CN108317004B

CN108317004B - Explosion-proof water-cooling supercharger

Info

Publication number: CN108317004B
Application number: CN201711371432.3A
Authority: CN
Inventors: 李庆华; 王登化; 邱骞; 董兵兵; 陈子林; 张秋根; 赵益乔
Original assignee: Changzhou Development and Manufacture Center Co Ltd
Current assignee: Changzhou Development and Manufacture Center Co Ltd
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2020-04-03
Anticipated expiration: 2037-12-19
Also published as: CN108317004A

Abstract

The invention relates to an explosion-proof water-cooling supercharger. The supercharger comprises a turbine, an intermediate body, a compressor and an exhaust gas bypass mechanism. The waste gas bypass mechanism comprises a silicone tube, a diaphragm valve, a rocker arm and a waste gas bypass valve. The diaphragm valve comprises a shell, a diaphragm valve air inlet pipe, a diaphragm, an inner piston, a piston spring and a push rod. The diaphragm is fixedly connected to the housing. The push rod is connected with the shell in a sliding mode and is connected with the rocker arm in a rotating mode. The inner piston is fixedly connected with the push rod. The lower end of the piston spring is abutted against the shell, and the upper end of the piston spring is abutted against the inner piston. Two ends of the silicone tube are connected to the air outlet small tube of the air compressor and the air inlet tube of the diaphragm valve. The waste gas bypass valve comprises a rotating shaft, a rotating arm, a valve and a sealing sleeve. The rotating shaft is rotatably connected to the sealing sleeve and fixedly connected with the rocker arm. The rotating arm is fixedly connected to the rotating shaft. The valve is fixedly connected to the rotating arm and can be opened or closed and is arranged at an air discharge opening of an air discharge valve hole of the vortex shell. The invention has adjustable pressurizing pressure and good reliability.

Description

Explosion-proof water-cooling supercharger

Technical Field

The invention relates to an explosion-proof water-cooling supercharger for an explosion-proof diesel engine.

Background

Because the ventilation condition of the underground coal mine roadway is limited and the underground coal mine roadway contains gas, only the explosion-proof diesel engine which is modified by explosion-proof design can be used underground. The explosion-proof water-cooled supercharger is used as a core component of an explosion-proof diesel engine, and the performance of the explosion-proof water-cooled supercharger directly influences the dynamic property, the economical efficiency and the harmful substance emission of the explosion-proof diesel engine.

Chinese patent document CN203809104U (application number 201320873299.2) proposes a water-cooled explosion-proof variable supercharging device, which includes a gas compressor, an intermediate body and a turbine, and uses the inertia impulse force of the exhaust gas discharged from an explosion-proof diesel engine to push the turbine in the turbine chamber, and the turbine drives a coaxial impeller, and the impeller pumps the air sent from the air filter pipeline, and the air is supercharged into the cylinder of the explosion-proof diesel engine. When the rotating speed of the engine is increased, the exhaust gas discharge speed and the rotating speed of the turbine are synchronously increased, the impeller compresses more air to enter the cylinder, and the supercharging pressure is higher.

The explosion-proof water-cooling supercharger in the prior art has the following two defects: firstly, the boost pressure can not be adjusted, and the boost pressure that leads to explosion-proof water-cooling booster is when satisfying explosion-proof diesel engine low-speed operating mode air input requirement, and high-speed operating mode boost pressure is too high, and the air input is too much, makes the diesel engine arrange the temperature too high, and harmful NOx discharges greatly increased, seriously pollutes the colliery and goes down the operation environment. When the supercharging pressure of the explosion-proof water-cooling supercharger meets the requirement of air input of an explosion-proof diesel engine under a high-speed working condition, the supercharging pressure under a low-speed working condition is insufficient, the air input is less, and the efficiency of the supercharger is lower. Secondly, because the volute air inlet flange is provided with not only the volute air inlet but also the volute water inlet, when a gasket at the joint of the water-cooling exhaust manifold of the explosion-proof diesel engine and the explosion-proof water-cooling supercharger is damaged under the action of high-temperature waste gas, water at the volute water inlet can enter the volute air inlet, and finally water enters the cylinder of the explosion-proof diesel engine to damage the explosion-proof diesel engine, namely the reliability is poor.

Disclosure of Invention

The invention aims to provide an explosion-proof water-cooling supercharger which is used for an explosion-proof diesel engine and has adjustable supercharging pressure and better reliability.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the explosion-proof water-cooled supercharger comprises a turbine, an intermediate body and a gas compressor; the turbine, the intermediate body and the compressor are fixedly connected in sequence; the turbine is provided with a volute and a turbine, and the turbine is rotationally connected in the volute; the compressor has a compressor housing; the volute comprises an air inlet flange, a volute body and an air outlet flange; the volute body is provided with a waste gas flow passage and a cooling water passage; the turbine is disposed in the exhaust gas flow path; the air inlet flange is provided with an air inlet; the air outlet flange is provided with an air outlet; the gas inlet and the gas outlet are both communicated with a waste gas flow channel; the structure is characterized in that:

the device also comprises an exhaust gas bypass mechanism; the waste gas bypass mechanism comprises a silicone tube, a diaphragm valve, a rocker arm and a waste gas bypass valve; the volute body is also provided with a deflation valve hole and a bypass valve mounting hole; one port of the bypass valve mounting hole faces the outside, and the other port of the bypass valve mounting hole is communicated with an air outlet of the air outlet flange; one port of the bleed valve hole is arranged on the inner wall of the air inlet or at the position of the exhaust gas flow passage close to the air inlet, and the other port of the bleed valve hole is used as a bleed hole and is positioned at the middle part of the bypass valve mounting hole; the gas compressor shell is provided with a small gas outlet pipe which is communicated with the inner cavity of the gas compressor shell; the diaphragm valve comprises a shell, a diaphragm valve air inlet pipe, a diaphragm, an inner piston, a piston spring and a push rod; the diaphragm, the inner piston and the piston spring are all arranged in the shell; the diaphragm valve is directly or indirectly fixedly connected to the volute by the shell; the diaphragm is an elastic element and comprises a flange part and a cylinder part; the flange part is fixedly connected to the shell; the air inlet pipe of the diaphragm valve is arranged on the shell and is communicated with the inner cavity of the shell; the push rod is connected with the shell in a sliding mode, and the lower end of the push rod is rotatably connected with one end of the rocker arm; the inner piston is fixedly connected with the upper end of the push rod and abuts against the upper end part of the cylinder body part of the diaphragm; the lower end of the piston spring is abutted against the shell, and the upper end of the piston spring is abutted against the inner piston; one end of the silicone tube is connected to the small air outlet pipe, the inner cavity of the silicone tube is communicated with the inner cavity of the air compressor shell 31 through the small air outlet pipe, the other end of the silicone tube is connected to the air inlet pipe of the diaphragm valve, and the inner cavity of the silicone tube is communicated with the inner cavity of the shell through the air inlet pipe of the diaphragm valve; the waste gas bypass valve comprises a rotating shaft, a rotating arm, a valve and a sealing sleeve; the sealing sleeve is arranged in a bypass valve mounting hole of the vortex shell; the rotating shaft is rotatably connected to the sealing sleeve, and the outer end of the rotating shaft is fixedly connected with the other end of the rocker arm; the rotating arm is fixedly connected to the inner end of the rotating shaft; the valve is fixedly connected to the rotating arm; the valve is arranged at the air outlet of the air bleed valve hole of the vortex shell.

A turbine shell of the explosion-proof water-cooling supercharger is provided with a water inlet and a water outlet; the water inlet and the water outlet are both communicated with the cooling water channel.

And a cooling water channel of the explosion-proof water-cooling supercharger extends to the air inlet flange of the volute and is not communicated with the outer end surface of the air inlet flange.

The diameter of the cooling water channel of the explosion-proof water-cooling supercharger is 10-12 mm.

The sealing sleeve of the explosion-proof water-cooling supercharger is arranged at a section close to the outside in a bypass valve mounting hole of the turbine shell, and cooling water channels are arranged around the section.

A volute casing of the explosion-proof water-cooling supercharger is also provided with a volute casing steam outlet, a process hole and a mounting hole; the mounting hole is used for mounting a rotating arm and a valve of the waste gas bypass valve.

The explosion-proof water-cooling supercharger also comprises a diaphragm valve bracket; the diaphragm valve bracket is fixedly connected to the volute body through a bolt; the shell is fixedly connected to the diaphragm valve support.

The lower end head of a push rod of the explosion-proof water-cooling supercharger is rotatably connected with one end of the rocker arm through a pin shaft.

The port of the volute water inlet, the volute water outlet, the volute steam outlet and the process hole of the explosion-proof water-cooling supercharger are all provided with internal threads.

The beneficial effects obtained by the invention are as follows: (1) because the air outlet small pipe of the compressor shell is connected with the air inlet pipe of the diaphragm valve through the silicone tube, when the supercharging pressure of the compressor is low, the diaphragm moves upwards under the action of the piston spring and drives the push rod and the rocker arm to close the valve of the waste gas bypass valve, so that all waste gas drives the turbine to realize air inlet supercharging. When the boost pressure is higher, the boost pressure overcomes the elasticity of the piston spring, the diaphragm is pushed to move downwards, and the push rod and the rocker arm are driven to open the valve of the waste gas bypass valve, so that part of waste gas is directly discharged from the gas outlet of the volute after passing through the gas discharge valve hole without passing through the turbine, the purpose of controlling the boost pressure and the rotating speed of the supercharger is achieved, and the boost pressure is adjustable. (2) The volute body is provided with the water inlet and the water outlet, so that the volute air inlet flange is not required to be provided with the volute water inlet. When the gasket at the joint of the water-cooling exhaust manifold of the explosion-proof diesel engine and the explosion-proof water-cooling supercharger is damaged under the action of high-temperature waste gas, water at the water inlet of the volute cannot enter the air inlet of the volute and cannot enter the cylinder of the explosion-proof diesel engine to damage the explosion-proof diesel engine, and the reliability is good.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention, and is also a schematic view from above of fig. 2.

Fig. 2 is a schematic bottom view of fig. 1.

Fig. 3 is a schematic left side view of fig. 2.

Fig. 4 is a rear view schematic of fig. 2.

Fig. 5 is a schematic view of section a-a of fig. 1.

Fig. 6 is a schematic partial cross-sectional view B-B of fig. 4.

Fig. 7 is a schematic partial cross-sectional view of C-C of fig. 3.

Fig. 8 is a schematic view of section D-D of fig. 3.

Fig. 9 is a view in the direction E of fig. 2.

Fig. 10 is a perspective view of the present invention.

Fig. 11 is a perspective view of the turbine of fig. 10.

Fig. 12 is a perspective view of the intermediate body of fig. 10.

Fig. 13 is a schematic perspective view of the compressor of fig. 10.

The reference numbers in the above figures are as follows:

the turbine 1, the volute 10, the air inlet flange 11, the air inlet 11-1, the volute body 12, the air relief valve hole 12-1, the waste gas runner 12-2, the cooling water channel 12-3, the bypass valve mounting hole 12-4, the water inlet 12-5, the water outlet 12-6, the steam exhaust port 12-7, the process hole 12-8, the mounting hole 12-9, the air outlet flange 13, the air outlet 13-1, the connecting port 14, the turbine 15, the intermediate body 2, the rear connecting port 21, the front connecting port 22, the compressor 3, the compressor shell 31, the air inlet 31-1, the air exhaust port 31-2, the connecting port 31-3, the air outlet small pipe 32, the impeller 33, the waste gas bypass mechanism 40, the silicone tube 4, the diaphragm valve 5, the shell 51, the inner cavity 51-1, the air inlet tube 52, the diaphragm 53, the flange part, the cylinder body part 53-2, the inner piston 54, the piston spring 55, the push rod 56, the rocker arm 6, the pin 61, the waste gate valve 7, the rotating shaft 71, the rotating arm 72, the valve 73, the sealing sleeve 74, the diaphragm valve bracket 8 and the bolt 81.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

(example 1)

Referring to fig. 1, 5 and 10, the explosion-proof water-cooled supercharger of the present embodiment includes a turbine 1, an intermediate body 2, a compressor 3 and an exhaust gas bypass mechanism 40. The turbine 1, the intermediate body 2 and the compressor 3 are fixedly connected in sequence from front to back. The exhaust gas bypass mechanism 40 is connected between the compressor 3 and the turbine 1. The waste gas bypass mechanism 40 comprises a silicone tube 4, a diaphragm valve 5, a rocker arm 6, a waste gas bypass valve 7 and a diaphragm valve bracket 8. The intermediate body 2 is a steel integral body and is provided with an inner cavity communicated with the front and the rear, and a front connecting port 22 and a rear connecting port 21.

Referring to fig. 10 and 5, the turbine 1 has a volute 10 and a turbine 15, and the volute 10 and the turbine 15 are both made of a steel integral piece. The turbine 15 is rotatably coupled in the scroll 10. The volute 10 is provided with an exhaust gas inlet, an exhaust gas outlet and a connection port 14. The volute 10 is fixedly connected by its connection port 14 to the front connection port 22 of the intermediate body 2.

The compressor 3 (also called compressor), see fig. 13, has a compressor casing 31 and an impeller 33, both of which are made in one piece of steel. The compressor shell 31 is provided with an air inlet 31-1, an air outlet 31-2 and a connecting port 31-3, and the compressor shell 31 is also provided with an air outlet small pipe 32. The small air outlet pipe 32 is communicated with the inner cavity of the compressor shell 31. The compressor casing 31 is fixedly connected with the rear connecting port 21 of the intermediate body 2 through the connecting port 31-3. The impeller 33 is coaxially connected to the turbine 15 by means of a respective rotating shaft, and said shaft passes through the internal cavity of the intermediate body 2.

Referring to fig. 4 to 8, the scroll 10 further includes an inlet flange 11, a scroll body 12, and an outlet flange 13. The air inlet flange 11 is provided with an air inlet 11-1, and the air inlet 11-1 is an exhaust gas inlet of the volute 10. The air outlet flange 13 is provided with an air outlet 13-1, and the air outlet 13-1 is the waste gas outlet of the volute 10.

Referring to fig. 5 to 8, the scroll casing 12 is provided with a bleed valve hole 12-1, an exhaust gas flow passage 12-2, a cooling water passage 12-3, a bypass valve mounting hole 12-4, a water inlet 12-5, a water outlet 12-6, a steam outlet 12-7, a related process hole 12-8 and a mounting hole 12-9. Wherein the water inlet 12-5, the cooling water channel 12-3 and the water outlet 12-6 are communicated in sequence, and the steam outlet 12-7 and the fabrication hole 12-8 are also arranged on the cooling water channel 12-3. An air inlet 11-1 of the air inlet flange 11, an exhaust gas flow passage 12-2 of the volute body 12 and an air outlet 13-1 of the air outlet flange 13 are communicated in sequence. One port of the bypass valve mounting hole 12-4 of the scroll case 12 faces the outside, and the other port is communicated with the air outlet 13-1 of the air outlet flange 13. One port of the relief valve hole 12-1 is opened on the inner wall of the intake port 11-1 or at a position of the exhaust gas flow passage 12-2 near the intake port 11-1, and the other port is located at the middle of the bypass valve mounting hole 12-4 as a relief port (see fig. 6). The turbine 15 is disposed in the exhaust gas flow passage 12-2. The mounting holes 12-9 are used for mounting the rotary arm 72 and the valve 73 of the wastegate valve 7.

Referring to fig. 2 and 7, the diaphragm valve 5 includes a housing 51 and a push rod 56, and further includes a diaphragm 53, an inner piston 54, and a piston spring 55 provided in the housing 51. The housing 51 is a unitary piece of steel, and the housing 51 includes an inlet tube 52, the inlet tube 52 being connected to the main body of the housing 51 and communicating with the interior 51-1 of the housing 51. The diaphragm valve 5 is fixedly connected to the diaphragm valve bracket 8 through the housing 51, and the diaphragm valve bracket 8 is fixedly connected to the volute 10.

Referring to fig. 7, the diaphragm 53 is an elastic element, is a single piece, and is made of silicon rubber, and the diaphragm 53 includes a flange portion 53-1 and a cylindrical portion 53-2. The upper end of the cylindrical body portion 53-2 is sealed, and the lower end of the cylindrical body portion 53-2 is connected to the flange portion 53-1. The diaphragm 53 is fixedly attached to the housing 51 by its flange portion 53-1. The push rod 56 is a member formed by fixedly connecting inner and outer rod members together. The outer rod piece of the push rod 56 is sleeved on the lower end head of the inner rod piece by the upper end thereof, and the outer rod piece and the inner rod piece are fixedly connected through 2 pins. The outer rod is rotatably connected with one end of the rocker arm 6 through a pin 61 by the lower end head of the outer rod. The inner rod piece of the push rod 56 is connected with the shell 51 in a sliding way, and the upper end of the inner rod piece is fixedly connected with the inner piston 54. The inner piston 54 abuts from below to above the upper end portion of the cylindrical body portion 53-2 of the diaphragm 53. The piston spring 55 is a compression spring, and has a lower end abutting against the housing 51 and an upper end abutting against the inner piston 54.

Referring to fig. 1, one end of the silicone tube 4 is connected to the small outlet pipe 32, the inner cavity of the silicone tube 4 is communicated with the inner cavity of the compressor housing 31 through the small outlet pipe 32, the other end of the silicone tube 4 is connected to the air inlet pipe 52 of the diaphragm valve 5, and the inner cavity of the silicone tube 4 is communicated with the inner cavity 51-1 of the housing 51 through the air inlet pipe 52 of the diaphragm valve 5.

Referring to fig. 6, 7 and 8, the wastegate valve 7 includes a rotary shaft 71, a rotary arm 72, a valve 73 and a seal sleeve 74. The rotating arm 72, the valve 73 and the sealing sleeve 74 are all made of steel and are arranged in the bypass valve mounting hole 12-4, most of the rotating shaft 71 is arranged in the bypass valve mounting hole 12-4, and the outer end of the rotating shaft extends out of the scroll housing 12.

Referring to fig. 6 and 8, the sealing sleeve 74 is disposed in the bypass valve mounting hole 12-4 of the turbine housing 12 in a close fit manner in a section of the bypass valve mounting hole 12-4 close to the outside. The rotating shaft 71 of the wastegate valve 7 is rotatably connected to the seal bushing 74 and is located in the seal bushing 74. The outer end of the rotating shaft 71 is fixedly connected with the other end of the rocker arm 6. The rotating arm 72 is a circular sleeve body and is provided with a radial insertion hole; the valve 73 is provided with a round valve body connected with a plug in the center of the valve body, and the valve 73 is fixed on the plug hole of the rotating arm 72 by the plug in a tight fit manner, so that the valve 73 is fixedly connected on the rotating arm 72. When assembling, the swivel arm 72 to which the valve 73 is connected is put into the scroll case 12 from the mounting hole 12-9 of the scroll case 12, and an auxiliary jig is provided at the time of assembling, so that one end of the swivel arm 72 close to the outlet port 13-1 of the outlet flange 13 is axially restrained. The rotating shaft 71 extends into the sealing sleeve 74 from the opening of the bypass valve mounting hole 12-4 of the turbine housing 12, and the inner end of the rotating shaft 71 extends inwards out of the sealing sleeve 74 and is inserted into the inner cavity of the rotating arm 72 in a tight fit manner, so that the rotating arm 72 is fixedly sleeved on the inner end of the rotating shaft 71. And then the auxiliary clamp is removed. At this time, the rotation of the rotation shaft 71 allows the valve body of the valve 73 to be disposed at the discharge port of the discharge valve hole 12-1 of the scroll case 12. When in use, the rotating arm 72 rotates along with the rotation of the rotating shaft 71, and drives the valve main body of the valve 73 to be in a state of opening or closing the deflation valve hole 12-1 of the volute casing 12.

When the valve 73 opens the discharge port connected to the discharge valve hole 12-1 of the scroll case 12, part of the exhaust gas is discharged directly from the discharge valve hole 12-1 through the outlet port 13-1 without passing through the turbine 15, and when the valve 73 closes the discharge port connected to the discharge valve hole 12-1 of the scroll case 12, all of the exhaust gas is driven to the turbine 15 so that the intake boost pressure is high.

Referring to fig. 5, the cooling water channel 12-3 extends to the air intake flange 11 of the volute 1 and is not communicated with the outer end surface of the air intake flange 11, so that the cooling effect is better. The diameter of the cooling water channel 12-3 is 10-12 mm. And cooling water channels 12-3 are arranged around the part, provided with the sealing sleeve 74, of the bypass valve mounting hole 12-4. The steam outlet 12-7 arranged on the vortex shell 12 is provided with a corresponding steam exhaust device, and the fabrication hole 12-8 is blocked by a threaded plug when in use. The ports of the water inlet 12-5, the water outlet 12-6, the steam exhaust port 12-7 and the fabrication hole 12-8 are all provided with internal threads.

Referring to fig. 1, the diaphragm valve bracket 8 is fixedly connected to the scroll housing 12 by bolts 81; the housing 51 is fixedly connected to the diaphragm valve support 8. Referring to fig. 1, 2 and 6 to 8, the operation principle of the supercharger of the present embodiment for adjusting the boost pressure is as follows: when the explosion-proof diesel engine is started, exhaust gas discharged from a cylinder of the diesel engine enters the turbine 1 through the air inlet 11-1 of the volute 10 to drive the turbine 15 to rotate, and the impeller 33 of the compressor 3 coaxial with the turbine rotates along with the turbine. With the rotation of the impeller 33, fresh air is sucked in through the air inlet 31-1 and is sent into the cylinder of the diesel engine through the air outlet 31-2.

The pressure of the gas in the inner chamber 51-1 of the housing 51 of the diaphragm valve 5 is normal pressure under normal conditions, and the valve 73 of the wastegate valve 7 is in a state of closing the relief port of the relief valve hole 12-1 of the scroll housing 12 by the action of the piston spring 55. When the amount of exhaust gas discharged from the cylinder of the diesel engine is small, the rotation speed of the turbine 15 is low, and the boost pressure of the compressor 3 is also low, so that the valve 73 keeps the state of closing the air release port unchanged.

Along with the increase of the rotating speed of the cylinder of the diesel engine, the amount of the exhaust gas discharged by the cylinder is increased, the rotating speed of the turbine 15 and the impeller 33 is increased, the pressure of the compressor 3 is increased, the gas pressure entering the inner cavity 51-1 of the shell 51 from the small gas outlet pipe 32 on the gas outlet end of the compressor shell 31 through the silicon rubber pipe 4 and the diaphragm valve gas inlet pipe 52 is higher, the inner piston 54 of the diaphragm valve 5 moves downwards under the action of the gas pressure against the action force of the piston spring 55, the inner piston 54 drives the push rod 56 to move downwards, and the push rod 56 drives the rocker arm 6 to enable the rotating shaft 71 of the waste gas bypass valve. The rotating shaft 71 rotates the rotating arm 72 in the forward direction, and the rotating arm 72 drives the valve 73 to open the relief opening of the relief valve hole 12-1 of the scroll housing 12, i.e., to open the wastegate valve 7. At this time, part of the exhaust gas is directly discharged from the outlet 13-1 through the bleed valve hole 12-1 without passing through the turbine 15, thereby achieving the purpose of controlling the boost pressure to achieve the reduction of the boost pressure. If the amount of exhaust gas discharged from the cylinder is further increased, the wastegate valve 7 is made to open more until it tends to be fully open. As the degree of opening of the wastegate valve 7 increases, more and more exhaust gas is directly discharged, thereby restricting the increase in the rotational speed of the turbine 15 and the impeller 33.

When the waste gate valve 7 is opened to a greater extent, if the rotation speed of the diesel engine cylinder is reduced, the pressure of the gas entering the inner cavity 51-1 of the housing 51 from the small outlet pipe 32 of the compressor housing 31 through the silicone pipe 4 and the diaphragm valve air inlet pipe 52 is reduced, the inner piston 54 of the diaphragm valve 5 moves up under the action of the piston spring 55, the inner piston 54 drives the push rod 56 to move up, and the push rod 56 drives the rocker arm 6 to rotate the rotating shaft 71 of the waste gate valve 7 in the opposite direction. The reverse rotation of the rotary shaft 71 drives the rotary arm 72 to rotate reversely, and the valve 73 driven by the rotary arm 72 increases the degree of closure of the discharge port of the discharge valve hole 12-1 of the scroll housing 12, that is, the wastegate valve 7 is finally closed. In this way, the exhaust gases discharged by the diesel cylinders are all used to drive the turbine 15, thereby achieving an increase in boost pressure.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or scope of the invention as defined in the appended claims.

Claims

1. An explosion-proof water-cooled supercharger comprises a turbine (1), an intermediate body (2) and a compressor (3); the turbine (1), the intermediate body (2) and the compressor (3) are fixedly connected in sequence; the turbine (1) is provided with a volute (10) and a turbine (15), wherein the turbine (15) is rotationally connected in the volute (10); the compressor (3) has a compressor housing (31); the volute (10) comprises an air inlet flange (11), a volute body (12) and an air outlet flange (13); an exhaust gas flow passage (12-2) and a cooling water passage (12-3) are arranged on the vortex shell (12); the turbine (10) is arranged in an exhaust gas flow passage (12-2); the air inlet flange (11) is provided with an air inlet (11-1); the air outlet flange (13) is provided with an air outlet (13-1); the air inlet (11-1) and the air outlet (13-1) are both communicated with the waste gas flow channel (12-2); the method is characterized in that:

the device also comprises an exhaust gas bypass mechanism (40); the waste gas bypass mechanism (40) comprises a silicone tube (4), a diaphragm valve (5), a rocker arm (6) and a waste gas bypass valve (7); the volute body (12) is also provided with a bleed valve hole (12-1) and a bypass valve mounting hole (12-4); one port of the bypass valve mounting hole (12-4) faces the outside, and the other port is communicated with an air outlet (13-1) of the air outlet flange (13); one port of the vent valve hole (12-1) is arranged on the inner wall of the air inlet (11-1) or at the position of the exhaust gas flow passage (12-2) close to the air inlet (11-1), and the other port is used as a vent hole and is positioned at the middle part of the bypass valve mounting hole (12-4); the gas compressor shell (31) is provided with a small gas outlet pipe (32), and the small gas outlet pipe (32) is communicated with the inner cavity of the gas compressor shell (31); the diaphragm valve (5) comprises a shell (51), a diaphragm valve air inlet pipe (52), a diaphragm (53), an inner piston (54), a piston spring (55) and a push rod (56); the diaphragm (53), the inner piston (54) and the piston spring (55) are all arranged in the shell (51); the diaphragm valve (5) is directly or indirectly fixedly connected to the volute (10) through a shell (51); the diaphragm (53) is an elastic element and comprises a flange part (53-1) and a barrel part (53-2); the flange part (53-1) is fixedly connected to the shell (51); an air inlet pipe (52) of the diaphragm valve (5) is arranged on the shell (51) and is communicated with an inner cavity (51-1) of the shell (51); the push rod (56) is connected with the shell (51) in a sliding mode, and the lower end of the push rod (56) is rotatably connected with one end of the rocker arm (6); the inner piston (54) is fixedly connected with the upper end of the push rod (56), and the inner piston (54) abuts against the upper end part of the cylinder body part (53-2) of the diaphragm (53); the lower end of the piston spring (55) is abutted against the shell (51), and the upper end of the piston spring is abutted against the inner piston (54); one end of the silicone tube (4) is connected to the small air outlet pipe (32), the inner cavity of the silicone tube (4) is communicated with the inner cavity of the air compressor casing (31) through the small air outlet pipe (32), the other end of the silicone tube (4) is connected to the air inlet pipe (52) of the diaphragm valve (5), and the inner cavity of the silicone tube (4) is communicated with the inner cavity (51-1) of the casing (51) through the air inlet pipe (52) of the diaphragm valve (5); the waste gas bypass valve (7) comprises a rotating shaft (71), a rotating arm (72), a valve (73) and a sealing sleeve (74); the sealing sleeve (74) is installed in a bypass valve installation hole (12-4) of the turbine shell (12); the rotating shaft (71) is rotatably connected to the sealing sleeve (74), and the outer end of the rotating shaft (71) is fixedly connected with the other end of the rocker arm (6); the rotating arm (72) is fixedly connected to the inner end of the rotating shaft (71); the valve (73) is fixedly connected to the rotating arm (72); the valve (73) is arranged at the air outlet of the air outlet valve hole (12-1) of the volute body (12).

2. The explosion-proof water-cooled supercharger of claim 1 wherein: the vortex shell (12) is provided with a water inlet (12-5) and a water outlet (12-6); the water inlet (12-5) and the water outlet (12-6) are both communicated with the cooling water channel (12-3).

3. The explosion-proof water-cooled supercharger of claim 1 wherein: the cooling water channel (12-3) extends to the position of an air inlet flange (11) of the volute (10) and is not communicated with the outer end face of the air inlet flange (11).

4. The explosion-proof water-cooled supercharger of claim 1 wherein: the diameter of the cooling water channel (12-3) is 10-12 mm.

5. The explosion-proof water-cooled supercharger of claim 1 wherein: the sealing sleeve (74) is arranged at a section, close to the outside, in a bypass valve mounting hole (12-4) of the vortex shell (12), and cooling water channels (12-3) are arranged on the periphery of the section.

6. The explosion-proof water-cooled supercharger of claim 1 wherein: the turbine shell (12) is also provided with a steam outlet (12-7), a process hole (12-8) and a mounting hole (12-9); the mounting holes (12-9) are used for mounting a rotating arm (72) and a valve (73) of the waste gate valve (7).

7. The explosion-proof water-cooled supercharger of claim 1 wherein: the diaphragm valve bracket (8) is also included; the diaphragm valve support (8) is fixedly connected to the volute body (12) through a bolt (81); the shell (51) is fixedly connected to the diaphragm valve support (8).

8. The explosion-proof water-cooled supercharger of claim 1 wherein: the lower end head of the push rod (56) is rotatably connected with one end of the rocker arm (6) through a pin shaft (61).

9. The explosion-proof water-cooled supercharger of claim 2 wherein: the ports of the water inlet (12-5) and the water outlet (12-6) are provided with internal threads.

10. The explosion-proof water-cooled supercharger of claim 6 wherein: the ports of the steam exhaust port (12-7) and the fabrication hole (12-8) are provided with internal threads.