Peristaltic compressor or vacuum pump

Abstract

The utility model relates to a peristaltic compressor or a vacuum pump, in particular to a mechanism which is similar to a traditional rotary compressor in working form, is of a brand new structure and can be used as the compressor or the vacuum pump. A peristaltic rotor is arranged in a hollow shell body, the peristaltic rotor continuously keeps rolling contact with the inner edge of the shell body to form a completely-closed compression chamber, various working fluids can be compressed or conveyed through space changes formed during operation of the peristaltic rotor and the shell body, and high-pressure output can be achieved at a low operation speed. Or a vacuum pump with a high vacuum degree is obtained. The problem that a traditional rotary eccentric wheel and a shell body must be spaced and cannot be applied to a full-dry oil-free compressor or a vacuum pump is solved, and the effects of greatly improving the operation efficiency and the energy-saving effect and reducing the manufacturing difficulty are achieved.

Description

Technical Field

[0001] This utility model is a peristaltic compressor or vacuum pump, especially a mechanism that drives a peristaltic rotor by a motor, and can be used as a compressor or vacuum pump. Background Technology

[0002] Please refer to Figure 1 This is a cross-sectional schematic diagram of a traditional rotary compressor. The traditional rotary compressor mainly has an eccentric wheel 2 inside the compressor housing 1. The center of the eccentric wheel 2 is eccentric to the center of the housing 1. When the eccentric wheel 2 rotates, it can compress the fluid. A high and low pressure partition plate 3 is installed above the eccentric wheel 2 to separate the low pressure fluid 4 from the high pressure fluid 5. The high and low pressure partition plate 3 is forced to maintain contact with the eccentric wheel 2 by the pressure of the spring 6.

[0003] Please refer to Figure 2 This diagram illustrates the compression cycle of a traditional rotary compressor. Point A is the observation point on the outer casing 1, and point B is the observation point on the eccentric wheel 2. Initially, observation points A and B coincide. Each time the eccentric wheel 2 completes one compression cycle clockwise, observation point B on the eccentric wheel rotates one full revolution and returns to the state of coinciding with observation point A.

[0004] The above structure actually has the following drawbacks:

[0005] (1) In a traditional rotary compressor, the eccentric wheel 2 rotates around the main shaft and needs to maintain a very small gap 7 between itself and the outer casing 1 to avoid direct friction between the eccentric wheel 2 and the outer casing 1. This requires high machining precision. If the gap 7 between the eccentric wheel 2 and the outer casing 1 is too large, it will cause a sharp increase in internal leakage, resulting in the inability to increase fluid pressure. If the gap is too small, the eccentric wheel 2 will rub against the outer casing 1, generating noise and high heat, and may even jam and damage the machine.

[0006] (2) For each compression cycle completed by a traditional rotary compressor, the eccentric wheel 2 needs to rotate once. When high pressure fluid is required, the number of rotations required by the eccentric wheel 2 per minute is quite large, and the centrifugal force generated is also large. This not only makes the compressor easy to shake, but also requires special counterweights for the compressor body to continue to operate.

[0007] (3) The working fluid of a traditional rotary compressor is usually a liquid medium mixed with a suitable amount of lubricating oil. The liquid medium can fill the gap 7 between the eccentric wheel 2 and the outer casing 1, while the lubricating oil can prevent lubrication when the gap 7 is slightly insufficient. Therefore, traditional rotary compressors cannot be applied to oil-free dry air compressors and vacuum pump systems.

[0008] (4) When a traditional rotary compressor is running, the eccentric wheel 2 and the high and low pressure partition plate 3 are in constant contact and friction, which easily causes the compressor to heat up and generate energy loss.

[0009] (5) In traditional rotary compressors, there is a gap 7 between the eccentric wheel 2 and the outer casing 1, so the high-pressure fluid 5 and the low-pressure fluid 4 are actually directly connected, and therefore the fluid pressure cannot be increased at low speed.

[0010] (6) In a traditional rotary compressor, the high and low pressure separation plate 3 is forced to maintain contact with the eccentric wheel 2 by the pressure of the spring 6. However, when the eccentric wheel 2 rotates at high speed, the high and low pressure separation plate 3 will not be able to reset in time, resulting in a gap, which causes internal leakage and reduces operating efficiency. Utility Model Content

[0011] This utility model aims to overcome the shortcomings of the aforementioned traditional technology. Its main technical objective is to design a mechanism that maintains continuous contact between a peristaltic rotor and the inner edge of the outer casing. Through the spatial changes created during their operation, it serves as a novel, high-efficiency, energy-saving compressor and vacuum pump for compressing and transporting various fluids. The main components include covering the surface of the peristaltic rotor with a high-temperature resistant and wear-resistant composite material with appropriate elasticity. A bearing is located at the center of the peristaltic rotor, through which an eccentric camshaft passes and is assembled into the outer casing. This ensures that the surface of the assembled peristaltic rotor directly contacts the inner edge of the outer casing with appropriate contact pressure. Furthermore, rollers are located below the high and low pressure partition plates, and a pneumatic cylinder and spring force the high and low pressure partition plates to maintain continuous contact with the roller surfaces with appropriate contact pressure.

[0012] According to the purpose of this utility model, a peristaltic compressor or vacuum pump is provided, comprising: a housing body; a peristaltic rotor assembled within the housing body, the peristaltic rotor being composed of an eccentric camshaft and a roller, the surface of the roller being covered with a coating layer, the eccentric camshaft passing through the roller, such that the roller is assembled on the eccentric camshaft; a high and low pressure separation mechanism assembled above the peristaltic rotor; a rear cover, a front cover, and an upper cover respectively assembled outside the housing body; the surface of the peristaltic rotor is directly attached to the inner edge of the housing body and has appropriate contact pressure, thereby forming a mechanism with excellent airtightness.

[0013] In some exemplary embodiments, a bearing is provided between the eccentric camshaft and the rollers, with the eccentric camshaft passing through the bearing so that the roller assembly is mounted on the eccentric camshaft.

[0014] In some exemplary embodiments, the eccentric cam on the eccentric camshaft has an equilateral trapezoidal shape with edges thinner than the center, reducing the contact area between the eccentric cam and the inner edge of the bearing.

[0015] In some exemplary embodiments, the rollers of the peristaltic rotor include a roller frame and an inner roller frame. The inner roller frame can be embedded in the roller frame. At least one bearing is disposed at the center of the inner roller frame. The eccentric camshaft passes through the bearing, so that the roller assembly is disposed on the eccentric camshaft.

[0016] In some exemplary embodiments, the coating material on the roller surface is a Teflon composite material or a silicone rubber composite material.

[0017] In some exemplary embodiments, the high-low pressure separation mechanism includes: a high-low pressure separation plate; a plurality of guide pillars locked above the high-low pressure separation plate; a top cover having a plurality of through holes through which the plurality of guide pillars pass; a guide pillar seat locked above the plurality of guide pillars; and a pneumatic cylinder assembled above the top cover, the pneumatic cylinder pressing against the guide pillar seat and providing a constant output force through a pressure regulating valve, so that the high-low pressure separation plate can directly contact the roller surface of the peristaltic rotor, and the contact pressure between the high-low pressure separation plate and the peristaltic rotor is not affected by changes in position, thereby achieving the function of separating high-low pressure zones.

[0018] In some exemplary embodiments, a roller is provided below the high and low pressure separator, so that the high and low pressure separator and the surface of the peristaltic rotor are in rolling contact.

[0019] In some exemplary embodiments, it further includes: at least two springs, each mounted on a spring guide rod, the two spring guide rods being locked to guide posts on both sides.

[0020] The peristaltic rotor of this invention moves in a fixed direction by oscillating motion, while simultaneously rotating slowly in the opposite direction. This is the origin of the name peristaltic compressor or vacuum pump.

[0021] This invention forms a completely sealed fluid compression chamber by continuously rolling the surface of the peristaltic rotor in contact with the inner edge of the outer shell. High pressure output can be achieved at low operating speed. It also solves the problem that traditional rotary eccentric wheels must maintain a distance from the outer shell, making them unsuitable for use in fully dry oil-free compressors or vacuum pumps. This significantly improves operating efficiency and energy saving, while reducing manufacturing difficulty. Attached Figure Description

[0022] Figure 1 This is a cross-sectional diagram of traditional technology.

[0023] Figure 2 This is a schematic diagram of the compression cycle of a traditional rotary compressor.

[0024] Figure 3 This is an exploded perspective view of the present invention.

[0025] Figure 4 This is a three-dimensional view of the combined utility model.

[0026] Figure 5 This is a side sectional view of the present invention.

[0027] Figure 6 This is a front sectional view of the present invention.

[0028] Figure 7a This is a schematic diagram of the structure of a traditional eccentric camshaft;

[0029] Figure 7b This is a schematic diagram of the improved eccentric camshaft of this utility model;

[0030] Figure 8 This is a schematic diagram of the compression cycle action of this utility model.

[0031] Explanation of reference numerals in the attached figures

[0032] Traditional technology

[0033] 1. Outer shell

[0034] 2 eccentric wheels

[0035] 3 High and low pressure partitions

[0036] 4 Low-pressure fluid

[0037] 5 High-pressure fluid

[0038] 6 springs

[0039] 7 gaps

[0040] A Observation Point

[0041] B Observation point

[0042] This utility model

[0043] 10. Outer shell body

[0044] 11 after sealing

[0045] 12 front cap

[0046] 13 top cover

[0047] 130 perforation

[0048] 20 peristaltic rotors

[0049] 21 Eccentric Camshaft

[0050] 22 rollers

[0051] 23 coating layers

[0052] 24 bearings

[0053] 220 roller frame

[0054] 221 inner rim

[0055] 30 High and Low Pressure Separation Mechanism

[0056] 31 High and Low Pressure Separator

[0057] 32 guide pillars

[0058] 33 guide post seat

[0059] 34 springs

[0060] 35 Spring Guide Rod

[0061] 36 rollers

[0062] 40 pneumatic cylinder

[0063] Observation point C

[0064] Observation point D. Detailed Implementation

[0065] Please see Figures 3 to 8 It is a new type of peristaltic mechanism that can be used as a compressor or vacuum pump. It mainly includes a housing body 10 and a peristaltic rotor 20 assembled inside the housing body 10. The peristaltic rotor 20 is composed of an eccentric camshaft 21 and a roller 22. The surface of the roller 22 is covered with a coating layer 23 with appropriate elasticity, high temperature resistance and wear resistance. The eccentric camshaft 21 passes through the roller 22, so that the roller 22 is assembled on the eccentric camshaft 21.

[0066] A high-low pressure separation mechanism 30 is disposed above the peristaltic rotor 20, and a rear cover 11, a front cover 12, and an upper cover 13 are respectively disposed outside the outer casing 10. The surface of the peristaltic rotor 20 is directly attached to the inner edge of the outer casing 10 and has appropriate contact pressure. That is, the biggest difference between this invention and conventional technology is that the peristaltic rotor 20 of this invention is directly pressed against the inner edge of the outer casing 10 with applied force, and there is no gap between the peristaltic rotor 20 and the inner edge of the outer casing 10. Therefore, it can form a mechanism with excellent airtightness, and airtightness is the key to improving the efficiency of this type of compressor or vacuum pump. Please refer to the following: Figure 1 Traditionally, there must be a gap 7 between the eccentric wheel 2 and the outer shell 1.

[0067] The reason this invention achieves the elimination of gaps is that the outer ring of the roller 22 of the peristaltic rotor 20 is covered with an elastic coating layer 23, unlike conventional technologies where both the outer shell 1 and the eccentric wheel 2 are made of metal. In conventional designs, if the eccentric wheel 2 and the outer shell 1 operate without gaps, the resulting noise and vibration are extremely unacceptable. In this invention, the roller 22 rolls rather than slides when in contact with the outer shell 10; each contact moment is relatively stationary, without relative sliding, thus preventing the generation of significant frictional heat. This is drastically different from the situation in conventional structures where, if the eccentric wheel 2 accidentally comes into contact with the outer shell 1, it generates high heat, noise, and vibration.

[0068] When this invention is applied to large compressors or vacuum pumps, a bearing 24 can be installed between the eccentric camshaft 21 and the roller 22. The eccentric camshaft 21 passes through the bearing 24, allowing the roller 22 to be mounted on the eccentric camshaft 21. The intermediate bearing 24 allows the roller 22 to rotate around the eccentric camshaft 21. Therefore, when the eccentric camshaft 21 rotates clockwise, the roller 22 will rotate counterclockwise, and the rotational speed of the roller 22 in the opposite direction will be much less than the rotational speed of the eccentric camshaft 21. This reduces wear on the outer covering layer 23 of the roller 22 during operation, as well as energy consumption and vibration.

[0069] Since the roller 22 rotates with appropriate contact pressure directly with the inner edge of the outer casing 10, its outer surface needs to be covered with a coating layer 23 to provide an airtight shock absorption effect. This coating layer 23 can be a Teflon composite material or a silicone rubber composite material, possessing appropriate elasticity, high temperature resistance, and wear resistance. After prolonged operation, the coating layer 23 may wear down. In this case, simply remove the roller 22 or roller frame 220, reapply the coating layer, and it can continue to be used, making it quite environmentally friendly and easy to maintain.

[0070] This invention is applicable to compressors or vacuum pumps of various capacities; therefore, the roller 22 of the peristaltic rotor 20 can be integrally formed or composed of multiple parts. Please refer to the following for details. Figure 2 The roller 22 can be composed of a roller frame 220 and an inner frame 221. The inner frame 221 can be embedded in the roller frame 220. At least one bearing 24 is provided at the center of the inner frame 221, and the eccentric camshaft 21 passes through the bearing 24, so that the roller 22 is assembled on the eccentric camshaft 21. In this way, the roller 22 of this utility model can be assembled from multiple parts, which can greatly reduce manufacturing costs, and is especially suitable for medium and large volume compressors or vacuum pumps.

[0071] Figure 7a This is a schematic diagram of a traditional eccentric camshaft. (Example) Figure 7bAs shown, the eccentric cam 211 on the eccentric camshaft is cylindrical and has a large contact area with the bearing 24. The inventors found that during actual operation, the roller 22 is prone to imbalance in contact force with the outer casing 10 due to tolerances in the manufacturing of the eccentric camshaft 21 and minor errors in assembly. As a result, the roller 22 will deviate towards the position of the rear cover 11 or the front cover 12, causing severe wear on one side of the roller 22 and the cover. This not only easily consumes the coating layer 23 on the roller 22, but also requires more energy to rotate the roller 22 due to the greater friction.

[0072] Figure 7b This is a schematic diagram of the improved eccentric camshaft of this utility model. Figure 7b As shown, when the eccentric cam 212 on the eccentric camshaft 21 changes shape to be an equilateral trapezoid with thinner edges than center, the contact area between the eccentric cam 212 and the bearing 24 is reduced, so the contact force between the roller 22 and the housing body 10 can be automatically balanced, so that the roller 22 will not be biased towards the rear cover 11 or the front cover 12, which greatly reduces wear and reduces energy consumption.

[0073] Please refer to this again. Figure 8 This is a schematic diagram of the compression cycle operation of this utility model. Point C in the diagram is the observation point on the outer shell 10, and point D is the observation point on the peristaltic rotor 20. Initially, observation points C and D coincide. When the eccentric camshaft 21 rotates clockwise once, the peristaltic rotor 20 will sway in the same direction to complete one compression cycle. However, since the peristaltic rotor 20 has a bearing 24 at its center, the peristaltic rotor 20 itself will only roll and rotate slightly counterclockwise. Therefore, observation point D will only shift slightly.

[0074] The rotation of the peristaltic rotor 20 can be calculated using the formula "(circumference of the inner edge of the outer shell - circumference of the outer edge of the peristaltic rotor) / circumference of the inner edge of the outer shell". For example, if the circumference of the inner edge of the outer shell 10 is 500 mm and the circumference of the outer edge of the peristaltic rotor 20 is 470 mm, when the eccentric camshaft 21 completes one revolution of compression, the peristaltic rotor 20 only rotates "(500-470) / 500=0.06" revolutions. In terms of angles, when the eccentric camshaft 21 rotates 360 degrees, the peristaltic rotor 20 only rotates 0.06 x 360 = 21.6 degrees. That is, when the eccentric camshaft 21 is driven at a speed of 1500 revolutions per minute (1500 RPM), the peristaltic rotor 20 does complete 1500 compression cycles per minute, but only rotates in the opposite direction 90 revolutions per minute (90 RPM). Moreover, the peristaltic rotor 20 does not rotate in the air but rolls against the inner edge of the outer shell body 10. Therefore, this utility model will not shake violently when operating at high speed.

[0075] Furthermore, this invention also improves upon the problem in traditional technology where the high-low pressure separator 3 fails to reset in time, creating a gap with the eccentric wheel 2, causing internal leakage and thus reducing efficiency. The innovative high-low pressure separation mechanism 30 of this invention mainly comprises: a high-low pressure separator 31; multiple guide pillars 32 locked above the high-low pressure separator 31; a top cover 13 with multiple through holes 130 through which the multiple guide pillars 32 pass; a guide pillar seat 33 locked above the multiple guide pillars 32; and a pneumatic cylinder 40 mounted above the top cover 13. The pneumatic cylinder 40 presses against the guide pillar seat 33 and provides constant output force through a pressure regulating valve, allowing the high-low pressure separator 31 to directly contact the surface of the roller 22 of the peristaltic rotor 20, without affecting the contact pressure between the high-low pressure separator 31 and the roller 22 due to positional changes, thus achieving the function of separating high and low pressure zones.

[0076] To reduce friction between the high-low pressure partition plate 31 and the roller 22, a semi-circular groove can be provided below the high-low pressure partition plate 31, and a roller 36 can be installed in the semi-circular groove. This allows the high-low pressure partition plate 31 to roll and contact the roller 22 surface through the roller 36, significantly reducing the possibility of frictional heat generation. This ensures that no gaps are formed between the high-low pressure partition plate 31 and the roller 22, preventing internal leakage, and also prevents wear on the high-low pressure partition plate 31, thereby improving operating efficiency.

[0077] Furthermore, when this invention is used as a compressor, the air pressure source for the pneumatic cylinder 40 can be either the high-pressure fluid produced by this invention itself or an external air pressure source. If the high-pressure fluid produced by this invention is used as the air pressure source, since sufficient high-pressure fluid is not yet generated for the pneumatic cylinder 40 to operate at the beginning of operation, it may further include: at least two springs 34, respectively mounted on two spring guide rods 35, which are respectively locked to the guide posts 32 on both sides. In this way, at the beginning of operation, the pressure of the reliable springs 34 forces the high and low pressure separator 31 and the roller 22 to have a basic contact pressure; when the operating speed increases and the spring force is insufficient, the reliable pneumatic cylinder 40 continues to press the high and low pressure separator 31 and the roller 22 to maintain continuous contact, and the maximum output of the pneumatic cylinder 40 can be limited by the pressure regulating valve to ensure that the contact force between the roller 36 and the roller 22 is constant and not too high.

[0078] Based on the above structure, the following effects and advantages can be obtained:

[0079] (1) Currently, traditional rotary eccentric wheel compressors on the market require very high manufacturing precision to minimize the gap 7 between the eccentric wheel 2 and the outer casing 1, but without allowing them to touch. This invention takes the opposite approach, pioneering a method where the peristaltic rotor 20 directly contacts the inner edge of the outer casing 10. By installing a bearing 24 in the middle, the peristaltic rotor 20 and the inner edge of the outer casing 10 make rolling contact, eliminating frictional heat and achieving reliable airtightness. This improves compression efficiency without requiring excessive manufacturing precision, thus reducing manufacturing costs and extending service life.

[0080] (2) The peristaltic rotor 20 of this utility model does not slide relative to the inner edge of the outer shell 10, and no friction is generated. The working fluid does not require lubrication. Therefore, it can compress pure gas, pure liquid, or gas-liquid mixture. Thus, it can be used not only as a compressor but also as a vacuum pump. This solves the problem that traditional technology cannot be applied to completely dry oil-free compressors or vacuum pumps, thereby expanding the scope of application.

[0081] (3) When this utility model is in operation, the rotation speed of the peristaltic rotor 20 is much smaller than the rotation speed of the eccentric camshaft 21 driven by the power source, thus achieving the effect of greatly reducing the degree of shaking.

[0082] (4) Because there is no gap between the peristaltic rotor 20 and the inner edge of the outer shell 10, the compressor of this utility model is a fully enclosed space. Therefore, it can output high pressure at low speed or achieve a high vacuum effect, thus saving energy.

[0083] (5) The present invention provides a roller 36 below the high and low pressure partition plate 31. Through the pneumatic cylinder 40 and the spring 34, the roller 36 of the high and low pressure partition plate 31 is forced to maintain continuous rolling contact with the surface of the roller 22, so that no gap will be generated and internal leakage will be caused. This can achieve the effect of increasing pressure quickly and operating more efficiently.

[0084] In conclusion, this utility model has outstanding substantive features and significant progress, while also achieving industrial applicability and advancement. Furthermore, this utility model is not found in any information that can be known to the public, and thus possesses novelty, and therefore complies with the provisions of patent laws and regulations.

[0085] However, the above description is only one of the preferred embodiments of this utility model and should not be used to limit the scope of implementation of this utility model; therefore, all equivalent changes and modifications created in accordance with the claims of this utility model should still fall within the scope of this utility model patent.

Claims

1. A peristaltic compressor or vacuum pump, characterized in that, Include: One outer shell; A peristaltic rotor is assembled inside the outer casing. The peristaltic rotor consists of an eccentric camshaft and a roller. The surface of the roller is covered with a coating layer. The eccentric camshaft passes through the roller, so that the roller is assembled on the eccentric camshaft. A high-low pressure separation mechanism is assembled above the peristaltic rotor, and a rear cover, a front cover, and an upper cover are respectively assembled outside the outer shell. The surface of the peristaltic rotor is directly attached to the inner edge of the outer casing and has appropriate contact pressure, thus forming a mechanism with excellent airtightness.

2. The peristaltic compressor or vacuum pump as described in claim 1, characterized in that: A bearing is provided between the eccentric camshaft and the roller assembly, with the eccentric camshaft passing through the bearing so that the roller assembly is mounted on the eccentric camshaft.

3. The peristaltic compressor or vacuum pump as described in claim 2, characterized in that: The eccentric cam on the eccentric camshaft has an equilateral trapezoidal shape with thinner edges than center, which reduces the contact area between the eccentric cam and the inner edge of the bearing.

4. The peristaltic compressor or vacuum pump as described in claim 3, characterized in that: The peristaltic rotor's rollers include a roller frame and an inner roller frame. The inner roller frame can be embedded in the roller frame. At least one bearing is arranged at the center of the inner roller frame. The eccentric camshaft passes through the bearing, so that the roller assembly is arranged on the eccentric camshaft.

5. The peristaltic compressor or vacuum pump as described in claim 1, characterized in that: The coating material on the surface of the roller is either Teflon composite material or silicone rubber composite material.

6. The peristaltic compressor or vacuum pump as described in claim 2, characterized in that: The coating material on the surface of the roller is either Teflon composite material or silicone rubber composite material.

7. The peristaltic compressor or vacuum pump as described in claim 3, characterized in that: The coating material on the surface of the roller is either Teflon composite material or silicone rubber composite material.

8. The peristaltic compressor or vacuum pump as described in any one of claims 1 to 7, characterized in that, The high-low pressure separation mechanism includes: A high-low pressure partition plate; Multiple support columns are locked above the high and low pressure partition plate; The top cover has multiple perforations, through which the multiple support posts pass respectively; A guide post seat is locked above the plurality of guide posts; A pneumatic cylinder is installed above the top cover. The pneumatic cylinder presses against the guide column seat and provides constant output force through the pressure regulating valve, so that the high and low pressure partition plate can directly contact the roller surface of the peristaltic rotor, and the contact pressure between the high and low pressure partition plate and the peristaltic rotor is not affected by the position change, thus achieving the function of separating the high and low pressure zones.

9. The peristaltic compressor or vacuum pump as described in claim 8, characterized in that: Below the high and low pressure partition plate, a roller is installed so that the high and low pressure partition plate and the surface of the peristaltic rotor are in rolling contact.

10. The peristaltic compressor or vacuum pump as described in claim 9, characterized in that, Further includes: At least two springs are mounted on two spring guide rods, which are respectively locked to guide posts on both sides.

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