CN215110647U

CN215110647U - Driving double-buffering executing device of stepless air quantity regulating air valve of compressor

Info

Publication number: CN215110647U
Application number: CN202120928828.9U
Authority: CN
Inventors: 苗静; 王波
Original assignee: Guizhou Mangwei Fluid Intelligent Technology Co ltd
Current assignee: Guizhou Mangwei Fluid Intelligent Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-10
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a two buffering final controlling element of drive of stepless tolerance governing pneumatic valve of compressor. The utility model comprises an actuator body, wherein the upper part of the actuator body is connected with an oil inlet joint, the middle part is connected with a two-position three-way high-speed electromagnetic valve, the lower part is connected with a plunger assembly, and the left part is connected with an oil return port joint; and an air valve opening buffer assembly is arranged in the oil inlet joint. The utility model provides a buffer that the process is completely independent earlier fast later than slow is opened and closed to a set of valve, makes opening and the closing process of valve independently controllable, and plunger rapid motion section and buffer section can press the good matching of motion process of valve with the compressor to improve compressor air supply and output pressure's control accuracy.

Description

Driving double-buffering executing device of stepless air quantity regulating air valve of compressor

Technical Field

The utility model relates to a compressor technical field, especially a two buffering final controlling element of drive of stepless tolerance governing pneumatic valve of compressor.

Background

In order to save energy, more and more large-scale piston type reciprocating compressors adopt an electric control gas distribution system, and an electronic controller controls the opening and closing time of an air inlet valve according to the required air supply quantity of the downstream, so that the compressor is changed from the original constant-displacement air supply mode to the variable-displacement air supply mode, and the stepless regulation of the air supply quantity is realized.

The on-off control of the air inlet valve of the compressor is realized by controlling an actuating mechanism of a hydraulic piston by a two-position three-way valve and pushing an air valve plate to reciprocate by an unloader. Due to the high-speed response of the hydraulic system, if no buffering measure is taken, the valve plate can quickly impact the valve seat under the action of hydraulic pressure or air pressure in the opening and closing processes of the air inlet valve, and the valve plate can be quickly damaged by huge impact force, so that the service life of the air inlet valve is influenced.

In order to solve the above problems, the prior art adopts a buffer technology of first-speed and second-speed in the closing process of the valve, but a fixed throttle nozzle is used for limiting the speed of the whole opening process of the valve in the opening process of the valve, so that although the buffer function is achieved, the control precision of the air supply quantity and the air supply pressure of the compressor can be influenced because the opening process of the valve is slow.

Although the double buffering technology is adopted in the chinese patent CN110778490A, the technology still has problems. In the technology, after the air valve is closed and seated, in order to ensure the complete attachment of the valve plate and the valve seat of the air valve, the unloading device and the plunger in the actuating mechanism must move upwards for a stroke to completely separate the unloading device from the valve plate, so that a certain gap exists between the valve plate and the unloading device when the air valve is in a closed position. Therefore, in the technology, in the process that the piston of the actuating mechanism pushes the unloader to open the air valve, the air valve can be pushed to open after the idle stroke between the unloader and the valve plate (the gap between the valve plate and the unloader) is finished. In this technique, the two damping forces of the opening and closing of the valve are coupled, i.e. the rapid portions of the piston movement are equal. In the design process, the buffering requirement of the air valve closing process is preferably considered under the general condition, so that a section of quick section is used when the air valve is just in contact with a valve plate in the opening process due to the existence of a gap between the valve plate of the air valve and an unloader in the opening process of the air valve, the quick section has short stroke in the opening process of the valve plate, most of the stroke is in the buffering section, namely, most of the opening speed of the valve plate is in the buffering state, and the system control precision of the air supply quantity and the air supply pressure of the compressor can be influenced.

Disclosure of Invention

An object of the utility model is to provide a two buffering final controlling element of drive of compressor stepless tolerance governing pneumatic valve. The utility model provides a buffer that the process is completely independent earlier fast later than slow is opened and closed to a set of valve, makes opening and the closing process of valve independently controllable, and plunger rapid motion section and buffer section can press the good matching of motion process of valve with the compressor to improve compressor air supply and output pressure's control accuracy.

The technical scheme of the utility model: a dual-drive buffer execution device of a stepless air volume adjusting air valve of a compressor comprises an execution mechanism main body, wherein the upper part of the execution mechanism main body is connected with an oil inlet joint, the middle part of the execution mechanism main body is connected with a two-position three-way high-speed electromagnetic valve, the lower part of the execution mechanism main body is connected with a plug component, and the left part of the execution mechanism main body is connected with an oil return port joint; an air valve opening buffer assembly is arranged in the oil inlet joint; and an air valve closing buffer assembly is arranged in the two-position three-way high-speed electromagnetic valve.

In the driving double-buffering execution device of the stepless air flow adjusting air valve of the compressor, the air valve opening buffering assembly comprises a baffle plate arranged at the lower part of the oil inlet joint and a guide bushing arranged in the middle, an air valve opening buffering piston is arranged in the guide bushing, a first throttling hole is arranged on the air valve opening buffering piston, and an air valve opening buffering piston return spring is arranged between the air valve opening buffering piston and the baffle plate; and a plug is arranged on the upper part of the guide bushing, and a filter screen is arranged between the plug and the guide bushing.

In the driving double-buffering execution device of the stepless air flow adjusting valve of the compressor, an oil inlet locking plate is sleeved on the oil inlet joint; an oil outlet locking plate is sleeved on the oil return port connector; the oil inlet locking plate and the oil outlet locking plate are respectively connected with the actuating mechanism body through fastening screws.

In the driving double-buffering execution device for the stepless air flow regulating valve of the compressor, the two-position three-way high-speed electromagnetic valve comprises a valve body, the left part of the valve body is connected with an oil return port joint, the middle part of the valve body is provided with a valve core, the middle upper part of the valve body is provided with a one-way valve, and the right part of the valve body is connected with an electromagnet assembly; a spring is arranged at the right part of the valve core; and an air valve closing buffer assembly is arranged between the left part of the valve core and the oil return port connector.

In the driving double-buffering execution device of the stepless air flow adjusting air valve of the compressor, the air valve closing buffering assembly comprises an air valve closing buffering piston sleeved on the left part of the valve core, an air valve closing buffering piston return spring is sleeved on the air valve closing buffering piston, and an oil return valve seat is arranged on the left side of the air valve closing buffering piston return spring.

In the driving double-buffering execution device of the stepless air flow adjusting air valve of the compressor, two throttle holes II which are symmetrically arranged are arranged on the air valve closing buffering piston.

In the driving double-buffering execution device for the stepless air flow regulating valve of the compressor, both the valve seat inner hole of the oil return valve seat and the left end of the valve core are arranged in conical surfaces; the diameter of the inner hole of the valve seat is equal to that of the valve core guide hole where the valve core is located.

In the driving double-buffering execution device of the stepless air volume regulating air valve of the compressor, the valve seat of the oil return valve and the left end position of the valve core form an oil return valve port; the middle part of the valve core and the valve body form an oil inlet valve port; the middle-lower part of the valve body and the upper end of the plunger assembly form a control port.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses an opening process and the closing process of compressor admission valve all can be controlled to all can realize the process independent control that the speed was fast earlier afterwards slow, can make the quick section of plunger motion and the fine matching of buffering section and air valve mechanism like this, the impact problem when having solved the valve body and taking a seat has improved the accurate control of compressor tolerance moreover.

2. The utility model discloses current mechanism at present, the pneumatic valve is closed and is cushioned the piston internal diameter and increase to some extent, and the cushion piston sectional area reduces, and in order to guarantee that the stroke of the quick section of plunger is unchangeable, must increase the stroke of cushion piston, can improve the control accuracy from the quick section to the turning point of cushion section like this.

3. The utility model discloses the buffering orifice that air valve closed buffer piston is changed into two symmetries by one of current mechanism, so at buffer piston the efflux force that takes a seat the in-process and receive through two orifices balanced mutually, improved the air valve and closed buffer piston and fall back to the stability of oil valve disk seat process and then improved the accuracy of valve closing process.

4. The utility model discloses the seal structure of scavenge valve changes the disk seat hole into by present case excircle seal (the contained angle that the excircle of case and the case conical surface formed and the conical surface of disk seat form sealedly) and seals (the contained angle that disk seat hole and conical surface formed and the conical surface of case, and disk seat cone angle slightly is greater than the case cone angle), and guarantees that the diameter of disk seat hole equals with the diameter of case guiding hole (d 2 ═ d1 in fig. 11 promptly), has improved and has resisted the compressor air valve backward flow effect and has promoted the pneumatic valve, and then has transmitted the plunger and make the sealing capacity that the pressure in plunger chamber increases.

5. The utility model discloses connect at the oil inlet and increase lock washer with oil-out joint department, prevent that actuating mechanism from connecting not hard up at two during operation, make internal connection structure more reliable, improved the stability of two cushions.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the air valve opening cushioning assembly and the oil inlet fitting;

FIG. 4 is a schematic structural diagram of a two-position three-way high-speed solenoid valve;

FIG. 5 is a schematic view of the structure of the check valve;

FIG. 6 is a schematic diagram of a valve closing damper piston;

FIG. 7 is a schematic cross-sectional view of a damper piston for closing the air valve;

FIG. 8 is a schematic structural view of an oil inlet locking plate;

FIG. 9 is a schematic structural view of the oil outlet locking plate;

FIG. 10 is a schematic view of the structure of the air valve opening damper assembly;

fig. 11 is a schematic view of a gas valve closing damper assembly.

The labels in the figures are: 1-actuator body, 2-oil inlet joint, 3-two-position three-way high-speed electromagnetic valve, 4-plunger component, 5-oil return joint, 6-air valve opening buffer component, 7-baffle, 8-guide bush, 9-air valve opening buffer piston, 10-air valve opening buffer piston return spring, 11-orifice I, 12-plug, 13-filter screen, 14-oil inlet locking plate, 15-oil outlet locking plate, 16-fastening screw, 17-valve body, 18-valve core, 19-electromagnet component, 20-one-way valve, 21-spring, 22-air valve closing buffer component, 23-air valve closing buffer piston, 24-air valve closing buffer piston return spring, 25-oil return valve seat, 26-orifice two, 27-return valve port, 28-inlet valve port, 29-control port, 30-inlet, 31-return port, 32-one-way valve seat, 33-one-way valve spring, 34-copper pad, 35-valve seat inner hole and 36-valve core guide hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Examples are given. A driving double-buffering execution device of a stepless air quantity regulating air valve of a compressor is shown in figures 1-11 and comprises an execution mechanism main body 1, wherein the upper part of the execution mechanism main body 1 is connected with an oil inlet joint 2, the middle part of the execution mechanism main body is connected with a two-position three-way high-speed electromagnetic valve 3, the lower part of the execution mechanism main body is connected with a plunger component 4, and the left part of the execution mechanism main body is connected with an oil return port joint 5; an air valve opening buffer assembly 6 is arranged in the oil inlet joint 2; and an air valve closing buffer assembly 22 is arranged in the two-position three-way high-speed electromagnetic valve 3.

The air valve opening buffer assembly 6 comprises a baffle 7 arranged at the lower part of the oil inlet connector 2 and a guide bushing 8 arranged in the middle, an air valve opening buffer piston 9 is arranged in the guide bushing 8, a throttling hole I11 is arranged on the air valve opening buffer piston 9, and an air valve opening buffer piston return spring 10 is arranged between the air valve opening buffer piston 9 and the baffle 7; and a plug 12 is arranged at the upper part of the guide bushing 8, and a filter screen 13 is arranged between the plug 12 and the guide bushing 8.

An oil inlet locking plate 14 is sleeved on the oil inlet connector 2; an oil outlet locking plate 15 is sleeved on the oil return port joint 5; the oil inlet locking plate 14 and the oil outlet locking plate 15 are respectively connected with the actuating mechanism body 1 through fastening screws 16.

The two-position three-way high-speed electromagnetic valve 2 comprises a valve body 17, the left part of the valve body 17 is connected with an oil return port joint 5, the middle part of the valve body 17 is provided with a valve core 18, the middle upper part of the valve body is provided with a one-way valve 20, and the right part of the valve body is connected with an electromagnet assembly 19; a spring 21 is sleeved at the right part of the valve core 18; and an air valve closing buffer assembly 22 is arranged between the left part of the valve core 18 and the oil return port joint 5.

The air valve closing buffer assembly 22 comprises an air valve closing buffer piston 23 sleeved on the left portion of the valve core 18, an air valve closing buffer piston return spring 24 is sleeved on the air valve closing buffer piston 23, and an oil return valve seat 25 is arranged on the left side of the air valve closing buffer piston return spring 24.

Two throttle holes 26 which are symmetrically arranged are arranged on the air valve closing buffer piston 23.

The right end of a valve seat inner hole 35 of the oil return valve seat 25 and the left end of the valve core 18 are both arranged in a conical surface manner; the taper angle of the return valve seat 25 is slightly larger than that of the valve core 18, and the diameter d2 of the seat inner hole 35 is equal to the diameter d1 of the valve core guide hole 36 where the valve core 18 is located (the diameter is also the diameter of the right half part of the valve core 18).

The oil return valve seat 25 and the left end position of the valve core 18 form an oil return valve port 27; the middle part of the valve core 18 and the valve body 17 form an oil inlet valve port 28; the lower middle part of the valve body 17 and the upper end of the plunger assembly 4 form a control port 29.

An inlet passage is formed by structures such as an oil inlet 30, an air valve opening buffer assembly 6, a one-way valve 20, an oil inlet valve port 28 and the like; and the oil return passage is composed of structures such as an oil return port 31, an air valve closing buffer assembly 22, an oil return valve port 27 and the like.

The utility model discloses a using-way and theory of operation as follows:

the utility model discloses during the use, the pressure source is connected to oil inlet joint 2, and oil return joint 5 links to each other with the low pressure oil tank, and electromagnet assembly 19 is controlled by automatically controlled ware, and plunger of plunger subassembly 4 can promote admission valve block reciprocating motion through the unloader and make it open or close.

The utility model discloses when two tee bend high speed solenoid valve 3 do not switch on, case 18 pushes up under the spring force effect of spring 21 and leans on return oil valve disk seat 25, and closed return oil valve port 27 closes the return oil valve. The pressure oil enters the plunger pressure cavity of the plunger assembly 4 through an oil inlet passage consisting of the air valve opening buffer assembly 6, the one-way valve 20, the oil inlet valve port 28 of the two-position three-way high-speed electromagnetic valve 3 and the control port 29, so that the plunger moves downwards to drive the air inlet valve of the compressor to reach an open position.

The gas flow control of the stepless air flow regulating system is realized by delaying the closing moment of an air inlet valve of the compressor to the compression stage of a piston of the compressor and controlling the air supply amount by controlling the air return amount before the compressor is effectively compressed, the air return amount is relatively large when the air inlet valve is about to enter the closing stage, the air return amount is further transmitted to a plunger under the action of the air valve of the compressor, the reverse thrust of the air flow on the plunger is relatively large, and in order to provide high hydraulic pressure under the condition of not increasing the oil supply pressure to enable the air valve to be maintained at an opening position, a one-way valve is arranged in an oil supply channel, at the moment, as the oil pressure of a plunger cavity is increased, the one-way valve and an oil return valve are both in a closing state, and the oil in the plunger cavity is locked, so that the air inlet valve can be maintained at the opening position.

The utility model discloses when two tee bend high speed solenoid valve 3 circular telegrams, electromagnet assembly 19 produces the electromagnetic force to case 18, and case 18 moves from a left side right side under the effect of electromagnetic force, opens oil return valve port 27 and makes the oil return route open, closes oil feed valve port 28 and makes the oil feed route close, and the fluid of plunger pressure chamber passes through the pneumatic valve and closes buffer piston 23, oil return valve port 27 and oil tank switch-on. At this time, the plunger moves upwards rapidly due to the action of the return force on the valve plate of the air valve and the return spring force of the air valve. Under the action of the oil return passage hydraulic oil, in the initial stage, the air valve closing buffer piston 23 moves rapidly leftward together with the hydraulic oil due to the action of the oil pressure. When the left end surface of the air valve closing buffer piston 23 is attached to the right end surface of the oil return valve seat 25, the air valve closing buffer piston 23 stops moving, most of the oil return passage is cut off, and only two symmetrical second orifices 26 on the air valve closing buffer piston 23 can return oil. The flow rate of return oil is rapidly reduced, and then the speed of the plunger, the unloader and the valve plate of the air valve is rapidly reduced until the valve plate is slowly seated, thereby realizing the buffer function of first-speed and second-speed.

When the diameter of the plunger and the inner diameter and the outer diameter of the air valve closing buffer piston 23 are the same, the length of the quick movement section of the plunger is determined by the dimension L2 (the distance between the left end face of the air valve closing buffer piston 23 and the right end face of the oil return valve seat 25), and the buffering speed is determined by the hole diameters of the two throttle holes 26 on the air valve closing buffer piston 23.

When the plunger stops moving upward after the air valve is seated, hydraulic oil in the oil return passage stops flowing, the pressure difference acting on the air valve closing buffer piston 23 disappears, and the air valve closing buffer piston 23 moves rightward under the action of the return spring force of the air valve closing buffer piston return spring 24 to return to the original position to prepare for the next cycle.

The utility model discloses when two tee bend high speed solenoid valve 3 outage, case 18 makes return oil valve port 27 close from the right side left motion under the spring 21 restoring force effect of right end armature, and oil feed valve port 28 is opened, and pressure oil passes through the pneumatic valve from oil inlet 30 and opens buffer module 6, check valve 20, two tee bend high speed solenoid valve 3's oil feed valve port 28, control port 29 entering plunger pressure chamber, promotes the plunger downstream, opens the compressor pneumatic valve. At the initial stage of power failure of the two-position three-way high-speed electromagnetic valve 3, under the action of oil pressure, hydraulic oil and the air valve opening air valve buffering piston 9 push the plunger to rapidly move downwards, when the air valve opening air valve buffering piston 9 moves to the position that the lower end face of the air valve opening air valve buffering piston is attached to the baffle 7 and then stops moving, at the moment, the piston is driven to move downwards only by the hydraulic oil of the throttling hole I11 on the air valve opening air valve buffering piston 9, the moving speed of the plunger is rapidly reduced due to the fact that the flow of the hydraulic oil passing through the throttling hole I11 is rapidly reduced until the air valve is slowly seated, and therefore the buffering function of firstly fast and then slow is achieved.

When the diameter of the plunger is equal to the diameter of the air valve opening air valve buffering piston 9, the length of the quick movement section of the air valve opening plunger is determined by L1 (the distance between the lower end surface of the air valve opening air valve buffering piston 9 and the upper end surface of the baffle 7), and the plunger buffering speed is determined by the first orifice 11 on the air valve opening air valve buffering piston 9.

When the air valve of the compressor is completely opened, hydraulic oil in the oil inlet passage stops flowing, the pressure difference acting on the air valve opening air valve buffering piston 9 disappears, and the air valve opening air valve buffering piston 9 moves upwards under the action of the air valve opening buffering piston return spring 10 to restore to the initial position to prepare for the next cycle.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a two buffering final controlling element of drive of stepless tolerance governing pneumatic valve of compressor which characterized in that: the hydraulic oil return device comprises an execution mechanism main body (1), wherein the upper part of the execution mechanism main body (1) is connected with an oil inlet joint (2), the middle part of the execution mechanism main body is connected with a two-position three-way high-speed electromagnetic valve (3), the lower part of the execution mechanism main body is connected with a plunger component (4), and the left part of the execution mechanism main body is connected with an oil return port joint (5); an air valve opening buffer assembly (6) is arranged in the oil inlet joint (2); an air valve closing buffer assembly (22) is arranged in the two-position three-way high-speed electromagnetic valve (3).

2. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 1, characterized in that: the air valve opening buffer assembly (6) comprises a baffle (7) arranged at the lower part of the oil inlet connector (2) and a guide bushing (8) arranged in the middle, an air valve opening buffer piston (9) is arranged in the guide bushing (8), a first throttling hole (11) is formed in the air valve opening buffer piston (9), and an air valve opening buffer piston return spring (10) is arranged between the air valve opening buffer piston (9) and the baffle (7); and a plug (12) is arranged at the upper part of the guide bushing (8), and a filter screen (13) is arranged between the plug (12) and the guide bushing (8).

3. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 1, characterized in that: an oil inlet locking plate (14) is sleeved on the oil inlet joint (2); an oil outlet locking plate (15) is sleeved on the oil return port joint (5); the oil inlet locking plate (14) and the oil outlet locking plate (15) are respectively connected with the actuating mechanism main body (1) through fastening screws (16).

4. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 1, characterized in that: the two-position three-way high-speed electromagnetic valve (3) comprises a valve body (17), the left part of the valve body (17) is connected with an oil return port connector (5), the middle part of the valve body is provided with a valve core (18), the middle upper part of the valve body is provided with a one-way valve (20), and the right part of the valve body is connected with an electromagnet assembly (19); a spring (21) is arranged at the right part of the valve core (18); and an air valve closing buffer assembly (22) is arranged between the left part of the valve core (18) and the oil return port joint (5).

5. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 1, characterized in that: the air valve closing buffer assembly (22) comprises an air valve closing buffer piston (23) sleeved on the left portion of the valve core (18), an air valve closing buffer piston return spring (24) is sleeved on the air valve closing buffer piston (23), and an oil return valve seat (25) is arranged on the left side of the air valve closing buffer piston return spring (24).

6. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 5 is characterized in that: two throttle holes II (26) which are symmetrically arranged are arranged on the air valve closing buffer piston (23).

7. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 5 is characterized in that: the right end of a valve seat inner hole (35) of the oil return valve seat (25) and the left end of the valve core (18) are both arranged in a conical surface manner; the diameter of the valve seat inner hole (35) is equal to that of the valve core guide hole (36) where the valve core (18) is located.

8. The driving double-buffering execution device of the stepless air volume adjusting air valve of the compressor according to claim 5 is characterized in that: the valve seat (25) of the oil return valve and the left end position of the valve core (18) form an oil return valve port (27); the middle part of the valve core (18) and the valve body (17) form an oil inlet valve port (28); the middle lower part of the valve body (17) and the upper end of the plunger assembly (4) form a control port (29).