Plunger pump with plunger sealing piece

Abstract

The plunger pump comprises a driving motor and a pump body arranged on the driving motor, a plunger part is connected to the pump body in a sliding mode, the plunger part extends into or out of the pump body in a sliding mode, the pump body is provided with a sealing part, the sealing part is arranged around the periphery of the plunger part, and the sealing part is attached to the plunger part. According to the plunger pump, the sealing part is arranged around the periphery of the plunger part, a gap between the pump body and the plunger pump is sealed, meanwhile, the sealing part abuts against the periphery of the plunger part, impurities on the surface of the plunger part can be stripped conveniently in the contraction process of the plunger part, the situation that the impurities enter the pump body is reduced, and the service life of a sealing piece in the pump body is prolonged advantageously.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plunger pump, especially a plunger pump with plunger sealing element. BACKGROUND

[0002] The plunger pump is an important device of the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working cavity to realize oil suction and oil compression. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation.

[0003] The plunger sealing element is an important component of the plunger pump and the hydraulic system, which prevents liquid or gas from leaking between the plunger pump and the cylinder, and ensures the normal operation of the system.

[0004] When the plunger pump works in an environment with a large amount of dust, dust in the air is easy to adhere to the part of the plunger exposed to the air of the plunger pump. The dust adhered to the plunger is easy to enter the contact surface between the sealing element and the plunger with the piston movement of the plunger, which continuously wears the sealing element and the plunger, thereby reducing the service life of the sealing element, which needs to be improved. SUMMARY

[0005] In order to improve the service life of the sealing element in the plunger pump, the utility model provides a plunger pump with plunger sealing element.

[0006] The utility model is realized as follows:

[0007] A plunger pump with plunger sealing element, comprising a driving motor and a pump body provided on the driving motor, a plunger part is slidably connected to the pump body, the plunger part slides into or out of the pump body, the pump body is provided with a sealing part, the sealing part is arranged around the outer peripheral part of the plunger part, and the sealing part is attached to the plunger part.

[0008] Preferably, a support part is provided on the sealing part, and the support part is located in the sealing part.

[0009] Preferably, an elastic protruding strip is provided on the sealing part, and the elastic protruding strip is used for abutting against the plunger pump. When the elastic protruding strip is not under stress, the elastic protruding strip protrudes from the sealing part.

[0010] Preferably, a fixing surface and an abutting surface are formed on one end of the sealing part close to the pump body, the fixing surface is fixed to the pump body, and the fixing surface is located on the side of the abutting surface away from the plunger pump.

[0011] Preferably, an avoiding groove is formed on the pump body, the projection of the avoiding groove in the direction close to the sealing part is located in the abutting surface, the center of gravity of the support part is located on the abutting surface, and the avoiding surface is used for clamping the deformed sealing part.

[0012] Preferably, an annular surface is formed on the outer circumferential wall of the sealing part, and the annular surface is arranged in a tapering manner away from the pump body and abuts against the plunger part.

[0013] Preferably, a smooth surface coating is arranged on the inclined surface.

[0014] Preferably, an installation cavity is formed on the sealing part, an installation slot is formed on the sealing part, the installation slot is communicated with the installation cavity, the installation cavity is used for clamping the support part, and the installation slot is in a closed state when not under force.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. The utility model discloses a sealing part is arranged on the outer circumferential wall of the plunger part, and the gap between the pump body and the plunger pump is sealed, simultaneously, the sealing part abuts against the outer circumferential wall of the plunger part, which is convenient for stripping the impurities on the surface of the plunger part during the contraction of the plunger part, reduces the impurities into the pump body, and is favorable for prolonging the service life of the sealing part in the pump body.

[0017] 2. The utility model discloses an elastic convex strip is arranged on the sealing part, and the connecting surface and the abutting surface, the friction between the elastic convex strip and the plunger part is large during the contraction of the plunger part, makes the elastic convex strip move close to the pump body, and then makes the sealing part on the side, far away from the pump body of the elastic convex strip, deform and abut tightly the plunger part, and it is favorable for reducing the small impurities into the pump body, when the plunger part extends, the elastic convex strip abuts tightly the plunger part and makes the elastic convex strip move in the direction, far away from the pump body, and then makes the sealing part on the side, far away from the pump body of the elastic convex strip, deform and move away from the plunger pump, which is favorable for reducing the friction between the plunger part and the sealing part during the working of the plunger pump, and is favorable for prolonging the service life of the sealing part.

[0018] 3. The utility model discloses a support part is clamped into the installation cavity through the installation slot, when the sealing part is worn seriously, the support part on the sealing part is taken out, and the sealing part can be replaced, so that the whole does not need to be replaced, and the cost is reduced. DRAWINGS:

[0019] Figure 1 It is the overall structure schematic diagram of the utility model, mainly shows the structure of the sealing part.

[0020] Figure 2 It is the partial section view on the sealing part of the utility model, mainly shows the structure of the sealing part.

[0021] DRAWINGS: 1, drive motor;2, pump body;21, avoiding slot;3, plunger part;4, sealing part;41, annular surface;411, smooth surface coating;42, elastic convex strip;43, installation cavity;44, installation slot;45, fixed surface;46, abutting surface;5, support part. DETAILED DESCRIPTION

[0022] The utility model will be further described below with specific examples, referring to Figure 1 -2:

[0023] The application discloses a plunger pump with a plunger sealing element. The application discloses a plunger pump with a plunger sealing element, referring to Figure 1 and Figure 2 , comprising drive motor 1 and pump body 2, the plunger part 3 of pump body 2 is slidably connected, the drive motor 1 shell and pump body 2 pump shell fixed connection, drive motor 1 drives plunger part 3 to extend into or extend out of pump body 2. Drive motor 1 and plunger part 3 are located at the opposite sides of pump body 2 respectively, and the sealing part 4 is fixed on the pump body 2, the sealing part 4 is located on the side of the pump body 2 close to the plunger part 3, the sealing part 4 is arranged around the outer periphery of the plunger part 3, the sealing part 4 is annular, and the inner ring of the sealing part 4 is attached to the outer periphery of the plunger part 3. In the embodiment, the sealing part 4 is a rubber block.

[0024] Referring to Figure 1 and Figure 2 , the outer peripheral wall of the sealing part 4 is machined to form an annular surface 41, the annular surface 41 is arranged in a tapering manner away from the pump body 2, one end of the annular surface 41 away from the pump body 2 abuts against the outer wall of the plunger pump, and a smooth surface coating 411 is formed on the annular surface 41 to reduce the friction on the surface of the sealing part 4.

[0025] During the extension and retraction of the plunger part 3, the sealing part 4 is attached to the surface of the plunger part 3 to remove dust and impurities on the surface of the plunger part 3, the dust and impurities fall on the annular surface 41 and fall away from the plunger part 3 along the inclined direction of the annular surface 41. The smooth surface coating 411 reduces the friction on the surface of the annular surface 41, which is conducive to reducing the accumulation of dust and impurities on the surface of the sealing part 4.

[0026] Referring to Figure 1 and Figure 2The elastic protrusions 42 are fixed on the sealing part 4, are located on the inner ring of the sealing part 4, and abut against the outer periphery of the plunger part 3. The mounting cavity 43 and the mounting groove 44 are arranged on the sealing part 4, the mounting groove 44 is located on the side of the mounting cavity 43 away from the pump body 2, the mounting groove 44 is in communication with the mounting cavity 43. The supporting part 5 is fixed on the sealing part 4 and located in the mounting cavity 43. The supporting part 5 is clamped into the mounting cavity 43 through the mounting groove 44, and the supporting part 5 is used for supporting the sealing part 4. The projection of the elastic protrusions 42 in the direction parallel to the distribution direction of the sealing part 4 and the plunger part 3 is located on the supporting part 5. The supporting part 5 is fixedly connected with the pump body 2 through the sealing part 4. The supporting part 5 abuts against the sealing part 4 so that the sealing part 4 abuts against the elastic protrusions 42, and then the elastic protrusions 42 abut against the plunger part 3. When the elastic protrusions 42 abut against the plunger part 3, the inner ring surface of the sealing part 4 abuts against the plunger part 3. The gap between the plunger part 3 and the pump body 2 is sealed by the sealing part 4 and the elastic protrusions 42, which is beneficial to improve the sealing performance of the plunger pump. When the elastic protrusions 42 are not stressed, the elastic protrusions 42 protrude from the inner ring surface of the sealing part 4.

[0027] Referring to Figure 1 and Figure 2 The sealing part 4 is provided with a fixing surface 45 and an abutting surface 46 at the end close to the pump body 2. The fixing surface 45 and the abutting surface 46 are both flat surfaces, and are arranged around the outer periphery of the plunger part 3. The fixing surface 45 and the abutting surface 46 are away from the plunger part 3. The fixing surface 45 is fixedly connected with the pump body 2 by adhesion. The pump body 2 is provided with an avoiding groove 21 at the side close to the sealing part 4. The avoiding groove 21 is arranged around the outer periphery of the plunger part 3. The projection of the avoiding groove 21 in the direction parallel to the distribution direction of the pump body 2 and the sealing part 4 is located in the abutting surface 46. The avoiding groove 21 is used for clamping the sealing part 4 after deformation. The abutting surface 46 is used for abutting against the inner wall of the avoiding groove 21.

[0028] In the working process of the plunger pump, the sealing part 4 is attached to the surface of the plunger part 3, the friction between the elastic protrusions 42 and the plunger part 3 is greater than the friction between the sealing part 4 and the plunger part 3, and because the sealing part 4 is elastic, the plunger part 3 drives the elastic protrusions 42 to move close to or away from the pump body 2 in the process of stretching and retracting. When the plunger part 3 retracts, the plunger part 3 abuts against the elastic protrusions 42 to make the elastic protrusions 42 move towards the pump body 2, the elastic protrusions 42 extrude the sealing part 4 on the side of the elastic protrusions 42 close to the pump body 2 to make the sealing part 4 on the side of the elastic protrusions 42 close to the pump body 2 clamped into the avoiding groove 21, and the sealing part 4 on the side of the elastic protrusions 42 away from the pump body 2 abuts against the surface of the plunger part 3, so that impurities are not easy to enter the pump body 2 from the gap between the sealing part 4 and the plunger part 3. When the plunger part 3 extends out of the pump body 2, the plunger part 3 abuts against the elastic protrusions 42 to make the elastic protrusions 42 move away from the pump body 2, and then the sealing part 4 on the side of the elastic protrusions 42 close to the pump body 2 abuts against the plunger part 3, and the sealing part 4 on the side of the elastic protrusions 42 away from the pump body 2 deforms to release the plunger part 3, which is beneficial to reduce the wear degree of the end of the sealing part 4 away from the pump body 2 and improve the service life of the sealing part 4.

[0029] The plunger pump with the plunger sealing part has the advantages that in actual use, the sealing part 4 removes dust and impurities on the surface of the plunger part 3, so that impurities are not easy to enter the pump body 2 from the gap between the sealing part 4 and the plunger part 3. The elastic protrusions 42 are arranged, which is beneficial to improve the service life of the sealing part 4.

[0030] The above embodiment is only one of the preferred embodiments of the utility model, and does not limit the implementation range of the utility model, so that: equivalent changes made according to the shape, structure and principle of the utility model should be covered in the protection range of the utility model.

Claims

1. A plunger pump having a plunger seal, characterized by: The utility model provides a pump body (2) is located drive motor (1) on, the plunger part (3) is connected with slip on the pump body (2), the plunger part (3) slip goes into or goes out the pump body (2), the pump body (2) is equipped with sealing part (4), the sealing part (4) is located the plunger part (3) outer circumferential part setting, the sealing part (4) is pasted the plunger part (3).

2. A plunger pump having a plunger seal as defined in claim 1, characterized in that: Supporting part (5) is equipped on the sealing part (4), and the supporting part (5) is located in the sealing part (4).

3. A plunger pump having a plunger seal as defined in claim 2, wherein: Elastic convex stripe (42) is equipped on the sealing part (4), and the elastic convex stripe (42) is used to resist the plunger pump, when the elastic convex stripe (42) is not under stress, the elastic convex stripe (42) protrudes the sealing part (4).

4. A plunger pump having a plunger seal as defined in claim 3, wherein: The sealing part (4) is close to the one end of pump body (2) and is processed to form fixed surface (45) and abutting surface (46), the fixed surface (45) is fixed with the pump body (2), and the fixed surface (45) is located on the side, away from the pump body (2) of abutting surface (46).

5. A plunger pump having a plunger seal as defined in claim 4, wherein: The pump body (2) is equipped with the avoidance groove (21), and the projection of the avoidance groove (21) in the direction close to the sealing part (4) is located in the abutting surface (46), and the avoidance groove (21) is used for the sealing part (4) to be clamped after deformation.

6. A plunger pump having a plunger seal as defined in claim 1, wherein: The outer circumferential wall of the sealing part (4) is processed to form annular surface (41), the annular surface (41) is gradually tapered in the direction away from the pump body (2), and the annular surface (41) abuts the plunger part (3).

7. A plunger pump having a plunger seal as defined in claim 6, wherein: The annular surface (41) is equipped with smooth surface coating (411).

8. A plunger pump having a plunger seal as defined in claim 2, wherein: The sealing part (4) is opened in the installation cavity (43), the sealing part (4) is opened in the installation groove (44), the installation groove (44) is communicated with the installation cavity (43), the installation cavity (43) is used for the supporting part (5) to be clamped, and the installation groove (44) is in closed state when not under stress.

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