A screw head

Abstract

The application relates to the technical field of air compressors, in particular to a screw head, which comprises a screw head, one side of the screw head is fixedly provided with a transmission cavity, the inner side of the end, away from the screw head, of the transmission cavity is provided with a centrifugal control assembly, the centrifugal control assembly comprises two groups of transmission shafts, and the transmission shafts are rotationally arranged on the inner side of the transmission cavity, the application has the advantages that the cooperation of the centrifugal control assembly and the transmission shaft and other structures facilitates the opening of the guide valve structure in the movable valve body by the distance change of the counterweight block caused by centrifugal force driven by the rotation of the transmission shaft, thereby the flow into the transmission cavity is controlled to ensure that the gear meshing surface is fully lubricated, the dry grinding condition is avoided, the lubricating oil is increased when high-speed rotation is realized to avoid dry grinding, the service life of the device can be prolonged, the lubricating oil is reduced when low-speed rotation is realized to avoid the power loss problem caused by the high speed and the large amount of lubricating oil.

Description

Technical Field

[0001] This application relates to the field of air compressor technology, and in particular to a screw compressor head. Background Technology

[0002] The screw compressor head is an important air compression structure. It uses a motor to drive the screw of the screw compressor head to rotate, and then uses gears to make two sets of screws rotate synchronously. The meshing space between the screws drives the gas into the interior of the screw compressor head and assists in compression to achieve the effect of air compression.

[0003] Regarding the aforementioned technologies, existing screw mechanisms require the transmission of the rotational kinetic energy of the drive motor through a gear structure, which necessitates the gear structure to bear a large torque. To prevent damage to the gear structure due to temperature or insufficient lubrication, it is necessary to continuously inject lubricating oil into the transmission cavity for auxiliary lubrication and cooling. However, injecting a large amount of oil will increase the rotational resistance of the screw head due to the large space occupied by the oil inside, resulting in increased energy consumption and power loss. Summary of the Invention

[0004] The purpose of this application is to provide a screw compressor head.

[0005] In the first aspect, the screw head provided in this application adopts the following technical solution: a screw head, including a screw head, wherein a transmission cavity is fixedly installed on one side of the screw head, and a centrifugal control component is provided on the inner side of the end of the transmission cavity away from the screw head;

[0006] The centrifugal control assembly includes two sets of drive shafts, and the drive shafts are rotatably arranged inside the transmission cavity. A balance bar is welded and installed on both sides of the end of the drive shaft away from the screw head, and a guide frame is welded and installed on the side of the balance bar away from the screw head. A sliding bracket is slidably arranged on the inner side of the guide frame. A support spring is provided on the front of the sliding bracket and the inner side of the guide frame. A counterweight is installed on the front of the sliding bracket.

[0007] The centrifugal control assembly includes a movable valve body, which is fixedly installed on the inner wall of the transmission cavity away from the screw head. A guide valve is slidably installed in the middle of the movable valve body, and a connecting column is installed in the middle of the guide valve near the counterweight. An arc-shaped push block is installed on the side of the connecting column away from the guide valve.

[0008] Preferably, a limiting guide post is fixedly installed in the middle of the guide frame, and the sliding bracket is slidably disposed outside the limiting guide post, with the limiting guide post located inside the supporting spring.

[0009] Preferably, two sets of stabilizing guide rods are installed on the inner side of the sliding bracket, and the stabilizing guide rods are slidably disposed on the inner side of the guide frame near the counterweight block.

[0010] Preferably, the top and bottom of the movable valve body are equipped with oil injection pipes, the lower end of which is fixedly connected to the transmission cavity, and the pilot valve has a valve body channel in the middle.

[0011] Preferably, two sets of stabilizing rods are fixedly installed on the side of the arc-shaped push block near the movable valve body, and a movable disc is installed on the end of the stabilizing rod away from the arc-shaped push block. The movable disc is slidably disposed in the movable cavity inside the movable valve body. A return spring is provided on the side of the movable disc away from the stabilizing rod. The transmission cavity can provide restraint for the inner structure. The rotational kinetic energy of the drive shaft can be transmitted through the transmission shaft. The balance bar is used to provide an installation position for the guide frame. The guide frame can be used to stably slide the sliding bracket for inner sliding adjustment. The inner limiting guide post and stabilizing guide rod can further increase the sliding stability of the sliding bracket. The counterweight at the end of the sliding bracket has a certain weight. When the transmission shaft rotates at high speed, it drives the counterweight. The valve rotates synchronously, and because the counterweight is in a non-fixed state, it gradually moves outward under centrifugal force to compress the support spring. The movable valve body provides an installation position for the inner structure. Lubricating oil can be added into the transmission chamber through the channel inside the oil injection pipe. During the stay of the pilot valve, the valve body channel overlaps with the through hole in the middle of the oil injection pipe to guide the lubricating oil into the transmission chamber. The arc-shaped push block and the pilot valve can be connected by the connecting column. By using the cooperation of the stabilizer bar and the movable plate, the arc-shaped push block can be kept to move stably along the inner channel to adjust the position of the pilot valve. The return spring can push the pilot valve to return to its original position when the counterweight and the arc-shaped push block are not in contact, ensuring that the pilot valve can be adjusted and returned to its original position normally.

[0012] Preferably, the top and bottom of the screw head are equipped with mounting platforms, and a dustproof component is spliced ​​onto the side of the mounting platform away from the screw head.

[0013] Preferably, the dustproof component includes a sealing disc, and a combination bolt is embedded in the inner side of the four corners of the sealing disc. The combination bolt is movably embedded in the inner side of the mounting platform. A connecting pipe is installed on the inner side of the sealing disc, and a fixing ring is installed on the side of the connecting pipe near the mounting platform. A limit rod is installed on the inner side of the fixing ring, and two sets of push rods are installed at the bottom of the limit rod.

[0014] Preferably, the inner wall of the mounting platform is provided with eight sets of limiting slide grooves, and a limiting slide post is slidably provided on the inner side of the limiting slide groove. A movable ring is installed in the middle of the limiting slide post, and two sets of torsion spring shafts are embedded in the inner side of the movable ring. A set of flip-top sealing cover is installed between the two sets of torsion spring shafts. The push rod is movably disposed on one side of the flip-top sealing cover. A retaining ring is installed on one side inside the movable ring, and the retaining ring is located inside the push rod. A fixing spring is provided between the bottom of the movable ring and the mounting platform.

[0015] Preferably, a limiting shaft cover is installed on the other side of the screw head, and a water-cooling cavity is formed on the inner wall of the screw head. The water-cooling cavity is equipped with a connection port. A drive shaft is rotatably mounted on the inner side of the limiting shaft cover via a bearing, and the drive shaft is fixedly connected to a transmission shaft. A meshing screw is fixedly mounted on the outer side of the transmission shaft near the screw head, and the meshing screw is rotatably mounted inside the screw head. A sealing plate is installed on the side of the transmission cavity away from the screw head, and a combined cover is bolted to the side of the sealing plate away from the screw head. An oil drain pipe is installed at the bottom of the transmission cavity.

[0016] Preferably, a meshing gear is spliced ​​and fixedly installed on the outer side of the drive shaft, and a bearing isolator is installed in the middle of the drive shaft. The bearing isolator is assembled on the inner side of the drive cavity near the screw head, and a locking nut is installed on the side of the meshing gear away from the bearing isolator.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. This invention, through the coordination of centrifugal control components and a drive shaft, utilizes the rotation of the drive shaft to drive the counterweight, causing a distance change due to centrifugal force, which in turn opens the guide valve structure inside the movable valve body. This controls the flow rate into the transmission chamber, ensuring sufficient lubrication of the gear meshing surfaces and preventing dry friction. The balance bar provides an installation position for the guide frame, which in turn restricts the sliding of the sliding bracket slidably mounted on the inner side. When the drive shaft and balance bar rotate at high speed, the counterweight expands under centrifugal force, compressing the support spring. Furthermore, the rotation of the counterweight... The arc-shaped pusher will contact the return spring and squeeze it. The arc-shaped pusher will increase the oil intake by adjusting the overlap area between the valve body channel and the oil injection pipe through the outward extension of the limit guide post. Due to the principle of rotational speed, the two sets of counterweights can quickly take turns resisting the arc-shaped pusher to prevent it from resetting. The centrifugal force of the counterweight is greater than the elastic force of the return spring, which can ensure that the oil intake is adjusted by squeezing to change the amount of lubricating oil inside the transmission cavity. When rotating at high speed, the lubricating oil increases to avoid dry friction and can extend the service life of the device. When rotating at low speed, the lubricating oil decreases to avoid the power loss problem caused by the low speed and excessive lubricating oil.

[0019] 2. This invention, through the combination of dustproof components and mounting platform, facilitates the sealing of gas inlets and outlets via the dustproof components. This prevents debris and dust from entering the interior during maintenance and disassembly, thus avoiding damage and deformation of the screw structure. The mounting platform effectively restricts the inner movable ring, while the bottom fixing spring pushes the movable ring to slide vertically along the limiting groove. The fixing ring and limiting rod provide mounting positions for two sets of push rods at the bottom. One set of push rods is long, and the other is short. The long rod first contacts the flip-top closing cover vertically along the torsion spring shaft. After reaching the vertical position, the other set of short rods will lock onto the other side of the flip-top closing cover, thereby restricting the flip-top closing cover. When the sealing disc is disassembled, the torsion spring shaft will drive the flip-top closing cover to reset. After reset, the retaining ring will restrict the flip-top closing cover structure, ensuring that the flip-top closing cover is closed in a horizontal state, preventing dust from entering the interior and damaging the screw structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0021] Figure 2 This is a schematic diagram of the centrifugal control component structure according to Embodiment 1 of this application;

[0022] Figure 3 This is a schematic cross-sectional view of the counterweight block in Embodiment 1 of this application;

[0023] Figure 4 This is a schematic cross-sectional view of the movable valve body in Embodiment 1 of this application;

[0024] Figure 5 This is Embodiment 1 of this application. Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This is Embodiment 1 of this application. Figure 2 Enlarged structural diagram at point B.

[0026] Explanation of reference numerals in the attached drawings: 100, screw head; 101, limiting shaft cover; 102, transmission cavity; 103, mounting platform; 104, limiting slide groove; 105, water cooling cavity; 106, drive shaft; 107, meshing screw; 108, sealing plate; 109, combined cover; 110, oil drain pipe;

[0027] 001. Dustproof component; 200. Connecting pipe; 201. Sealing disc; 202. Combination bolt; 203. Retaining ring; 204. Limiting rod; 205. Push rod; 206. Moving ring; 207. Limiting slide; 208. Retaining ring; 209. Torsion spring shaft; 210. Flip-up sealing cover; 211. Fixing spring;

[0028] 300. Meshing gear; 301. Bearing isolator; 302. Drive shaft; 303. Lock nut; 304. Balance bar;

[0029] 002. Centrifugal control assembly; 400. Counterweight; 401. Guide frame; 402. Limiting guide post; 403. Support spring; 404. Sliding bracket; 405. Stabilizing guide rod;

[0030] 500. Pilot valve; 501. Movable valve body; 502. Oil injection pipe; 503. Return spring; 504. Movable disc; 505. Stabilizer bar; 506. Connecting column; 507. Valve body passage; 508. Arc-shaped push block. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 This application will be described in further detail below.

[0032] Example 1: This invention provides a screw compressor head, referring to... Figures 1 to 6 The screw head 100 is included. A transmission cavity 102 is fixedly installed on one side of the screw head 100, and a centrifugal control component 002 is provided on the inner side of the end of the transmission cavity 102 away from the screw head 100.

[0033] The centrifugal control assembly 002 includes two sets of drive shafts 302, and the drive shafts 302 are rotatably disposed inside the transmission cavity 102. A balance bar 304 is welded and installed on both sides of the end of one set of drive shafts 302 away from the screw head 100. A guide frame 401 is welded and installed on the side of the balance bar 304 away from the screw head 100. A sliding bracket 404 is slidably disposed on the inner side of the guide frame 401. A support spring 403 is disposed on the front side of the sliding bracket 404 and the inner side of the guide frame 401. A counterweight 400 is installed on the front side of the sliding bracket 404.

[0034] The centrifugal control assembly 002 includes a movable valve body 501, which is fixedly disposed on the inner wall of the transmission cavity 102 at the end away from the screw head 100. A guide valve 500 is slidably disposed in the middle of the movable valve body 501, and a connecting column 506 is installed in the middle of the guide valve 500 on the side near the counterweight 400. An arc-shaped push block 508 is installed on the side of the connecting column 506 away from the guide valve 500.

[0035] A limiting guide post 402 is fixedly installed in the middle of the guide frame 401, and a sliding bracket 404 is slidably disposed outside the limiting guide post 402, with the limiting guide post 402 located inside the support spring 403.

[0036] Two sets of stabilizing guide rods 405 are installed on the inner side of the sliding bracket 404, and the stabilizing guide rods 405 are slidably disposed on the inner side of the guide frame 401 near the counterweight 400.

[0037] Oil injection pipes 502 are installed at the top and bottom of the movable valve body 501. The lower oil injection pipe 502 is fixedly connected to the transmission cavity 102. A valve body channel 507 is opened in the middle of the pilot valve 500.

[0038] Two sets of stabilizing rods 505 are fixedly installed on the side of the arc-shaped push block 508 near the movable valve body 501, and a movable disc 504 is installed on the end of the stabilizing rod 505 away from the arc-shaped push block 508. The movable disc 504 is slidably disposed in the movable cavity inside the movable valve body 501, and a return spring 503 is provided on the side of the movable disc 504 away from the stabilizing rod 505.

[0039] By adopting the above technical solution, the transmission cavity 102 can provide constraints on the inner structure. The rotational kinetic energy of the drive shaft 106 can be transmitted through the transmission shaft 302. The balance bar 304 is used to provide an installation position for the guide frame 401. The guide frame 401 can be used to stably slide the sliding bracket 404 for inner sliding adjustment. The inner limiting guide post 402 and stabilizing guide rod 405 can further increase the sliding stability of the sliding bracket 404. The counterweight 400 at the end of the sliding bracket 404 has a certain weight. When the transmission shaft 302 rotates at high speed, it drives the counterweight 400 to rotate synchronously. Since the counterweight 400 is in a non-fixed state, it gradually moves outward under the action of centrifugal force, compressing the support spring 403 and the movable valve body 5. 01 provides an installation position for the inner structure. Lubricating oil can be added into the transmission cavity 102 through the channel inside the oil injection pipe 502. During the stay of the pilot valve 500, the valve body channel 507 overlaps with the through hole in the middle of the oil injection pipe 502 to introduce lubricating oil into the transmission cavity 102. The arc-shaped push block 508 and the pilot valve 500 can be connected by the connecting column 506. By using the cooperation of the stabilizer 505 and the movable plate 504, the arc-shaped push block 508 can be kept to move stably along the inner channel to adjust the position of the pilot valve 500. The return spring 503 can push the pilot valve 500 to reset when the counterweight 400 is not in contact with the arc-shaped push block 508, ensuring that the pilot valve 500 can be adjusted and reset normally.

[0040] Reference Figure 2 , Figure 5 and Figure 6 The screw head 100 shown is equipped with mounting platforms 103 at its top and bottom, and a dustproof component 001 is spliced ​​on the side of the mounting platform 103 away from the screw head 100.

[0041] The dustproof component 001 includes a sealing disc 201, and combination bolts 202 are embedded in the inner side of the four corners of the sealing disc 201. The combination bolts 202 are movably embedded in the inner side of the mounting platform 103. A connecting pipe 200 is installed on the inner side of the sealing disc 201, and a fixing ring 203 is installed on the side of the connecting pipe 200 near the mounting platform 103. A limit rod 204 is installed on the inner side of the fixing ring 203, and two sets of push rods 205 are installed at the bottom of the limit rod 204.

[0042] The inner wall of the mounting platform 103 is provided with eight sets of limiting slide grooves 104, and the inner side of the limiting slide grooves 104 is provided with limiting slide pins 207. A movable ring 206 is installed in the middle of the limiting slide pins 207, and two sets of torsion spring shafts 209 are embedded in the inner side of the movable ring 206. A set of flip-top sealing cover 210 is installed between the two sets of torsion spring shafts 209. The push rod 205 is movably disposed on one side of the flip-top sealing cover 210. A retaining ring 208 is installed on one side inside the movable ring 206, and the retaining ring 208 is located inside the push rod 205. A fixing spring 211 is provided between the bottom of the movable ring 206 and the mounting platform 103.

[0043] By adopting the above technical solution, the mounting platform 103 can provide an installation position for the dustproof component 001, and the sealing disc 201 can be fixed to the mounting platform 103 using the combination bolts 202. After installation, the sealing between the mounting platform 103 and the sealing disc 201 can be guaranteed, avoiding gas leakage. The fixing ring 203 provides an installation position for the limiting rod 204 and the push rod 205. The push rod 205 can push the flip-up sealing cover 210 for adjustment during installation, and the limiting rod 204 can ensure the stability of the push rod 205. At the same time, the push rod 205 is divided into long and short push rods. The long push rod 205 can achieve the adjustment effect. The end push rod 205, together with the long push rod 205, can limit the flip-up sealing cover 210 when it is flipped 90 degrees, preventing reset from affecting the gas inlet and outlet. The movable ring 206 can limit the sliding column 207. The vertical sliding adjustment along the inner side of the limiting slide groove 104 under the restriction achieves the effect of auxiliary splicing. The limiting slide groove 104 of the mounting platform 103 can restrict the limiting slide column 207 of the inner sliding adjustment, which can ensure the stability of the sliding of the movable ring 206. The torsion spring shaft 209 on the inner side of the movable ring 206 is a combination structure of torsion spring and rotating shaft, which can provide the force for the flip-up closing cover 210 to flip and reset. Without the push rod 205 pushing, the flip-up closing cover 210 will automatically reset to contact the retaining ring 208 to achieve the effect of sealing the middle area of ​​the mounting platform 103. This can block dust and debris from entering the interior to a certain extent and avoid the problem of squeezing deformation and damage caused by getting stuck on the inner side of the meshing screw 107. The fixing spring 211 can push the movable ring 206 to reset along the inner side of the mounting platform 103 when the connecting pipe 200 is disassembled.

[0044] Reference Figure 1 , Figure 2 and Figure 6 As shown, a limiting shaft cover 101 is installed on the other side of the screw head 100, and a water-cooling cavity 105 is opened on the inner wall of the screw head 100. The water-cooling cavity 105 is equipped with a connection port. A drive shaft 106 is rotatably mounted on the inner side of the limiting shaft cover 101 through a bearing. The drive shaft 106 is fixedly connected to the transmission shaft 302. A meshing screw 107 is fixedly mounted on the outer side of the transmission shaft 302 near the end of the screw head 100. The meshing screw 107 is rotatably mounted inside the screw head 100. A sealing plate 108 is installed on the side of the transmission cavity 102 away from the screw head 100. A combination cover 109 is bolted to the side of the sealing plate 108 away from the screw head 100. An oil drain pipe 110 is installed at the bottom of the transmission cavity 102.

[0045] A meshing gear 300 is spliced ​​and fixedly installed on the outer side of the drive shaft 302, and a bearing isolator 301 is installed in the middle of the drive shaft 302. The bearing isolator 301 is assembled and arranged on the inner side of the drive cavity 102 near the end of the screw head 100. A locking nut 303 is installed on the side of the meshing gear 300 away from the bearing isolator 301.

[0046] By adopting the above technical solution, the drive shaft 106 and the screw head 100 can be connected by the limiting shaft cover 101. After connection, the stability of the high-speed rotation of the drive shaft 106 can be ensured. Cooling water can be injected into the water cooling cavity 105 to cool the cavity of the screw head 100 and avoid the problem of high temperature deformation. The drive shaft 106 can drive the transmission shaft 302 to rotate synchronously. During the rotation, the two sets of meshing screws 107 will mesh and rotate, drawing gas into the interior and compressing it during rotation before it is discharged from the bottom pipe. The end can be sealed and welded to the transmission cavity 102 using the sealing plate 108. After the end is bolted and the combination cover 109 is installed, it can be easily disassembled for simple internal maintenance. The oil drain pipe 110 at the bottom can drain the internal oil for circulation and cooling. When the meshing gear 300 rotates, it can ensure that the two sets of transmission shafts 302 can rotate synchronously. The bearing isolator 301 can assist the transmission shaft 302 to rotate and ensure sealing. The locking nut 303 is used to increase the stability of the meshing gear 300 installation through combination installation.

[0047] The implementation principle of this application embodiment is as follows: During use, the device is connected to an external device. A motor drives the drive shaft 106 to rotate. During rotation, the meshing gear 300 on the transmission shaft 302 meshes and drives another set of transmission shafts 302 to rotate synchronously. During synchronous rotation, the two sets of meshing screws 107 will mesh and rotate synchronously. External gas enters the interior through the upper connecting pipe 200, is compressed by the screw head 100, and is discharged through the bottom connecting pipe 200.

[0048] During the high-speed rotation of the drive shaft 302, the centrifugal force of the counterweight 400 gradually exceeds that of the support spring 403. The counterweight 400 will pull the sliding bracket 404 to slide laterally along the guide frame 401. During the sliding process, the counterweight 400 will gradually contact the arc-shaped push block 508. After the arc-shaped counterweight 400 contacts the arc surface of the arc-shaped push block 508, it will push the arc-shaped push block 508 to move towards the movable valve body 501. During the movement, the connecting column 506 will push the guide valve 500 to slide stably along the inner side of the movable valve body 501. During the sliding adjustment process, the overlap area between the valve body channel 507 and the pipe hole in the oil injection pipe 502 will change, thereby increasing the amount of lubricating oil injected.

[0049] When disassembly and maintenance are required, tools are needed to remove the combination bolts 202. After disassembly, the connecting pipe 200 is gripped and lifted. During the lifting process, the compressed fixing spring 211 pushes the movable ring 206 to reset under the elastic action. During the reset process, the limiting slide column 207 will stably adjust along the limiting slide groove 104. During the rising process, the push rod 205 separates from the flip-top cover 210. After separation, the torsion spring of the torsion spring shaft 209 will push the flip-top cover 210 to flip and reset along the torsion spring shaft 209. During the reset process, the retaining ring 208 will block the flip-top cover 210. After removal, maintenance can be performed.

[0050] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screw compressor head, comprising a screw compressor head (100), characterized in that: A transmission cavity (102) is fixedly installed on one side of the screw head (100), and a centrifugal control component (002) is provided on the inner side of the end of the transmission cavity (102) away from the screw head (100). The centrifugal control assembly (002) includes two sets of drive shafts (302), and the drive shafts (302) are rotatably disposed inside the transmission cavity (102). One set of drive shafts (302) has a balance bar (304) welded to both sides of the end away from the screw head (100), and a guide frame (401) is welded to the side of the balance bar (304) away from the screw head (100). A sliding bracket (404) is slidably disposed on the inner side of the guide frame (401). A support spring (403) is disposed on the front side of the sliding bracket (404) and the inner side of the guide frame (401). A counterweight (400) is mounted on the front side of the sliding bracket (404). The centrifugal control assembly (002) includes a movable valve body (501), which is fixedly disposed on the inner wall of the transmission cavity (102) away from the screw head (100). A guide valve (500) is slidably disposed in the middle of the movable valve body (501), and a connecting column (506) is installed in the middle of the guide valve (500) near the counterweight (400). An arc-shaped push block (508) is installed on the side of the connecting column (506) away from the guide valve (500).

2. The screw compressor head according to claim 1, characterized in that: A limiting guide post (402) is fixedly installed in the middle of the guide frame (401), and the sliding bracket (404) is slidably disposed outside the limiting guide post (402), and the limiting guide post (402) is located inside the support spring (403).

3. A screw compressor head according to claim 2, characterized in that: Two sets of stabilizing guide rods (405) are installed on the inner side of the sliding bracket (404), and the stabilizing guide rods (405) are slidably disposed on the inner side of the guide frame (401) near the counterweight (400).

4. A screw compressor head according to claim 1, characterized in that: The top and bottom of the movable valve body (501) are equipped with oil injection pipes (502), and the lower end of the oil injection pipe (502) is fixedly connected to the transmission cavity (102). The middle part of the guide valve (500) is provided with a valve body channel (507).

5. A screw compressor head according to claim 1, characterized in that: Two sets of stabilizing rods (505) are fixedly installed on the side of the arc-shaped push block (508) near the movable valve body (501), and a movable disc (504) is installed on the end of the stabilizing rod (505) away from the arc-shaped push block (508). The movable disc (504) is slidably disposed in the movable cavity inside the movable valve body (501), and a return spring (503) is provided on the side of the movable disc (504) away from the stabilizing rod (505).

6. A screw compressor head according to claim 1, characterized in that: The top and bottom of the screw head (100) are equipped with mounting platforms (103), and a dustproof component (001) is spliced ​​on the side of the mounting platform (103) away from the screw head (100).

7. A screw compressor head according to claim 6, characterized in that: The dustproof component (001) includes a sealing disc (201), and a combination bolt (202) is embedded in the inner side of the four corners of the sealing disc (201). The combination bolt (202) is movably embedded in the inner side of the mounting platform (103). A connecting pipe (200) is installed on the inner side of the sealing disc (201), and a fixing ring (203) is installed on the side of the connecting pipe (200) near the mounting platform (103). A limit rod (204) is installed on the inner side of the fixing ring (203), and two sets of push rods (205) are installed at the bottom of the limit rod (204).

8. A screw compressor head according to claim 7, characterized in that: The inner wall of the mounting platform (103) is provided with eight sets of limiting slide grooves (104), and a limiting slide post (207) is slidably provided on the inner side of the limiting slide groove (104). A movable ring (206) is installed in the middle of the limiting slide post (207), and two sets of torsion spring shafts (209) are embedded in the inner side of the movable ring (206). A set of flip-top sealing cover (210) is installed between the two sets of torsion spring shafts (209). The push rod (205) is movably disposed on one side of the flip-top sealing cover (210). A retaining ring (208) is installed on one side inside the movable ring (206), and the retaining ring (208) is located inside the push rod (205). A fixing spring (211) is provided between the bottom of the movable ring (206) and the mounting platform (103).

9. A screw compressor head according to claim 1, characterized in that: On the other side of the screw head (100), a limiting shaft cover (101) is installed, and a water-cooling cavity (105) is opened on the inner wall of the screw head (100). The water-cooling cavity (105) is equipped with a connection port. A drive shaft (106) is rotatably arranged on the inner side of the limiting shaft cover (101) through a bearing. The drive shaft (106) is fixedly connected to the transmission shaft (302). A meshing screw (107) is fixedly installed on the outer side of the transmission shaft (302) near the end of the screw head (100). The meshing screw (107) is rotatably arranged inside the screw head (100). A sealing plate (108) is installed on the side of the transmission cavity (102) away from the screw head (100). A combination cover (109) is installed on the side of the sealing plate (108) away from the screw head (100) by bolts. An oil drain pipe (110) is installed at the bottom of the transmission cavity (102).

10. A screw compressor head according to claim 1, characterized in that: A meshing gear (300) is spliced ​​and fixedly installed on the outer side of the drive shaft (302), and a bearing isolator (301) is installed in the middle of the drive shaft (302). The bearing isolator (301) is assembled and arranged on the inner side of the drive cavity (102) near the end of the screw head (100). A locking nut (303) is installed on the side of the meshing gear (300) away from the bearing isolator (301).

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