CN205331073U

CN205331073U - Piston accumulator

Info

Publication number: CN205331073U
Application number: CN201521139537.2U
Authority: CN
Inventors: 郭浩标
Original assignee: Zhongshan Degong Machine Technology Co Ltd
Current assignee: Zhongshan Degong Machine Technology Co Ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-06-22
Anticipated expiration: 2025-12-30

Abstract

The utility model discloses a piston accumulator, including a fore -and -aft cylinder body and the piston of setting in the cylinder body inner chamber that slide, this piston is separated a spell body cavity that becomes to be located the piston top with the inner chamber of cylinder body and is located a hydraulic oil cavity of piston below, its characterized in that: the top of piston is provided with a lubricated oil reservoir, and the inside wall of cylinder body is hugged closely to the lateral wall of this lubrication oil reservoir. Because the utility model discloses in also set up lubricated oil reservoir at the top of piston, like this, shift up the measured time mutually when the piston, this lubrication oil reservoir can form the oil film between the inner wall of piston and cylinder body, can play lubricated effect, avoids the dry friction, prevents the noise, can reduce the wearing and tearing of cylinder body and piston in addition, lengthens the life of this accumulator.

Description

A kind of piston accumulator

Technical field

This utility model relates to hydraulic system field, particularly to a kind of piston accumulator。

Background technology

Piston accumulator is widely used in die casting machine, in the hydraulic system of injection machine etc., generally include a cylinder body and the piston being arranged in cylinder body, the inner chamber of cylinder body is divided into two parts by this piston, the gases such as nitrogen are passed in cavity above piston, the compression utilizing gas carries out energy storage, cavity below piston then connects with other hydraulic means in hydraulic system and fills hydraulic oil, sealing ring it is provided with to intercept the connection of cavity above and below piston between sidewall and the inwall of cylinder body of piston, piston accumulator is in use, piston slides up and down in cylinder body with energy storage and releases energy, when piston moves down, owing to being filled with hydraulic oil in the cavity below piston, these hydraulic oil can form oil film between the inwall of cylinder body and the outer wall of piston, lubrication can be played, but owing to piston accumulator is higher to the seal request between piston and cylinder body, the outer wall of piston is comparatively tight with the laminating of the inwall of cylinder body, after piston moves down, will not debris force feed on inboard wall of cylinder block above piston, so, when piston moves up, the outer wall of piston and the inwall of cylinder body are easy to dry friction occur, abnormal sound and noise can be sent, will also result in quickening cylinder body, the rate of wear of piston and sealing ring, reduce its service life。

Utility model content

In order to solve the problems referred to above, the purpose of this utility model is in that to provide one to abate the noise, the piston accumulator of long service life。

This utility model the technical scheme is that for solving its technical problem

A kind of piston accumulator, cylinder body and the piston being slidably arranged in inner chamber of cylinder block including a longitudinal direction, the inner chamber of cylinder body is separated into the air chamber being positioned at above piston and is positioned at the hydraulic fluid chamber below piston by this piston, it is characterized in that: the top of described piston is provided with a lube layer, the sidewall of this lube layer is close to the medial wall of cylinder body。

Preferably, the top of described piston is provided with an oil suction part, and this oil suction part is adsorbed with lubricating oil and forms described lube layer。

Preferably, described oil suction part is a sponge plate or cotton plate。

Preferably, described cylinder body includes the cylinder sleeve of a tubular, a upper cover and a lower cover, described upper cover and lower cover are separately fixed at the top of cylinder sleeve and bottom and are encapsulated in cylinder sleeve by described piston, cover the steam vent offered for described air chamber being in communication with the outside on described, this steam vent is provided with flow control valve；The liquid outlet offered for being in communication with the outside by described hydraulic fluid chamber is covered under described。

The beneficial effects of the utility model are: owing in this utility model, top at piston is also provided with lube layer, so, when piston above moves mutually, this lube layer can form oil film between piston and the inwall of cylinder body, the effect of lubrication can be played, it is to avoid dry friction, it is prevented that noise occurs, and the abrasion of cylinder body and piston can be reduced, extend the service life of this accumulator。

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail。

Fig. 1 is sectional view of the present utility model；

Fig. 2 is the partial enlarged drawing of part A in Fig. 1。

Detailed description of the invention

See figures.1.and.2, a kind of piston accumulator, cylinder body and the piston 20 being slidably arranged in inner chamber of cylinder block including a longitudinal direction, the inner chamber of cylinder body is separated into the air chamber 14 being positioned at above piston 20 and is positioned at the hydraulic fluid chamber 15 below piston 20 by this piston 20, it is characterized in that: the top of piston 20 is provided with a lube layer 30, the sidewall of this lube layer 30 is close to the medial wall of cylinder body。Owing to this utility model being also provided with lube layer 30 at the top of piston 20, so, when piston 20 phase moves, this lube layer 30 can form oil film between piston 20 and the inwall of cylinder body, the effect of lubrication can be played, it is to avoid dry friction, it is prevented that noise occurs, and cylinder body and the abrasion of piston 20 can be reduced, extend the service life of this accumulator。

In actual applications, directly can inject a certain amount of lubricating oil in air chamber 14, these lubricating oil are pooled to the top of piston 20 can form above-mentioned lube layer 30, and in use it is to maintain vertical due to accumulator, these lubricating oil can collect in the top of piston 20 always, shape will not change, it is possible to lasting plays lubrication。One oil suction part can also be set at the top of piston 20 equally, this oil suction part is adsorbed with lubricating oil and forms lube layer 30, this oil suction part can be sponge plate, cotton plate or other suitable structures, the sidewall of oil suction part can be close to the inwall of the body of rod with the movement along with piston 20 on inboard wall of cylinder block coating lubricating oil, also can be at a distance with the inwall of cylinder body, when utilizing piston 20 to rise the increase of the pressure in air chamber 14 by hydraulic oil from oil suction part squeezing out and flowing between the inwall of cylinder body and the sidewall of piston 20。It is provided with sealing ring 21 between lateral wall and the medial wall of cylinder body of piston 20, is used for separating air chamber 14 and hydraulic fluid chamber 15。

Cylinder body includes cylinder sleeve 11, upper cover 12 and a lower cover 13 of a tubular, upper cover 12 and lower cover 13 are separately fixed at the top of cylinder sleeve 11 and bottom and are encapsulated in cylinder sleeve 11 by piston 20, it is easy to dismounting, upper cover 12 offers the steam vent 121 for air chamber 14 being in communication with the outside, this steam vent 121 is provided with flow control valve (not shown)；Lower cover 13 offers the liquid outlet 131 for being in communication with the outside by hydraulic fluid chamber 15, liquid outlet 131 generally connects with extraneous hydraulic means, utilize the flow control valve on steam vent 121 can control pressure and the volume size of gas in air chamber 14 flexibly, and then energy storage capacity, convenient use can be controlled flexibly。

The foregoing is only preferred embodiments of the present utility model, broadly falling within protection domain of the present utility model as long as realizing the technical scheme of this utility model purpose with essentially identical means。

Claims

1. a piston accumulator, cylinder body and the piston (20) being slidably arranged in inner chamber of cylinder block including a longitudinal direction, the inner chamber of cylinder body is separated into the air chamber (14) being positioned at piston (20) top and the hydraulic fluid chamber (15) being positioned at piston (20) lower section by this piston (20), it is characterized in that: the top of described piston (20) is provided with a lube layer (30), the sidewall of this lube layer (30) is close to the medial wall of cylinder body。

2. a kind of piston accumulator according to claim 1, it is characterised in that: the top of described piston (20) is provided with an oil suction part, and this oil suction part is adsorbed with lubricating oil and forms described lube layer (30)。

3. a kind of piston accumulator according to claim 2, it is characterised in that: described oil suction part is a sponge plate or cotton plate。

4. a kind of piston accumulator according to claim 1, it is characterized in that: described cylinder body includes the cylinder sleeve (11) of a tubular, a upper cover (12) and a lower cover (13), described upper cover (12) and lower cover (13) are separately fixed at the top of cylinder sleeve (11) and bottom and are encapsulated in cylinder sleeve (11) by described piston (20), offering the steam vent (121) for described air chamber (14) being in communication with the outside on described upper cover (12), this steam vent is provided with flow control valve on (121)；Described lower cover (13) offers the liquid outlet (131) for being in communication with the outside by described hydraulic fluid chamber (15)。