Semi-closed screw compressor capable of manually adjusting internal volume ratio and energy
By adopting a mechanism for manually adjusting the internal volume ratio and energy in a semi-hermetic screw compressor, the problems of low reliability, low precision and high cost of hydraulic drive in the existing technology are solved, and a screw compressor design with simple structure, easy operation and low cost is achieved.
Patent Information
- Application Number
- CN202422972093.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The Vi adjustment and energy regulation of existing screw compressors are hydraulically driven, resulting in low reliability, low precision and high cost.
A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy is adopted. By arranging a motor, a housing, a rotor, a Vi adjustment mechanism and an energy adjustment mechanism that match each other, including a Vi adjustment slide valve, a Vi adjustment rod, an energy adjustment slide valve and an energy adjustment handwheel, manual adjustment of the internal volume ratio and energy regulation is achieved, avoiding hydraulic drive.
The invention realizes simple structure, convenient operation, reduces device cost, improves reliability and precision, and avoids problems of seal wear and oil leakage.
Smart Images
Figure CN223424224U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical equipment, in particular to a semi-enclosed screw compressor with manually adjustable internal volume ratio and energy. Background Art
[0002] Screw compressors achieve compression by changing the volume of the medium through the interlocking rotation of the male and female rotors. To adapt to varying operating requirements, screw compressors typically incorporate both Vi adjustment and energy regulation. Vi adjustment is used to adapt to varying operating conditions (evaporation and condensation), while energy regulation is used to provide the required cooling capacity. Vi adjustment typically utilizes a Vi adjustment slide valve, which features a radial exhaust port. As the slide moves back and forth, the exhaust port size changes simultaneously, adjusting the internal volume ratio.
[0003] Currently, most screw compressors use slide valves for both Vi and energy regulation, but their operation is hydraulically driven, or a combination of hydraulics and springs. This results in low reliability: hydraulic regulation requires a sealed structure, and seal failure, leading to oil leakage and loss of regulation function, is common. Precision is low: slide valve movement is achieved through the oil pressure differential on both sides of the oil piston, resulting in relatively low precision due to issues such as oil supply and leakage. Hydraulic regulation also has a complex structure, numerous parts, and requires high precision machining. For example, the sealing surface and the inner wall of the oil cylinder must also be highly precise, resulting in relatively low manufacturability and high cost. Utility Model Content
[0004] The utility model provides a semi-hermetic screw compressor with manually adjustable internal volume ratio and energy, which solves the problems of low reliability, low precision and high cost in the internal volume ratio adjustment and energy adjustment of existing semi-hermetic screw compressors due to the use of a hydraulically driven adjustment method.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy, comprising a motor, a housing, a rotor, a Vi adjustment mechanism, and an energy adjustment mechanism; the motor, the rotor, the Vi adjustment mechanism, and the energy adjustment mechanism are arranged in the housing; the Vi adjustment mechanism and the energy adjustment mechanism are installed in coordination with each other;
[0007] The Vi adjustment mechanism consists of a Vi adjustment slide valve, a Vi adjustment rod and a Vi adjustment end; the energy adjustment mechanism consists of an energy adjustment slide valve, an energy adjustment rod and an energy adjustment handwheel;
[0008] One end of the Vi adjusting rod is connected to the bottom of the Vi adjusting slide valve; the other end of the Vi adjusting rod passes through the energy adjusting slide valve and the external shell in sequence; the top of the Vi adjusting rod outside the shell is provided with a Vi adjusting end portion; one end of the energy adjusting rod is connected to the energy adjusting slide valve; the other end of the energy adjusting rod passes through the top of the shell and is connected to the energy adjusting handwheel.
[0009] Furthermore, the Vi adjustment rod is sealedly connected to the shell at the penetration point; and a nut is provided at the Vi adjustment end.
[0010] Furthermore, a thread is provided at the connecting end of the Vi regulating rod and the Vi regulating slide valve; a threaded hole is provided inside the Vi regulating slide valve and is engaged with the thread on the Vi regulating rod.
[0011] Furthermore, the connecting end of the energy regulating rod and the energy regulating slide valve is provided with a thread; the top side of the energy regulating slide valve is provided with a threaded hole, and the bottom is provided with holes running through it to the left and right.
[0012] Furthermore, the threaded hole on the energy regulating slide valve is engaged with the thread on one end of the energy regulating rod; the Vi regulating rod passes through the hole at the bottom of the energy regulating slide valve.
[0013] The beneficial effects of the present invention are:
[0014] The semi-enclosed screw compressor with manually adjustable internal volume ratio and energy provided by the utility model is connected by setting a Vi adjustment mechanism and an energy adjustment mechanism to match each other. The energy adjustment slide valve is driven to move to the right by manually turning the energy adjustment handwheel, so that the bypass port set inside the shell is opened, and part of the gas flows out through the bypass port and returns to the air intake port, thereby realizing energy unloading. The energy adjustment slide valve moves to the left, and the bypass port is reduced to realize load increase. When the energy adjustment slide valve and the Vi adjustment slide valve are in contact, the bypass port is closed, and the compressor is fully loaded. The utility model has a simple structure and is easy to operate. The use of trapezoidal threads makes the structural parts not easy to wear, which greatly reduces the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0016] Figure 1 This is a cross-sectional view of the utility model.
[0017] Figure 2 It is an enlarged cross-sectional view of the Vi adjustment mechanism and energy adjustment mechanism of the utility model.
[0018] Figure 3 It is an enlarged cross-sectional view of the Vi adjustment mechanism and energy adjustment mechanism of the utility model.
[0019] Figure 4 Schematic diagram of the existing Vi adjustment principle.
[0020] Figure 5 Schematic diagram of existing energy regulation principle.
[0021] Figure 6 This is a control diagram of existing Vi regulation and energy regulation.
[0022] Figure 7 This is a schematic diagram of the structure of an existing semi-hermetic screw compressor.
[0023] Description of Figure Numbers:
[0024] 1. Motor; 2. Housing; 3. Rotor; 4. Vi adjustment slide valve; 5. Bypass port; 6. Vi adjustment rod; 7. Energy adjustment slide valve; 8. Energy adjustment rod; 9. Vi adjustment end; 10. Energy adjustment handwheel. DETAILED DESCRIPTION
[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.
[0029] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.
[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0031] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.
[0032] The utility model provides a technical solution: a semi-hermetic screw compressor with manually adjustable internal volume ratio and energy, such as Figures 1-7 As shown, it includes a motor 1, a housing 2, a rotor 3, a Vi adjustment mechanism and an energy adjustment mechanism; the motor 1, the rotor 3, the Vi adjustment mechanism and the energy adjustment mechanism are arranged in the housing 2; the Vi adjustment mechanism and the energy adjustment mechanism are installed in coordination with each other;
[0033] The Vi adjustment mechanism is composed of a Vi adjustment slide valve 4, a Vi adjustment rod 6 and a Vi adjustment end 9; the energy adjustment mechanism is composed of an energy adjustment slide valve 7, an energy adjustment rod 8 and an energy adjustment handwheel 10;
[0034] One end of the Vi adjusting rod 6 is connected to the bottom of the Vi adjusting slide valve 4; the other end of the Vi adjusting rod 6 passes through the energy adjusting slide valve 7 and the external shell 2 in sequence; the top of the Vi adjusting rod 6 outside the shell 2 is provided with a Vi adjusting end 9; one end of the energy adjusting rod 8 is connected to the energy adjusting slide valve 7; the other end of the energy adjusting rod 8 passes through the top of the shell 2 and is connected to the energy adjusting handwheel 10.
[0035] The Vi adjusting rod 6 is sealedly connected to the housing 2 at the penetration point; the Vi adjusting end 9 is provided with a nut; a trapezoidal spiral is provided between the Vi adjusting rod 6 and the Vi adjusting slide valve 4, and the nut of the Vi adjusting end 9 is rotated with a wrench to achieve the left and right movement of the Vi adjusting slide valve 4; the adjustment range of the Vi adjusting slide valve 4 is limited by the length of the thread.
[0036] The connecting end of the Vi regulating rod 6 and the Vi regulating slide valve 4 is provided with a thread; the interior of the Vi regulating slide valve 4 is provided with a threaded hole which is engaged with the thread on the Vi regulating rod 6 .
[0037] The connecting end of the energy regulating rod 8 and the energy regulating slide valve 7 is provided with a thread; the top side of the energy regulating slide valve 7 is provided with a threaded hole, and the bottom is provided with holes running through it to the left and right.
[0038] The threaded hole on the energy regulating slide valve 7 is engaged with the thread on one end of the energy regulating rod 8; the Vi regulating rod 6 passes through the hole at the bottom of the energy regulating slide valve 7.
[0039] The manually rotating energy regulating hand wheel 10 drives the energy regulating slide valve 7 to move to the right. At this time, the size of the opening A between the energy regulating slide valve 7 and the Vi regulating slide valve 4 changes to adjust the energy; the bypass port 5 set inside the shell 2 is opened, and part of the gas flows out through the bypass port 5 back to the intake port, thereby realizing energy unloading. The energy regulating slide valve 7 moves to the left, the bypass port is reduced, and load is increased. When the energy regulating slide valve 7 and the Vi regulating slide valve 7 are in contact, the bypass port 5 is closed, and it is fully loaded at this time.
[0040] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and inventive concept of the present application, can make equivalent substitutions or changes within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application.
Claims
1. A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy, comprising a motor (1), a housing (2) and a rotor (3), characterized in that: It also includes a Vi regulating mechanism and an energy regulating mechanism; the housing (2) is provided with a motor (1), a rotor (3), a Vi regulating mechanism and an energy regulating mechanism; the Vi regulating mechanism and the energy regulating mechanism are installed in coordination with each other; The Vi regulating mechanism is composed of a Vi regulating slide valve (4), a Vi regulating rod (6) and a Vi regulating end portion (9); the energy regulating mechanism is composed of an energy regulating slide valve (7), an energy regulating rod (8) and an energy regulating hand wheel (10); One end of the Vi regulating rod (6) is connected to the bottom of the Vi regulating slide valve (4); the other end of the Vi regulating rod (6) sequentially passes through the energy regulating slide valve (7) and the external housing (2); the top end of the Vi regulating rod (6) outside the housing (2) is provided with a Vi regulating end portion (9); one end of the energy regulating rod (8) is connected to the energy regulating slide valve (7); the other end of the energy regulating rod (8) passes through the top end of the housing (2) and is connected to the energy regulating hand wheel (10).
2. A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy according to claim 1, characterized in that: The Vi adjusting rod (6) and the housing (2) are in sealed connection at the penetration point; the Vi adjusting end (9) is provided with a nut.
3. A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy according to claim 1, characterized in that: The connection end between the Vi regulating rod (6) and the Vi regulating slide valve (4) is provided with a thread; the interior of the Vi regulating slide valve (4) is provided with a threaded hole which is engaged with the thread on the Vi regulating rod (6).
4. A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy according to claim 1, characterized in that: The connecting end of the energy regulating rod (8) and the energy regulating slide valve (7) is provided with a thread; the top side of the energy regulating slide valve (7) is provided with a threaded hole, and the bottom is provided with holes penetrating left and right.
5. A semi-hermetic screw compressor with manually adjustable internal volume ratio and energy according to claim 4, characterized in that: The threaded hole on the energy regulating slide valve (7) is engaged with the thread on one end of the energy regulating rod (8); the Vi regulating rod (6) passes through the hole at the bottom of the energy regulating slide valve (7).