Rotary speed reducer and heliostat

Abstract

The utility model discloses a rotary speed reducer and a heliostat. The rotary speed reducer comprises a base, a box body, a worm gear, a worm and an oil seal. The worm gear is mounted on the first side of the base. The worm is meshed with the worm gear; the box body covers the first side of the base, the worm gear and the worm are located in the box body, and the worm is rotationally installed in the box body. And the worm rotates around the worm gear to drive the box body to rotate relative to the base during autorotation. And the oil seal is arranged among the base, the box body and the worm gear. The oil seal is installed in the box body, and the outer side wall of the oil seal is connected with the inner side wall of the box body. The side, facing the base, of the oil seal is provided with a first lip, and the first lip is matched with the first side surface of the base to form a first seal. A second lip and a third lip are arranged on the inner side of the oil seal, the second lip is located between the third lip and the base, a second seal is formed between the second lip and the outer side wall of the worm gear, and a third seal is formed between the third lip and the outer side wall of the worm gear.

Description

Technical Field

[0001] This utility model belongs to the field of solar thermal power generation technology, and in particular relates to a rotary reducer and a heliostat. Background Technology

[0002] Solar energy, as a renewable and inexpensive energy source, is widely used, especially in the field of concentrated solar power (CSP). Among them, tower CSP has attracted much attention due to its unique advantages, such as high heat collection efficiency, high thermal conversion efficiency, high-temperature heat storage capability, and suitability for large-scale application through combined operation.

[0003] As a key component of tower solar thermal power generation, the heliostat's sun-tracking function is achieved through rotation at two angles: elevation and azimuth. The azimuth rotation of the heliostat is typically driven by a rotary reducer. To ensure long-term, high-precision sun-tracking operation in harsh environments, the transmission chamber of the rotary reducer must be sealed.

[0004] Existing rotary reducers typically use conventional oil seals with two sealing lips for sealing. However, in actual use, moisture and a small amount of dust can still enter the reducer housing, resulting in oil leakage and poor sealing performance, which affects the performance of the heliostat. Utility Model Content

[0005] The purpose of this invention is to provide a rotary reducer and a heliostat to solve the problem of poor sealing performance caused by the use of conventional oil seals in existing rotary reducers.

[0006] The technical solution of this utility model is as follows:

[0007] A rotary reducer includes a base, a housing, a worm gear, a worm mechanism, and an oil seal;

[0008] The worm gear is installed on the first side of the base; the worm is meshed with the worm gear; the housing is covered on the first side of the base, and the worm gear and the worm are located inside the housing, with the worm rotatably installed in the housing; when the worm rotates, it rotates around the worm gear to drive the housing to rotate relative to the base;

[0009] The oil seal is installed between the housing and the base, and is sleeved on the worm gear;

[0010] The oil seal is installed inside the housing, and the outer wall of the oil seal is connected to the inner wall of the housing. The oil seal has a first lip on the side facing the base, and the first lip cooperates with the first side surface of the base to form a first seal. The inner side of the oil seal has a second lip and a third lip, and the second lip is located between the third lip and the base. The second lip and the outer wall of the worm gear form a second seal, and the third lip and the outer wall of the worm gear form a third seal.

[0011] In a rotary reducer provided in one embodiment, a fourth lip is provided on the inner side of the oil seal, and a third lip is provided between the fourth lip and the second lip; a fourth seal is formed between the fourth lip and the outer wall of the worm gear.

[0012] In a rotary reducer provided in one embodiment, the second lip is located at the end of the oil seal near the base, and the third and fourth lips are located at the end of the oil seal away from the base.

[0013] In a rotary reducer provided in one embodiment, the first lip is clearance-fitted with the first side surface of the base.

[0014] In a rotary reducer provided in one embodiment, the second lip and the outer wall of the worm gear are transitionally fitted.

[0015] In a rotary reducer provided in one embodiment, the third lip and the outer wall of the worm gear are interference-fitted.

[0016] In a rotary reducer provided in one embodiment, the fourth lip and the outer wall of the worm gear are interference-fitted.

[0017] In a rotary reducer provided in one embodiment, the oil seal is installed inside the housing via an interference fit between the outer wall of the oil seal and the inner wall of the housing.

[0018] In a rotary reducer provided in one embodiment, the oil seal has an annular groove at one end away from the base; the bottom surface of the annular groove is located between the second lip and the third lip along the axial direction of the oil seal.

[0019] A heliostat, wherein the azimuth drive device in the heliostat employs a rotary reducer as described in any of the above claims.

[0020] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0021] The rotary reducer provided by this utility model isolates most of the dust and water through a first seal formed between the first lip and the first side surface of the base; a second end seal formed between the second lip and the outer wall of the worm gear blocks the remaining small amount of dust and moisture; and a third seal formed between the third lip and the outer wall of the worm gear prevents lubricating oil from overflowing from the gearbox. The rotary reducer provided by this utility model effectively solves the problem of poor sealing performance caused by conventional oil seals in existing rotary reducers. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] Figure 1 This is a schematic diagram of a rotary speed reducer;

[0024] Figure 2 This is a cross-sectional schematic diagram of a rotary speed reducer.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1: Base; 2: Housing; 3: Worm gear; 4: Worm; 5: Oil seal; 51: First lip; 52: Second lip; 53: Third lip; 54: Fourth lip; 55: Annular groove; 551: (Annular groove) bottom surface. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0028] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0029] Example 1

[0030] See Figure 1 and Figure 2This embodiment provides a rotary reducer, including a base 1, a housing 2, a worm gear 3, a worm 4, and an oil seal 5.

[0031] The worm gear 3 is mounted on the first side of the base 1. The worm 4 is meshed with the worm gear 3. The housing 2 covers the first side of the base 1, and the worm gear 3 and worm 4 are located inside the housing 2, with the worm 4 rotatably mounted on the housing 2. Therefore, when the worm 4 is driven by the motor to rotate, since the worm 4 is fixedly mounted on the base 1, the worm 4 rotates around the worm gear 3 while rotating, thereby causing the housing 2 to rotate relative to the base 1.

[0032] The first side of the base 1 is the side of the base 1 facing the box 2.

[0033] Since the housing 2 rotates relative to the base 1, a gap is required between the housing 2 and the base 1. Without a sealing structure, external dust and moisture will enter the housing 2 through this gap, and the lubricating oil inside the housing 2 will also leak out through this gap. Therefore, an oil seal 5 is installed.

[0034] The oil seal 5 is installed between the housing 2 and the base 1, and is sleeved on the worm gear 3.

[0035] Oil seal 5 is sleeved on worm gear 3, and oil seal 5 is located between base 1, housing 2 and worm gear 3. Among them, only part of worm gear 3 is provided with threads for meshing with worm 4, and no threads are provided on the outer wall of the end of worm gear 3 near base 1.

[0036] Oil seal 5 is installed inside housing 2, and the outer wall of oil seal 5 is connected to the inner wall of housing 2. Specifically, oil seal 5 can be installed inside housing 2 through an interference fit between the outer wall of oil seal 5 and the inner wall of housing 2.

[0037] The oil seal 5 has a first lip 51 on the side facing the base 1. The first lip 51 mates with the first side surface of the base 1 to form a first seal; the first lip 51 and the first side surface of the base 1 are in clearance fit. The function of the first seal is to isolate most of the dust and water.

[0038] The inner side of the oil seal 5 is provided with a second lip 52 and a third lip 53, and the second lip 52 is located between the third lip 53 and the base 1.

[0039] A second seal is formed between the second lip 52 and the outer wall of the worm gear 3; specifically, the second lip 52 transitions into the outer wall of the worm gear 3. The function of the second seal is to prevent the remaining small amount of dust and moisture from entering the housing 2.

[0040] A third seal is formed between the third lip 53 and the outer wall of the worm gear 3; specifically, the third lip 53 is interference-fitted with the outer wall of the worm gear 3. The function of the third seal is to prevent lubricating oil from overflowing from the housing 2, improve the sealing performance of the rotary reducer, and enable it to achieve long-term high-precision operation.

[0041] Furthermore, to improve sealing performance, a fourth lip 54 can be provided on the inner side of the oil seal 5. A third lip 53 is located between the fourth lip 54 and the second lip 52, forming a fourth seal between the fourth lip 54 and the outer wall of the worm gear 3. The fourth lip 54 is press-fitted with the outer wall of the worm gear 3. The fourth seal and the third seal work together to prevent lubricating oil from overflowing from the housing 2.

[0042] like Figure 2 As shown, the third lip 53 and the fourth lip 54 can be located at the end of the oil seal 5 away from the base 1. An annular groove 55 can be provided at the end of the oil seal 5 away from the base 1; along the axial direction of the oil seal 5, the bottom surface 551 of the annular groove 55 is located between the second lip 52 and the third lip 53.

[0043] Example 2

[0044] See Figure 1 and Figure 2 This embodiment provides a heliostat, and the azimuth drive device in the heliostat adopts the rotary reducer described in Embodiment 1.

[0045] In this embodiment, the base 1 is specifically the lower flange of the reducer. The worm gear 3 is mounted on the lower flange of the reducer, which is fixed on the column. The worm 4 meshes with the worm gear 3. Driven by the motor, the worm 4 rotates around the worm gear 3 while rotating on its own axis, thereby realizing the rotation of the housing 2 relative to the lower flange of the reducer. Therefore, there needs to be a gap between the lower flange of the reducer and the housing 2. In order to prevent most of the dust and water from entering the housing 2 through this gap, the first lip 51 is fitted with the lower flange of the reducer with a clearance fit.

[0046] Since the first lip 51 is clearance-fitted with the lower flange of the reducer, in order to prevent the remaining small amount of dust and moisture from entering the housing 2, the second lip 52 of the oil seal 5 is transition-fitted with the outer circle of the worm gear 3 (that is, the outer side wall of the worm gear 3).

[0047] To prevent minor wear at the meshing point of the worm gear 3 and the worm 4 and to ensure the working accuracy and stability of the transmission components, lubricating oil needs to be added to the transmission components. Therefore, to prevent the lubricating oil from overflowing from the housing 2, the oil seal 5 is also provided with a third lip 53 and a fourth lip 54. The third lip 53 and the fourth lip 54 are respectively interference-fitted with the outer circle of the worm gear 3 (that is, the outer side wall of the worm gear 3).

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A rotary reducer, characterized in that, Includes base, housing, worm gear, worm, and oil seal; The worm gear is installed on the first side of the base; the worm is meshed with the worm gear; the worm is rotatably installed on the housing, the housing is covered on the first side of the base, and the worm gear and the worm are located inside the housing; when the worm rotates, it rotates around the worm gear to drive the housing to rotate relative to the base; The oil seal is installed between the housing and the base, and is sleeved on the worm gear; The oil seal is installed inside the housing, and the outer wall of the oil seal is connected to the inner wall of the housing. The oil seal has a first lip on the side facing the base, and the first lip cooperates with the first side surface of the base to form a first seal. The inner side of the oil seal has a second lip and a third lip, and the second lip is located between the third lip and the base. The second lip and the outer wall of the worm gear form a second seal, and the third lip and the outer wall of the worm gear form a third seal.

2. The rotary reducer according to claim 1, characterized in that, The inner side of the oil seal is also provided with a fourth lip, and the third lip is located between the fourth lip and the second lip; a fourth seal is formed between the fourth lip and the outer wall of the worm gear.

3. The rotary reducer according to claim 2, characterized in that, The second lip is located at the end of the oil seal near the base, and the third and fourth lips are located at the ends of the oil seal away from the base.

4. The rotary reducer according to claim 1, characterized in that, The first lip is clearance-fitted with the first side surface of the base.

5. The rotary reducer according to claim 1, characterized in that, The second lip and the outer wall of the worm gear transition fit together.

6. The rotary reducer according to claim 1, characterized in that, The third lip and the outer wall of the worm gear are interference-fitted.

7. The rotary reducer according to claim 2, characterized in that, The fourth lip and the outer wall of the worm gear are interference-fitted.

8. The rotary reducer according to claim 1, characterized in that, The oil seal is installed inside the housing via an interference fit between the outer wall of the oil seal and the inner wall of the housing.

9. The rotary reducer according to claim 2 or 3, characterized in that, The oil seal has an annular groove at one end away from the base; along the axial direction of the oil seal, the bottom surface of the annular groove is located between the second lip and the third lip.

10. A heliostat, characterized in that, The azimuth drive device in the heliostat adopts the rotary reducer as described in any one of claims 1 to 9.

Images