CN113446204B

CN113446204B - Pump vibration damping structure

Info

Publication number: CN113446204B
Application number: CN202010218801.0A
Authority: CN
Inventors: 卢连苗; 卢勃; 杨军明; 陈建荣; 劳科奇
Original assignee: Nningbo Qiangsheng Electric Motor Co ltd
Current assignee: Nningbo Qiangsheng Electric Motor Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2023-06-06
Anticipated expiration: 2040-03-25
Also published as: CN113446204A

Abstract

The invention discloses a pump vibration reduction structure, and relates to the technical field of diaphragm pumps; including the damping spring that is located the pump, the pump includes the casing, be located the diaphragm that is used for absorbing water and drainage in the casing, a plurality of pistons that are used for driving the diaphragm motion, be used for supporting the piston support, be used for driving the drive shaft of piston support motion, the piston is located piston support up end, the outer fringe at the lower terminal surface of piston support is connected to damping spring upper end, damping spring lower extreme is connected in the casing bottom, drive shaft connection is in the middle part of piston support, the distance of piston and drive shaft is less than damping spring and drive shaft's distance. The invention provides a pump vibration reduction structure, wherein a piston support is uniformly stressed and reduces the vibration of a pump; long service life.

Description

Pump vibration damping structure

Technical Field

The invention belongs to the technical field of diaphragm booster pumps of water purifiers, and particularly relates to a diaphragm pump vibration reduction structure.

Background

The principle of the diaphragm pump is that a driving shaft is used for driving a piston support, and the piston support drives a piston and a diaphragm to move, so that water is discharged.

The traditional piston support only bears the pressure transmitted by the diaphragm by the driving shaft, so that the piston support is unevenly stressed and is easy to damage, the service life of the pump is short, and in addition, the vibration and the noise are larger.

Disclosure of Invention

The invention aims to overcome the defects of uneven stress and obvious vibration of a piston support of the existing pump, and provides a pump vibration reduction structure, wherein the stress of the piston support is even, and the vibration of the pump is reduced.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a pump damping structure, includes the damping spring that is located the pump, the pump includes the casing, is located the diaphragm that is used for absorbing water and drainage, a plurality of pistons that are used for driving the diaphragm motion, the piston support that is used for supporting the piston, the drive shaft that is used for driving piston support motion, the piston is located piston support up end, the outer fringe at piston support's lower terminal surface is connected to damping spring upper end, the damping spring lower extreme is connected in the casing bottom, the drive shaft is connected at piston support's middle part, the distance of piston and drive shaft is less than damping spring and drive shaft's distance. When the piston moves upwards, the piston support bears downward pressure at the piston, the traditional piston support only bears pressure by the driving shaft, so that the stress of the piston support is uneven, the vibration reduction spring is added at the outer edge of the piston support, and when the piston moves upwards, the vibration reduction spring provides upward supporting force for the piston support, so that the piston support can be supported at the driving shaft and the vibration reduction spring, and the stress is even; the piston is located the centre of drive shaft and damping spring, and the piston support atress is reasonable, and in addition, the piston support is when reciprocating, and vibration and noise are great, and the spring can the damping noise reduction.

Preferably, the space above the diaphragm in the pump is a fluid chamber, and the pump further comprises a first partition plate, a second partition plate, a first through hole, a second through hole, a water absorption valve plate, a water drainage valve plate, a water inlet and a water outlet, wherein the first partition plate is positioned in the fluid chamber and divides the fluid chamber into an upper cavity and a lower cavity, the second partition plate is positioned on the upper side of the first partition plate and divides the upper cavity into a water absorption cavity and a water drainage cavity, the first through hole is positioned at the bottom of the water absorption cavity, the second through hole is positioned at the bottom of the water drainage cavity, the water absorption valve plate is attached to the lower side of the first through hole, the water drainage valve plate is attached to the upper side of the second through hole, the water inlet is positioned on the shell and is communicated with the water absorption cavity, and the water outlet is positioned on the shell and is communicated with the water drainage cavity. The structure is simple.

Preferably, the upper end of the damping spring is inserted with an upper limit column fixedly connected with a piston support, and the lower end of the damping spring is inserted with a lower limit column fixedly connected with the bottom of the shell. The stability of the damping spring is ensured.

Preferably, the top of the shell is provided with an overflow port at a position corresponding to the drainage cavity, the upper side of the top of the shell is provided with a water-discharging groove, a water return port communicated with the water-absorbing cavity is arranged in the water-discharging groove, the overflow port and the upper cover of the water-discharging groove are provided with pressure limiting valve plates, the edges of the pressure limiting valve plates are fixedly connected to the shell, the upper side of the pressure limiting valve plates is abutted against a pressing block, and the pressing block is connected with a pressure limiting spring for pressing the pressing block to the pressure limiting valve plates. The excessive water pressure in the drainage cavity is prevented.

Preferably, the top of the shell is provided with a clamping groove and a supporting sleeve matched with the clamping groove, the supporting sleeve is covered on the pressing block and the pressure limiting spring, the lower end of the supporting sleeve is matched with the clamping groove and is clamped with the clamping groove, the pressure limiting valve piece is positioned in the clamping groove and is extruded on the shell by the supporting sleeve, the upper end of the pressure limiting spring is connected to the upper end of the supporting sleeve, and the lower end of the pressure limiting spring is connected to the pressing block. The structure is simple.

Preferably, the cylinder body is fixedly connected to the upper end of the supporting sleeve, the cylinder body piston is connected to the upper end of the supporting sleeve in a sliding mode, the piston rod is inserted into the upper end of the supporting sleeve, the lower end of the piston rod is fixedly connected to the pressing block, the upper end of the piston rod is fixedly connected to the cylinder body piston, the cylinder body piston is provided with a one-way valve facing the upper side of the cylinder body piston in the direction, the upper end of the cylinder body is provided with an air tap, and the upper end of the air tap is sleeved with a pressure limiting valve. The stress of the pressure limiting spring is reduced by high-pressure air, so that the service life of the pressure limiting spring is prolonged.

Preferably, the air tap is in threaded connection with the cylinder body. The pressing block can be locked by rotating the air tap, so that enough water outlet pressure is ensured.

The beneficial effects of the invention are as follows: the invention provides a pump vibration reduction structure, wherein a piston support is uniformly stressed and reduces the vibration of a pump; long service life.

Drawings

FIG. 1 is a schematic illustration of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

fig. 3 is a schematic diagram of the present invention with the addition of a cylinder and cylinder piston.

In the figure: damping spring 1, casing 2, diaphragm 3, piston 4, piston support 5, drive shaft 6, upper spacing post 7, lower spacing post 8, first baffle 9, water absorbing chamber 10, water discharging chamber 11, second baffle 12, first via hole 13, second via hole 14, water absorbing valve plate 15, water discharging valve plate 16, water inlet 17, water outlet 18, overflow port 19, water drain tank 20, water return port 21, pressure limiting valve plate 22, briquetting 23, pressure limiting spring 24, support sleeve 25, clamping groove 26, cylinder 27, cylinder piston 28, piston rod 29, check valve 30, air tap 31, pressure limiting valve 32.

Detailed Description

The invention is further described in detail below with reference to the attached drawings and detailed description:

examples:

referring to fig. 1 to 3, a pump vibration damping structure comprises a vibration damping spring 1 positioned in a pump, wherein the pump comprises a shell 2, a diaphragm 3 positioned in the shell 2 and used for absorbing water and draining water, a plurality of pistons 4 used for driving the diaphragm 3 to move, a piston support 5 used for supporting the pistons 4, and a driving shaft 6 used for driving the piston support 5 to move, the pistons 4 are positioned on the upper end face of the piston support 5, the upper end of the vibration damping spring 1 is connected to the outer edge of the lower end face of the piston support 5, the lower end of the vibration damping spring 1 is connected to the bottom of the shell 2, the driving shaft 6 is connected to the middle part of the piston support 5, and the distance between the pistons 4 and the driving shaft 6 is smaller than the distance between the vibration damping spring 1 and the driving shaft 6; the upper end of the damping spring 1 is inserted with an upper limit column 7 fixedly connected with a piston bracket 5, and the lower end of the damping spring 1 is inserted with a lower limit column 8 fixedly connected with the bottom of the shell 2.

The space above the diaphragm 3 in the pump is a fluid chamber, and the pump also comprises a first baffle 9, a second baffle 12, a first through hole 13, a second through hole 14, a water absorbing valve plate 15, a water draining valve plate 16, a water inlet 17, a water outlet 18, and a water outlet 18, wherein the first baffle 9 is positioned in the fluid chamber and divides the fluid chamber into an upper cavity and a lower cavity, the second baffle 12 is positioned on the upper side of the first baffle 9 and divides the upper cavity into a water absorbing cavity 10 and a water draining cavity 11, the first through hole 13 is positioned at the bottom of the water absorbing cavity 10, the second through hole 14 is positioned at the bottom of the water draining cavity 11, the water absorbing valve plate 15 is attached to the lower side of the first through hole 13, the water draining valve plate 16 is attached to the upper side of the second through hole 14, the water inlet 17 is positioned on the shell 2 and is communicated with the water absorbing cavity 10, and the water outlet 18 is positioned on the shell 2 and is communicated with the water draining cavity 11; an overflow port 19 is arranged at the top of the shell 2 at a position corresponding to the drainage cavity 11, a lower water tank 20 is arranged at the upper side of the top of the shell 2, a water return port 21 communicated with the water suction cavity 10 is arranged in the lower water tank 20, a pressure limiting valve piece 22 is arranged on the overflow port 19 and the lower water tank 20 in a covering manner, the edge of the pressure limiting valve piece 22 is fixedly connected to the shell 2, a pressing block 23 is abutted against the upper side of the pressure limiting valve piece 22, and a pressure limiting spring 24 for pressing the pressing block 23 to the pressure limiting valve piece 22 is connected to the pressing block 23; the top of the shell 2 is provided with a clamping groove 26 and a supporting sleeve matched with the clamping groove 26, the supporting sleeve is covered on the pressing block 23 and the pressure limiting spring 24, the lower end of the supporting sleeve is matched with the clamping groove 26 and is clamped with the clamping groove 26, the pressure limiting valve piece 22 is positioned in the clamping groove 26 and is extruded on the shell 2 by the supporting sleeve, the upper end of the pressure limiting spring 24 is connected with the upper end of the supporting sleeve, and the lower end of the pressure limiting spring 24 is connected with the pressing block 23; the upper end of the supporting sleeve is fixedly connected with a cylinder body 27, a cylinder body piston 28 is connected with the upper end of the cylinder body 27 in a sliding way, a piston rod 29 is inserted into the upper end of the supporting sleeve, the lower end of the piston rod 29 is fixedly connected to the pressing block 23, the upper end of the piston rod 29 is fixedly connected to the cylinder body piston 28, a one-way valve 30 which faces the upper side of the cylinder body piston 28 in the direction is arranged on the cylinder body piston 28, an air tap 31 is arranged at the upper end of the cylinder body 27, and a pressure limiting valve 32 is sleeved at the upper end of the air tap 31; the air tap 31 is screwed with the cylinder 27.

Principles of the embodiment:

when the pump is in operation, the driving shaft 6 drives the piston 4 to move up and down, when the piston 4 moves down, the volume of the lower cavity is enlarged, at the moment, the water absorbing valve plate 15 is separated from the first through hole 13, water enters the lower cavity after passing through the water inlet 17, the water absorbing cavity 10 and the first through hole 13, then the piston 4 moves up, the water absorbing valve plate 15 is attached to the first through hole 13 again, the water discharging valve plate 16 is separated from the second through hole 14, and water is compressed into the water discharging cavity 11 from the lower cavity through the second through hole 14 under high pressure so as to go out from the water outlet 18.

In the process, when the piston moves upwards, the piston support bears downward pressure at the piston, the traditional piston support only bears pressure by the driving shaft 6, so that the piston support is stressed unevenly, the damping spring 1 is added at the outer edge of the piston support, and when the piston moves upwards, the damping spring 1 provides upward supporting force for the piston support, so that the piston support can be supported at the driving shaft 6 and the damping spring 1, and the stress is even; in addition, when the piston support moves up and down, vibration and noise are larger, and the spring can reduce vibration and noise.

In addition, when water is pressed out, the pressure in the drainage cavity 11 is easy to be larger, and at the moment, the resistance of the driving shaft 6 is also easy to be larger, so that the service life of the pump is easy to be greatly reduced; in this embodiment, when the pressure in the drainage chamber 11 is too high, the pressure limiting valve 22 moves upward to push the pressing block 23 open, the pressure limiting spring 24 contracts, the pressure limiting valve 22 is separated from the overflow port 19 and the drainage chamber 20, and a part of water in the drainage chamber 11 is discharged from the overflow port 19 and is drained into the water suction chamber 10 again through the drainage chamber 20, so that the water pressure in the drainage chamber 11 is reduced.

When the pump works under high load, the water pressure in the water discharge cavity 11 is always in an excessively high state, the pressure limiting spring 24 is in a state of repeatedly expanding and contracting in the upper time, and the pressure limiting spring 24 is easy to fail; an improvement is proposed.

When the pressing block 23 moves up and down, the piston rod 29 is driven to move up and down, air continuously enters the cylinder 27 through the one-way valve 30, so that the air pressure in the cylinder 27 is continuously increased, the downward pressure of the pressing block 23 by the piston rod 29 is increased, the pressure of the pressure limiting spring 24 is greatly reduced, and the service life of the pressure limiting spring 24 is greatly prolonged.

When the air pressure in the cylinder 27 reaches a certain level, the air in the cylinder 27 is discharged from the pressure limiting valve 32 through the air tap 31.

Although the pressure limiting valve 22 can reduce the pressure of the drainage chamber 11, the outlet pressure of the water outlet 18 can be reduced. When a larger water outlet pressure is needed, the air tap 31 is rotated, the air tap abuts against the upper side of the cylinder piston 28, the pressing block 23 abuts against the pressure limiting valve piece 22, so that the pressure limiting valve piece 22 is prevented from deforming, the pressure in the water discharging cavity is not reduced, and the water outlet pressure of the water outlet 18 is ensured.

Claims

1. The vibration reduction structure of the pump is characterized by comprising a vibration reduction spring positioned in the pump, wherein the pump comprises a shell, a diaphragm positioned in the shell and used for absorbing water and draining water, a plurality of pistons used for driving the diaphragm to move, a piston support used for supporting the pistons, and a driving shaft used for driving the piston support to move, the pistons are positioned on the upper end face of the piston support, the upper end of the vibration reduction spring is connected to the outer edge of the lower end face of the piston support, the lower end of the vibration reduction spring is connected to the bottom of the shell, the driving shaft is connected to the middle part of the piston support, and the distance between the pistons and the driving shaft is smaller than the distance between the vibration reduction spring and the driving shaft; the pump comprises a diaphragm, a first partition plate, a second partition plate, a first through hole, a second through hole, a water absorption valve plate, a water drainage valve plate, a water inlet, a water outlet and a water outlet, wherein the space above the diaphragm is a fluid chamber; the upper end of the damping spring is inserted with an upper limit column fixedly connected with a piston support, and the lower end of the damping spring is inserted with a lower limit column fixedly connected with the bottom of the shell.

2. The pump vibration reduction structure according to claim 1, wherein the top of the shell is provided with an overflow port at a position corresponding to the drainage cavity, the upper side of the top of the shell is provided with a water-down tank, a water return port communicated with the water-absorbing cavity is arranged in the water-down tank, the overflow port and the upper cover of the water-down tank are provided with pressure limiting valve plates, the edges of the pressure limiting valve plates are fixedly connected to the shell, the upper side of the pressure limiting valve plates is abutted against a pressing block, and the pressing block is connected with a pressure limiting spring for pressing the pressing block to the pressure limiting valve plates.

3. The pump vibration reduction structure according to claim 2, wherein the top of the housing is provided with a clamping groove and a supporting sleeve matched with the clamping groove, the supporting sleeve is covered on the pressing block and the pressure limiting spring, the lower end of the supporting sleeve is matched with the clamping groove and is clamped with the clamping groove, the pressure limiting valve piece is positioned in the clamping groove and is extruded on the housing by the supporting sleeve, the upper end of the pressure limiting spring is connected to the upper end of the supporting sleeve, and the lower end of the pressure limiting spring is connected to the pressing block.

4. The pump vibration reduction structure according to claim 3, wherein the upper end of the supporting sleeve is fixedly connected with a cylinder body, the cylinder body piston is connected in a sliding manner in the cylinder body, a piston rod is inserted into the upper end of the supporting sleeve, the lower end of the piston rod is fixedly connected to the pressing block, the upper end of the piston rod is fixedly connected to the cylinder body piston, a one-way valve oriented to the upper side of the cylinder body piston is arranged on the cylinder body piston, an air tap is arranged at the upper end of the cylinder body, and a pressure limiting valve is sleeved at the upper end of the air tap.

5. The pump vibration reduction structure according to claim 4, wherein the air tap is threadably connected to the cylinder.