembly of a piston emulsification pump. Background Art

[0002] The operating principle of a plunger-type emulsion pump is that a plunger, connected to a piston, reciprocates within the high-pressure cylinder sleeve of the pump cylinder, drawing liquid in through an inlet valve and discharging it through a discharge valve, achieving continuous liquid supply. This operating mode of the plunger pump enables continuous liquid delivery, making it suitable for a variety of high-pressure liquid delivery applications. The basic structure of a plunger-type emulsion pump mainly includes a crankcase assembly, a pump head assembly, and a hydraulic conversion assembly. The hydraulic conversion assembly includes a piston and a plunger, which are connected and flexibly fitted. To prevent lubricating oil in the crankcase from leaking through the connection between the piston and the pump body, a piston seal assembly is generally provided between the piston and the pump body. For example, the Chinese invention patent application "A Seven-Plunger Emulsion Pump" (CN116753132A) discloses an emulsion pump with a conventional structure.

[0003] The defects of the existing sealing rings used in this type of plunger emulsion pump are: the sealing ring is usually arranged at the outer end of the piston, and is fixed to the piston cavity of the pump body by a steel ring and screws. It is easy to shake after long-term operation, resulting in displacement or even falling off of the steel ring and the sealing ring; the sealing ring generally achieves sealing cooperation with the piston through a single sealing lip, and the sealing effect needs to be improved. Summary of the Invention

[0004] The utility model provides an emulsification pump piston sealing ring assembly with stronger assembly reliability and better sealing effect.

[0005] The piston seal ring assembly of an emulsification pump of the present invention comprises an annular seal ring and an annular support seat made of metal, for example steel, wherein the seal ring is bonded to the support seat through a rubber molding process, the support seat comprises an annular main body and an annular joint portion axially extending from one axial end of the main body, the joint portion and the seal ring are cooperatively connected and constitute an internal skeleton of the seal ring, the seal ring is connected to one axial end of the main body of the support seat through the joint portion, the inner hole of the seal ring is connected to the inner hole of the support seat, and forms a movable fit with the piston of the pump, a plurality of annular sealing lips are provided on the inner circumferential wall of the seal ring, the plurality of sealing lips are distributed along the axial direction of the seal ring, the inner diameter of the sealing lip lip is smaller than the inner hole diameter of the support seat, and the inner diameter of the sealing lip lip is smaller than the outer diameter of the emulsification pump piston, thereby forming a sealing compression amount between the seal and the piston, the sealing lip is used to closely contact and cooperate with the piston, and when the piston moves, the sealing lip can scrape off the lubricating oil on the piston to prevent the lubricating oil from seeping out with the movement of the piston.

[0006] Furthermore, the thickness of the coupling portion of the support seat is smaller than the thickness of the main body, and a notch is formed at the connection between the support seat main body and the coupling portion. The notch is formed on both the outer peripheral wall and the inner peripheral wall of the support seat, and the sealing ring is partially accommodated in the notch. The setting of the notch can improve the coupling effect between the support seat and the sealing ring, increase the thickness of the sealing ring, and make the overall structure more compact.

[0007] Furthermore, grooves are provided on the inner and outer walls of the coupling portion, and the sealing ring is partially accommodated in the grooves. The provision of the grooves can improve the coupling effect between the sealing ring and the support seat, making the sealing ring less likely to fall off.

[0008] Furthermore, the coupling portion is evenly distributed along its circumference with a plurality of radially penetrating through holes, and the sealing ring is partially formed in the through holes. The provision of the through holes can improve the coupling effect between the sealing ring and the support seat, making the sealing ring less likely to fall off.

[0009] Furthermore, an annular groove is provided on the outer peripheral wall of the support seat. When the support seat is inserted into the end of the piston cavity of the pump body, the support seat can be axially positioned by screws radially passing through the pump body and the annular groove to prevent the support seat from falling off the pump body. Moreover, since it is annular, assembly is more convenient.

[0010] Furthermore, a plurality of threaded connection holes are evenly distributed along the circumference of the other axial end surface of the support seat, and the threaded connection holes are used to cooperate with the screws axially penetrated on the pump body for positioning, thereby improving the connection effect between the support seat and the sealing ring.

[0011] Furthermore, there are three sealing lips, which correspond to the first, second and third sealing lips distributed along the support seat to the sealing ring. The axial spacing between the first sealing lip and the second sealing lip is greater than the axial spacing between the second sealing lip and the third sealing lip. The axially adjacent sealing lips are connected by a concave arc-shaped annular groove. Since the annular grooves of the first sealing lip and the second sealing lip have a larger space, the deformation effect of the sealing lips can be improved, thereby improving the oil sealing effect. One axial end of the sealing ring has an outwardly protruding raised portion around the inner hole, and the third sealing lip is located on the inner circumferential wall of the raised portion. The provision of the raised portion can improve the deformation effect of the third sealing lip, thereby improving the oil sealing effect.

[0012] Furthermore, it is made of nitrile rubber or polyurethane material, has high wear resistance and tear resistance, and can increase service life.

[0013] Furthermore, the sealing ring is bonded to the support seat through a rubber molding process.

[0014] The beneficial effects of the utility model are as follows: the sealing ring assembly of the utility model has a simple structure and is easy to assemble, and has multiple sealing lips, which can improve the oil sealing effect between the sealing ring and the piston. In addition, the sealing ring is installed and fixed to the pump body through the support seat, and the support seat and the pump body are rigidly connected and the connection is reliable. Since the sealing ring is bonded to the support seat through a rubber molding process, the sealing ring is not easy to shift or fall off, and has good connection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional view of a support base according to an embodiment of the present invention;

[0016] Figure 2 A cross-sectional view of an embodiment of the present utility model;

[0017] Figure 3 This is an axial view of an embodiment of the present utility model;

[0018] Figure 4 A cross-sectional view of a support base according to another embodiment of the present invention;

[0019] Figure 5 This is a cross-sectional view of another embodiment of the present invention. DETAILED DESCRIPTION

[0020] The embodiment of the utility model emulsification pump piston seal ring assembly is as follows: Figure 1-3 As shown: it includes an annular sealing ring 1 and an annular support seat 2 made of metal material, such as steel. The sealing ring 1 is bonded to the support seat 2 through a rubber molding process, which may specifically include a compression molding process or an injection molding process. The sealing ring 1 is bonded to the support seat 2 while being processed and formed. This process can improve the bonding effect between the sealing ring 1 and the support seat 2, making it difficult for the two to be separated. The support seat 2 includes an annular main body 21 and an annular coupling portion 22 axially extending from one axial end of the main body 21. The coupling portion 22 is connected to the sealing ring 1 and constitutes the inner skeleton of the sealing ring 1, which supports and maintains the overall shape of the sealing ring 1. The sealing ring 1 is bonded to the support seat 2 through the coupling portion 2 2 is connected to one axial end of the main body 21 of the support seat 2, the inner hole of the sealing ring 1 is connected to the inner hole of the support seat 2, and forms a movable fit with the piston of the pump. A plurality of annular sealing lips (11a, 11b, 11c) are provided on the inner peripheral wall of the sealing ring 1. The plurality of sealing lips are distributed along the axial direction of the sealing ring 1. The lip opening of the sealing lip and the side surface of the piston form a line contact fit. The inner diameter of the lip opening of the sealing lip is smaller than the inner hole diameter of the support seat 2, and the inner diameter of the lip opening of the sealing lip is smaller than the outer diameter of the emulsification pump piston, thereby forming a sealing compression amount between the seal and the piston. The sealing lip is used to closely contact and fit with the piston. When the piston reciprocates, the sealing lip can scrape off the lubricating oil on the piston to prevent the lubricating oil from seeping out with the movement of the piston.

[0021] The thickness (radial direction) of the coupling portion 22 of the support seat 2 is smaller than the thickness of the main body 21 , and a notch 23 is formed at the connection between the main body 21 of the support seat 2 and the coupling portion 22 . The notch 23 is formed at both the outer circumferential wall and the inner circumferential wall of the support seat 2 . A portion of the sealing ring 1 is accommodated in the notch 23 , and in fact, a portion of the sealing ring 1 is directly formed at the notch 23 . The provision of the notch 23 can improve the coupling effect between the support seat 2 and the sealing ring 1 , increase the thickness of the sealing ring 1 , and make the overall structure more compact.

[0022] In this embodiment, if Figure 1 、 2 As shown, the coupling portion 22 is evenly distributed along its circumference with a plurality of radially penetrating through holes 24, and the sealing ring 1 is partially formed in the through holes 24. The provision of the through holes 24 can improve the anchoring effect of the sealing ring 1 and the support seat 2, making the sealing ring 1 not easy to fall off.

[0023] In other embodiments, Figure 4 、 5 As shown, grooves 25 may be provided on both the inner and outer walls of the coupling portion 22, and a portion of the sealing ring 1 may be accommodated in the groove 25. The provision of the groove 25 can improve the coupling effect between the sealing ring 1 and the support seat 2, making the sealing ring 1 less likely to fall off.

[0024] In this embodiment, an annular groove 27 is provided on the outer peripheral wall of the support seat 2. When the support seat 2 is inserted into the end of the piston cavity of the pump body, the support seat 2 can be axially positioned by screws radially passing through the pump body and the annular groove 27 to prevent the support seat 2 from falling off the pump body. Moreover, since it is annular, assembly is more convenient.

[0025] A plurality of threaded connection holes 26 are evenly distributed along the circumference of the other axial end surface of the support seat 2. The threaded connection holes 26 are used to cooperate with the screws axially penetrated on the pump body for positioning, thereby improving the connection effect between the support seat 2 and the sealing ring 1.

[0026] The sealing lips of this embodiment are three, which correspond to the first, second and third sealing lips (11a, 11b, 11c) distributed along the support seat 2 to the sealing ring. The axial spacing between the first sealing lip 11a and the second sealing lip 11b is greater than the axial spacing between the second sealing lip 11b and the third sealing lip 11c. The axially adjacent sealing lips are connected by a concave arc-shaped annular groove 12. Since the annular grooves 12 of the first sealing lip 11a and the second sealing lip 11b have a larger space, the axial deformation effect of the first sealing lip 11a and the second sealing lip 11b can be improved, so that the sealing lip lip and the piston fit more closely, thereby improving the oil sealing effect. One axial end of the sealing ring 1 has an outwardly protruding raised portion 13 around the inner hole, and the third sealing lip 11c is located on the inner circumferential wall of the raised portion 13. The provision of the raised portion 13 can improve the deformation effect of the third sealing lip 11c, especially the deformation effect along the radial direction, thereby further improving the oil sealing effect.

[0027] In this embodiment, the sealing ring 1 is entirely made of nitrile rubber or polyurethane material, which has high wear resistance and tear resistance and can increase the service life.

[0028] In this embodiment, the sealing ring 1 is bonded to the support base 2 through a rubber molding process. During processing, the sealing ring 1 is pressed and molded on the joint portion 22 of the support base 2 through a mold.

[0029] The assembly structure of the sealing ring assembly of the present invention is as follows: a stepped annular groove is provided at the end of the piston cavity of the pump body, which is used to cooperate with the support seat 2 for embedding and positioning. The screws penetrated on the pump body cooperate with the threaded connection hole 26 and the annular groove 27 of the support seat 2 to fix them, so that the support seat 2 and the pump body are firmly connected together, so that the support seat 2 will not rotate or move axially. The inner holes of the support seat 2 and the sealing ring 1 can be used for the piston to pass through, and the sealing lip of the sealing ring 1 and the piston form a sealing fit.

[0030] The above embodiment is only one preferred embodiment of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An emulsification pump piston seal assembly, comprising an annular seal, characterized in that: It also includes an annular support seat made of metal, and the sealing ring is bonded to the support seat through a rubber molding process. The support seat includes an annular main body and an annular joint portion axially extending from one axial end of the main body. The joint portion and the sealing ring are cooperatively connected and constitute the internal skeleton of the sealing ring. The sealing ring is connected to one axial end of the main body of the support seat through the joint portion, and the inner hole of the sealing ring is connected to the inner hole of the support seat. A plurality of annular sealing lips are provided on the inner circumferential wall of the sealing ring, and the plurality of sealing lips are distributed along the axial direction of the sealing ring, and the inner diameter of the sealing lip is smaller than the inner hole diameter of the support seat.

2. The emulsification pump piston seal assembly according to claim 1, characterized in that: The thickness of the coupling portion of the support seat is smaller than that of the main body. A notch is formed at the connection between the support seat main body and the coupling portion. The notch is formed at both the outer circumferential wall and the inner circumferential wall of the support seat. Part of the sealing ring is accommodated in the notch.

3. The emulsification pump piston seal assembly according to claim 1, characterized in that: Grooves are provided on the inner peripheral wall and the outer peripheral wall of the coupling portion.

4. The emulsification pump piston seal assembly according to claim 1, characterized in that: The coupling portion is evenly provided with a plurality of radially penetrating through holes along its circumference.

5. The emulsification pump piston seal assembly according to claim 1, characterized in that: An annular groove is provided on the outer peripheral wall of the support seat.

6. The emulsification pump piston seal assembly according to claim 1, characterized in that: A plurality of threaded connection holes are evenly distributed along the circumference of the other axial end surface of the support seat.

7. The emulsification pump piston seal assembly according to claim 1, characterized in that: There are three sealing lips, which are respectively the first, second and third sealing lips distributed along the direction from the support seat to the sealing ring. The axial spacing between the first sealing lip and the second sealing lip is greater than the axial spacing between the second sealing lip and the third sealing lip. The axially adjacent sealing lips are connected by a concave arc-shaped annular groove. One axial end of the sealing ring has a raised portion protruding outward around the inner hole, and the third sealing lip is located on the inner circumferential wall of the raised portion.

8. The emulsification pump piston seal assembly according to claim 1, characterized in that: The sealing ring is bonded to the support seat through a rubber molding process.

9. The emulsification pump piston seal assembly according to claim 1, characterized in that: The sealing ring is made of nitrile rubber or polyurethane material.

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