Low-noise and low-vibration plunger pump fluid end

Abstract

The invention provides a low-noise and low-vibration plunger pump fluid end which comprises a shell, an upper valve cover and a lower valve cover are sequentially arranged in the shell from top to bottom, a first bush is arranged on the surface of the upper valve cover, a second bush is arranged on the surface of the lower valve cover, a discharge valve seat is arranged in the shell and located below the upper valve cover, and a discharge valve is arranged in the shell and located below the lower valve cover. A fourth lining is arranged on the inner wall of the discharging valve seat, the suction valve seat is arranged in the shell and located below the lower valve cover, a fifth lining is arranged in the suction valve seat, and the bottom of the shell is connected with a supporting plate. According to the low-noise and low-vibration plunger pump fluid end, the multiple bushings are arranged in the device, the noise value can be effectively reduced when the whole device is used, meanwhile, the first bushing, the second bushing, the fourth bushing and the fifth bushing have the characteristics of abrasion resistance and high temperature resistance, the service life is longer, and the service life is prolonged. The spraying layer is arranged at the bottom of the supporting plate, so that the influence of the machining process on the vibration noise value is reduced, and the spraying layer has the damping effect.

Description

Technical Field

[0001] The invention relates to the field of pumps for offshore platforms, and in particular to a low-noise, low-vibration plunger pump hydraulic end. Background Art

[0002] A reciprocating pump is a positive displacement pump that relies on the reciprocating motion of a piston, plunger or diaphragm in a pump cylinder, causing the working volume of the pump cylinder to periodically expand and contract to suck and discharge liquid.

[0003] Generally, reciprocating pumps have the following problems when in use:

[0004] After the hydraulic end is connected to the power end, the hydraulic end is usually a cantilever structure. Due to the weight of the hydraulic end itself, the hydraulic end will vibrate relative to the power end during the operation of the pump.

[0005] The valve seat and valve core are steel-to-steel, which is prone to produce loud noise;

[0006] The hydraulic end parts are basically steel parts, which have no noise reduction effect, and the propagation speed in steel parts is faster;

[0007] Generally, plunger pumps only need to meet the national standards. Offshore platforms have higher requirements for plunger pumps than the national standards, and conventional reciprocating pumps often cannot meet the requirements. The hydraulic end, as a component of the plunger pump, is the part that is most likely to generate noise and vibration.

[0008] Therefore, it is necessary to provide a low-noise, low-vibration plunger pump hydraulic end to solve the above technical problems. Summary of the invention

[0009] The present invention provides a low-noise, low-vibration hydraulic end of a plunger pump, which solves the problem that after the hydraulic end is connected to the power end, the hydraulic end is usually a cantilever structure, due to the self-weight of the hydraulic end itself, the hydraulic end will vibrate relative to the power end during the operation of the pump, the valve seat and the valve core are in a steel-to-steel form, which is easy to generate large noise, the hydraulic end parts are basically steel parts, have no noise reduction effect, and the propagation speed in the steel parts is fast.

[0010] In order to solve the above technical problems, the present invention provides a low-noise, low-vibration plunger pump hydraulic end, comprising:

[0011] A housing, wherein an upper valve cover and a lower valve cover are sequentially arranged inside the housing from top to bottom, a first bushing is arranged on the surface of the upper valve cover, and a second bushing is arranged on the surface of the lower valve cover;

[0012] a discharge valve seat, the discharge valve seat being arranged inside the housing and below the upper valve cover, and the inner wall of the discharge valve seat being provided with a fourth bushing;

[0013] A suction valve seat is arranged inside the shell and below the lower valve cover. A fifth bushing is arranged inside the suction valve seat. A support plate is connected to the bottom of the shell.

[0014] Preferably, the top of the shell is connected to a cylinder cover via threads.

[0015] Preferably, a third bushing is provided inside the cylinder head.

[0016] Preferably, the bottom of the support plate is coated with a spray coating.

[0017] Preferably, the support plate is used to adjust the bottom of the entire device to be flush and reduce the vibration of the entire device.

[0018] Preferably, two splicing shells are arranged inside the upper valve cover and the lower valve cover, and movable components are arranged inside the two splicing shells.

[0019] Preferably, the movable assembly comprises an annular movable plate, and a movable shell is symmetrically connected to the surface of the annular movable plate.

[0020] Preferably, a spring is arranged inside the two splicing shells and below the annular movable plate, and fixing blocks are connected to opposite sides of the two disassembly shells, and bolts are arranged between the fixing blocks.

[0021] Preferably, a positioning assembly is provided between the cylinder head and the third bushing, the positioning assembly comprises an annular positioning groove, an annular positioning block is provided inside the annular positioning groove, and the annular positioning block is connected to the surface of the third bushing.

[0022] Preferably, a plug-in / pull-out assembly is provided between the cylinder head and the third bushing, the plug-in / pull-out assembly comprises a plug-in / pull-out block, and a plug-in / pull-out hole matched with the plug-in / pull-out block is formed on the top of the inner wall of the cylinder head.

[0023] Compared with the related art, the low-noise, low-vibration plunger pump hydraulic end provided by the present invention has the following beneficial effects:

[0024] The present invention provides a low-noise, low-vibration plunger pump hydraulic end, wherein a first bushing is arranged on the surface of an upper valve cover, a second bushing is arranged on the surface of a lower valve cover, a fourth bushing is arranged inside a discharge valve seat, and a fifth bushing is arranged inside a suction valve seat, so that the noise value can be effectively reduced when the entire device is in use; at the same time, the first bushing, the second bushing, the fourth bushing and the fifth bushing have the characteristics of wear resistance and high temperature resistance, a wider range of applications and a longer service life; a spray layer is arranged at the bottom of a support plate to reduce the influence of a processing process on the vibration noise value, and the spray layer has a shock-absorbing effect, so as to further achieve the effect of reducing vibration and noise from all aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a first embodiment of a low-noise, low-vibration plunger pump hydraulic end provided by the present invention;

[0026] Figure 2 for Figure 1 The structural schematic diagram of the cylinder head and the third bushing shown;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the upper valve cover and the first bushing shown;

[0028] Figure 4 for Figure 1 A schematic diagram of the structure of the discharge valve seat and the fourth bushing shown;

[0029] Figure 5 for Figure 1 A schematic diagram of the structure of the suction valve seat and the fifth bushing shown;

[0030] Figure 6 A schematic structural diagram of a second embodiment of a low-noise, low-vibration plunger pump hydraulic end provided by the present invention;

[0031] Figure 7 for Figure 6 The three-dimensional structure schematic diagram of the overall device from a first viewing angle is shown;

[0032] Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure of the overall device from a second viewing angle is shown;

[0033] Fig. 9 for Figure 7 A schematic diagram of the three-dimensional structure of the overall device from a third viewing angle is shown;

[0034] Fig.10 A schematic structural diagram of a third embodiment of a low-noise, low-vibration plunger pump hydraulic end provided by the present invention;

[0035] Fig.11 for Fig.10 An enlarged schematic diagram of part A is shown.

[0036] Numbers in the figure: 1, housing; 2, upper valve cover; 3, lower valve cover; 4, discharge valve seat; 5, suction valve seat; 6, cylinder head; 7, first bushing; 8, second bushing; 9, third bushing; 10, fourth bushing; 11, fifth bushing; 12, support plate; 13, spray layer; 14, spliced ​​shell;

[0037] 15. movable assembly; 151. annular movable plate; 152. movable shell;

[0038] 16. Spring; 17. Fixing block; 18. Bolt;

[0039] 19. positioning assembly; 191. annular positioning groove; 192. annular positioning block;

[0040] 20. Plug-in assembly; 201. Plug-in block; 202. Plug-in jack. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0042] First embodiment

[0043] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic structural diagram of a first embodiment of a low-noise, low-vibration plunger pump hydraulic end provided by the present invention; Figure 2 for Figure 1 The structural schematic diagram of the cylinder head and the third bushing shown; Figure 3 for Figure 1 A schematic diagram of the structure of the upper valve cover and the first bushing shown; Figure 4 for Figure 1 A schematic diagram of the structure of the discharge valve seat and the fourth bushing shown; Figure 5 for Figure 1 A low-noise, low-vibration plunger pump hydraulic end, comprising:

[0044] A housing 1, wherein an upper valve cover 2 and a lower valve cover 3 are sequentially arranged inside the housing 1 from top to bottom, a first bushing 7 is arranged on the surface of the upper valve cover 2, and a second bushing 8 is arranged on the surface of the lower valve cover 3;

[0045] A discharge valve seat 4, wherein the discharge valve seat 4 is arranged inside the housing 1 and below the upper valve cover 2, and a fourth bushing 10 is arranged on the inner wall of the discharge valve seat 4;

[0046] The suction valve seat 5 is arranged inside the housing 1 and below the lower valve cover 3 . A fifth bushing 11 is arranged inside the suction valve seat 5 . A support plate 12 is connected to the bottom of the housing 1 .

[0047] The material of the first bushing 7, the second bushing 8 and the third bushing 9 can be rubber. Since rubber material has high elasticity and damping properties, when the reciprocating pump generates vibration during operation, the rubber shock-absorbing pad undergoes elastic deformation during the pressure process, and the vibration energy is converted into heat energy for dissipation through the friction between rubber molecules and the friction between the rubber and the pump body and the foundation. At the same time, it can effectively isolate the transmission of pump body vibration to the foundation.

[0048] The top of the housing 1 is connected to a cylinder cover 6 via threads.

[0049] A third bushing 9 is disposed inside the cylinder head 6 .

[0050] The bottom of the support plate 12 is coated with a spray layer 13 .

[0051] The material of the fourth bushing 10 and the fifth bushing 11 can be glass wool felt or mineral wool felt. There are many tiny pores inside the glass wool felt and mineral wool felt. When the noise generated by the operation of the hydraulic end (such as the impact sound generated by the opening and closing of the valve, the noise generated by the flow of liquid) propagates outward, the sound waves enter the pores of the sound-absorbing material, causing the air in the pores to vibrate. The friction between the air and the pore wall and the viscous resistance of the air itself will convert the sound energy into heat energy, thereby achieving the purpose of sound absorption and noise reduction.

[0052] The support plate 4 is used to adjust the bottom of the entire device to be flush and reduce the vibration of the entire device.

[0053] The material of the spray coating 13 can be a damping coating. When the component vibrates, the damping coating will produce tensile-compression deformation or shear deformation along with the vibration of the component. In this process, the intermolecular friction inside the coating and the friction between the coating and the surface of the component will consume the vibration energy, thereby reducing the noise generated by the vibration of the power end component.

[0054] A support plate 12 is added to the bottom of the hydraulic end so that the hydraulic end is flush with the bottom of the power end frame and can be tightened together on the base. In actual use, the bottom surface of the power end and the hydraulic end housing can be connected and milled as a whole to ensure the parallelism of the bottom surface, thereby reducing the vibration of the entire pump group.

[0055] The contact surface between the discharge valve seat 4 and the suction valve seat 5 and the valve core is made of non-metallic composite material, which can reduce the noise of the hydraulic end during operation;

[0056] The hydraulic end valve cover and cylinder head adopt new non-metallic materials with noise reduction effect on the inner and outer linings, which can effectively absorb the noise generated by the impact between the valve seat and the valve core, thus achieving the effect of noise reduction;

[0057] In order to ensure that the hydraulic end and the power end can have the same nominal size and reduce the gap caused by the difference in the flatness of the anchor, we spray a layer of soft composite material on the bottom surface of the support plate, which can effectively reduce the gap between the two anchor planes and play a role in buffering the vibration, thereby further reducing vibration noise.

[0058] A support plate is added to the bottom of the pump head at the hydraulic end of the pump to ensure that the power end and the hydraulic end feet are at the same height, reducing the impact of the previous cantilever structure on the vibration and noise of the pump;

[0059] The outer circle and inner hole of the hydraulic end cylinder cover are dug with stoppers and lined with new noise reduction materials;

[0060] The outer circle of the hydraulic end valve cover is machined with a stop and lined with a new type of noise reduction material;

[0061] The contact surface between the valve seat and the valve core is lined with a new noise reduction material;

[0062] The hydraulic end support plate is sprayed with non-metallic composite materials, which can effectively reduce the gap between the support plate and the base plane and buffer vibration, achieving the effect of vibration reduction and noise reduction.

[0063] Adding a support plate to the bottom of the pump head at the hydraulic end of the pump is done by adjusting the structure, increasing support and reducing vibration;

[0064] The contact surface between the valve seat and the valve core is lined with a new noise reduction material. This method uses new materials to reduce the generation of noise sources;

[0065] New noise reduction materials for hydraulic end valve cover and cylinder head lining This method uses new materials to reduce the conduction of sound, thereby achieving the effect of noise reduction;

[0066] The hydraulic end support plate is sprayed with non-metallic composite materials. This method reduces the vibration of the hydraulic end by reducing the gap between the contact surfaces and improving the flatness.

[0067] Compared with the related art, the low-noise, low-vibration plunger pump hydraulic end provided by the present invention has the following beneficial effects:

[0068] The present invention provides a low-noise, low-vibration plunger pump hydraulic end, wherein a first bushing 7 is arranged on the surface of an upper valve cover 2, a second bushing 8 is arranged on the surface of a lower valve cover 3, a fourth bushing 10 is arranged inside a discharge valve seat 4, and a fifth bushing 11 is arranged inside a suction valve seat 5, so that the noise value can be effectively reduced when the entire device is in use. Meanwhile, the first bushing 7, the second bushing 8, the fourth bushing 10 and the fifth bushing 11 have the characteristics of wear resistance and high temperature resistance, and have a wider range of applications and a longer service life. A spray layer 13 is arranged at the bottom of a support plate 14 to reduce the influence of a processing process on the vibration noise value, and the spray layer 13 has a shock-absorbing effect, which further achieves the effect of reducing vibration and noise from all aspects.

[0069] Second embodiment

[0070] Please refer to Figure 6 , Figure 7 , Figure 8 and Fig. 9 Based on the low-noise, low-vibration plunger pump hydraulic end provided by the first embodiment of the present application, the second embodiment of the present application proposes another low-noise, low-vibration plunger pump hydraulic end. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0071] Specifically, the second embodiment of the present application provides a low-noise, low-vibration plunger pump hydraulic end, which is different in that two splicing shells 14 are arranged inside the upper valve cover 2 and the lower valve cover 3, and movable components 15 are arranged inside the two splicing shells 14.

[0072] The movable assembly 15 includes an annular movable plate 151 , and a movable shell 152 is symmetrically connected to the surface of the annular movable plate 151 .

[0073] The two disassembly shells 14 can be spliced ​​together to form a complete shell. The annular movable plate 151 and the two movable shells 152 are all arranged inside the two disassembly shells 152. When in use, when the two movable shells 152 are squeezed downward, the annular movable plate 151 is pushed to move downward. When the annular movable plate 151 moves downward, it squeezes the spring 16 to play a buffering role.

[0074] A spring 16 is disposed inside the two splicing shells 14 and below the annular movable plate 151 . Fixed blocks 17 are connected to opposite sides of the two disassembly shells 14 . Bolts 18 are disposed between the multiple fixed blocks 17 .

[0075] The working principle of the low-noise, low-vibration plunger pump hydraulic end provided by the present invention is as follows:

[0076] When using, when the spring 16 is replaced, first remove the bolts 18 between the multiple fixing blocks 17 on the two disassembly shells 14. After the bolts 18 are removed, the two disassembly shells 14 are pulled open to remove the spring 16 at the bottom of the annular movable plate 151.

[0077] Compared with the related art, the low-noise, low-vibration plunger pump hydraulic end provided by the present invention has the following beneficial effects:

[0078] The present invention provides a low-noise, low-vibration plunger pump hydraulic end, in which two disassembly shells 14, an annular movable plate 151 with two movable shells 152, a spring 16, a plurality of fixing blocks 17 and a plurality of bolts 18 are arranged inside an upper valve cover 2 and a lower valve cover 3 for use together, so that the spring 16 can be conveniently disassembled and replaced after reaching fatigue limit or breaking due to material defects after long-term use.

[0079] Third embodiment

[0080] Please refer to Fig.10 and Fig.11Based on the low-noise, low-vibration plunger pump hydraulic end provided by the first embodiment of the present application, the third embodiment of the present application proposes another low-noise, low-vibration plunger pump hydraulic end. The third embodiment is only a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0081] Specifically, the difference of a low-noise, low-vibration plunger pump hydraulic end provided in the third embodiment of the present application is that, in a low-noise, low-vibration plunger pump hydraulic end, a positioning assembly 19 is arranged between the cylinder head 6 and the third bushing 9, and the positioning assembly 19 includes an annular positioning groove 191, and an annular positioning block 192 is arranged inside the annular positioning groove 191, and the annular positioning block 192 is connected to the surface of the third bushing 9.

[0082] The annular positioning groove 191 is opened on the inner wall of the cylinder head 6, the plug-in block 201 is connected to the center position of one end of the third bushing 9, and a rubber pad is bonded to the inner wall of the plug-in hole 202. The use of the rubber pad can increase the friction and extrusion limiting effect when the plug-in block 201 is installed in the plug-in hole 202.

[0083] A plug-in assembly 20 is provided between the cylinder head 6 and the third bushing 9 . The plug-in assembly 20 includes a plug-in block 201 . A plug-in hole 202 matched with the plug-in block 201 is provided on the top of the inner wall of the cylinder head 6 .

[0084] The working principle of the low-noise, low-vibration plunger pump hydraulic end provided by the present invention is as follows:

[0085] During use, when the third bushing 9 that is worn out after long-term use is replaced, the annular positioning block 192 is separated from the annular positioning groove 191 on the inner wall of the cylinder head 6 by pulling the third bushing 9, and at the same time, the plug-in block 201 at one end of the third bushing 9 is separated from the plug-in hole 202 at the top of the inner wall of the cylinder head 6, and the third bushing 9 can be taken out and replaced.

[0086] Compared with the related art, the low-noise, low-vibration plunger pump hydraulic end provided by the present invention has the following beneficial effects:

[0087] The present invention provides a low-noise, low-vibration plunger pump hydraulic end. The annular positioning groove 191, the annular positioning block 192 and the plug-in assembly 20 between the cylinder head 6 and the third bushing 9 can be simply and quickly disassembled and replaced when the third bushing 9 is worn after long-term use, saving repair time and maintenance costs.

[0088] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low noise, low vibration plunger pump hydraulic end, characterized in that: include: A housing, wherein an upper valve cover and a lower valve cover are sequentially arranged inside the housing from top to bottom, a first bushing is arranged on the surface of the upper valve cover, and a second bushing is arranged on the surface of the lower valve cover; a discharge valve seat, the discharge valve seat being arranged inside the housing and below the upper valve cover, and the inner wall of the discharge valve seat being provided with a fourth bushing; A suction valve seat is arranged inside the shell and below the lower valve cover. A fifth bushing is arranged inside the suction valve seat. A support plate is connected to the bottom of the shell.

2. The low noise and low vibration plunger pump hydraulic end according to claim 1, characterized in that: The top of the shell is connected with a cylinder cover through threads.

3. The low noise and low vibration plunger pump hydraulic end according to claim 2, characterized in that: A third bushing is arranged inside the cylinder head.

4. The low noise and low vibration plunger pump hydraulic end according to claim 1, characterized in that: The bottom of the support plate is coated with a spray coating.

5. The low noise and low vibration plunger pump hydraulic end according to claim 1, characterized in that: The support plate is used to adjust the bottom of the entire device to be flush and reduce the vibration of the entire device.

6. The low noise and low vibration plunger pump hydraulic end according to claim 1, characterized in that: Two splicing shells are arranged inside the upper valve cover and the lower valve cover, and movable components are arranged inside the two splicing shells.

7. The low noise and low vibration plunger pump hydraulic end according to claim 6, characterized in that: The movable assembly comprises an annular movable plate, and a movable shell is symmetrically connected to the surface of the annular movable plate.

8. The low noise and low vibration plunger pump hydraulic end according to claim 7, characterized in that: A spring is arranged inside the two splicing shells and below the annular movable plate. The opposite sides of the two disassembly shells are connected with fixing blocks, and bolts are arranged between the fixing blocks.

9. The low noise and low vibration plunger pump hydraulic end according to claim 3, characterized in that: A positioning assembly is arranged between the cylinder head and the third bushing. The positioning assembly includes an annular positioning groove. An annular positioning block is arranged inside the annular positioning groove. The annular positioning block is connected to the surface of the third bushing.

10. The low noise and low vibration plunger pump hydraulic end according to claim 9, characterized in that: A plug-in / pull-out assembly is provided between the cylinder cover and the third bushing. The plug-in / pull-out assembly comprises a plug-in / pull-out block. A plug-in / pull-out hole matched with the plug-in / pull-out block is provided on the top of the inner wall of the cylinder cover.

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