CN211009060U - Water lubricating structure of plunger water pump - Google Patents
Water lubricating structure of plunger water pump Download PDFInfo
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- CN211009060U CN211009060U CN201922140863.XU CN201922140863U CN211009060U CN 211009060 U CN211009060 U CN 211009060U CN 201922140863 U CN201922140863 U CN 201922140863U CN 211009060 U CN211009060 U CN 211009060U
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Abstract
The utility model belongs to the technical field of the plunger water pump, refer in particular to a water lubricating structure of plunger water pump, including the pump body, set up the power cavity on the pump body, intake cavity, and high-pressure chamber, communicate through the check valve between intake cavity and the high-pressure chamber, communicate through the plunger hole between power cavity and the high-pressure chamber, the last rotation of power cavity is connected with the bent axle, the bent axle passes through the connecting rod and is connected with plunger rod transmission, plunger rod sliding connection is downthehole at the plunger, and be provided with the plunger ring between plunger rod and the plunger hole, be located and be provided with sealing washer one and sealing washer two between plunger rod and the plunger hole of plunger ring both sides respectively, the water injection passageway. The utility model discloses the ordinary pressure water of intake cavity passes through water injection passageway drainage to lubricated space in for can carry out water lubrication between plunger ring and the plunger rod, in getting into to the power cavity, the high pressure water of high pressure cavity gets into to lubricated space in with the help of the ordinary pressure water of sealing washer one and two effective prevention lubricated spaces of sealing washer.
Description
The technical field is as follows:
the utility model belongs to the technical field of the plunger water pump, refer in particular to a water lubricating structure of plunger water pump.
Background art:
at present, a plunger rod and a piston ring of a crankshaft type high-pressure plunger water pump are lubricated by oil, and the plunger rod and a plunger hole need to be sealed, so that water is prevented from entering the piston ring from a gap between the plunger rod and the plunger hole. However, it is difficult to ensure complete sealing in practice, and it is inevitable that the oil and water will mix after a period of use, thereby adversely affecting the lubrication of the oil; also, the oil and water can contaminate the liquid after mixing.
The invention content is as follows:
the utility model aims at providing a plunger rod adopts water lubrication, avoids water oil mixing phenomenon's plunger water pump's water lubrication structure with the piston ring.
The utility model discloses a realize like this:
a water lubrication structure of a plunger water pump comprises a pump body, wherein a power cavity, a water inlet cavity communicated with a water inlet and a high-pressure cavity communicated with a water outlet are formed in the pump body, the water inlet cavity is communicated with the high-pressure cavity through a one-way valve, the power cavity is communicated with the high-pressure cavity through a plunger hole, a crankshaft is rotatably connected to the power cavity and is in transmission connection with a plunger rod through a connecting rod, the plunger rod is in sliding connection in the plunger hole, a plunger ring is arranged between the plunger rod and the plunger hole, a first sealing ring and a second sealing ring are arranged between the plunger rod and the plunger hole on two sides of the plunger ring respectively, a lubrication space is formed between the first sealing ring and the second sealing ring, and a water injection channel communicated with the lubrication space and the water.
In the above water lubrication structure of the plunger pump, an annular groove is formed in the inner annular wall of the plunger ring, and a water through hole is formed in the side wall of the annular groove.
In the water lubrication structure of the plunger water pump, the number and the positions of the plunger holes are more than two, the number and the positions of the plunger rods correspond to those of the plunger holes one to one, and the lubrication spaces of two adjacent plunger holes are communicated through the water passing holes.
In the water lubricating structure of the plunger water pump, the pump body is provided with a water return channel, one end of the water return channel is communicated with the lubricating space of one plunger hole, and the other end of the water return channel is communicated with the water inlet chamber.
In the above water lubrication structure of the plunger water pump, the first sealing ring is located on one side of the plunger ring close to the power chamber, the second sealing ring is located on one side of the plunger ring close to the high-pressure chamber, the second sealing ring is a V-shaped sealing ring and comprises a V-shaped sealing ring and a support ring, and the support ring is located on one side of the sealing ring close to the high-pressure chamber.
In the above water lubrication structure of the plunger water pump, the first seal ring is a Y-shaped seal ring or a U-shaped seal ring.
In foretell water lubricating structure of plunger water pump, the pump body is including crankcase and the pump head of fixing on crankcase front end face, power cavity and bent axle setting are on crankcase, intake cavity and high pressure chamber set up on the pump head, seted up smooth hole one on crankcase's the front end face, seted up smooth hole two corresponding with smooth hole one on the rear end face of pump head, form between smooth hole one and the smooth hole two the plunger hole forms, the back port border of smooth hole two forms spacing groove along radial outside concave yield, and the notch department cover in spacing groove is equipped with the position ring cover, sealing washer one, plunger ring and sealing washer two set up between the tank bottom surface of the preceding terminal surface of position ring cover and spacing groove.
In the above water lubrication structure of the plunger pump, the inner hole of the positioning ring sleeve is a stepped hole, and the inner hole is sequentially provided with the small diameter part and the large diameter part from back to front, a positioning step is formed between the small diameter part and the large diameter part, and the first sealing ring is arranged between the plunger rod and the large diameter part.
In the water lubricating structure of the plunger water pump, a third sealing ring is arranged between the locating ring sleeve and the limiting groove.
In foretell water lubricating structure of plunger water pump, be provided with the locating plate between the preceding terminal surface of crankcase body and the rear end face of pump head, set up on the locating plate with two positions of through-hole and the corresponding positioning hole of quantity, and the radius of positioning hole slightly is greater than the radius of spacing groove, the rear end face of position ring cover is inconsistent with the preceding terminal surface of locating plate.
Compared with the prior art, the utility model outstanding advantage is:
1. the utility model discloses the normal pressure water of intake cavity passes through the water injection passageway and drains to in the lubrication space for can carry out the water lubrication between plunger ring and the plunger rod, simultaneously, make the lubrication space become an airtight space with the help of sealing washer one and sealing washer two, effectively prevent the normal pressure water in lubrication space to enter into the power cavity along the clearance between plunger rod and plunger hole, effectively prevent the high pressure water of high pressure cavity to enter into the lubrication space along the clearance between plunger rod and the plunger hole;
2. the utility model discloses a water injection passageway and return water passageway make and form a complete circulation water route between lubricated space and the intake antrum, effectively improve the lubricated effect of water.
Description of the drawings:
fig. 1 is a transverse cross-sectional view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a longitudinal sectional view of the present invention;
fig. 4 is a perspective view of a plunger ring of the present invention;
fig. 5 is a cross-sectional view of the positioning ring of the present invention.
In the figure: 1. a pump body; 2. a power chamber; 3. a water inlet chamber; 4. a high pressure chamber; 5. a one-way valve; 6. a crankshaft; 7. a connecting rod; 8. a plunger rod; 9. a plunger ring; 10. a first sealing ring; 11. a second sealing ring; 12. a water injection channel; 13. an annular groove; 14. a water through hole; 15. water passing holes; 16. a water return channel; 17. a V-shaped seal ring; 18. a support ring; 19. a crankcase body; 20. a pump head; 21. a positioning ring sleeve; 22. a small diameter part; 23. a large diameter portion; 24. a third sealing ring; 25. positioning a plate; 26. the open slot is positioned.
The specific implementation mode is as follows:
the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 5:
a water lubrication structure of a plunger water pump comprises a pump body 1, wherein a power chamber 2, a water inlet chamber 3 communicated with a water inlet and a high-pressure chamber 4 communicated with a water outlet are arranged on the pump body 1, the water inlet chamber 3 is communicated with the high-pressure chamber 4 through a one-way valve 5, the power chamber 2 is communicated with the high-pressure chamber 4 through a plunger hole, a crankshaft 6 is rotatably connected on the power chamber 2, the crankshaft 6 is in transmission connection with a plunger rod 8 through a connecting rod 7, the plunger rod 8 is in sliding connection with the plunger hole, and a plunger ring 9 is arranged between the plunger rod 8 and the plunger hole, a first sealing ring 10 and a second sealing ring 11 are respectively arranged between the plunger rod 8 and the plunger hole which are positioned at two sides of the plunger ring 9, a lubricating space is formed between the first sealing ring 10 and the second sealing ring 11, and a water injection channel 12 for communicating the lubricating space and the water inlet chamber 3 is arranged on the pump body 1.
The utility model discloses the ordinary pressure water of intake cavity 3 passes through water injection passageway 12 drainage to lubricated space in for can carry out water lubrication between plunger ring 9 and the plunger rod 8, simultaneously, make lubricated space become an airtight space with the help of sealing washer 10 and sealing washer two 11, effectively prevent the ordinary pressure water in lubricated space to enter into to power cavity 2 in along the clearance between plunger rod 8 and the plunger hole, high pressure chamber 4's water under high pressure enters into to lubricated space along the clearance between plunger rod 8 and the plunger hole.
In order to improve the water lubrication effect between the plunger ring 9 and the plunger rod 8, an annular groove 13 is formed in the inner annular wall of the plunger ring 9, and a water through hole 14 is formed in the side wall of the annular groove 13.
According to the actual concrete structure of the plunger water pump, the plunger holes are more than two, the number and the positions of the plunger rods 8 correspond to those of the plunger holes one to one, and meanwhile, in order to enable water in each lubricating space to flow mutually, the lubricating spaces of the two adjacent plunger holes are communicated through the water passing holes 15. In this embodiment, three plunger holes are provided as well as the plunger rod 8.
In order to form a complete circulating water path between the lubricating space and the water inlet chamber 3 and improve the water lubricating effect, the pump body 1 is provided with a water return channel 16, one end of the water return channel 16 is communicated with the lubricating space of one of the plunger holes, and the other end of the water return channel is communicated with the water inlet chamber 3.
In addition, in this embodiment, the first sealing ring 10 is located on a side of the plunger ring 9 close to the power chamber 2, the second sealing ring 11 is located on a side of the plunger ring 9 close to the high-pressure chamber 4, the second sealing ring 11 is a V-shaped sealing ring and includes a V-shaped sealing ring 17 and a support ring 18, the support ring 18 is located on a side of the sealing ring close to the high-pressure chamber 4, and the support ring 18 realizes axial sealing of the plunger rod 8 close to the high-pressure chamber 4 by means of the fitting fit between the V-shaped sealing ring 17 and the support ring 18.
Further, the first seal ring 10 is a Y-shaped seal ring or a U-shaped seal ring, and in this embodiment, the first seal ring 10 is a U-shaped seal ring.
Furthermore, in the present embodiment, the specific structure of the pump body 1 is: the pump body 1 comprises a crankcase body 19 and a pump head 20 fixed on the front end face of the crankcase body 19, the power chamber 2 and the crankshaft 6 are arranged on the crankcase body 19, the water inlet chamber 3 and the high-pressure chamber 4 are arranged on the pump head 20, a first sliding hole is formed in the front end face of the crankcase body 19, a second sliding hole corresponding to the first sliding hole is formed in the rear end face of the pump head 20, the plunger piston hole is formed between the first sliding hole and the second sliding hole, the rear end opening edge of the second sliding hole is recessed outwards along the radial direction to form a limiting groove, a positioning ring sleeve 21 is sleeved at the notch of the limiting groove, and a first sealing ring 10, a plunger piston ring 9 and a second sealing ring 11 are arranged between the front end face of the positioning ring sleeve 21 and the groove bottom face of the limiting groove.
In order to improve the axial sealing effect of the plunger rod 8 on the side close to the power chamber 2, the inner hole of the positioning ring sleeve 21 is a stepped hole and is sequentially provided with a small-diameter part 22 and a large-diameter part 23 from back to front, a positioning step is formed between the small-diameter part 22 and the large-diameter part 23, and the first sealing ring 10 is arranged between the plunger rod 8 and the large-diameter part 23, namely the outer diameter of the sealing surface of the first sealing ring 10 is shortened, and the contact stress of the first sealing ring 10 on the sealing surface is correspondingly increased.
Meanwhile, in order to prevent water in the lubricating space from flowing to the power chamber 2 from a gap between the positioning ring sleeve 21 and the limiting groove, a third sealing ring 24 is arranged between the positioning ring sleeve 21 and the limiting groove.
In order to improve the installation stability of the positioning ring sleeve 21, a positioning plate 25 is arranged between the front end surface of the crankcase body 19 and the rear end surface of the pump head 20, positioning through holes corresponding to two positions and the number of the through holes are formed in the positioning plate 25, the radius of each positioning through hole is slightly larger than that of each limiting groove, and the rear end surface of the positioning ring sleeve 21 is abutted against the front end surface of the positioning plate 25. Further, in the present embodiment, the outer edge of the rear end of the positioning ring sleeve 21 is recessed inward to form a positioning opening groove 26, the rear end of the positioning ring sleeve 21 is inserted into the positioning through hole, and the rear side surface of the positioning opening groove 26 is abutted against the front side surface of the positioning plate 25.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.
Claims (10)
1. The utility model provides a water lubricating structure of plunger water pump, including the pump body (1), set up power cavity (2) on the pump body (1), with water inlet chamber (3) of water inlet intercommunication, and high-pressure chamber (4) of delivery port intercommunication, through check valve (5) intercommunication between water inlet chamber (3) and the high-pressure chamber (4), through plunger hole intercommunication between power cavity (2) and high-pressure chamber (4), it is connected with bent axle (6) to rotate on power cavity (2), bent axle (6) are connected with plunger rod (8) transmission through connecting rod (7), plunger rod (8) sliding connection is downthehole at the plunger, and be provided with plunger ring (9) between plunger rod (8) and the plunger hole, a serial communication port: and a first sealing ring (10) and a second sealing ring (11) are respectively arranged between the plunger rod (8) and the plunger hole which are positioned at two sides of the plunger ring (9), a lubricating space is formed between the first sealing ring (10) and the second sealing ring (11), and a water injection channel (12) which is communicated with the lubricating space and the water inlet cavity (3) is arranged on the pump body (1).
2. The water lubricating structure of a plunger water pump according to claim 1, characterized in that: an annular groove (13) is formed in the inner annular wall of the plunger ring (9), and a water through hole (14) is formed in the side wall of the annular groove (13).
3. The water lubricating structure of a plunger water pump according to claim 1, characterized in that: the plunger holes are more than two, the number and the positions of the plunger rods (8) correspond to those of the plunger holes one to one, and the lubricating spaces of the two adjacent plunger holes are communicated through water passing holes (15).
4. The water lubricating structure of a plunger water pump according to claim 3, characterized in that: a water return channel (16) is formed in the pump body (1), one end of the water return channel (16) is communicated with the lubricating space of one of the plunger holes, and the other end of the water return channel is communicated with the water inlet cavity (3).
5. The water lubricating structure of a plunger water pump according to claim 1, characterized in that: the sealing ring I (10) is located on one side, close to the power chamber (2), of the plunger ring (9), the sealing ring II (11) is located on one side, close to the high-pressure chamber (4), of the plunger ring (9), the sealing ring II (11) is a V-shaped sealing ring and comprises a V-shaped sealing ring (17) and a supporting ring (18), and the supporting ring (18) is located on one side, close to the high-pressure chamber (4), of the sealing ring.
6. The water lubricating structure of a plunger water pump according to claim 5, characterized in that: the first sealing ring (10) is a Y-shaped sealing ring or a U-shaped sealing ring.
7. The water lubricating structure of a plunger water pump according to any one of claims 1 to 6, wherein: the pump body (1) comprises a crankcase body (19) and a pump head (20) fixed on the front end face of the crankcase body (19), the power cavity (2) and the crankshaft (6) are arranged on the crankcase body (19), the water inlet cavity (3) and the high-pressure cavity (4) are arranged on the pump head (20), a first sliding hole is formed in the front end face of the crankcase body (19), a second sliding hole corresponding to the first sliding hole is formed in the rear end face of the pump head (20), the plunger hole is formed between the first sliding hole and the second sliding hole, the rear end opening edge of the second sliding hole is recessed outwards along the radial direction to form a limiting groove, a positioning ring sleeve (21) is sleeved at the notch of the limiting groove, and a first sealing ring (10), a plunger ring (9) and a second sealing ring (11) are arranged between the front end face of the positioning ring sleeve (21) and the groove bottom face of the limiting groove.
8. The water lubricating structure of a plunger water pump according to claim 7, characterized in that: the inner hole of the positioning ring sleeve (21) is a stepped hole, the small diameter part (22) and the large diameter part (23) are sequentially arranged from back to front, a positioning step is formed between the small diameter part (22) and the large diameter part (23), and the first sealing ring (10) is arranged between the plunger rod (8) and the large diameter part (23).
9. The water lubricating structure of a plunger water pump according to claim 7, characterized in that: and a third sealing ring (24) is arranged between the positioning ring sleeve (21) and the limiting groove.
10. The water lubricating structure of a plunger water pump according to claim 7, characterized in that: be provided with locating plate (25) between the preceding terminal surface of crankcase body (19) and the rear end face of pump head (20), set up on locating plate (25) with the through-hole two positions and the corresponding positioning hole of quantity, and the radius of positioning hole slightly is greater than the radius of spacing groove, the rear end face of position ring cover (21) is inconsistent with the preceding terminal surface of locating plate (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922140863.XU CN211009060U (en) | 2019-12-03 | 2019-12-03 | Water lubricating structure of plunger water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922140863.XU CN211009060U (en) | 2019-12-03 | 2019-12-03 | Water lubricating structure of plunger water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211009060U true CN211009060U (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922140863.XU Active CN211009060U (en) | 2019-12-03 | 2019-12-03 | Water lubricating structure of plunger water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211009060U (en) |
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2019
- 2019-12-03 CN CN201922140863.XU patent/CN211009060U/en active Active
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