CN111536089A

CN111536089A - Durable pressure cylinder structure based on skeleton texture

Info

Publication number: CN111536089A
Application number: CN202010500429.2A
Authority: CN
Inventors: 杨培富
Original assignee: Solh Technology Zhejiang Co ltd
Current assignee: Solh Technology Zhejiang Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2020-08-14

Abstract

The invention discloses a durable pressure cylinder structure based on a skeleton structure, which comprises a central unit consisting of a central body, a regulating valve, a reversing valve, a left side plate, a right side plate and a reset valve, wherein cylinder bodies are arranged at two sides of the central body; the piston is locked and sleeved on the piston rod through the locking nut, the piston is in floating connection with the piston rod, a gap is reserved between the abutting surface of the locking nut and the piston, the piston is provided with a sealing annular groove and an oil storage groove, an air sealing ring is sleeved in the sealing annular groove, and lubricating oil is stored in the oil storage groove; the end plate is installed on the cylinder body cover, the cylinder body is fixed on the central body in a clamping mode through the connecting rod and the connecting rod nut, coaxial holes are formed in the end plate, the cylinder body and the central body, and cylinder body sealing rings are installed between the cylinder body and the end plate and between the cylinder body and the central body in a pressure-sharing mode. The invention has good sealing and lubricating properties and can prevent the piston from being stuck.

Description

Durable pressure cylinder structure based on skeleton texture

Technical Field

The invention relates to the technical field of superchargers, in particular to a durable supercharging cylinder structure based on a framework structure.

Background

A supercharger is known, which mainly comprises a central unit, a cylinder fixedly mounted on two corresponding surfaces of the central unit, a piston rod and an end plate. The central unit includes a central body and a pressure regulating valve mounted on the central body for regulating the pressure of incoming pressure fluid, and a reversing valve and a reset valve mounted in the central housing. In the prior art, the cylinder pulling phenomenon often occurs in the use process of the supercharger, and air leakage is easily generated between the end plate and the cylinder body, so that the problems of large maintenance amount and short service life of the supercharger are caused.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a durable pressure cylinder structure based on a skeleton structure, and the pressure cylinder structure not only has good sealing performance, but also can avoid the piston from being blocked, and prolong the whole service life of equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a durable pressure cylinder structure based on a skeleton structure comprises a central unit consisting of a central body, a regulating valve, a reversing valve, a left side plate, a right side plate and a reset valve, wherein cylinder bodies are symmetrically arranged on two side surfaces of the central body, a piston rod is horizontally and slidably arranged in the central body in a penetrating manner, two ends of the piston rod are respectively connected with pistons in the cylinder bodies on the corresponding sides, and the pistons divide an inner cavity of the cylinder bodies into a pressurizing chamber on the inner side and a driving chamber on the outer side; the piston is sleeved at the end of the piston rod through a locking nut anti-falling lock, the piston and the piston rod are in floating connection which enables the piston to have a self-correcting function, a gap which enables the piston to float is reserved between the top connection surface of the locking nut and the piston, two sealing annular grooves and an oil storage groove are processed on the outer peripheral surface of the piston, an air sealing ring used for enhancing the air tightness between the piston and the inner wall of the cylinder body is sleeved in the sealing annular groove, and lubricating oil used for improving the lubricating property between the piston and the inner wall of the cylinder body is stored in the oil storage groove; the outer port of the cylinder body is sealed and provided with an end plate, the cylinder body is tightly fixed on the central body in a screw fit mode through a connecting rod and a connecting rod nut, coaxial holes for the connecting rod to penetrate are formed in the end plate, the cylinder body and the central body, and cylinder body sealing rings are arranged between the cylinder body and the end plate and between the cylinder body and the central body in a pressure-sharing mode.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the central body is formed with an inlet channel and an outlet channel which are communicated with the pressurizing chamber, a first check valve used for preventing high-pressure fluid in the pressurizing chamber from flowing back to the inlet channel is installed in the inlet channel, a second check valve used for preventing high-pressure fluid entering the outlet channel from flowing back to the pressurizing chamber is installed in the outlet channel, a sealing head in the first check valve and a sealing head in the second check valve are identical in structure, and the sealing head is composed of a metal framework and a rubber body coated on the metal framework.

The reversing valve consists of a valve sleeve, a valve core, a left side valve body, a right side valve body, a left push rod, a right push rod and a push rod spring; the valve sleeve is fixedly arranged in the center of the reversing valve assembly cavity, and an inlet port and a left outlet port and a right outlet port are processed on the valve sleeve; the left side valve body and the right side valve body are correspondingly installed in the left end port and the right end port of the reversing valve assembly cavity, the valve core is installed in the valve sleeve in a sliding mode, the push rod springs are arranged in the valve core and elastically press-installed between the two push rods, the rod body parts of the push rods penetrate through guide sliding holes formed in the machining of the side valve bodies in a guiding sliding mode, and the two ends of the valve sleeve are additionally provided with buffering rubber pads used for buffering the sliding of the valve core to reduce noise of the reversing valve.

Two second channels correspondingly communicated with the two outlet ports of the valve sleeve are formed in the central body, and a fluid channel for connecting the second channels and a first channel for communicating the driving chamber and the fluid channel are formed on the cylinder body.

A supply passage formed in the central body and connected to the pressure regulating valve, the supply passage being in communication with the inlet port of the valve housing, the pressure regulating valve being provided with a pressure regulating knob for facilitating manual, helical pressure regulation; the piston rod is made of stainless steel materials.

The reset valve comprises a valve casing fixed on the central body, a reset rod slidably mounted in the valve casing and a reset spring pressed in the valve casing through the reset rod, wherein a reset button is mounted on the valve casing, and the reset button is abutted with the reset rod.

Compared with the prior art, the connection of the piston rod and the piston adopts a floating design structure, so that the piston has an automatic correction function, and the phenomenon of clamping of the piston in the sliding process of the piston in the cylinder body can be avoided. The oil storage groove is further processed on the outer peripheral surface of the piston, lubricating oil can be stored in the oil storage groove, the lubricating oil can play a role in lubricating the sliding of the piston, and the problem that the cylinder body is pulled due to overheating is solved. The cylinder body sealing rings are mounted between the assembly of the cylinder body and the end plate and between the assembly of the cylinder body and the central body in a pressure equalizing manner. The cylinder body sealing ring can ensure the air tightness of the cylinder body and ensure that the cylinder body cannot leak air.

The invention has simple structure, good sealing and lubricating performance and long service life of products, and can effectively prevent the occurrence of the phenomenon of piston jamming.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a schematic cross-sectional view of III-III of FIG. 2;

FIG. 4 is a cross-sectional structural view of the center unit in FIG. 3;

FIG. 5 is a schematic cross-sectional view of IV-IV in FIG. 2;

FIG. 6 is an enlarged schematic view of the diverter valve of FIG. 3;

FIG. 7 is a cross-sectional structural view of a sealing head of the check valve of the present invention;

fig. 8 is a schematic view of an assembly structure of the piston and the piston rod of the present invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 8 are schematic structural views of the present invention.

Wherein the reference numerals are: a cushion D, a first check valve F1, a second check valve F2, a metal skeleton G1, a rubber body G2, a gas seal ring H, a cylinder seal ring M, a discharge passage P, a gap S, a center unit 1, a center body 11, an introduction passage 11a, an extraction passage 11b, a second passage 11c, a supply passage 11D, a control valve 12, a pressure regulating knob 121, a selector valve 13, a valve housing 131, an inlet port 131a, an outlet port 131b, a valve spool 132, a side valve body 133, a push rod 134, a push rod spring 135, a side plate 14, a return valve 15, a valve housing 151, a return rod 152, a return spring 153, a return button 154, a cylinder 2, a pressurizing chamber 2a, a driving chamber 2b, a fluid passage 2c, a first passage 2D, an end plate 21, a piston rod 3, a piston 4, a sealing annular groove 41, an oil storage groove 42, a lock nut 5, a connecting rod 61.

As shown in the figure, the invention discloses a durable pressure cylinder structure based on a skeleton structure, which has better sealing property and durability and can prolong the service life of a pressure booster in the prior art. It mainly comprises a central unit 1, a cylinder 2, an end plate 21, a piston rod 3, a piston 4, a lock nut 5, a connecting rod 61 and a connecting rod nut 62. The central unit 1 is located in the middle and mainly composed of a central body 11, a regulating valve 12, a reversing valve 13, a left side plate 14, a right side plate 14 and a reset valve 15. The central body 11 is a casing formed by casting, the regulating valve 12 is spirally installed in a regulating valve hole formed in the central body 11, the regulating valve 12 is connected with a pressure fluid inlet, and the regulating valve 12 is used for regulating the pressure of the entering pressure fluid. The reversing valve 13 is arranged in a reversing valve assembly cavity formed in the central body 11, the reset valve 15 is arranged below the front part of the central body 11, the left side plate 14 and the right side plate 14 are correspondingly arranged on the left side and the right side of the central body 11, and the diameter of each side plate 14 is smaller than the inner diameter of the cylinder body 2. The cylinder bodies 2 are correspondingly arranged on the left side and the right side of the central body 11 one by one, the piston rods 3 can horizontally slide and penetrate through the central body 11, and sliding sleeves which enable the piston rods 3 to penetrate through and support the sliding of the piston rods 3 are arranged on the side plates 14. Pistons 4 are mounted in the left and right cylinders 2, and the pistons 4 divide the inner cavity of the cylinders 2 into an inner pressurizing chamber 2a and an outer driving chamber 2 b. Two ends of the piston rod 3 extend into the cylinder body 2 on the corresponding side and are connected with the piston 4 in the cylinder body 2 on the corresponding side, and two ends of the piston rod 3 are provided with threads and piston positioning sections for positioning and installing the piston 4. Piston 4 location suit is on the piston location section of piston rod 3 to screw thread through lock nut 5 and on the piston rod 3 cooperates, overlaps piston 4 anticreep lock on piston rod 3.

The biggest contribution of the invention is that the piston 4 and the piston rod 3 are in floating connection, and a clearance S which can enable the piston 4 to float is reserved between the top contact surface of the locking nut 5 and the piston 4. Therefore, the piston 4 has a self-correcting function, and the phenomenon that the piston is blocked when the piston 4 slides in the cylinder body 2 can be avoided. In order to better guarantee the service life of the supercharger and prevent the piston from pulling, the invention also processes two sealing annular grooves 41 and an oil storage groove 42 on the peripheral surface of the piston 4. The sealing ring groove 41 is internally sleeved with an air sealing ring H for enhancing the air tightness between the piston 4 and the inner wall of the cylinder body 2, and the air sealing ring H can ensure that the pressurizing chamber 2a and the driving chamber 2b are mutually independent sealing spaces. The invention is designed with the oil storage tank 42, the oil storage tank 42 stores lubricating oil, and the lubricating property between the piston 4 and the inner wall of the cylinder body 2 can be improved through the lubricating of the lubricating oil, so that the cylinder can be prevented from being locked and pulled by the piston, and the service life of the cylinder body 2 is prolonged.

The end plates 21 are two, the outer ports of the left and right cylinder bodies 2 are respectively provided with one end plate 21 in a sealing way, the connecting rod 61 and the connecting rod nut 62 are used for fixedly connecting the end plates 21, the cylinder bodies 2 and the central unit 1 into a whole, and the cylinder bodies 2 are clamped and fixed on the central body 11 in a spiral matching way of the connecting rod 61 and the connecting rod nut 62. Coaxial holes for the connecting rod 61 to penetrate are formed in the end plate 21, the cylinder body 2 and the central body 11, and the connecting rod 61 is screwed and clamped by a connecting rod nut 62 after sequentially passing through the coaxial hole of the left end plate 21, the coaxial hole of the left cylinder body 2, the coaxial hole of the central body 11, the coaxial hole of the right cylinder body 2 and the coaxial hole of the right end plate 21. In order to ensure the sealing of the cylinder body 2, cylinder body sealing rings M are arranged between the assembling room of the cylinder body 2 and the end plate 21 and between the assembling room of the cylinder body 2 and the central body 11 in a pressure equalizing way. The piston rod 3 is made of stainless steel materials. The piston rod 3 made of stainless steel material can improve the corrosion resistance and strength of the surface of the piston rod 3.

In the embodiment, the central body 11 is formed with an inlet passage 11a and an outlet passage 11b communicating with the pressurizing chamber 2a, the inlet passage 11a is communicated with the inlet of the pressure fluid, and the outlet passage 11b is used for guiding the pressurized high-pressure fluid to the high-pressure fluid outlet formed in the central body 11, so as to realize the output of the high-pressure fluid. As can be seen from fig. 5, a first check valve F1 is installed in the inlet passage 11a, the first check valve F1 enables an externally supplied pressure fluid with a certain pressure to enter the pressurizing chamber 2a through the inlet passage 11a and the first check valve F1, the pressure fluid can form a high-pressure fluid under compression of the piston 4 in the pressurizing chamber 2a, and the first check valve F1 mainly prevents the pressure fluid of the high-pressure fluid in the pressurizing chamber 2a from flowing back into the inlet passage 11 a. The outlet passage 11b is installed with a second check valve F2, and the second check valve F2 functions to prevent the high-pressure fluid introduced into the outlet passage 11b from flowing back into the pressurizing chamber 2a when the pressurizing chamber 2a is charged. The first check valve F1 and the second check valve F2 each include a sealing head that acts as a one-way seal. The sealing head of the first check valve F1 and the sealing head of the second check valve F2 have the same structure and are both composed of a metal framework G1 and a rubber body G2 coated on the metal framework G1. The sealing head adopts a design structure of metal and rubber, so that the sealing effect of the sealing head can be better improved.

As shown in fig. 4 and 6, the direction valve 13 of the present invention is composed of a valve housing 131, a valve core 132, left and right side valve bodies 133, left and right push rods 134, and a push rod spring 135. A valve sleeve 131 is fixedly installed at the center of a direction valve assembly chamber formed in the central body 11, and the valve sleeve 131 is formed with an inlet port 131a for allowing a pressure fluid to enter and two outlet ports 131b for allowing the pressure fluid to exit; the left side valve body 133 and the right side valve body 133 are correspondingly arranged in the left end port and the right end port of the reversing valve assembly cavity, the valve core 132 is arranged in the valve sleeve 131 in a sliding mode, the push rod spring 135 is arranged in the valve core 132 and elastically pressed between the two push rods 134, the rod body part of each push rod 134 penetrates through a guide sliding hole formed in the machining of the corresponding side valve body 133 in a guiding and sliding mode, and the two ends of the valve sleeve 131 are additionally provided with buffering rubber pads D which are used for buffering the sliding of the valve core 132. The buffer rubber cushion D can effectively reduce the noise generated by reversing of the reversing valve. The minimum diameter part is formed in the inner cavity of the valve core 132, the annular table with the diameter larger than that of the minimum diameter part of the valve core 132 is formed at the front end of the push rod 134, and the push rods 134 on the left side and the right side can push the valve core 132 to move left and right through the annular table, so that the reversing purpose is realized. The inside of the side valve body 133 constitutes a discharge passage P.

In the embodiment shown in fig. 3, two second passages 11c are formed in the central body 11 to communicate with the two outlet ports 131b of the valve housing 131, and a fluid passage 2c for connecting the second passages 11c and a first passage 2d for communicating the driving chamber 2b with the fluid passage 2c are formed in the cylinder body 2.

A supply channel 11d formed in the central body 11 and connected to the pressure regulating valve 12, the supply channel 11d communicating with the inlet port 131a of the valve housing 131, the pressure regulating valve 12 being provided with a pressure regulating knob 121 facilitating manual screw pressure regulation;

the reset valve 15 includes a valve housing 151 fixed to the central body 11, a reset rod 152 slidably installed in the valve housing 151, and a reset spring 153 press-fitted in the valve housing 151 through the reset rod 152, and a reset button 154 is installed on the valve housing 151, and the reset button 154 abuts against the reset rod 152.

The working principle of the invention is as follows: when the pressure fluid introduced from the air inlet enters the supply channel 11 d; assuming that the spool 132 of the direction valve 13 is at the rightmost end, when the inlet port 131a communicates with the right outlet port 131b, the pressure fluid enters the driving chamber 2b of the right cylinder 2 through the right second passage 11c, the right cylinder 2 fluid passage 2c, and the first passage 2d in this order, thereby pushing the piston 4 to move leftward. As the piston 4 moves leftward, the gas in the pressurizing chamber 2a of the right cylinder 2 is continuously compressed to be pressurized, and the high-pressure fluid thus pressurized is guided through the right second check valve F2 and to the high-pressure fluid outlet of the center body 11 through the lead-out passage 11b, whereby the high-pressure fluid is output. While the left outlet port 131b is not communicated with the inlet port 131a, the left outlet port 131b is communicated with the left discharge passage P. That is, the fluid passage 2c of the other side cylinder 2 is connected to the discharge passage P through the second passage 11 c. When the piston 4 moves to a certain position to push the right push rod 134 to move leftwards, and when the piston 4 pushes the extreme position, the right push rod 134 pushes the valve core 132 of the reversing valve to be at the leftmost end, so that the reversing valve is reversed. At this time, the inlet port 131a communicates with the left outlet port 131b, and the pressure fluid enters the driving chamber 2b of the left cylinder 2 through the left second passage 11c and the fluid passage 2c and the first passage 2d of the left cylinder 2, thereby pushing the piston 4 to the right. As the piston 4 moves rightward, the gas in the pressurizing chamber 2a of the left cylinder 2 is continuously compressed to be pressurized, and the high-pressure fluid thus pressurized is guided through the left second check valve F2 and is guided to the high-pressure fluid outlet of the center body 11 through the outlet passage 11b, whereby the output of the high-pressure fluid is realized. Meanwhile, since the right outlet port 131b is not communicated with the inlet port 131a, the right outlet port 131b is communicated with the right discharge passage P. That is, the fluid passage 2c of the other side cylinder 2 is connected to the discharge passage P through the second passage 11 c. In this reciprocating cycle, the piston 4 controlling the supercharger reciprocates at an extremely high speed, and as the output pressure increases, the reciprocating speed of the piston 4 decreases until it stops. At the moment, the output pressure of the supercharger is constant, the energy consumption is lowest, and all parts stop working; and no matter what causes to keep the pressure loop pressure to drop, the booster will all start automatically, replenish the leakage pressure, keep the loop pressure constant.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by one skilled in the art without departing from the scope of the invention.

Claims

1. A durable pressure cylinder structure based on a skeleton structure comprises a central unit (1) consisting of a central body (11), a regulating valve (12), a reversing valve (13), a left side plate, a right side plate (14) and a reset valve (15), wherein cylinder bodies (2) are symmetrically arranged on two side surfaces of the central body (11), a piston rod (3) is horizontally and slidably arranged in the central body (11), two ends of the piston rod (3) are respectively connected with pistons (4) in the cylinder bodies (2) on the corresponding sides, and the pistons (4) divide an inner cavity of the cylinder bodies (2) into a pressurizing chamber (2a) on the inner side and a driving chamber (2b) on the outer side; piston (4) through lock nut (5) anticreep lock cover in the end of piston rod (3), characterized by: the piston (4) and the piston rod (3) are in floating connection which can enable the piston (4) to have a self-correcting function, a gap (S) which can enable the piston (4) to float is reserved between the top contact surface of the lock nut (5) and the piston (4), two sealing annular grooves (41) and an oil storage groove (42) are processed on the outer peripheral surface of the piston (4), an air sealing ring (H) which is used for enhancing the air sealing performance between the piston (4) and the inner wall of the cylinder body (2) is sleeved in each sealing annular groove (41), and lubricating oil which is used for improving the lubricating performance between the piston (4) and the inner wall of the cylinder body (2) is stored in each oil storage groove (42); the outer port sealing cover of the cylinder body (2) is provided with an end plate (21), the cylinder body (2) is clamped and fixed on the central body (11) in a spiral matching mode of a connecting rod (61) and a connecting rod nut (62), coaxial holes for the connecting rod (61) to penetrate are formed in the end plate (21), the cylinder body (2) and the central body (11), and cylinder body sealing rings (M) are mounted between the cylinder body (2) and the end plate (21) and between the cylinder body (2) and the central body (11) in a pressure-sharing mode.

2. The durable pressure cylinder structure based on a skeleton structure of claim 1, wherein: the central body (11) is formed with an inlet passage (11a) and an outlet passage (11b) which are communicated with a pressurizing chamber (2a), a first check valve (F1) which is used for preventing high-pressure fluid in the pressurizing chamber (2a) from flowing back to the inlet passage (11a) is arranged in the inlet passage (11a), a second check valve (F2) which is used for preventing high-pressure fluid entering the outlet passage (11b) from flowing back to the pressurizing chamber (2a) is arranged in the outlet passage (11b), the sealing head in the first check valve (F1) and the sealing head in the second check valve (F2) have the same structure, and the sealing head consists of a metal framework (G1) and a rubber body (G2) coated on the metal framework (G1).

3. The durable pressure cylinder structure based on a skeleton structure of claim 2, wherein: the reversing valve (13) consists of a valve sleeve (131), a valve core (132), a left side valve body, a right side valve body (133), a left push rod, a right push rod (134) and a push rod spring (135); the valve sleeve (131) is fixedly arranged in the center of the reversing valve assembling cavity, and an inlet port (131a) and a left outlet port and a right outlet port (131b) are machined on the valve sleeve (131); the left side valve body and the right side valve body (133) are correspondingly arranged in the left end port and the right end port of the reversing valve assembly cavity, the valve core (132) is arranged in the valve sleeve (131) in a sliding mode, the push rod spring (135) is arranged in the valve core (132) and elastically pressed between the two push rods (134), the rod body part of each push rod (134) penetrates through a guide sliding hole formed in the machining of the corresponding side valve body (133) in a guide sliding mode, and buffering rubber gaskets (D) used for buffering the sliding of the valve core (132) to reduce noise of the reversing valve are additionally arranged at the two ends of the valve sleeve (131).

4. A durable pressure cylinder construction based on a skeleton construction according to claim 3, characterized in that: two second channels (11c) which are correspondingly communicated with two outlet ports (131b) of the valve sleeve (131) are formed in the central body (11), and a fluid channel (2c) used for connecting the second channels (11c) and a first channel (2d) used for communicating the driving chamber (2b) with the fluid channel (2c) are formed on the cylinder body (2).

5. The durable pressure cylinder structure based on a skeleton structure of claim 4, wherein: a supply channel (11d) of the pressure regulating valve (12) is formed and connected in the central body (11), the supply channel (11d) is communicated with an inlet port (131a) of the valve sleeve (131), and the pressure regulating valve (12) is provided with a pressure regulating knob (121) which facilitates manual spiral pressure regulation; the piston rod is made of stainless steel materials.

6. The durable pressure cylinder structure based on a skeleton structure of claim 5, wherein: the reset valve (15) comprises a valve casing (151) fixed on the central body (11), a reset rod (152) slidably installed in the valve casing (151) and a reset spring (153) pressed in the valve casing (151) through the reset rod (152), wherein a reset button (154) is installed on the valve casing (151), and the reset button (154) is abutted against the reset rod (152).